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-rw-r--r--libxcb/src/c_client.py4627
-rw-r--r--libxcb/src/xcb_util.c3
2 files changed, 2319 insertions, 2311 deletions
diff --git a/libxcb/src/c_client.py b/libxcb/src/c_client.py
index f56e39c0d..dcf661abc 100644
--- a/libxcb/src/c_client.py
+++ b/libxcb/src/c_client.py
@@ -1,2311 +1,2316 @@
-#!/usr/bin/env python
-from xml.etree.cElementTree import *
-from os.path import basename
-import getopt
-import sys
-import re
-
-# Jump to the bottom of this file for the main routine
-
-# Some hacks to make the API more readable, and to keep backwards compability
-_cname_re = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')
-_cname_special_cases = {'DECnet':'decnet'}
-
-_extension_special_cases = ['XPrint', 'XCMisc', 'BigRequests']
-
-_cplusplus_annoyances = {'class' : '_class',
- 'new' : '_new',
- 'delete': '_delete'}
-_c_keywords = {'default' : '_default'}
-
-_hlines = []
-_hlevel = 0
-_clines = []
-_clevel = 0
-_ns = None
-
-# global variable to keep track of serializers and
-# switch data types due to weird dependencies
-finished_serializers = []
-finished_sizeof = []
-finished_switch = []
-
-def _h(fmt, *args):
- '''
- Writes the given line to the header file.
- '''
- _hlines[_hlevel].append(fmt % args)
-
-def _c(fmt, *args):
- '''
- Writes the given line to the source file.
- '''
- _clines[_clevel].append(fmt % args)
-
-def _hc(fmt, *args):
- '''
- Writes the given line to both the header and source files.
- '''
- _h(fmt, *args)
- _c(fmt, *args)
-
-# XXX See if this level thing is really necessary.
-def _h_setlevel(idx):
- '''
- Changes the array that header lines are written to.
- Supports writing different sections of the header file.
- '''
- global _hlevel
- while len(_hlines) <= idx:
- _hlines.append([])
- _hlevel = idx
-
-def _c_setlevel(idx):
- '''
- Changes the array that source lines are written to.
- Supports writing to different sections of the source file.
- '''
- global _clevel
- while len(_clines) <= idx:
- _clines.append([])
- _clevel = idx
-
-def _n_item(str):
- '''
- Does C-name conversion on a single string fragment.
- Uses a regexp with some hard-coded special cases.
- '''
- if str in _cname_special_cases:
- return _cname_special_cases[str]
- else:
- split = _cname_re.finditer(str)
- name_parts = [match.group(0) for match in split]
- return '_'.join(name_parts)
-
-def _cpp(str):
- '''
- Checks for certain C++ reserved words and fixes them.
- '''
- if str in _cplusplus_annoyances:
- return _cplusplus_annoyances[str]
- elif str in _c_keywords:
- return _c_keywords[str]
- else:
- return str
-
-def _ext(str):
- '''
- Does C-name conversion on an extension name.
- Has some additional special cases on top of _n_item.
- '''
- if str in _extension_special_cases:
- return _n_item(str).lower()
- else:
- return str.lower()
-
-def _n(list):
- '''
- Does C-name conversion on a tuple of strings.
- Different behavior depending on length of tuple, extension/not extension, etc.
- Basically C-name converts the individual pieces, then joins with underscores.
- '''
- if len(list) == 1:
- parts = list
- elif len(list) == 2:
- parts = [list[0], _n_item(list[1])]
- elif _ns.is_ext:
- parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]]
- else:
- parts = [list[0]] + [_n_item(i) for i in list[1:]]
- return '_'.join(parts).lower()
-
-def _t(list):
- '''
- Does C-name conversion on a tuple of strings representing a type.
- Same as _n but adds a "_t" on the end.
- '''
- if len(list) == 1:
- parts = list
- elif len(list) == 2:
- parts = [list[0], _n_item(list[1]), 't']
- elif _ns.is_ext:
- parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]] + ['t']
- else:
- parts = [list[0]] + [_n_item(i) for i in list[1:]] + ['t']
- return '_'.join(parts).lower()
-
-
-def c_open(self):
- '''
- Exported function that handles module open.
- Opens the files and writes out the auto-generated comment, header file includes, etc.
- '''
- global _ns
- _ns = self.namespace
- _ns.c_ext_global_name = _n(_ns.prefix + ('id',))
-
- # Build the type-name collision avoidance table used by c_enum
- build_collision_table()
-
- _h_setlevel(0)
- _c_setlevel(0)
-
- _hc('/*')
- _hc(' * This file generated automatically from %s by c_client.py.', _ns.file)
- _hc(' * Edit at your peril.')
- _hc(' */')
- _hc('')
-
- _h('/**')
- _h(' * @defgroup XCB_%s_API XCB %s API', _ns.ext_name, _ns.ext_name)
- _h(' * @brief %s XCB Protocol Implementation.', _ns.ext_name)
- _h(' * @{')
- _h(' **/')
- _h('')
- _h('#ifndef __%s_H', _ns.header.upper())
- _h('#define __%s_H', _ns.header.upper())
- _h('')
- _h('#include "xcb.h"')
-
- _c('#include <stdlib.h>')
- _c('#include <string.h>')
- _c('#include <assert.h>')
- _c('#include "xcbext.h"')
- _c('#include "%s.h"', _ns.header)
- _c('#include <X11/Xtrans/Xtrans.h>')
-
- if _ns.is_ext:
- for (n, h) in self.imports:
- _hc('#include "%s.h"', h)
-
- _h('')
- _h('#ifdef __cplusplus')
- _h('extern "C" {')
- _h('#endif')
-
- if _ns.is_ext:
- _h('')
- _h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)
- _h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)
- _h(' ') #XXX
- _h('extern xcb_extension_t %s;', _ns.c_ext_global_name)
-
- _c('')
- _c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)
-
-def c_close(self):
- '''
- Exported function that handles module close.
- Writes out all the stored content lines, then closes the files.
- '''
- _h_setlevel(2)
- _c_setlevel(2)
- _hc('')
-
- _h('')
- _h('#ifdef __cplusplus')
- _h('}')
- _h('#endif')
-
- _h('')
- _h('#endif')
- _h('')
- _h('/**')
- _h(' * @}')
- _h(' */')
-
- # Write header file
- hfile = open('%s.h' % _ns.header, 'w')
- for list in _hlines:
- for line in list:
- hfile.write(line)
- hfile.write('\n')
- hfile.close()
-
- # Write source file
- cfile = open('%s.c' % _ns.header, 'w')
- for list in _clines:
- for line in list:
- cfile.write(line)
- cfile.write('\n')
- cfile.close()
-
-def build_collision_table():
- global namecount
- namecount = {}
-
- for v in module.types.values():
- name = _t(v[0])
- namecount[name] = (namecount.get(name) or 0) + 1
-
-def c_enum(self, name):
- '''
- Exported function that handles enum declarations.
- '''
-
- tname = _t(name)
- if namecount[tname] > 1:
- tname = _t(name + ('enum',))
-
- _h_setlevel(0)
- _h('')
- _h('typedef enum %s {', tname)
-
- count = len(self.values)
-
- for (enam, eval) in self.values:
- count = count - 1
- equals = ' = ' if eval != '' else ''
- comma = ',' if count > 0 else ''
- _h(' %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)
-
- _h('} %s;', tname)
-
-def _c_type_setup(self, name, postfix):
- '''
- Sets up all the C-related state by adding additional data fields to
- all Field and Type objects. Here is where we figure out most of our
- variable and function names.
-
- Recurses into child fields and list member types.
- '''
- # Do all the various names in advance
- self.c_type = _t(name + postfix)
- self.c_wiretype = 'char' if self.c_type == 'void' else self.c_type
-
- self.c_iterator_type = _t(name + ('iterator',))
- self.c_next_name = _n(name + ('next',))
- self.c_end_name = _n(name + ('end',))
-
- self.c_request_name = _n(name)
- self.c_checked_name = _n(name + ('checked',))
- self.c_unchecked_name = _n(name + ('unchecked',))
- self.c_reply_name = _n(name + ('reply',))
- self.c_reply_type = _t(name + ('reply',))
- self.c_cookie_type = _t(name + ('cookie',))
-
- self.need_aux = False
- self.need_serialize = False
- self.need_sizeof = False
-
- self.c_aux_name = _n(name + ('aux',))
- self.c_aux_checked_name = _n(name + ('aux', 'checked'))
- self.c_aux_unchecked_name = _n(name + ('aux', 'unchecked'))
- self.c_serialize_name = _n(name + ('serialize',))
- self.c_unserialize_name = _n(name + ('unserialize',))
- self.c_unpack_name = _n(name + ('unpack',))
- self.c_sizeof_name = _n(name + ('sizeof',))
-
- # special case: structs where variable size fields are followed by fixed size fields
- self.var_followed_by_fixed_fields = False
-
- if self.is_switch:
- self.need_serialize = True
- self.c_container = 'struct'
- for bitcase in self.bitcases:
- bitcase.c_field_name = _cpp(bitcase.field_name)
- bitcase_name = bitcase.field_type if bitcase.type.has_name else name
- _c_type_setup(bitcase.type, bitcase_name, ())
-
- elif self.is_container:
-
- self.c_container = 'union' if self.is_union else 'struct'
- prev_varsized_field = None
- prev_varsized_offset = 0
- first_field_after_varsized = None
-
- for field in self.fields:
- _c_type_setup(field.type, field.field_type, ())
- if field.type.is_list:
- _c_type_setup(field.type.member, field.field_type, ())
- if (field.type.nmemb is None):
- self.need_sizeof = True
-
- field.c_field_type = _t(field.field_type)
- field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type
- field.c_field_name = _cpp(field.field_name)
- field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
- field.c_pointer = ' ' if field.type.nmemb == 1 else '*'
-
- # correct the c_pointer field for variable size non-list types
- if not field.type.fixed_size() and field.c_pointer == ' ':
- field.c_pointer = '*'
- if field.type.is_list and not field.type.member.fixed_size():
- field.c_pointer = '*'
-
- if field.type.is_switch:
- field.c_pointer = '*'
- field.c_field_const_type = 'const ' + field.c_field_type
- self.need_aux = True
- elif not field.type.fixed_size() and not field.type.is_bitcase:
- self.need_sizeof = True
-
- field.c_iterator_type = _t(field.field_type + ('iterator',)) # xcb_fieldtype_iterator_t
- field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator
- field.c_accessor_name = _n(name + (field.field_name,)) # xcb_container_field
- field.c_length_name = _n(name + (field.field_name, 'length')) # xcb_container_field_length
- field.c_end_name = _n(name + (field.field_name, 'end')) # xcb_container_field_end
-
- field.prev_varsized_field = prev_varsized_field
- field.prev_varsized_offset = prev_varsized_offset
-
- if prev_varsized_offset == 0:
- first_field_after_varsized = field
- field.first_field_after_varsized = first_field_after_varsized
-
- if field.type.fixed_size():
- prev_varsized_offset += field.type.size
- # special case: intermixed fixed and variable size fields
- if prev_varsized_field is not None and not field.type.is_pad and field.wire:
- if not self.is_union:
- self.need_serialize = True
- self.var_followed_by_fixed_fields = True
- else:
- self.last_varsized_field = field
- prev_varsized_field = field
- prev_varsized_offset = 0
-
- if self.var_followed_by_fixed_fields:
- if field.type.fixed_size():
- field.prev_varsized_field = None
-
- if self.need_serialize:
- # when _unserialize() is wanted, create _sizeof() as well for consistency reasons
- self.need_sizeof = True
-
- # as switch does never appear at toplevel,
- # continue here with type construction
- if self.is_switch:
- if self.c_type not in finished_switch:
- finished_switch.append(self.c_type)
- # special: switch C structs get pointer fields for variable-sized members
- _c_complex(self)
- for bitcase in self.bitcases:
- bitcase_name = bitcase.type.name if bitcase.type.has_name else name
- _c_accessors(bitcase.type, bitcase_name, bitcase_name)
- # no list with switch as element, so no call to
- # _c_iterator(field.type, field_name) necessary
-
- if not self.is_bitcase:
- if self.need_serialize:
- if self.c_serialize_name not in finished_serializers:
- finished_serializers.append(self.c_serialize_name)
- _c_serialize('serialize', self)
-
- # _unpack() and _unserialize() are only needed for special cases:
- # switch -> unpack
- # special cases -> unserialize
- if self.is_switch or self.var_followed_by_fixed_fields:
- _c_serialize('unserialize', self)
-
- if self.need_sizeof:
- if self.c_sizeof_name not in finished_sizeof:
- if not module.namespace.is_ext or self.name[:2] == module.namespace.prefix:
- finished_sizeof.append(self.c_sizeof_name)
- _c_serialize('sizeof', self)
-# _c_type_setup()
-
-def _c_helper_absolute_name(prefix, field=None):
- """
- turn prefix, which is a list of tuples (name, separator, Type obj) into a string
- representing a valid name in C (based on the context)
- if field is not None, append the field name as well
- """
- prefix_str = ''
- for name, sep, obj in prefix:
- prefix_str += name
- if '' == sep:
- sep = '->'
- if ((obj.is_bitcase and obj.has_name) or # named bitcase
- (obj.is_switch and len(obj.parents)>1)):
- sep = '.'
- prefix_str += sep
- if field is not None:
- prefix_str += _cpp(field.field_name)
- return prefix_str
-# _c_absolute_name
-
-def _c_helper_field_mapping(complex_type, prefix, flat=False):
- """
- generate absolute names, based on prefix, for all fields starting from complex_type
- if flat == True, nested complex types are not taken into account
- """
- all_fields = {}
- if complex_type.is_switch:
- for b in complex_type.bitcases:
- if b.type.has_name:
- switch_name, switch_sep, switch_type = prefix[-1]
- bitcase_prefix = prefix + [(b.type.name[-1], '.', b.type)]
- else:
- bitcase_prefix = prefix
-
- if (True==flat and not b.type.has_name) or False==flat:
- all_fields.update(_c_helper_field_mapping(b.type, bitcase_prefix, flat))
- else:
- for f in complex_type.fields:
- fname = _c_helper_absolute_name(prefix, f)
- if all_fields.has_key(f.field_name):
- raise Exception("field name %s has been registered before" % f.field_name)
-
- all_fields[f.field_name] = (fname, f)
- if f.type.is_container and flat==False:
- if f.type.is_bitcase and not f.type.has_name:
- new_prefix = prefix
- elif f.type.is_switch and len(f.type.parents)>1:
- # nested switch gets another separator
- new_prefix = prefix+[(f.c_field_name, '.', f.type)]
- else:
- new_prefix = prefix+[(f.c_field_name, '->', f.type)]
- all_fields.update(_c_helper_field_mapping(f.type, new_prefix, flat))
-
- return all_fields
-# _c_field_mapping()
-
-def _c_helper_resolve_field_names (prefix):
- """
- get field names for all objects in the prefix array
- """
- all_fields = {}
- tmp_prefix = []
- # look for fields in the remaining containers
- for idx, p in enumerate(prefix):
- name, sep, obj = p
- if ''==sep:
- # sep can be preset in prefix, if not, make a sensible guess
- sep = '.' if (obj.is_switch or obj.is_bitcase) else '->'
- # exception: 'toplevel' object (switch as well!) always have sep '->'
- sep = '->' if idx<1 else sep
- if not obj.is_bitcase or (obj.is_bitcase and obj.has_name):
- tmp_prefix.append((name, sep, obj))
- all_fields.update(_c_helper_field_mapping(obj, tmp_prefix, flat=True))
-
- return all_fields
-# _c_helper_resolve_field_names
-
-def get_expr_fields(self):
- """
- get the Fields referenced by switch or list expression
- """
- def get_expr_field_names(expr):
- if expr.op is None:
- if expr.lenfield_name is not None:
- return [expr.lenfield_name]
- else:
- # constant value expr
- return []
- else:
- if expr.op == '~':
- return get_expr_field_names(expr.rhs)
- elif expr.op == 'popcount':
- return get_expr_field_names(expr.rhs)
- elif expr.op == 'sumof':
- # sumof expr references another list,
- # we need that list's length field here
- field = None
- for f in expr.lenfield_parent.fields:
- if f.field_name == expr.lenfield_name:
- field = f
- break
- if field is None:
- raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
- # referenced list + its length field
- return [expr.lenfield_name] + get_expr_field_names(field.type.expr)
- elif expr.op == 'enumref':
- return []
- else:
- return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
- # get_expr_field_names()
-
- # resolve the field names with the parent structure(s)
- unresolved_fields_names = get_expr_field_names(self.expr)
-
- # construct prefix from self
- prefix = [('', '', p) for p in self.parents]
- if self.is_container:
- prefix.append(('', '', self))
-
- all_fields = _c_helper_resolve_field_names (prefix)
- resolved_fields_names = filter(lambda x: x in all_fields.keys(), unresolved_fields_names)
- if len(unresolved_fields_names) != len(resolved_fields_names):
- raise Exception("could not resolve all fields for %s" % self.name)
-
- resolved_fields = [all_fields[n][1] for n in resolved_fields_names]
- return resolved_fields
-# get_expr_fields()
-
-def resolve_expr_fields(complex_obj):
- """
- find expr fields appearing in complex_obj and descendents that cannot be resolved within complex_obj
- these are normally fields that need to be given as function parameters
- """
- all_fields = []
- expr_fields = []
- unresolved = []
-
- for field in complex_obj.fields:
- all_fields.append(field)
- if field.type.is_switch or field.type.is_list:
- expr_fields += get_expr_fields(field.type)
- if field.type.is_container:
- expr_fields += resolve_expr_fields(field.type)
-
- # try to resolve expr fields
- for e in expr_fields:
- if e not in all_fields and e not in unresolved:
- unresolved.append(e)
- return unresolved
-# resolve_expr_fields()
-
-def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
- """
- functions like _serialize(), _unserialize(), and _unpack() sometimes need additional parameters:
- E.g. in order to unpack switch, extra parameters might be needed to evaluate the switch
- expression. This function tries to resolve all fields within a structure, and returns the
- unresolved fields as the list of external parameters.
- """
- def add_param(params, param):
- if param not in params:
- params.append(param)
-
- # collect all fields into param_fields
- param_fields = []
- wire_fields = []
-
- for field in self.fields:
- if field.visible:
- # the field should appear as a parameter in the function call
- param_fields.append(field)
- if field.wire and not field.auto:
- if field.type.fixed_size() and not self.is_switch:
- # field in the xcb_out structure
- wire_fields.append(field)
- # fields like 'pad0' are skipped!
-
- # in case of switch, parameters always contain any fields referenced in the switch expr
- # we do not need any variable size fields here, as the switch data type contains both
- # fixed and variable size fields
- if self.is_switch:
- param_fields = get_expr_fields(self)
-
- # _serialize()/_unserialize()/_unpack() function parameters
- # note: don't use set() for params, it is unsorted
- params = []
-
- # 1. the parameter for the void * buffer
- if 'serialize' == context:
- params.append(('void', '**', buffer_var))
- elif context in ('unserialize', 'unpack', 'sizeof'):
- params.append(('const void', '*', buffer_var))
-
- # 2. any expr fields that cannot be resolved within self and descendants
- unresolved_fields = resolve_expr_fields(self)
- for f in unresolved_fields:
- add_param(params, (f.c_field_type, '', f.c_field_name))
-
- # 3. param_fields contain the fields necessary to evaluate the switch expr or any other fields
- # that do not appear in the data type struct
- for p in param_fields:
- if self.is_switch:
- typespec = p.c_field_const_type
- pointerspec = p.c_pointer
- add_param(params, (typespec, pointerspec, p.c_field_name))
- else:
- if p.visible and not p.wire and not p.auto:
- typespec = p.c_field_type
- pointerspec = ''
- add_param(params, (typespec, pointerspec, p.c_field_name))
-
- # 4. aux argument
- if 'serialize' == context:
- add_param(params, ('const %s' % self.c_type, '*', aux_var))
- elif 'unserialize' == context:
- add_param(params, ('%s' % self.c_type, '**', aux_var))
- elif 'unpack' == context:
- add_param(params, ('%s' % self.c_type, '*', aux_var))
-
- # 5. switch contains all variable size fields as struct members
- # for other data types though, these have to be supplied separately
- # this is important for the special case of intermixed fixed and
- # variable size fields
- if not self.is_switch and 'serialize' == context:
- for p in param_fields:
- if not p.type.fixed_size():
- add_param(params, (p.c_field_const_type, '*', p.c_field_name))
-
- return (param_fields, wire_fields, params)
-# get_serialize_params()
-
-def _c_serialize_helper_insert_padding(context, code_lines, space, postpone):
- code_lines.append('%s /* insert padding */' % space)
- code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
-# code_lines.append('%s printf("automatically inserting padding: %%%%d\\n", xcb_pad);' % space)
- code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
-
- if not postpone:
- code_lines.append('%s if (0 != xcb_pad) {' % space)
-
- if 'serialize' == context:
- code_lines.append('%s xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;' % space)
- code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_pad;' % space)
- code_lines.append('%s xcb_parts_idx++;' % space)
- elif context in ('unserialize', 'unpack', 'sizeof'):
- code_lines.append('%s xcb_tmp += xcb_pad;' % space)
-
- code_lines.append('%s xcb_pad = 0;' % space)
- code_lines.append('%s }' % space)
-
- code_lines.append('%s xcb_block_len = 0;' % space)
-
- # keep tracking of xcb_parts entries for serialize
- return 1
-# _c_serialize_helper_insert_padding()
-
-def _c_serialize_helper_switch(context, self, complex_name,
- code_lines, temp_vars,
- space, prefix):
- count = 0
- switch_expr = _c_accessor_get_expr(self.expr, None)
-
- for b in self.bitcases:
- bitcase_expr = _c_accessor_get_expr(b.type.expr, None)
- code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
-# code_lines.append(' printf("switch %s: entering bitcase section %s (mask=%%%%d)...\\n", %s);' %
-# (self.name[-1], b.type.name[-1], bitcase_expr))
- b_prefix = prefix
- if b.type.has_name:
- b_prefix = prefix + [(b.c_field_name, '.', b.type)]
-
- count += _c_serialize_helper_fields(context, b.type,
- code_lines, temp_vars,
- "%s " % space,
- b_prefix,
- is_bitcase = True)
- code_lines.append(' }')
-
-# if 'serialize' == context:
-# count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
-# elif context in ('unserialize', 'unpack', 'sizeof'):
-# # padding
-# code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
-# code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
-
- return count
-# _c_serialize_helper_switch
-
-def _c_serialize_helper_switch_field(context, self, field, c_switch_variable, prefix):
- """
- handle switch by calling _serialize() or _unpack(), depending on context
- """
- # switch is handled by this function as a special case
- param_fields, wire_fields, params = get_serialize_params(context, self)
- field_mapping = _c_helper_field_mapping(self, prefix)
- prefix_str = _c_helper_absolute_name(prefix)
-
- # find the parameters that need to be passed to _serialize()/_unpack():
- # all switch expr fields must be given as parameters
- args = get_expr_fields(field.type)
- # length fields for variable size types in switch, normally only some of need
- # need to be passed as parameters
- switch_len_fields = resolve_expr_fields(field.type)
-
- # a switch field at this point _must_ be a bitcase field
- # we require that bitcases are "self-contiguous"
- bitcase_unresolved = resolve_expr_fields(self)
- if len(bitcase_unresolved) != 0:
- raise Exception('unresolved fields within bitcase is not supported at this point')
-
- # get the C names for the parameters
- c_field_names = ''
- for a in switch_len_fields:
- c_field_names += "%s, " % field_mapping[a.c_field_name][0]
- for a in args:
- c_field_names += "%s, " % field_mapping[a.c_field_name][0]
-
- # call _serialize()/_unpack() to determine the actual size
- if 'serialize' == context:
- length = "%s(&%s, %s&%s%s)" % (field.type.c_serialize_name, c_switch_variable,
- c_field_names, prefix_str, field.c_field_name)
- elif context in ('unserialize', 'unpack'):
- length = "%s(xcb_tmp, %s&%s%s)" % (field.type.c_unpack_name,
- c_field_names, prefix_str, field.c_field_name)
-
- return length
-# _c_serialize_helper_switch_field()
-
-def _c_serialize_helper_list_field(context, self, field,
- code_lines, temp_vars,
- space, prefix):
- """
- helper function to cope with lists of variable length
- """
- expr = field.type.expr
- prefix_str = _c_helper_absolute_name(prefix)
- param_fields, wire_fields, params = get_serialize_params('sizeof', self)
- param_names = [p[2] for p in params]
-
- expr_fields_names = [f.field_name for f in get_expr_fields(field.type)]
- resolved = filter(lambda x: x in param_names, expr_fields_names)
- unresolved = filter(lambda x: x not in param_names, expr_fields_names)
-
- field_mapping = {}
- for r in resolved:
- field_mapping[r] = (r, None)
-
- if len(unresolved)>0:
- tmp_prefix = prefix
- if len(tmp_prefix)==0:
- raise Exception("found an empty prefix while resolving expr field names for list %s",
- field.c_field_name)
-
- field_mapping.update(_c_helper_resolve_field_names(prefix))
- resolved += filter(lambda x: x in field_mapping, unresolved)
- unresolved = filter(lambda x: x not in field_mapping, unresolved)
- if len(unresolved)>0:
- raise Exception('could not resolve the length fields required for list %s' % field.c_field_name)
-
- list_length = _c_accessor_get_expr(expr, field_mapping)
-
- # default: list with fixed size elements
- length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
-
- # list with variable-sized elements
- if not field.type.member.fixed_size():
- length = ''
- if context in ('unserialize', 'sizeof', 'unpack'):
- int_i = ' unsigned int i;'
- xcb_tmp_len = ' unsigned int xcb_tmp_len;'
- if int_i not in temp_vars:
- temp_vars.append(int_i)
- if xcb_tmp_len not in temp_vars:
- temp_vars.append(xcb_tmp_len)
- # loop over all list elements and call sizeof repeatedly
- # this should be a bit faster than using the iterators
- code_lines.append("%s for(i=0; i<%s; i++) {" % (space, list_length))
- code_lines.append("%s xcb_tmp_len = %s(xcb_tmp);" %
- (space, field.type.c_sizeof_name))
- code_lines.append("%s xcb_block_len += xcb_tmp_len;" % space)
- code_lines.append("%s xcb_tmp += xcb_tmp_len;" % space)
- code_lines.append("%s }" % space)
-
- elif 'serialize' == context:
- code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = 0;' % space)
- code_lines.append('%s xcb_tmp = (char *) %s%s;' % (space, prefix_str, field.c_field_name))
- code_lines.append('%s for(i=0; i<%s; i++) { ' % (space, list_length))
- code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_sizeof_name))
- code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
- code_lines.append('%s }' % space)
- code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
-
- return length
-# _c_serialize_helper_list_field()
-
-def _c_serialize_helper_fields_fixed_size(context, self, field,
- code_lines, temp_vars,
- space, prefix):
- # keep the C code a bit more readable by giving the field name
- if not self.is_bitcase:
- code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
- else:
- scoped_name = [p[2].c_type if idx==0 else p[0] for idx, p in enumerate(prefix)]
- typename = reduce(lambda x,y: "%s.%s" % (x, y), scoped_name)
- code_lines.append('%s /* %s.%s */' % (space, typename, field.c_field_name))
-
- abs_field_name = _c_helper_absolute_name(prefix, field)
- # default for simple cases: call sizeof()
- length = "sizeof(%s)" % field.c_field_type
-
- if context in ('unserialize', 'unpack', 'sizeof'):
- # default: simple cast
- value = ' %s = *(%s *)xcb_tmp;' % (abs_field_name, field.c_field_type)
-
- # padding - we could probably just ignore it
- if field.type.is_pad and field.type.nmemb > 1:
- value = ''
- for i in range(field.type.nmemb):
- code_lines.append('%s %s[%d] = *(%s *)xcb_tmp;' %
- (space, abs_field_name, i, field.c_field_type))
- # total padding = sizeof(pad0) * nmemb
- length += " * %d" % field.type.nmemb
-
- if field.type.is_list:
- # no such case in the protocol, cannot be tested and therefore ignored for now
- raise Exception('list with fixed number of elemens unhandled in _unserialize()')
-
- elif 'serialize' == context:
- value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
-
- if field.type.is_expr:
- # need to register a temporary variable for the expression in case we know its type
- if field.type.c_type is None:
- raise Exception("type for field '%s' (expression '%s') unkown" %
- (field.field_name, _c_accessor_get_expr(field.type.expr)))
-
- temp_vars.append(' %s xcb_expr_%s = %s;' % (field.type.c_type, _cpp(field.field_name),
- _c_accessor_get_expr(field.type.expr, prefix)))
- value += "&xcb_expr_%s;" % _cpp(field.field_name)
-
- elif field.type.is_pad:
- if field.type.nmemb == 1:
- value += "&xcb_pad;"
- else:
- # we could also set it to 0, see definition of xcb_send_request()
- value = ' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;'
- length += "*%d" % field.type.nmemb
-
- else:
- # non-list type with fixed size
- if field.type.nmemb == 1:
- value += "&%s;" % (abs_field_name)
-
- # list with nmemb (fixed size) elements
- else:
- value += '%s;' % (abs_field_name)
- length = '%d' % field.type.nmemb
-
- return (value, length)
-# _c_serialize_helper_fields_fixed_size()
-
-def _c_serialize_helper_fields_variable_size(context, self, field,
- code_lines, temp_vars,
- space, prefix):
- prefix_str = _c_helper_absolute_name(prefix)
-
- if context in ('unserialize', 'unpack', 'sizeof'):
- value = ''
- var_field_name = 'xcb_tmp'
-
- # special case: intermixed fixed and variable size fields
- if self.var_followed_by_fixed_fields and 'unserialize' == context:
- value = ' %s = (%s *)xcb_tmp;' % (field.c_field_name, field.c_field_type)
- temp_vars.append(' %s *%s;' % (field.type.c_type, field.c_field_name))
- # special case: switch
- if 'unpack' == context:
- value = ' %s%s = (%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
-
- elif 'serialize' == context:
- # variable size fields appear as parameters to _serialize() if the
- # 'toplevel' container is not a switch
- prefix_string = prefix_str if prefix[0][2].is_switch else ''
- var_field_name = "%s%s" % (prefix_string, field.c_field_name)
- value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s;' % var_field_name
-
- length = ''
-
- code_lines.append('%s /* %s */' % (space, field.c_field_name))
-
- if field.type.is_list:
- if value != '':
- # in any context, list is already a pointer, so the default assignment is ok
- code_lines.append("%s%s" % (space, value))
- value = ''
- length = _c_serialize_helper_list_field(context, self, field,
- code_lines, temp_vars,
- space, prefix)
-
- elif field.type.is_switch:
- value = ''
- if context == 'serialize':
- # the _serialize() function allocates the correct amount memory if given a NULL pointer
- value = ' xcb_parts[xcb_parts_idx].iov_base = (char *)0;'
- length = _c_serialize_helper_switch_field(context, self, field,
- 'xcb_parts[xcb_parts_idx].iov_base',
- prefix)
-
- else:
- # in all remaining special cases - call _sizeof()
- length = "%s(%s)" % (field.type.c_sizeof_name, var_field_name)
-
- return (value, length)
-# _c_serialize_helper_fields_variable_size
-
-def _c_serialize_helper_fields(context, self,
- code_lines, temp_vars,
- space, prefix, is_bitcase):
- count = 0
- need_padding = False
- prev_field_was_variable = False
-
- for field in self.fields:
- if not field.visible:
- if not ((field.wire and not field.auto) or 'unserialize' == context):
- continue
-
- # switch/bitcase: fixed size fields must be considered explicitly
- if field.type.fixed_size():
- if self.is_bitcase or self.var_followed_by_fixed_fields:
- if prev_field_was_variable and need_padding:
- # insert padding
-# count += _c_serialize_helper_insert_padding(context, code_lines, space,
-# self.var_followed_by_fixed_fields)
- prev_field_was_variable = False
-
- # prefix for fixed size fields
- fixed_prefix = prefix
-
- value, length = _c_serialize_helper_fields_fixed_size(context, self, field,
- code_lines, temp_vars,
- space, fixed_prefix)
- else:
- continue
-
- # fields with variable size
- else:
- # switch/bitcase: always calculate padding before and after variable sized fields
- if need_padding or is_bitcase:
- count += _c_serialize_helper_insert_padding(context, code_lines, space,
- self.var_followed_by_fixed_fields)
-
- value, length = _c_serialize_helper_fields_variable_size(context, self, field,
- code_lines, temp_vars,
- space, prefix)
- prev_field_was_variable = True
-
- # save (un)serialization C code
- if '' != value:
- code_lines.append('%s%s' % (space, value))
-
- if field.type.fixed_size():
- if is_bitcase or self.var_followed_by_fixed_fields:
- # keep track of (un)serialized object's size
- code_lines.append('%s xcb_block_len += %s;' % (space, length))
- if context in ('unserialize', 'unpack', 'sizeof'):
- code_lines.append('%s xcb_tmp += %s;' % (space, length))
- else:
- # variable size objects or bitcase:
- # value & length might have been inserted earlier for special cases
- if '' != length:
- # special case: intermixed fixed and variable size fields
- if (not field.type.fixed_size() and
- self.var_followed_by_fixed_fields and 'unserialize' == context):
- temp_vars.append(' int %s_len;' % field.c_field_name)
- code_lines.append('%s %s_len = %s;' % (space, field.c_field_name, length))
- code_lines.append('%s xcb_block_len += %s_len;' % (space, field.c_field_name))
- code_lines.append('%s xcb_tmp += %s_len;' % (space, field.c_field_name))
- else:
- code_lines.append('%s xcb_block_len += %s;' % (space, length))
- # increase pointer into the byte stream accordingly
- if context in ('unserialize', 'sizeof', 'unpack'):
- code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
-
- if 'serialize' == context:
- if '' != length:
- code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = %s;' % (space, length))
- code_lines.append('%s xcb_parts_idx++;' % space)
- count += 1
-
- need_padding = True
- if self.var_followed_by_fixed_fields:
- need_padding = False
-
- return count
-# _c_serialize_helper_fields()
-
-def _c_serialize_helper(context, complex_type,
- code_lines, temp_vars,
- space='', prefix=[]):
- # count tracks the number of fields to serialize
- count = 0
-
- if hasattr(complex_type, 'type'):
- self = complex_type.type
- complex_name = complex_type.name
- else:
- self = complex_type
- if self.var_followed_by_fixed_fields and 'unserialize' == context:
- complex_name = 'xcb_out'
- else:
- complex_name = '_aux'
-
- # special case: switch is serialized by evaluating each bitcase separately
- if self.is_switch:
- count += _c_serialize_helper_switch(context, self, complex_name,
- code_lines, temp_vars,
- space, prefix)
-
- # all other data types can be evaluated one field a time
- else:
- # unserialize & fixed size fields: simply cast the buffer to the respective xcb_out type
- if context in ('unserialize', 'unpack', 'sizeof') and not self.var_followed_by_fixed_fields:
- code_lines.append('%s xcb_block_len += sizeof(%s);' % (space, self.c_type))
- code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
- # probably not needed
- #_c_serialize_helper_insert_padding(context, code_lines, space, False)
-
- count += _c_serialize_helper_fields(context, self,
- code_lines, temp_vars,
- space, prefix, False)
- # "final padding"
- count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
-
- return count
-# _c_serialize_helper()
-
-def _c_serialize(context, self):
- """
- depending on the context variable, generate _serialize(), _unserialize(), _unpack(), or _sizeof()
- for the ComplexType variable self
- """
- _h_setlevel(1)
- _c_setlevel(1)
-
- _hc('')
- # _serialize() returns the buffer size
- _hc('int')
-
- if self.is_switch and 'unserialize' == context:
- context = 'unpack'
-
- cases = { 'serialize' : self.c_serialize_name,
- 'unserialize' : self.c_unserialize_name,
- 'unpack' : self.c_unpack_name,
- 'sizeof' : self.c_sizeof_name }
- func_name = cases[context]
-
- param_fields, wire_fields, params = get_serialize_params(context, self)
- variable_size_fields = 0
- # maximum space required for type definition of function arguments
- maxtypelen = 0
-
- # determine N(variable_fields)
- for field in param_fields:
- # if self.is_switch, treat all fields as if they are variable sized
- if not field.type.fixed_size() or self.is_switch:
- variable_size_fields += 1
- # determine maxtypelen
- for p in params:
- maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
-
- # write to .c/.h
- indent = ' '*(len(func_name)+2)
- param_str = []
- for p in params:
- typespec, pointerspec, field_name = p
- spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
- param_str.append("%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name))
- # insert function name
- param_str[0] = "%s (%s" % (func_name, param_str[0].strip())
- param_str = map(lambda x: "%s," % x, param_str)
- for s in param_str[:-1]:
- _hc(s)
- _h("%s);" % param_str[-1].rstrip(','))
- _c("%s)" % param_str[-1].rstrip(','))
- _c('{')
-
- code_lines = []
- temp_vars = []
- prefix = []
-
- if 'serialize' == context:
- if not self.is_switch and not self.var_followed_by_fixed_fields:
- _c(' %s *xcb_out = *_buffer;', self.c_type)
- _c(' unsigned int xcb_out_pad = -sizeof(%s) & 3;', self.c_type)
- _c(' unsigned int xcb_buffer_len = sizeof(%s) + xcb_out_pad;', self.c_type)
- else:
- _c(' char *xcb_out = *_buffer;')
- _c(' unsigned int xcb_buffer_len = 0;')
- prefix = [('_aux', '->', self)]
- aux_ptr = 'xcb_out'
-
- elif context in ('unserialize', 'unpack'):
- _c(' char *xcb_tmp = (char *)_buffer;')
- if not self.is_switch:
- if not self.var_followed_by_fixed_fields:
- _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
- prefix = [('_aux', '->', self)]
- else:
- _c(' %s xcb_out;', self.c_type)
- prefix = [('xcb_out', '.', self)]
- else:
- aux_var = '_aux' # default for unpack: single pointer
- # note: unserialize not generated for switch
- if 'unserialize' == context:
- aux_var = '(*_aux)' # unserialize: double pointer (!)
- prefix = [(aux_var, '->', self)]
- aux_ptr = '*_aux'
- _c(' unsigned int xcb_buffer_len = 0;')
- _c(' unsigned int xcb_block_len = 0;')
- _c(' unsigned int xcb_pad = 0;')
-
- elif 'sizeof' == context:
- param_names = [p[2] for p in params]
- if self.is_switch:
- # switch: call _unpack()
- _c(' %s _aux;', self.c_type)
- _c(' return %s(%s, &_aux);', self.c_unpack_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
- _c('}')
- return
- elif self.var_followed_by_fixed_fields:
- # special case: call _unserialize()
- _c(' return %s(%s, NULL);', self.c_unserialize_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
- _c('}')
- return
- else:
- _c(' char *xcb_tmp = (char *)_buffer;')
- prefix = [('_aux', '->', self)]
-
- count = _c_serialize_helper(context, self, code_lines, temp_vars, prefix=prefix)
- # update variable size fields (only important for context=='serialize'
- variable_size_fields = count
- if 'serialize' == context:
- temp_vars.append(' unsigned int xcb_pad = 0;')
- temp_vars.append(' char xcb_pad0[3] = {0, 0, 0};')
- temp_vars.append(' struct iovec xcb_parts[%d];' % count)
- temp_vars.append(' unsigned int xcb_parts_idx = 0;')
- temp_vars.append(' unsigned int xcb_block_len = 0;')
- temp_vars.append(' unsigned int i;')
- temp_vars.append(' char *xcb_tmp;')
- elif 'sizeof' == context:
- # neither switch nor intermixed fixed and variable size fields:
- # evaluate parameters directly
- if not (self.is_switch or self.var_followed_by_fixed_fields):
-
- # look if we have to declare an '_aux' variable at all
- if len(filter(lambda x: x.find('_aux')!=-1, code_lines))>0:
- if not self.var_followed_by_fixed_fields:
- _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
- else:
- _c(' %s *_aux = malloc(sizeof(%s));', self.c_type, self.c_type)
-
- _c(' unsigned int xcb_buffer_len = 0;')
- _c(' unsigned int xcb_block_len = 0;')
- _c(' unsigned int xcb_pad = 0;')
-
- _c('')
- for t in temp_vars:
- _c(t)
- _c('')
- for l in code_lines:
- _c(l)
-
- # variable sized fields have been collected, now
- # allocate memory and copy everything into a continuous memory area
- # note: this is not necessary in case of unpack
- if context in ('serialize', 'unserialize'):
- # unserialize: check for sizeof-only invocation
- if 'unserialize' == context:
- _c('')
- _c(' if (NULL == _aux)')
- _c(' return xcb_buffer_len;')
-
- _c('')
- _c(' if (NULL == %s) {', aux_ptr)
- _c(' /* allocate memory */')
- _c(' %s = malloc(xcb_buffer_len);', aux_ptr)
- if 'serialize' == context:
- _c(' *_buffer = xcb_out;')
- _c(' }')
- _c('')
-
- # serialize: handle variable size fields in a loop
- if 'serialize' == context:
- if not self.is_switch and not self.var_followed_by_fixed_fields:
- if len(wire_fields)>0:
- _c(' *xcb_out = *_aux;')
- # copy variable size fields into the buffer
- if variable_size_fields > 0:
- # xcb_out padding
- if not self.is_switch and not self.var_followed_by_fixed_fields:
- _c(' xcb_tmp = (char*)++xcb_out;')
- _c(' xcb_tmp += xcb_out_pad;')
- else:
- _c(' xcb_tmp = xcb_out;')
-
- # variable sized fields
- _c(' for(i=0; i<xcb_parts_idx; i++) {')
- _c(' if (0 != xcb_parts[i].iov_base && 0 != xcb_parts[i].iov_len)')
- _c(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
- _c(' if (0 != xcb_parts[i].iov_len)')
- _c(' xcb_tmp += xcb_parts[i].iov_len;')
- _c(' }')
-
- # unserialize: assign variable size fields individually
- if 'unserialize' == context:
- _c(' xcb_tmp = ((char *)*_aux)+xcb_buffer_len;')
- param_fields.reverse()
- for field in param_fields:
- if not field.type.fixed_size():
- _c(' xcb_tmp -= %s_len;', field.c_field_name)
- _c(' memmove(xcb_tmp, %s, %s_len);', field.c_field_name, field.c_field_name)
- _c(' *%s = xcb_out;', aux_ptr)
-
- _c('')
- _c(' return xcb_buffer_len;')
- _c('}')
-# _c_serialize()
-
-def _c_iterator_get_end(field, accum):
- '''
- Figures out what C code is needed to find the end of a variable-length structure field.
- For nested structures, recurses into its last variable-sized field.
- For lists, calls the end function
- '''
- if field.type.is_container:
- accum = field.c_accessor_name + '(' + accum + ')'
- return _c_iterator_get_end(field.type.last_varsized_field, accum)
- if field.type.is_list:
- # XXX we can always use the first way
- if field.type.member.is_simple:
- return field.c_end_name + '(' + accum + ')'
- else:
- return field.type.member.c_end_name + '(' + field.c_iterator_name + '(' + accum + '))'
-
-def _c_iterator(self, name):
- '''
- Declares the iterator structure and next/end functions for a given type.
- '''
- _h_setlevel(0)
- _h('')
- _h('/**')
- _h(' * @brief %s', self.c_iterator_type)
- _h(' **/')
- _h('typedef struct %s {', self.c_iterator_type)
- _h(' %s *data; /**< */', self.c_type)
- _h(' int%s rem; /**< */', ' ' * (len(self.c_type) - 2))
- _h(' int%s index; /**< */', ' ' * (len(self.c_type) - 2))
- _h('} %s;', self.c_iterator_type)
-
- _h_setlevel(1)
- _c_setlevel(1)
- _h('')
- _h('/**')
- _h(' * Get the next element of the iterator')
- _h(' * @param i Pointer to a %s', self.c_iterator_type)
- _h(' *')
- _h(' * Get the next element in the iterator. The member rem is')
- _h(' * decreased by one. The member data points to the next')
- _h(' * element. The member index is increased by sizeof(%s)', self.c_type)
- _h(' */')
- _c('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** void %s', self.c_next_name)
- _hc(' ** ')
- _hc(' ** @param %s *i', self.c_iterator_type)
- _hc(' ** @returns void')
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('void')
- _h('%s (%s *i /**< */);', self.c_next_name, self.c_iterator_type)
- _c('%s (%s *i /**< */)', self.c_next_name, self.c_iterator_type)
- _c('{')
-
- if not self.fixed_size():
- _c(' %s *R = i->data;', self.c_type)
-
- if self.is_union:
- # FIXME - how to determine the size of a variable size union??
- _c(' /* FIXME - determine the size of the union %s */', self.c_type)
- else:
- if self.need_sizeof:
- _c(' xcb_generic_iterator_t child;')
- _c(' child.data = (%s *)(((char *)R) + %s(R));',
- self.c_type, self.c_sizeof_name)
- _c(' i->index = (char *) child.data - (char *) i->data;')
- else:
- _c(' xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
- _c(' i->index = child.index;')
- _c(' --i->rem;')
- _c(' i->data = (%s *) child.data;', self.c_type)
-
- else:
- _c(' --i->rem;')
- _c(' ++i->data;')
- _c(' i->index += sizeof(%s);', self.c_type)
-
- _c('}')
-
- _h('')
- _h('/**')
- _h(' * Return the iterator pointing to the last element')
- _h(' * @param i An %s', self.c_iterator_type)
- _h(' * @return The iterator pointing to the last element')
- _h(' *')
- _h(' * Set the current element in the iterator to the last element.')
- _h(' * The member rem is set to 0. The member data points to the')
- _h(' * last element.')
- _h(' */')
- _c('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** xcb_generic_iterator_t %s', self.c_end_name)
- _hc(' ** ')
- _hc(' ** @param %s i', self.c_iterator_type)
- _hc(' ** @returns xcb_generic_iterator_t')
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('xcb_generic_iterator_t')
- _h('%s (%s i /**< */);', self.c_end_name, self.c_iterator_type)
- _c('%s (%s i /**< */)', self.c_end_name, self.c_iterator_type)
- _c('{')
- _c(' xcb_generic_iterator_t ret;')
-
- if self.fixed_size():
- _c(' ret.data = i.data + i.rem;')
- _c(' ret.index = i.index + ((char *) ret.data - (char *) i.data);')
- _c(' ret.rem = 0;')
- else:
- _c(' while(i.rem > 0)')
- _c(' %s(&i);', self.c_next_name)
- _c(' ret.data = i.data;')
- _c(' ret.rem = i.rem;')
- _c(' ret.index = i.index;')
-
- _c(' return ret;')
- _c('}')
-
-def _c_accessor_get_length(expr, field_mapping=None):
- '''
- Figures out what C code is needed to get a length field.
- The field_mapping parameter can be used to change the absolute name of a length field.
- For fields that follow a variable-length field, use the accessor.
- Otherwise, just reference the structure field directly.
- '''
-
- lenfield_name = expr.lenfield_name
- if lenfield_name is not None:
- if field_mapping is not None:
- lenfield_name = field_mapping[lenfield_name][0]
-
- if expr.lenfield is not None and expr.lenfield.prev_varsized_field is not None:
- # special case: variable and fixed size fields are intermixed
- # if the lenfield is among the fixed size fields, there is no need
- # to call a special accessor function like <expr.lenfield.c_accessor_name + '(' + prefix + ')'>
- return field_mapping(expr.lenfield_name)
- elif expr.lenfield_name is not None:
- return lenfield_name
- else:
- return str(expr.nmemb)
-
-def _c_accessor_get_expr(expr, field_mapping):
- '''
- Figures out what C code is needed to get the length of a list field.
- The field_mapping parameter can be used to change the absolute name of a length field.
- Recurses for math operations.
- Returns bitcount for value-mask fields.
- Otherwise, uses the value of the length field.
- '''
- lenexp = _c_accessor_get_length(expr, field_mapping)
-
- if expr.op == '~':
- return '(' + '~' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
- elif expr.op == 'popcount':
- return 'xcb_popcount(' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
- elif expr.op == 'enumref':
- enum_name = expr.lenfield_type.name
- constant_name = expr.lenfield_name
- c_name = _n(enum_name + (constant_name,)).upper()
- return c_name
- elif expr.op == 'sumof':
- # locate the referenced list object
- list_obj = expr.lenfield_type
- field = None
- for f in expr.lenfield_parent.fields:
- if f.field_name == expr.lenfield_name:
- field = f
- break
-
- if field is None:
- raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
- list_name = field_mapping[field.c_field_name][0]
- c_length_func = "%s(%s)" % (field.c_length_name, list_name)
- # note: xcb_sumof() has only been defined for integers
- c_length_func = _c_accessor_get_expr(field.type.expr, field_mapping)
- return 'xcb_sumof(%s, %s)' % (list_name, c_length_func)
- elif expr.op != None:
- return ('(' + _c_accessor_get_expr(expr.lhs, field_mapping) +
- ' ' + expr.op + ' ' +
- _c_accessor_get_expr(expr.rhs, field_mapping) + ')')
- elif expr.bitfield:
- return 'xcb_popcount(' + lenexp + ')'
- else:
- return lenexp
-
-def _c_accessors_field(self, field):
- '''
- Declares the accessor functions for a non-list field that follows a variable-length field.
- '''
- c_type = self.c_type
-
- # special case: switch
- switch_obj = self if self.is_switch else None
- if self.is_bitcase:
- switch_obj = self.parents[-1]
- if switch_obj is not None:
- c_type = switch_obj.c_type
-
- if field.type.is_simple:
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' ** ')
- _hc(' ** %s %s', field.c_field_type, field.c_accessor_name)
- _hc(' ** ')
- _hc(' ** @param const %s *R', c_type)
- _hc(' ** @returns %s', field.c_field_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('%s', field.c_field_type)
- _h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
- _c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
- _c('{')
- if field.prev_varsized_field is None:
- _c(' return (%s *) (R + 1);', field.c_field_type)
- else:
- _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
- sizeoftype='char' if field.first_field_after_varsized.type.c_type == 'void' else field.first_field_after_varsized.type.c_type
- _c(' return * (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, sizeoftype, field.prev_varsized_offset)
- _c('}')
- else:
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
- _hc(' ** ')
- _hc(' ** @param const %s *R', c_type)
- _hc(' ** @returns %s *', field.c_field_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- if field.type.is_switch and switch_obj is None:
- return_type = 'void *'
- else:
- return_type = '%s *' % field.c_field_type
-
- _hc(return_type)
- _h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
- _c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
- _c('{')
- if field.prev_varsized_field is None:
- _c(' return (%s) (R + 1);', return_type)
- # note: the special case 'variable fields followed by fixed size fields'
- # is not of any consequence here, since the ordering gets
- # 'corrected' in the reply function
- else:
- _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
- sizeoftype='char' if field.first_field_after_varsized.type.c_type == 'void' else field.first_field_after_varsized.type.c_type
- _c(' return (%s) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', return_type, sizeoftype, field.prev_varsized_offset)
- _c('}')
-
-
-def _c_accessors_list(self, field):
- '''
- Declares the accessor functions for a list field.
- Declares a direct-accessor function only if the list members are fixed size.
- Declares length and get-iterator functions always.
- '''
- list = field.type
- c_type = self.c_type
-
- # special case: switch
- # in case of switch, 2 params have to be supplied to certain accessor functions:
- # 1. the anchestor object (request or reply)
- # 2. the (anchestor) switch object
- # the reason is that switch is either a child of a request/reply or nested in another switch,
- # so whenever we need to access a length field, we might need to refer to some anchestor type
- switch_obj = self if self.is_switch else None
- if self.is_bitcase:
- switch_obj = self.parents[-1]
- if switch_obj is not None:
- c_type = switch_obj.c_type
-
- params = []
- fields = {}
- parents = self.parents if hasattr(self, 'parents') else [self]
- # 'R': parents[0] is always the 'toplevel' container type
- params.append(('const %s *R' % parents[0].c_type, parents[0]))
- fields.update(_c_helper_field_mapping(parents[0], [('R', '->', parents[0])], flat=True))
- # auxiliary object for 'R' parameters
- R_obj = parents[0]
-
- if switch_obj is not None:
- # now look where the fields are defined that are needed to evaluate
- # the switch expr, and store the parent objects in accessor_params and
- # the fields in switch_fields
-
- # 'S': name for the 'toplevel' switch
- toplevel_switch = parents[1]
- params.append(('const %s *S' % toplevel_switch.c_type, toplevel_switch))
- fields.update(_c_helper_field_mapping(toplevel_switch, [('S', '->', toplevel_switch)], flat=True))
-
- # initialize prefix for everything "below" S
- prefix_str = '/* %s */ S' % toplevel_switch.name[-1]
- prefix = [(prefix_str, '->', toplevel_switch)]
-
- # look for fields in the remaining containers
- for p in parents[2:] + [self]:
- # the separator between parent and child is always '.' here,
- # because of nested switch statements
- if not p.is_bitcase or (p.is_bitcase and p.has_name):
- prefix.append((p.name[-1], '.', p))
- fields.update(_c_helper_field_mapping(p, prefix, flat=True))
-
- # auxiliary object for 'S' parameter
- S_obj = parents[1]
-
- _h_setlevel(1)
- _c_setlevel(1)
- if list.member.fixed_size():
- idx = 1 if switch_obj is not None else 0
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
- _hc(' ** ')
- _hc(' ** @param %s', params[idx][0])
- _hc(' ** @returns %s *', field.c_field_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('%s *', field.c_field_type)
-
- _h('%s (%s /**< */);', field.c_accessor_name, params[idx][0])
- _c('%s (%s /**< */)', field.c_accessor_name, params[idx][0])
-
- _c('{')
- if switch_obj is not None:
- _c(' return %s;', fields[field.c_field_name][0])
- elif field.prev_varsized_field is None:
- _c(' return (%s *) (R + 1);', field.c_field_type)
- else:
- _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
- sizeoftype='char' if field.first_field_after_varsized.type.c_type == 'void' else field.first_field_after_varsized.type.c_type
- _c(' return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, sizeoftype, field.prev_varsized_offset)
- _c('}')
-
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** int %s', field.c_length_name)
- _hc(' ** ')
- _hc(' ** @param const %s *R', c_type)
- _hc(' ** @returns int')
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('int')
- if switch_obj is not None:
- _hc('%s (const %s *R /**< */,', field.c_length_name, R_obj.c_type)
- spacing = ' '*(len(field.c_length_name)+2)
- _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
- _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
- length = _c_accessor_get_expr(field.type.expr, fields)
- else:
- _h('%s (const %s *R /**< */);', field.c_length_name, c_type)
- _c('%s (const %s *R /**< */)', field.c_length_name, c_type)
- length = _c_accessor_get_expr(field.type.expr, fields)
- _c('{')
- _c(' return %s;', length)
- _c('}')
-
- if field.type.member.is_simple:
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** xcb_generic_iterator_t %s', field.c_end_name)
- _hc(' ** ')
- _hc(' ** @param const %s *R', c_type)
- _hc(' ** @returns xcb_generic_iterator_t')
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('xcb_generic_iterator_t')
- if switch_obj is not None:
- _hc('%s (const %s *R /**< */,', field.c_end_name, R_obj.c_type)
- spacing = ' '*(len(field.c_end_name)+2)
- _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
- _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
- else:
- _h('%s (const %s *R /**< */);', field.c_end_name, c_type)
- _c('%s (const %s *R /**< */)', field.c_end_name, c_type)
- _c('{')
- _c(' xcb_generic_iterator_t i;')
-
- param = 'R' if switch_obj is None else 'S'
- if switch_obj is not None:
- _c(' i.data = %s + %s;', fields[field.c_field_name][0],
- _c_accessor_get_expr(field.type.expr, fields))
- elif field.prev_varsized_field == None:
- _c(' i.data = ((%s *) (R + 1)) + (%s);', field.type.c_wiretype,
- _c_accessor_get_expr(field.type.expr, fields))
- else:
- _c(' xcb_generic_iterator_t child = %s;',
- _c_iterator_get_end(field.prev_varsized_field, 'R'))
- _c(' i.data = ((%s *) child.data) + (%s);', field.type.c_wiretype,
- _c_accessor_get_expr(field.type.expr, fields))
-
- _c(' i.rem = 0;')
- _c(' i.index = (char *) i.data - (char *) %s;', param)
- _c(' return i;')
- _c('}')
-
- else:
- _hc('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** %s %s', field.c_iterator_type, field.c_iterator_name)
- _hc(' ** ')
- _hc(' ** @param const %s *R', c_type)
- _hc(' ** @returns %s', field.c_iterator_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
-
- _hc('%s', field.c_iterator_type)
- if switch_obj is not None:
- _hc('%s (const %s *R /**< */,', field.c_iterator_name, R_obj.c_type)
- spacing = ' '*(len(field.c_iterator_name)+2)
- _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
- _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
- else:
- _h('%s (const %s *R /**< */);', field.c_iterator_name, c_type)
- _c('%s (const %s *R /**< */)', field.c_iterator_name, c_type)
- _c('{')
- _c(' %s i;', field.c_iterator_type)
-
- if switch_obj is not None:
- _c(' i.data = %s;', fields[field.c_field_name][0])
- _c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
- elif field.prev_varsized_field == None:
- _c(' i.data = (%s *) (R + 1);', field.c_field_type)
- else:
- _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
- sizeoftype='char' if field.c_field_type == 'void' else field.c_field_type
- _c(' i.data = (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index));', field.c_field_type, sizeoftype)
- if switch_obj is None:
- _c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
- _c(' i.index = (char *) i.data - (char *) %s;', 'R' if switch_obj is None else 'S' )
- _c(' return i;')
- _c('}')
-
-def _c_accessors(self, name, base):
- '''
- Declares the accessor functions for the fields of a structure.
- '''
- # no accessors for switch itself -
- # switch always needs to be unpacked explicitly
-# if self.is_switch:
-# pass
-# else:
- if True:
- for field in self.fields:
- if field.type.is_list and not field.type.fixed_size():
- _c_accessors_list(self, field)
- elif field.prev_varsized_field is not None or not field.type.fixed_size():
- _c_accessors_field(self, field)
-
-def c_simple(self, name):
- '''
- Exported function that handles cardinal type declarations.
- These are types which are typedef'd to one of the CARDx's, char, float, etc.
- '''
- _c_type_setup(self, name, ())
-
- if (self.name != name):
- # Typedef
- _h_setlevel(0)
- my_name = _t(name)
- _h('')
- _h('typedef %s %s;', _t(self.name), my_name)
-
- # Iterator
- _c_iterator(self, name)
-
-def _c_complex(self):
- '''
- Helper function for handling all structure types.
- Called for all structs, requests, replies, events, errors.
- '''
- _h_setlevel(0)
- _h('')
- _h('/**')
- _h(' * @brief %s', self.c_type)
- _h(' **/')
- _h('typedef %s %s {', self.c_container, self.c_type)
-
- struct_fields = []
- maxtypelen = 0
-
- varfield = None
- for field in self.fields:
- if not field.type.fixed_size() and not self.is_switch and not self.is_union:
- varfield = field.c_field_name
- continue
- if field.wire:
- struct_fields.append(field)
-
- for field in struct_fields:
- length = len(field.c_field_type)
- # account for '*' pointer_spec
- if not field.type.fixed_size():
- length += 1
- maxtypelen = max(maxtypelen, length)
-
- def _c_complex_field(self, field, space=''):
- if (field.type.fixed_size() or
- # in case of switch with switch children, don't make the field a pointer
- # necessary for unserialize to work
- (self.is_switch and field.type.is_switch)):
- spacing = ' ' * (maxtypelen - len(field.c_field_type))
- _h('%s %s%s %s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
- else:
- spacing = ' ' * (maxtypelen - (len(field.c_field_type) + 1))
- _h('%s %s%s *%s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
-
- if not self.is_switch:
- for field in struct_fields:
- _c_complex_field(self, field)
- else:
- for b in self.bitcases:
- space = ''
- if b.type.has_name:
- _h(' struct _%s {', b.c_field_name)
- space = ' '
- for field in b.type.fields:
- _c_complex_field(self, field, space)
- if b.type.has_name:
- _h(' } %s;', b.c_field_name)
-
- _h('} %s;', self.c_type)
-
-def c_struct(self, name):
- '''
- Exported function that handles structure declarations.
- '''
- _c_type_setup(self, name, ())
- _c_complex(self)
- _c_accessors(self, name, name)
- _c_iterator(self, name)
-
-def c_union(self, name):
- '''
- Exported function that handles union declarations.
- '''
- _c_type_setup(self, name, ())
- _c_complex(self)
- _c_iterator(self, name)
-
-def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
- '''
- Declares a request function.
- '''
-
- # Four stunningly confusing possibilities here:
- #
- # Void Non-void
- # ------------------------------
- # "req" "req"
- # 0 flag CHECKED flag Normal Mode
- # void_cookie req_cookie
- # ------------------------------
- # "req_checked" "req_unchecked"
- # CHECKED flag 0 flag Abnormal Mode
- # void_cookie req_cookie
- # ------------------------------
-
-
- # Whether we are _checked or _unchecked
- checked = void and not regular
- unchecked = not void and not regular
-
- # What kind of cookie we return
- func_cookie = 'xcb_void_cookie_t' if void else self.c_cookie_type
-
- # What flag is passed to xcb_request
- func_flags = '0' if (void and regular) or (not void and not regular) else 'XCB_REQUEST_CHECKED'
-
- # Global extension id variable or NULL for xproto
- func_ext_global = '&' + _ns.c_ext_global_name if _ns.is_ext else '0'
-
- # What our function name is
- func_name = self.c_request_name if not aux else self.c_aux_name
- if checked:
- func_name = self.c_checked_name if not aux else self.c_aux_checked_name
- if unchecked:
- func_name = self.c_unchecked_name if not aux else self.c_aux_unchecked_name
-
- param_fields = []
- wire_fields = []
- maxtypelen = len('xcb_connection_t')
- serial_fields = []
- # special case: list with variable size elements
- list_with_var_size_elems = False
-
- for field in self.fields:
- if field.visible:
- # The field should appear as a call parameter
- param_fields.append(field)
- if field.wire and not field.auto:
- # We need to set the field up in the structure
- wire_fields.append(field)
- if field.type.need_serialize or field.type.need_sizeof:
- serial_fields.append(field)
-
- for field in param_fields:
- c_field_const_type = field.c_field_const_type
- if field.type.need_serialize and not aux:
- c_field_const_type = "const void"
- if len(c_field_const_type) > maxtypelen:
- maxtypelen = len(c_field_const_type)
- if field.type.is_list and not field.type.member.fixed_size():
- list_with_var_size_elems = True
-
- _h_setlevel(1)
- _c_setlevel(1)
- _h('')
- _h('/**')
- _h(' * Delivers a request to the X server')
- _h(' * @param c The connection')
- _h(' * @return A cookie')
- _h(' *')
- _h(' * Delivers a request to the X server.')
- _h(' * ')
- if checked:
- _h(' * This form can be used only if the request will not cause')
- _h(' * a reply to be generated. Any returned error will be')
- _h(' * saved for handling by xcb_request_check().')
- if unchecked:
- _h(' * This form can be used only if the request will cause')
- _h(' * a reply to be generated. Any returned error will be')
- _h(' * placed in the event queue.')
- _h(' */')
- _c('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** %s %s', cookie_type, func_name)
- _hc(' ** ')
-
- spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
- _hc(' ** @param xcb_connection_t%s *c', spacing)
-
- for field in param_fields:
- c_field_const_type = field.c_field_const_type
- if field.type.need_serialize and not aux:
- c_field_const_type = "const void"
- spacing = ' ' * (maxtypelen - len(c_field_const_type))
- _hc(' ** @param %s%s %s%s', c_field_const_type, spacing, field.c_pointer, field.c_field_name)
-
- _hc(' ** @returns %s', cookie_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('%s', cookie_type)
-
- spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
- comma = ',' if len(param_fields) else ');'
- _h('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
- comma = ',' if len(param_fields) else ')'
- _c('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
-
- func_spacing = ' ' * (len(func_name) + 2)
- count = len(param_fields)
- for field in param_fields:
- count = count - 1
- c_field_const_type = field.c_field_const_type
- c_pointer = field.c_pointer
- if field.type.need_serialize and not aux:
- c_field_const_type = "const void"
- c_pointer = '*'
- spacing = ' ' * (maxtypelen - len(c_field_const_type))
- comma = ',' if count else ');'
- _h('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
- spacing, c_pointer, field.c_field_name, comma)
- comma = ',' if count else ')'
- _c('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
- spacing, c_pointer, field.c_field_name, comma)
-
- count = 2
- if not self.var_followed_by_fixed_fields:
- for field in param_fields:
- if not field.type.fixed_size():
- count = count + 2
- if field.type.need_serialize:
- # _serialize() keeps track of padding automatically
- count -= 1
- dimension = count + 2
-
- _c('{')
- _c(' static const xcb_protocol_request_t xcb_req = {')
- _c(' /* count */ %d,', count)
- _c(' /* ext */ %s,', func_ext_global)
- _c(' /* opcode */ %s,', self.c_request_name.upper())
- _c(' /* isvoid */ %d', 1 if void else 0)
- _c(' };')
- _c(' ')
-
- _c(' struct iovec xcb_parts[%d];', dimension)
- _c(' %s xcb_ret;', func_cookie)
- _c(' %s xcb_out;', self.c_type)
- if self.var_followed_by_fixed_fields:
- _c(' /* in the protocol description, variable size fields are followed by fixed size fields */')
- _c(' void *xcb_aux = 0;')
-
-
- for idx, f in enumerate(serial_fields):
- if aux:
- _c(' void *xcb_aux%d = 0;' % (idx))
- if list_with_var_size_elems:
- _c(' unsigned int i;')
- _c(' unsigned int xcb_tmp_len;')
- _c(' char *xcb_tmp;')
- _c(' ')
- # simple request call tracing
-# _c(' printf("in function %s\\n");' % func_name)
-
- # fixed size fields
- for field in wire_fields:
- if field.type.fixed_size():
- if field.type.is_expr:
- _c(' xcb_out.%s = %s;', field.c_field_name, _c_accessor_get_expr(field.type.expr, None))
- elif field.type.is_pad:
- if field.type.nmemb == 1:
- _c(' xcb_out.%s = 0;', field.c_field_name)
- else:
- _c(' memset(xcb_out.%s, 0, %d);', field.c_field_name, field.type.nmemb)
- else:
- if field.type.nmemb == 1:
- _c(' xcb_out.%s = %s;', field.c_field_name, field.c_field_name)
- else:
- _c(' memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)
-
- def get_serialize_args(type_obj, c_field_name, aux_var, context='serialize'):
- serialize_args = get_serialize_params(context, type_obj,
- c_field_name,
- aux_var)[2]
- return reduce(lambda x,y: "%s, %s" % (x,y), [a[2] for a in serialize_args])
-
- # calls in order to free dyn. all. memory
- free_calls = []
-
- _c(' ')
- if not self.var_followed_by_fixed_fields:
- _c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
- _c(' xcb_parts[2].iov_len = sizeof(xcb_out);')
- _c(' xcb_parts[3].iov_base = 0;')
- _c(' xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;')
-
- count = 4
-
- for field in param_fields:
- if not field.type.fixed_size():
- _c(' /* %s %s */', field.type.c_type, field.c_field_name)
- # default: simple cast to char *
- if not field.type.need_serialize and not field.type.need_sizeof:
- _c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
- if field.type.is_list:
- if field.type.member.fixed_size():
- _c(' xcb_parts[%d].iov_len = %s * sizeof(%s);', count,
- _c_accessor_get_expr(field.type.expr, None),
- field.type.member.c_wiretype)
- else:
- list_length = _c_accessor_get_expr(field.type.expr, None)
-
- length = ''
- _c(" xcb_parts[%d].iov_len = 0;" % count)
- _c(" xcb_tmp = (char *)%s;", field.c_field_name)
- _c(" for(i=0; i<%s; i++) {" % list_length)
- _c(" xcb_tmp_len = %s(xcb_tmp);" %
- (field.type.c_sizeof_name))
- _c(" xcb_parts[%d].iov_len += xcb_tmp_len;" % count)
- _c(" xcb_tmp += xcb_tmp_len;")
- _c(" }")
- else:
- # not supposed to happen
- raise Exception("unhandled variable size field %s" % field.c_field_name)
- else:
- if not aux:
- _c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
- idx = serial_fields.index(field)
- aux_var = '&xcb_aux%d' % idx
- context = 'serialize' if aux else 'sizeof'
- _c(' xcb_parts[%d].iov_len = ', count)
- if aux:
- serialize_args = get_serialize_args(field.type, aux_var, field.c_field_name, context)
- _c(' %s (%s);', field.type.c_serialize_name, serialize_args)
- _c(' xcb_parts[%d].iov_base = xcb_aux%d;' % (count, idx))
- free_calls.append(' free(xcb_aux%d);' % idx)
- else:
- serialize_args = get_serialize_args(field.type, field.c_field_name, aux_var, context)
- func_name = field.type.c_sizeof_name
- _c(' %s (%s);', func_name, serialize_args)
-
- count += 1
- if not (field.type.need_serialize or field.type.need_sizeof):
- # the _serialize() function keeps track of padding automatically
- _c(' xcb_parts[%d].iov_base = 0;', count)
- _c(' xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count, count-1)
- count += 1
-
- # elif self.var_followed_by_fixed_fields:
- else:
- _c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
- # request header: opcodes + length
- _c(' xcb_parts[2].iov_len = 2*sizeof(uint8_t) + sizeof(uint16_t);')
- count += 1
- # call _serialize()
- buffer_var = '&xcb_aux'
- serialize_args = get_serialize_args(self, buffer_var, '&xcb_out', 'serialize')
- _c(' xcb_parts[%d].iov_len = %s (%s);', count, self.c_serialize_name, serialize_args)
- _c(' xcb_parts[%d].iov_base = (char *) xcb_aux;', count)
- free_calls.append(' free(xcb_aux);')
- # no padding necessary - _serialize() keeps track of padding automatically
-
- _c(' ')
- _c(' xcb_ret.sequence = xcb_send_request(c, %s, xcb_parts + 2, &xcb_req);', func_flags)
-
- # free dyn. all. data, if any
- for f in free_calls:
- _c(f)
- _c(' return xcb_ret;')
- _c('}')
-
-def _c_reply(self, name):
- '''
- Declares the function that returns the reply structure.
- '''
- spacing1 = ' ' * (len(self.c_cookie_type) - len('xcb_connection_t'))
- spacing2 = ' ' * (len(self.c_cookie_type) - len('xcb_generic_error_t'))
- spacing3 = ' ' * (len(self.c_reply_name) + 2)
-
- # check if _unserialize() has to be called for any field
- def look_for_special_cases(complex_obj):
- unserialize_fields = []
- # no unserialize call in case of switch
- if not complex_obj.is_switch:
- for field in complex_obj.fields:
- # three cases: 1. field with special case
- # 2. container that contains special case field
- # 3. list with special case elements
- if field.type.var_followed_by_fixed_fields:
- unserialize_fields.append(field)
- elif field.type.is_container:
- unserialize_fields += look_for_special_cases(field.type)
- elif field.type.is_list:
- if field.type.member.var_followed_by_fixed_fields:
- unserialize_fields.append(field)
- if field.type.member.is_container:
- unserialize_fields += look_for_special_cases(field.type.member)
- return unserialize_fields
-
- unserialize_fields = look_for_special_cases(self.reply)
-
- _h('')
- _h('/**')
- _h(' * Return the reply')
- _h(' * @param c The connection')
- _h(' * @param cookie The cookie')
- _h(' * @param e The xcb_generic_error_t supplied')
- _h(' *')
- _h(' * Returns the reply of the request asked by')
- _h(' * ')
- _h(' * The parameter @p e supplied to this function must be NULL if')
- _h(' * %s(). is used.', self.c_unchecked_name)
- _h(' * Otherwise, it stores the error if any.')
- _h(' *')
- _h(' * The returned value must be freed by the caller using free().')
- _h(' */')
- _c('')
- _hc('')
- _hc('/*****************************************************************************')
- _hc(' **')
- _hc(' ** %s * %s', self.c_reply_type, self.c_reply_name)
- _hc(' ** ')
- _hc(' ** @param xcb_connection_t%s *c', spacing1)
- _hc(' ** @param %s cookie', self.c_cookie_type)
- _hc(' ** @param xcb_generic_error_t%s **e', spacing2)
- _hc(' ** @returns %s *', self.c_reply_type)
- _hc(' **')
- _hc(' *****************************************************************************/')
- _hc(' ')
- _hc('%s *', self.c_reply_type)
- _hc('%s (xcb_connection_t%s *c /**< */,', self.c_reply_name, spacing1)
- _hc('%s%s cookie /**< */,', spacing3, self.c_cookie_type)
- _h('%sxcb_generic_error_t%s **e /**< */);', spacing3, spacing2)
- _c('%sxcb_generic_error_t%s **e /**< */)', spacing3, spacing2)
- _c('{')
-
- if len(unserialize_fields)>0:
- # certain variable size fields need to be unserialized explicitly
- _c(' %s *reply = (%s *) xcb_wait_for_reply(c, cookie.sequence, e);',
- self.c_reply_type, self.c_reply_type)
- _c(' int i;')
- for field in unserialize_fields:
- if field.type.is_list:
- _c(' %s %s_iter = %s(reply);', field.c_iterator_type, field.c_field_name, field.c_iterator_name)
- _c(' int %s_len = %s(reply);', field.c_field_name, field.c_length_name)
- _c(' %s *%s_data;', field.c_field_type, field.c_field_name)
- else:
- raise Exception('not implemented: call _unserialize() in reply for non-list type %s', field.c_field_type)
- # call _unserialize(), using the reply as source and target buffer
- _c(' /* special cases: transform parts of the reply to match XCB data structures */')
- for field in unserialize_fields:
- if field.type.is_list:
- _c(' for(i=0; i<%s_len; i++) {', field.c_field_name)
- _c(' %s_data = %s_iter.data;', field.c_field_name, field.c_field_name)
- _c(' %s((const void *)%s_data, &%s_data);', field.type.c_unserialize_name,
- field.c_field_name, field.c_field_name)
- _c(' %s(&%s_iter);', field.type.c_next_name, field.c_field_name)
- _c(' }')
- # return the transformed reply
- _c(' return reply;')
-
- else:
- _c(' return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)
-
- _c('}')
-
-def _c_opcode(name, opcode):
- '''
- Declares the opcode define for requests, events, and errors.
- '''
- _h_setlevel(0)
- _h('')
- _h('/** Opcode for %s. */', _n(name))
- _h('#define %s %s', _n(name).upper(), opcode)
-
-def _c_cookie(self, name):
- '''
- Declares the cookie type for a non-void request.
- '''
- _h_setlevel(0)
- _h('')
- _h('/**')
- _h(' * @brief %s', self.c_cookie_type)
- _h(' **/')
- _h('typedef struct %s {', self.c_cookie_type)
- _h(' unsigned int sequence; /**< */')
- _h('} %s;', self.c_cookie_type)
-
-def c_request(self, name):
- '''
- Exported function that handles request declarations.
- '''
- _c_type_setup(self, name, ('request',))
-
- if self.reply:
- # Cookie type declaration
- _c_cookie(self, name)
-
- # Opcode define
- _c_opcode(name, self.opcode)
-
- # Request structure declaration
- _c_complex(self)
-
- if self.reply:
- _c_type_setup(self.reply, name, ('reply',))
- # Reply structure definition
- _c_complex(self.reply)
- # Request prototypes
- _c_request_helper(self, name, self.c_cookie_type, False, True)
- _c_request_helper(self, name, self.c_cookie_type, False, False)
- if self.need_aux:
- _c_request_helper(self, name, self.c_cookie_type, False, True, True)
- _c_request_helper(self, name, self.c_cookie_type, False, False, True)
- # Reply accessors
- _c_accessors(self.reply, name + ('reply',), name)
- _c_reply(self, name)
- else:
- # Request prototypes
- _c_request_helper(self, name, 'xcb_void_cookie_t', True, False)
- _c_request_helper(self, name, 'xcb_void_cookie_t', True, True)
- if self.need_aux:
- _c_request_helper(self, name, 'xcb_void_cookie_t', True, False, True)
- _c_request_helper(self, name, 'xcb_void_cookie_t', True, True, True)
-
-
-def c_event(self, name):
- '''
- Exported function that handles event declarations.
- '''
- _c_type_setup(self, name, ('event',))
-
- # Opcode define
- _c_opcode(name, self.opcodes[name])
-
- if self.name == name:
- # Structure definition
- _c_complex(self)
- else:
- # Typedef
- _h('')
- _h('typedef %s %s;', _t(self.name + ('event',)), _t(name + ('event',)))
-
-def c_error(self, name):
- '''
- Exported function that handles error declarations.
- '''
- _c_type_setup(self, name, ('error',))
-
- # Opcode define
- _c_opcode(name, self.opcodes[name])
-
- if self.name == name:
- # Structure definition
- _c_complex(self)
- else:
- # Typedef
- _h('')
- _h('typedef %s %s;', _t(self.name + ('error',)), _t(name + ('error',)))
-
-
-# Main routine starts here
-
-# Must create an "output" dictionary before any xcbgen imports.
-output = {'open' : c_open,
- 'close' : c_close,
- 'simple' : c_simple,
- 'enum' : c_enum,
- 'struct' : c_struct,
- 'union' : c_union,
- 'request' : c_request,
- 'event' : c_event,
- 'error' : c_error,
- }
-
-# Boilerplate below this point
-
-# Check for the argument that specifies path to the xcbgen python package.
-try:
- opts, args = getopt.getopt(sys.argv[1:], 'p:')
-except getopt.GetoptError, err:
- print str(err)
- print 'Usage: c_client.py [-p path] file.xml'
- sys.exit(1)
-
-for (opt, arg) in opts:
- if opt == '-p':
- sys.path.append(arg)
-
-# Import the module class
-try:
- from xcbgen.state import Module
-except ImportError:
- print ''
- print 'Failed to load the xcbgen Python package!'
- print 'Make sure that xcb/proto installed it on your Python path.'
- print 'If not, you will need to create a .pth file or define $PYTHONPATH'
- print 'to extend the path.'
- print 'Refer to the README file in xcb/proto for more info.'
- print ''
- raise
-
-# Parse the xml header
-module = Module(args[0], output)
-
-# Build type-registry and resolve type dependencies
-module.register()
-module.resolve()
-
-# Output the code
-module.generate()
+#!/usr/bin/env python
+from xml.etree.cElementTree import *
+from os.path import basename
+import getopt
+import sys
+import re
+
+# Jump to the bottom of this file for the main routine
+
+# Some hacks to make the API more readable, and to keep backwards compability
+_cname_re = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')
+_cname_special_cases = {'DECnet':'decnet'}
+
+_extension_special_cases = ['XPrint', 'XCMisc', 'BigRequests']
+
+_cplusplus_annoyances = {'class' : '_class',
+ 'new' : '_new',
+ 'delete': '_delete'}
+_c_keywords = {'default' : '_default'}
+
+_hlines = []
+_hlevel = 0
+_clines = []
+_clevel = 0
+_ns = None
+
+# global variable to keep track of serializers and
+# switch data types due to weird dependencies
+finished_serializers = []
+finished_sizeof = []
+finished_switch = []
+
+def _h(fmt, *args):
+ '''
+ Writes the given line to the header file.
+ '''
+ _hlines[_hlevel].append(fmt % args)
+
+def _c(fmt, *args):
+ '''
+ Writes the given line to the source file.
+ '''
+ _clines[_clevel].append(fmt % args)
+
+def _hc(fmt, *args):
+ '''
+ Writes the given line to both the header and source files.
+ '''
+ _h(fmt, *args)
+ _c(fmt, *args)
+
+# XXX See if this level thing is really necessary.
+def _h_setlevel(idx):
+ '''
+ Changes the array that header lines are written to.
+ Supports writing different sections of the header file.
+ '''
+ global _hlevel
+ while len(_hlines) <= idx:
+ _hlines.append([])
+ _hlevel = idx
+
+def _c_setlevel(idx):
+ '''
+ Changes the array that source lines are written to.
+ Supports writing to different sections of the source file.
+ '''
+ global _clevel
+ while len(_clines) <= idx:
+ _clines.append([])
+ _clevel = idx
+
+def _n_item(str):
+ '''
+ Does C-name conversion on a single string fragment.
+ Uses a regexp with some hard-coded special cases.
+ '''
+ if str in _cname_special_cases:
+ return _cname_special_cases[str]
+ else:
+ split = _cname_re.finditer(str)
+ name_parts = [match.group(0) for match in split]
+ return '_'.join(name_parts)
+
+def _cpp(str):
+ '''
+ Checks for certain C++ reserved words and fixes them.
+ '''
+ if str in _cplusplus_annoyances:
+ return _cplusplus_annoyances[str]
+ elif str in _c_keywords:
+ return _c_keywords[str]
+ else:
+ return str
+
+def _ext(str):
+ '''
+ Does C-name conversion on an extension name.
+ Has some additional special cases on top of _n_item.
+ '''
+ if str in _extension_special_cases:
+ return _n_item(str).lower()
+ else:
+ return str.lower()
+
+def _n(list):
+ '''
+ Does C-name conversion on a tuple of strings.
+ Different behavior depending on length of tuple, extension/not extension, etc.
+ Basically C-name converts the individual pieces, then joins with underscores.
+ '''
+ if len(list) == 1:
+ parts = list
+ elif len(list) == 2:
+ parts = [list[0], _n_item(list[1])]
+ elif _ns.is_ext:
+ parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]]
+ else:
+ parts = [list[0]] + [_n_item(i) for i in list[1:]]
+ return '_'.join(parts).lower()
+
+def _t(list):
+ '''
+ Does C-name conversion on a tuple of strings representing a type.
+ Same as _n but adds a "_t" on the end.
+ '''
+ if len(list) == 1:
+ parts = list
+ elif len(list) == 2:
+ parts = [list[0], _n_item(list[1]), 't']
+ elif _ns.is_ext:
+ parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]] + ['t']
+ else:
+ parts = [list[0]] + [_n_item(i) for i in list[1:]] + ['t']
+ return '_'.join(parts).lower()
+
+
+def c_open(self):
+ '''
+ Exported function that handles module open.
+ Opens the files and writes out the auto-generated comment, header file includes, etc.
+ '''
+ global _ns
+ _ns = self.namespace
+ _ns.c_ext_global_name = _n(_ns.prefix + ('id',))
+
+ # Build the type-name collision avoidance table used by c_enum
+ build_collision_table()
+
+ _h_setlevel(0)
+ _c_setlevel(0)
+
+ _hc('/*')
+ _hc(' * This file generated automatically from %s by c_client.py.', _ns.file)
+ _hc(' * Edit at your peril.')
+ _hc(' */')
+ _hc('')
+
+ _h('/**')
+ _h(' * @defgroup XCB_%s_API XCB %s API', _ns.ext_name, _ns.ext_name)
+ _h(' * @brief %s XCB Protocol Implementation.', _ns.ext_name)
+ _h(' * @{')
+ _h(' **/')
+ _h('')
+ _h('#ifndef __%s_H', _ns.header.upper())
+ _h('#define __%s_H', _ns.header.upper())
+ _h('')
+ _h('#include "xcb.h"')
+
+ _c('#include <stdlib.h>')
+ _c('#include <string.h>')
+ _c('#include <assert.h>')
+ _c('#include "xcbext.h"')
+ _c('#include "%s.h"', _ns.header)
+ _c('#include <X11/Xtrans/Xtrans.h>')
+
+ if _ns.is_ext:
+ for (n, h) in self.imports:
+ _hc('#include "%s.h"', h)
+
+ _h('')
+ _h('#ifdef __cplusplus')
+ _h('extern "C" {')
+ _h('#endif')
+
+ if _ns.is_ext:
+ _h('')
+ _h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)
+ _h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)
+ _h(' ') #XXX
+ _h('extern xcb_extension_t %s;', _ns.c_ext_global_name)
+
+ _c('')
+ _c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)
+
+def c_close(self):
+ '''
+ Exported function that handles module close.
+ Writes out all the stored content lines, then closes the files.
+ '''
+ _h_setlevel(2)
+ _c_setlevel(2)
+ _hc('')
+
+ _h('')
+ _h('#ifdef __cplusplus')
+ _h('}')
+ _h('#endif')
+
+ _h('')
+ _h('#endif')
+ _h('')
+ _h('/**')
+ _h(' * @}')
+ _h(' */')
+
+ # Write header file
+ hfile = open('%s.h' % _ns.header, 'w')
+ for list in _hlines:
+ for line in list:
+ hfile.write(line)
+ hfile.write('\n')
+ hfile.close()
+
+ # Write source file
+ cfile = open('%s.c' % _ns.header, 'w')
+ for list in _clines:
+ for line in list:
+ cfile.write(line)
+ cfile.write('\n')
+ cfile.close()
+
+def build_collision_table():
+ global namecount
+ namecount = {}
+
+ for v in module.types.values():
+ name = _t(v[0])
+ namecount[name] = (namecount.get(name) or 0) + 1
+
+def c_enum(self, name):
+ '''
+ Exported function that handles enum declarations.
+ '''
+
+ tname = _t(name)
+ if namecount[tname] > 1:
+ tname = _t(name + ('enum',))
+
+ _h_setlevel(0)
+ _h('')
+ _h('typedef enum %s {', tname)
+
+ count = len(self.values)
+
+ for (enam, eval) in self.values:
+ count = count - 1
+ equals = ' = ' if eval != '' else ''
+ comma = ',' if count > 0 else ''
+ _h(' %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)
+
+ _h('} %s;', tname)
+
+def _c_type_setup(self, name, postfix):
+ '''
+ Sets up all the C-related state by adding additional data fields to
+ all Field and Type objects. Here is where we figure out most of our
+ variable and function names.
+
+ Recurses into child fields and list member types.
+ '''
+ # Do all the various names in advance
+ self.c_type = _t(name + postfix)
+ self.c_wiretype = 'char' if self.c_type == 'void' else self.c_type
+
+ self.c_iterator_type = _t(name + ('iterator',))
+ self.c_next_name = _n(name + ('next',))
+ self.c_end_name = _n(name + ('end',))
+
+ self.c_request_name = _n(name)
+ self.c_checked_name = _n(name + ('checked',))
+ self.c_unchecked_name = _n(name + ('unchecked',))
+ self.c_reply_name = _n(name + ('reply',))
+ self.c_reply_type = _t(name + ('reply',))
+ self.c_cookie_type = _t(name + ('cookie',))
+
+ self.need_aux = False
+ self.need_serialize = False
+ self.need_sizeof = False
+
+ self.c_aux_name = _n(name + ('aux',))
+ self.c_aux_checked_name = _n(name + ('aux', 'checked'))
+ self.c_aux_unchecked_name = _n(name + ('aux', 'unchecked'))
+ self.c_serialize_name = _n(name + ('serialize',))
+ self.c_unserialize_name = _n(name + ('unserialize',))
+ self.c_unpack_name = _n(name + ('unpack',))
+ self.c_sizeof_name = _n(name + ('sizeof',))
+
+ # special case: structs where variable size fields are followed by fixed size fields
+ self.var_followed_by_fixed_fields = False
+
+ if self.is_switch:
+ self.need_serialize = True
+ self.c_container = 'struct'
+ for bitcase in self.bitcases:
+ bitcase.c_field_name = _cpp(bitcase.field_name)
+ bitcase_name = bitcase.field_type if bitcase.type.has_name else name
+ _c_type_setup(bitcase.type, bitcase_name, ())
+
+ elif self.is_container:
+
+ self.c_container = 'union' if self.is_union else 'struct'
+ prev_varsized_field = None
+ prev_varsized_offset = 0
+ first_field_after_varsized = None
+
+ for field in self.fields:
+ _c_type_setup(field.type, field.field_type, ())
+ if field.type.is_list:
+ _c_type_setup(field.type.member, field.field_type, ())
+ if (field.type.nmemb is None):
+ self.need_sizeof = True
+
+ field.c_field_type = _t(field.field_type)
+ field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type
+ field.c_field_name = _cpp(field.field_name)
+ field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
+ field.c_pointer = ' ' if field.type.nmemb == 1 else '*'
+
+ # correct the c_pointer field for variable size non-list types
+ if not field.type.fixed_size() and field.c_pointer == ' ':
+ field.c_pointer = '*'
+ if field.type.is_list and not field.type.member.fixed_size():
+ field.c_pointer = '*'
+
+ if field.type.is_switch:
+ field.c_pointer = '*'
+ field.c_field_const_type = 'const ' + field.c_field_type
+ self.need_aux = True
+ elif not field.type.fixed_size() and not field.type.is_bitcase:
+ self.need_sizeof = True
+
+ field.c_iterator_type = _t(field.field_type + ('iterator',)) # xcb_fieldtype_iterator_t
+ field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator
+ field.c_accessor_name = _n(name + (field.field_name,)) # xcb_container_field
+ field.c_length_name = _n(name + (field.field_name, 'length')) # xcb_container_field_length
+ field.c_end_name = _n(name + (field.field_name, 'end')) # xcb_container_field_end
+
+ field.prev_varsized_field = prev_varsized_field
+ field.prev_varsized_offset = prev_varsized_offset
+
+ if prev_varsized_offset == 0:
+ first_field_after_varsized = field
+ field.first_field_after_varsized = first_field_after_varsized
+
+ if field.type.fixed_size():
+ prev_varsized_offset += field.type.size
+ # special case: intermixed fixed and variable size fields
+ if prev_varsized_field is not None and not field.type.is_pad and field.wire:
+ if not self.is_union:
+ self.need_serialize = True
+ self.var_followed_by_fixed_fields = True
+ else:
+ self.last_varsized_field = field
+ prev_varsized_field = field
+ prev_varsized_offset = 0
+
+ if self.var_followed_by_fixed_fields:
+ if field.type.fixed_size():
+ field.prev_varsized_field = None
+
+ if self.need_serialize:
+ # when _unserialize() is wanted, create _sizeof() as well for consistency reasons
+ self.need_sizeof = True
+
+ # as switch does never appear at toplevel,
+ # continue here with type construction
+ if self.is_switch:
+ if self.c_type not in finished_switch:
+ finished_switch.append(self.c_type)
+ # special: switch C structs get pointer fields for variable-sized members
+ _c_complex(self)
+ for bitcase in self.bitcases:
+ bitcase_name = bitcase.type.name if bitcase.type.has_name else name
+ _c_accessors(bitcase.type, bitcase_name, bitcase_name)
+ # no list with switch as element, so no call to
+ # _c_iterator(field.type, field_name) necessary
+
+ if not self.is_bitcase:
+ if self.need_serialize:
+ if self.c_serialize_name not in finished_serializers:
+ finished_serializers.append(self.c_serialize_name)
+ _c_serialize('serialize', self)
+
+ # _unpack() and _unserialize() are only needed for special cases:
+ # switch -> unpack
+ # special cases -> unserialize
+ if self.is_switch or self.var_followed_by_fixed_fields:
+ _c_serialize('unserialize', self)
+
+ if self.need_sizeof:
+ if self.c_sizeof_name not in finished_sizeof:
+ if not module.namespace.is_ext or self.name[:2] == module.namespace.prefix:
+ finished_sizeof.append(self.c_sizeof_name)
+ _c_serialize('sizeof', self)
+# _c_type_setup()
+
+def _c_helper_absolute_name(prefix, field=None):
+ """
+ turn prefix, which is a list of tuples (name, separator, Type obj) into a string
+ representing a valid name in C (based on the context)
+ if field is not None, append the field name as well
+ """
+ prefix_str = ''
+ for name, sep, obj in prefix:
+ prefix_str += name
+ if '' == sep:
+ sep = '->'
+ if ((obj.is_bitcase and obj.has_name) or # named bitcase
+ (obj.is_switch and len(obj.parents)>1)):
+ sep = '.'
+ prefix_str += sep
+ if field is not None:
+ prefix_str += _cpp(field.field_name)
+ return prefix_str
+# _c_absolute_name
+
+def _c_helper_field_mapping(complex_type, prefix, flat=False):
+ """
+ generate absolute names, based on prefix, for all fields starting from complex_type
+ if flat == True, nested complex types are not taken into account
+ """
+ all_fields = {}
+ if complex_type.is_switch:
+ for b in complex_type.bitcases:
+ if b.type.has_name:
+ switch_name, switch_sep, switch_type = prefix[-1]
+ bitcase_prefix = prefix + [(b.type.name[-1], '.', b.type)]
+ else:
+ bitcase_prefix = prefix
+
+ if (True==flat and not b.type.has_name) or False==flat:
+ all_fields.update(_c_helper_field_mapping(b.type, bitcase_prefix, flat))
+ else:
+ for f in complex_type.fields:
+ fname = _c_helper_absolute_name(prefix, f)
+ if all_fields.has_key(f.field_name):
+ raise Exception("field name %s has been registered before" % f.field_name)
+
+ all_fields[f.field_name] = (fname, f)
+ if f.type.is_container and flat==False:
+ if f.type.is_bitcase and not f.type.has_name:
+ new_prefix = prefix
+ elif f.type.is_switch and len(f.type.parents)>1:
+ # nested switch gets another separator
+ new_prefix = prefix+[(f.c_field_name, '.', f.type)]
+ else:
+ new_prefix = prefix+[(f.c_field_name, '->', f.type)]
+ all_fields.update(_c_helper_field_mapping(f.type, new_prefix, flat))
+
+ return all_fields
+# _c_field_mapping()
+
+def _c_helper_resolve_field_names (prefix):
+ """
+ get field names for all objects in the prefix array
+ """
+ all_fields = {}
+ tmp_prefix = []
+ # look for fields in the remaining containers
+ for idx, p in enumerate(prefix):
+ name, sep, obj = p
+ if ''==sep:
+ # sep can be preset in prefix, if not, make a sensible guess
+ sep = '.' if (obj.is_switch or obj.is_bitcase) else '->'
+ # exception: 'toplevel' object (switch as well!) always have sep '->'
+ sep = '->' if idx<1 else sep
+ if not obj.is_bitcase or (obj.is_bitcase and obj.has_name):
+ tmp_prefix.append((name, sep, obj))
+ all_fields.update(_c_helper_field_mapping(obj, tmp_prefix, flat=True))
+
+ return all_fields
+# _c_helper_resolve_field_names
+
+def get_expr_fields(self):
+ """
+ get the Fields referenced by switch or list expression
+ """
+ def get_expr_field_names(expr):
+ if expr.op is None:
+ if expr.lenfield_name is not None:
+ return [expr.lenfield_name]
+ else:
+ # constant value expr
+ return []
+ else:
+ if expr.op == '~':
+ return get_expr_field_names(expr.rhs)
+ elif expr.op == 'popcount':
+ return get_expr_field_names(expr.rhs)
+ elif expr.op == 'sumof':
+ # sumof expr references another list,
+ # we need that list's length field here
+ field = None
+ for f in expr.lenfield_parent.fields:
+ if f.field_name == expr.lenfield_name:
+ field = f
+ break
+ if field is None:
+ raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
+ # referenced list + its length field
+ return [expr.lenfield_name] + get_expr_field_names(field.type.expr)
+ elif expr.op == 'enumref':
+ return []
+ else:
+ return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
+ # get_expr_field_names()
+
+ # resolve the field names with the parent structure(s)
+ unresolved_fields_names = get_expr_field_names(self.expr)
+
+ # construct prefix from self
+ prefix = [('', '', p) for p in self.parents]
+ if self.is_container:
+ prefix.append(('', '', self))
+
+ all_fields = _c_helper_resolve_field_names (prefix)
+ resolved_fields_names = filter(lambda x: x in all_fields.keys(), unresolved_fields_names)
+ if len(unresolved_fields_names) != len(resolved_fields_names):
+ raise Exception("could not resolve all fields for %s" % self.name)
+
+ resolved_fields = [all_fields[n][1] for n in resolved_fields_names]
+ return resolved_fields
+# get_expr_fields()
+
+def resolve_expr_fields(complex_obj):
+ """
+ find expr fields appearing in complex_obj and descendents that cannot be resolved within complex_obj
+ these are normally fields that need to be given as function parameters
+ """
+ all_fields = []
+ expr_fields = []
+ unresolved = []
+
+ for field in complex_obj.fields:
+ all_fields.append(field)
+ if field.type.is_switch or field.type.is_list:
+ expr_fields += get_expr_fields(field.type)
+ if field.type.is_container:
+ expr_fields += resolve_expr_fields(field.type)
+
+ # try to resolve expr fields
+ for e in expr_fields:
+ if e not in all_fields and e not in unresolved:
+ unresolved.append(e)
+ return unresolved
+# resolve_expr_fields()
+
+def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
+ """
+ functions like _serialize(), _unserialize(), and _unpack() sometimes need additional parameters:
+ E.g. in order to unpack switch, extra parameters might be needed to evaluate the switch
+ expression. This function tries to resolve all fields within a structure, and returns the
+ unresolved fields as the list of external parameters.
+ """
+ def add_param(params, param):
+ if param not in params:
+ params.append(param)
+
+ # collect all fields into param_fields
+ param_fields = []
+ wire_fields = []
+
+ for field in self.fields:
+ if field.visible:
+ # the field should appear as a parameter in the function call
+ param_fields.append(field)
+ if field.wire and not field.auto:
+ if field.type.fixed_size() and not self.is_switch:
+ # field in the xcb_out structure
+ wire_fields.append(field)
+ # fields like 'pad0' are skipped!
+
+ # in case of switch, parameters always contain any fields referenced in the switch expr
+ # we do not need any variable size fields here, as the switch data type contains both
+ # fixed and variable size fields
+ if self.is_switch:
+ param_fields = get_expr_fields(self)
+
+ # _serialize()/_unserialize()/_unpack() function parameters
+ # note: don't use set() for params, it is unsorted
+ params = []
+
+ # 1. the parameter for the void * buffer
+ if 'serialize' == context:
+ params.append(('void', '**', buffer_var))
+ elif context in ('unserialize', 'unpack', 'sizeof'):
+ params.append(('const void', '*', buffer_var))
+
+ # 2. any expr fields that cannot be resolved within self and descendants
+ unresolved_fields = resolve_expr_fields(self)
+ for f in unresolved_fields:
+ add_param(params, (f.c_field_type, '', f.c_field_name))
+
+ # 3. param_fields contain the fields necessary to evaluate the switch expr or any other fields
+ # that do not appear in the data type struct
+ for p in param_fields:
+ if self.is_switch:
+ typespec = p.c_field_const_type
+ pointerspec = p.c_pointer
+ add_param(params, (typespec, pointerspec, p.c_field_name))
+ else:
+ if p.visible and not p.wire and not p.auto:
+ typespec = p.c_field_type
+ pointerspec = ''
+ add_param(params, (typespec, pointerspec, p.c_field_name))
+
+ # 4. aux argument
+ if 'serialize' == context:
+ add_param(params, ('const %s' % self.c_type, '*', aux_var))
+ elif 'unserialize' == context:
+ add_param(params, ('%s' % self.c_type, '**', aux_var))
+ elif 'unpack' == context:
+ add_param(params, ('%s' % self.c_type, '*', aux_var))
+
+ # 5. switch contains all variable size fields as struct members
+ # for other data types though, these have to be supplied separately
+ # this is important for the special case of intermixed fixed and
+ # variable size fields
+ if not self.is_switch and 'serialize' == context:
+ for p in param_fields:
+ if not p.type.fixed_size():
+ add_param(params, (p.c_field_const_type, '*', p.c_field_name))
+
+ return (param_fields, wire_fields, params)
+# get_serialize_params()
+
+def _c_serialize_helper_insert_padding(context, code_lines, space, postpone):
+ code_lines.append('%s /* insert padding */' % space)
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+# code_lines.append('%s printf("automatically inserting padding: %%%%d\\n", xcb_pad);' % space)
+ code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+
+ if not postpone:
+ code_lines.append('%s if (0 != xcb_pad) {' % space)
+
+ if 'serialize' == context:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;' % space)
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_pad;' % space)
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ elif context in ('unserialize', 'unpack', 'sizeof'):
+ code_lines.append('%s xcb_tmp += xcb_pad;' % space)
+
+ code_lines.append('%s xcb_pad = 0;' % space)
+ code_lines.append('%s }' % space)
+
+ code_lines.append('%s xcb_block_len = 0;' % space)
+
+ # keep tracking of xcb_parts entries for serialize
+ return 1
+# _c_serialize_helper_insert_padding()
+
+def _c_serialize_helper_switch(context, self, complex_name,
+ code_lines, temp_vars,
+ space, prefix):
+ count = 0
+ switch_expr = _c_accessor_get_expr(self.expr, None)
+
+ for b in self.bitcases:
+ bitcase_expr = _c_accessor_get_expr(b.type.expr, None)
+ code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
+# code_lines.append(' printf("switch %s: entering bitcase section %s (mask=%%%%d)...\\n", %s);' %
+# (self.name[-1], b.type.name[-1], bitcase_expr))
+ b_prefix = prefix
+ if b.type.has_name:
+ b_prefix = prefix + [(b.c_field_name, '.', b.type)]
+
+ count += _c_serialize_helper_fields(context, b.type,
+ code_lines, temp_vars,
+ "%s " % space,
+ b_prefix,
+ is_bitcase = True)
+ code_lines.append(' }')
+
+# if 'serialize' == context:
+# count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
+# elif context in ('unserialize', 'unpack', 'sizeof'):
+# # padding
+# code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+# code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+
+ return count
+# _c_serialize_helper_switch
+
+def _c_serialize_helper_switch_field(context, self, field, c_switch_variable, prefix):
+ """
+ handle switch by calling _serialize() or _unpack(), depending on context
+ """
+ # switch is handled by this function as a special case
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+ field_mapping = _c_helper_field_mapping(self, prefix)
+ prefix_str = _c_helper_absolute_name(prefix)
+
+ # find the parameters that need to be passed to _serialize()/_unpack():
+ # all switch expr fields must be given as parameters
+ args = get_expr_fields(field.type)
+ # length fields for variable size types in switch, normally only some of need
+ # need to be passed as parameters
+ switch_len_fields = resolve_expr_fields(field.type)
+
+ # a switch field at this point _must_ be a bitcase field
+ # we require that bitcases are "self-contiguous"
+ bitcase_unresolved = resolve_expr_fields(self)
+ if len(bitcase_unresolved) != 0:
+ raise Exception('unresolved fields within bitcase is not supported at this point')
+
+ # get the C names for the parameters
+ c_field_names = ''
+ for a in switch_len_fields:
+ c_field_names += "%s, " % field_mapping[a.c_field_name][0]
+ for a in args:
+ c_field_names += "%s, " % field_mapping[a.c_field_name][0]
+
+ # call _serialize()/_unpack() to determine the actual size
+ if 'serialize' == context:
+ length = "%s(&%s, %s&%s%s)" % (field.type.c_serialize_name, c_switch_variable,
+ c_field_names, prefix_str, field.c_field_name)
+ elif context in ('unserialize', 'unpack'):
+ length = "%s(xcb_tmp, %s&%s%s)" % (field.type.c_unpack_name,
+ c_field_names, prefix_str, field.c_field_name)
+
+ return length
+# _c_serialize_helper_switch_field()
+
+def _c_serialize_helper_list_field(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ """
+ helper function to cope with lists of variable length
+ """
+ expr = field.type.expr
+ prefix_str = _c_helper_absolute_name(prefix)
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+ param_names = [p[2] for p in params]
+
+ expr_fields_names = [f.field_name for f in get_expr_fields(field.type)]
+ resolved = filter(lambda x: x in param_names, expr_fields_names)
+ unresolved = filter(lambda x: x not in param_names, expr_fields_names)
+
+ field_mapping = {}
+ for r in resolved:
+ field_mapping[r] = (r, None)
+
+ if len(unresolved)>0:
+ tmp_prefix = prefix
+ if len(tmp_prefix)==0:
+ raise Exception("found an empty prefix while resolving expr field names for list %s",
+ field.c_field_name)
+
+ field_mapping.update(_c_helper_resolve_field_names(prefix))
+ resolved += filter(lambda x: x in field_mapping, unresolved)
+ unresolved = filter(lambda x: x not in field_mapping, unresolved)
+ if len(unresolved)>0:
+ raise Exception('could not resolve the length fields required for list %s' % field.c_field_name)
+
+ list_length = _c_accessor_get_expr(expr, field_mapping)
+
+ # default: list with fixed size elements
+ length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
+
+ # list with variable-sized elements
+ if not field.type.member.fixed_size():
+ length = ''
+ if context in ('unserialize', 'sizeof', 'unpack'):
+ int_i = ' unsigned int i;'
+ xcb_tmp_len = ' unsigned int xcb_tmp_len;'
+ if int_i not in temp_vars:
+ temp_vars.append(int_i)
+ if xcb_tmp_len not in temp_vars:
+ temp_vars.append(xcb_tmp_len)
+ # loop over all list elements and call sizeof repeatedly
+ # this should be a bit faster than using the iterators
+ code_lines.append("%s for(i=0; i<%s; i++) {" % (space, list_length))
+ code_lines.append("%s xcb_tmp_len = %s(xcb_tmp);" %
+ (space, field.type.c_sizeof_name))
+ code_lines.append("%s xcb_block_len += xcb_tmp_len;" % space)
+ code_lines.append("%s xcb_tmp += xcb_tmp_len;" % space)
+ code_lines.append("%s }" % space)
+
+ elif 'serialize' == context:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = 0;' % space)
+ code_lines.append('%s xcb_tmp = (char *) %s%s;' % (space, prefix_str, field.c_field_name))
+ code_lines.append('%s for(i=0; i<%s; i++) { ' % (space, list_length))
+ code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_sizeof_name))
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
+ code_lines.append('%s }' % space)
+ code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
+
+ return length
+# _c_serialize_helper_list_field()
+
+def _c_serialize_helper_fields_fixed_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ # keep the C code a bit more readable by giving the field name
+ if not self.is_bitcase:
+ code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
+ else:
+ scoped_name = [p[2].c_type if idx==0 else p[0] for idx, p in enumerate(prefix)]
+ typename = reduce(lambda x,y: "%s.%s" % (x, y), scoped_name)
+ code_lines.append('%s /* %s.%s */' % (space, typename, field.c_field_name))
+
+ abs_field_name = _c_helper_absolute_name(prefix, field)
+ # default for simple cases: call sizeof()
+ length = "sizeof(%s)" % field.c_field_type
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ # default: simple cast
+ value = ' %s = *(%s *)xcb_tmp;' % (abs_field_name, field.c_field_type)
+
+ # padding - we could probably just ignore it
+ if field.type.is_pad and field.type.nmemb > 1:
+ value = ''
+ for i in range(field.type.nmemb):
+ code_lines.append('%s %s[%d] = *(%s *)xcb_tmp;' %
+ (space, abs_field_name, i, field.c_field_type))
+ # total padding = sizeof(pad0) * nmemb
+ length += " * %d" % field.type.nmemb
+
+ if field.type.is_list:
+ # no such case in the protocol, cannot be tested and therefore ignored for now
+ raise Exception('list with fixed number of elemens unhandled in _unserialize()')
+
+ elif 'serialize' == context:
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
+
+ if field.type.is_expr:
+ # need to register a temporary variable for the expression in case we know its type
+ if field.type.c_type is None:
+ raise Exception("type for field '%s' (expression '%s') unkown" %
+ (field.field_name, _c_accessor_get_expr(field.type.expr)))
+
+ temp_vars.append(' %s xcb_expr_%s = %s;' % (field.type.c_type, _cpp(field.field_name),
+ _c_accessor_get_expr(field.type.expr, prefix)))
+ value += "&xcb_expr_%s;" % _cpp(field.field_name)
+
+ elif field.type.is_pad:
+ if field.type.nmemb == 1:
+ value += "&xcb_pad;"
+ else:
+ # we could also set it to 0, see definition of xcb_send_request()
+ value = ' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;'
+ length += "*%d" % field.type.nmemb
+
+ else:
+ # non-list type with fixed size
+ if field.type.nmemb == 1:
+ value += "&%s;" % (abs_field_name)
+
+ # list with nmemb (fixed size) elements
+ else:
+ value += '%s;' % (abs_field_name)
+ length = '%d' % field.type.nmemb
+
+ return (value, length)
+# _c_serialize_helper_fields_fixed_size()
+
+def _c_serialize_helper_fields_variable_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ prefix_str = _c_helper_absolute_name(prefix)
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ value = ''
+ var_field_name = 'xcb_tmp'
+
+ # special case: intermixed fixed and variable size fields
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ value = ' %s = (%s *)xcb_tmp;' % (field.c_field_name, field.c_field_type)
+ temp_vars.append(' %s *%s;' % (field.type.c_type, field.c_field_name))
+ # special case: switch
+ if 'unpack' == context:
+ value = ' %s%s = (%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
+
+ elif 'serialize' == context:
+ # variable size fields appear as parameters to _serialize() if the
+ # 'toplevel' container is not a switch
+ prefix_string = prefix_str if prefix[0][2].is_switch else ''
+ var_field_name = "%s%s" % (prefix_string, field.c_field_name)
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s;' % var_field_name
+
+ length = ''
+
+ code_lines.append('%s /* %s */' % (space, field.c_field_name))
+
+ if field.type.is_list:
+ if value != '':
+ # in any context, list is already a pointer, so the default assignment is ok
+ code_lines.append("%s%s" % (space, value))
+ value = ''
+ length = _c_serialize_helper_list_field(context, self, field,
+ code_lines, temp_vars,
+ space, prefix)
+
+ elif field.type.is_switch:
+ value = ''
+ if context == 'serialize':
+ # the _serialize() function allocates the correct amount memory if given a NULL pointer
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *)0;'
+ length = _c_serialize_helper_switch_field(context, self, field,
+ 'xcb_parts[xcb_parts_idx].iov_base',
+ prefix)
+
+ else:
+ # in all remaining special cases - call _sizeof()
+ length = "%s(%s)" % (field.type.c_sizeof_name, var_field_name)
+
+ return (value, length)
+# _c_serialize_helper_fields_variable_size
+
+def _c_serialize_helper_fields(context, self,
+ code_lines, temp_vars,
+ space, prefix, is_bitcase):
+ count = 0
+ need_padding = False
+ prev_field_was_variable = False
+
+ for field in self.fields:
+ if not field.visible:
+ if not ((field.wire and not field.auto) or 'unserialize' == context):
+ continue
+
+ # switch/bitcase: fixed size fields must be considered explicitly
+ if field.type.fixed_size():
+ if self.is_bitcase or self.var_followed_by_fixed_fields:
+ if prev_field_was_variable and need_padding:
+ # insert padding
+# count += _c_serialize_helper_insert_padding(context, code_lines, space,
+# self.var_followed_by_fixed_fields)
+ prev_field_was_variable = False
+
+ # prefix for fixed size fields
+ fixed_prefix = prefix
+
+ value, length = _c_serialize_helper_fields_fixed_size(context, self, field,
+ code_lines, temp_vars,
+ space, fixed_prefix)
+ else:
+ continue
+
+ # fields with variable size
+ else:
+ # switch/bitcase: always calculate padding before and after variable sized fields
+ if need_padding or is_bitcase:
+ count += _c_serialize_helper_insert_padding(context, code_lines, space,
+ self.var_followed_by_fixed_fields)
+
+ value, length = _c_serialize_helper_fields_variable_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix)
+ prev_field_was_variable = True
+
+ # save (un)serialization C code
+ if '' != value:
+ code_lines.append('%s%s' % (space, value))
+
+ if field.type.fixed_size():
+ if is_bitcase or self.var_followed_by_fixed_fields:
+ # keep track of (un)serialized object's size
+ code_lines.append('%s xcb_block_len += %s;' % (space, length))
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ code_lines.append('%s xcb_tmp += %s;' % (space, length))
+ else:
+ # variable size objects or bitcase:
+ # value & length might have been inserted earlier for special cases
+ if '' != length:
+ # special case: intermixed fixed and variable size fields
+ if (not field.type.fixed_size() and
+ self.var_followed_by_fixed_fields and 'unserialize' == context):
+ temp_vars.append(' int %s_len;' % field.c_field_name)
+ code_lines.append('%s %s_len = %s;' % (space, field.c_field_name, length))
+ code_lines.append('%s xcb_block_len += %s_len;' % (space, field.c_field_name))
+ code_lines.append('%s xcb_tmp += %s_len;' % (space, field.c_field_name))
+ else:
+ code_lines.append('%s xcb_block_len += %s;' % (space, length))
+ # increase pointer into the byte stream accordingly
+ if context in ('unserialize', 'sizeof', 'unpack'):
+ code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+
+ if 'serialize' == context:
+ if '' != length:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = %s;' % (space, length))
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ count += 1
+
+ need_padding = True
+ if self.var_followed_by_fixed_fields:
+ need_padding = False
+
+ return count
+# _c_serialize_helper_fields()
+
+def _c_serialize_helper(context, complex_type,
+ code_lines, temp_vars,
+ space='', prefix=[]):
+ # count tracks the number of fields to serialize
+ count = 0
+
+ if hasattr(complex_type, 'type'):
+ self = complex_type.type
+ complex_name = complex_type.name
+ else:
+ self = complex_type
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ complex_name = 'xcb_out'
+ else:
+ complex_name = '_aux'
+
+ # special case: switch is serialized by evaluating each bitcase separately
+ if self.is_switch:
+ count += _c_serialize_helper_switch(context, self, complex_name,
+ code_lines, temp_vars,
+ space, prefix)
+
+ # all other data types can be evaluated one field a time
+ else:
+ # unserialize & fixed size fields: simply cast the buffer to the respective xcb_out type
+ if context in ('unserialize', 'unpack', 'sizeof') and not self.var_followed_by_fixed_fields:
+ code_lines.append('%s xcb_block_len += sizeof(%s);' % (space, self.c_type))
+ code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+ # probably not needed
+ #_c_serialize_helper_insert_padding(context, code_lines, space, False)
+
+ count += _c_serialize_helper_fields(context, self,
+ code_lines, temp_vars,
+ space, prefix, False)
+ # "final padding"
+ count += _c_serialize_helper_insert_padding(context, code_lines, space, False)
+
+ return count
+# _c_serialize_helper()
+
+def _c_serialize(context, self):
+ """
+ depending on the context variable, generate _serialize(), _unserialize(), _unpack(), or _sizeof()
+ for the ComplexType variable self
+ """
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ _hc('')
+ # _serialize() returns the buffer size
+ _hc('int')
+
+ if self.is_switch and 'unserialize' == context:
+ context = 'unpack'
+
+ cases = { 'serialize' : self.c_serialize_name,
+ 'unserialize' : self.c_unserialize_name,
+ 'unpack' : self.c_unpack_name,
+ 'sizeof' : self.c_sizeof_name }
+ func_name = cases[context]
+
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+
+ # determine N(variable_fields)
+ for field in param_fields:
+ # if self.is_switch, treat all fields as if they are variable sized
+ if not field.type.fixed_size() or self.is_switch:
+ variable_size_fields += 1
+ # determine maxtypelen
+ for p in params:
+ maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
+
+ # write to .c/.h
+ indent = ' '*(len(func_name)+2)
+ param_str = []
+ for p in params:
+ typespec, pointerspec, field_name = p
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ param_str.append("%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name))
+ # insert function name
+ param_str[0] = "%s (%s" % (func_name, param_str[0].strip())
+ param_str = map(lambda x: "%s," % x, param_str)
+ for s in param_str[:-1]:
+ _hc(s)
+ _h("%s);" % param_str[-1].rstrip(','))
+ _c("%s)" % param_str[-1].rstrip(','))
+ _c('{')
+
+ code_lines = []
+ temp_vars = []
+ prefix = []
+
+ if 'serialize' == context:
+ if not self.is_switch and not self.var_followed_by_fixed_fields:
+ _c(' %s *xcb_out = *_buffer;', self.c_type)
+ _c(' unsigned int xcb_out_pad = -sizeof(%s) & 3;', self.c_type)
+ _c(' unsigned int xcb_buffer_len = sizeof(%s) + xcb_out_pad;', self.c_type)
+ else:
+ _c(' char *xcb_out = *_buffer;')
+ _c(' unsigned int xcb_buffer_len = 0;')
+ prefix = [('_aux', '->', self)]
+ aux_ptr = 'xcb_out'
+
+ elif context in ('unserialize', 'unpack'):
+ _c(' char *xcb_tmp = (char *)_buffer;')
+ if not self.is_switch:
+ if not self.var_followed_by_fixed_fields:
+ _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
+ prefix = [('_aux', '->', self)]
+ else:
+ _c(' %s xcb_out;', self.c_type)
+ prefix = [('xcb_out', '.', self)]
+ else:
+ aux_var = '_aux' # default for unpack: single pointer
+ # note: unserialize not generated for switch
+ if 'unserialize' == context:
+ aux_var = '(*_aux)' # unserialize: double pointer (!)
+ prefix = [(aux_var, '->', self)]
+ aux_ptr = '*_aux'
+ _c(' unsigned int xcb_buffer_len = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ _c(' unsigned int xcb_pad = 0;')
+
+ elif 'sizeof' == context:
+ param_names = [p[2] for p in params]
+ if self.is_switch:
+ # switch: call _unpack()
+ _c(' %s _aux;', self.c_type)
+ _c(' return %s(%s, &_aux);', self.c_unpack_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
+ _c('}')
+ return
+ elif self.var_followed_by_fixed_fields:
+ # special case: call _unserialize()
+ _c(' return %s(%s, NULL);', self.c_unserialize_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
+ _c('}')
+ return
+ else:
+ _c(' char *xcb_tmp = (char *)_buffer;')
+ prefix = [('_aux', '->', self)]
+
+ count = _c_serialize_helper(context, self, code_lines, temp_vars, prefix=prefix)
+ # update variable size fields (only important for context=='serialize'
+ variable_size_fields = count
+ if 'serialize' == context:
+ temp_vars.append(' unsigned int xcb_pad = 0;')
+ temp_vars.append(' char xcb_pad0[3] = {0, 0, 0};')
+ temp_vars.append(' struct iovec xcb_parts[%d];' % count)
+ temp_vars.append(' unsigned int xcb_parts_idx = 0;')
+ temp_vars.append(' unsigned int xcb_block_len = 0;')
+ temp_vars.append(' unsigned int i;')
+ temp_vars.append(' char *xcb_tmp;')
+ elif 'sizeof' == context:
+ # neither switch nor intermixed fixed and variable size fields:
+ # evaluate parameters directly
+ if not (self.is_switch or self.var_followed_by_fixed_fields):
+
+ # look if we have to declare an '_aux' variable at all
+ if len(filter(lambda x: x.find('_aux')!=-1, code_lines))>0:
+ if not self.var_followed_by_fixed_fields:
+ _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
+ else:
+ _c(' %s *_aux = malloc(sizeof(%s));', self.c_type, self.c_type)
+
+ _c(' unsigned int xcb_buffer_len = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ _c(' unsigned int xcb_pad = 0;')
+
+ _c('')
+ for t in temp_vars:
+ _c(t)
+ _c('')
+ for l in code_lines:
+ _c(l)
+
+ # variable sized fields have been collected, now
+ # allocate memory and copy everything into a continuous memory area
+ # note: this is not necessary in case of unpack
+ if context in ('serialize', 'unserialize'):
+ # unserialize: check for sizeof-only invocation
+ if 'unserialize' == context:
+ _c('')
+ _c(' if (NULL == _aux)')
+ _c(' return xcb_buffer_len;')
+
+ _c('')
+ _c(' if (NULL == %s) {', aux_ptr)
+ _c(' /* allocate memory */')
+ _c(' %s = malloc(xcb_buffer_len);', aux_ptr)
+ if 'serialize' == context:
+ _c(' *_buffer = xcb_out;')
+ _c(' }')
+ _c('')
+
+ # serialize: handle variable size fields in a loop
+ if 'serialize' == context:
+ if not self.is_switch and not self.var_followed_by_fixed_fields:
+ if len(wire_fields)>0:
+ _c(' *xcb_out = *_aux;')
+ # copy variable size fields into the buffer
+ if variable_size_fields > 0:
+ # xcb_out padding
+ if not self.is_switch and not self.var_followed_by_fixed_fields:
+ _c(' xcb_tmp = (char*)++xcb_out;')
+ _c(' xcb_tmp += xcb_out_pad;')
+ else:
+ _c(' xcb_tmp = xcb_out;')
+
+ # variable sized fields
+ _c(' for(i=0; i<xcb_parts_idx; i++) {')
+ _c(' if (0 != xcb_parts[i].iov_base && 0 != xcb_parts[i].iov_len)')
+ _c(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
+ _c(' if (0 != xcb_parts[i].iov_len)')
+ _c(' xcb_tmp += xcb_parts[i].iov_len;')
+ _c(' }')
+
+ # unserialize: assign variable size fields individually
+ if 'unserialize' == context:
+ _c(' xcb_tmp = ((char *)*_aux)+xcb_buffer_len;')
+ param_fields.reverse()
+ for field in param_fields:
+ if not field.type.fixed_size():
+ _c(' xcb_tmp -= %s_len;', field.c_field_name)
+ _c(' memmove(xcb_tmp, %s, %s_len);', field.c_field_name, field.c_field_name)
+ _c(' *%s = xcb_out;', aux_ptr)
+
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_serialize()
+
+def _c_iterator_get_end(field, accum):
+ '''
+ Figures out what C code is needed to find the end of a variable-length structure field.
+ For nested structures, recurses into its last variable-sized field.
+ For lists, calls the end function
+ '''
+ if field.type.is_container:
+ accum = field.c_accessor_name + '(' + accum + ')'
+ return _c_iterator_get_end(field.type.last_varsized_field, accum)
+ if field.type.is_list:
+ # XXX we can always use the first way
+ if field.type.member.is_simple:
+ return field.c_end_name + '(' + accum + ')'
+ else:
+ return field.type.member.c_end_name + '(' + field.c_iterator_name + '(' + accum + '))'
+
+def _c_iterator(self, name):
+ '''
+ Declares the iterator structure and next/end functions for a given type.
+ '''
+ _h_setlevel(0)
+ _h('')
+ _h('/**')
+ _h(' * @brief %s', self.c_iterator_type)
+ _h(' **/')
+ _h('typedef struct %s {', self.c_iterator_type)
+ _h(' %s *data; /**< */', self.c_type)
+ _h(' int%s rem; /**< */', ' ' * (len(self.c_type) - 2))
+ _h(' int%s index; /**< */', ' ' * (len(self.c_type) - 2))
+ _h('} %s;', self.c_iterator_type)
+
+ _h_setlevel(1)
+ _c_setlevel(1)
+ _h('')
+ _h('/**')
+ _h(' * Get the next element of the iterator')
+ _h(' * @param i Pointer to a %s', self.c_iterator_type)
+ _h(' *')
+ _h(' * Get the next element in the iterator. The member rem is')
+ _h(' * decreased by one. The member data points to the next')
+ _h(' * element. The member index is increased by sizeof(%s)', self.c_type)
+ _h(' */')
+ _c('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** void %s', self.c_next_name)
+ _hc(' ** ')
+ _hc(' ** @param %s *i', self.c_iterator_type)
+ _hc(' ** @returns void')
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('void')
+ _h('%s (%s *i /**< */);', self.c_next_name, self.c_iterator_type)
+ _c('%s (%s *i /**< */)', self.c_next_name, self.c_iterator_type)
+ _c('{')
+
+ if not self.fixed_size():
+ _c(' %s *R = i->data;', self.c_type)
+
+ if self.is_union:
+ # FIXME - how to determine the size of a variable size union??
+ _c(' /* FIXME - determine the size of the union %s */', self.c_type)
+ else:
+ if self.need_sizeof:
+ _c(' xcb_generic_iterator_t child;')
+ _c(' child.data = (%s *)(((char *)R) + %s(R));',
+ self.c_type, self.c_sizeof_name)
+ _c(' i->index = (char *) child.data - (char *) i->data;')
+ else:
+ _c(' xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
+ _c(' i->index = child.index;')
+ _c(' --i->rem;')
+ _c(' i->data = (%s *) child.data;', self.c_type)
+
+ else:
+ _c(' --i->rem;')
+ _c(' ++i->data;')
+ _c(' i->index += sizeof(%s);', self.c_type)
+
+ _c('}')
+
+ _h('')
+ _h('/**')
+ _h(' * Return the iterator pointing to the last element')
+ _h(' * @param i An %s', self.c_iterator_type)
+ _h(' * @return The iterator pointing to the last element')
+ _h(' *')
+ _h(' * Set the current element in the iterator to the last element.')
+ _h(' * The member rem is set to 0. The member data points to the')
+ _h(' * last element.')
+ _h(' */')
+ _c('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** xcb_generic_iterator_t %s', self.c_end_name)
+ _hc(' ** ')
+ _hc(' ** @param %s i', self.c_iterator_type)
+ _hc(' ** @returns xcb_generic_iterator_t')
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('xcb_generic_iterator_t')
+ _h('%s (%s i /**< */);', self.c_end_name, self.c_iterator_type)
+ _c('%s (%s i /**< */)', self.c_end_name, self.c_iterator_type)
+ _c('{')
+ _c(' xcb_generic_iterator_t ret;')
+
+ if self.fixed_size():
+ _c(' ret.data = i.data + i.rem;')
+ _c(' ret.index = i.index + ((char *) ret.data - (char *) i.data);')
+ _c(' ret.rem = 0;')
+ else:
+ _c(' while(i.rem > 0)')
+ _c(' %s(&i);', self.c_next_name)
+ _c(' ret.data = i.data;')
+ _c(' ret.rem = i.rem;')
+ _c(' ret.index = i.index;')
+
+ _c(' return ret;')
+ _c('}')
+
+def _c_accessor_get_length(expr, field_mapping=None):
+ '''
+ Figures out what C code is needed to get a length field.
+ The field_mapping parameter can be used to change the absolute name of a length field.
+ For fields that follow a variable-length field, use the accessor.
+ Otherwise, just reference the structure field directly.
+ '''
+
+ lenfield_name = expr.lenfield_name
+ if lenfield_name is not None:
+ if field_mapping is not None:
+ lenfield_name = field_mapping[lenfield_name][0]
+
+ if expr.lenfield is not None and expr.lenfield.prev_varsized_field is not None:
+ # special case: variable and fixed size fields are intermixed
+ # if the lenfield is among the fixed size fields, there is no need
+ # to call a special accessor function like <expr.lenfield.c_accessor_name + '(' + prefix + ')'>
+ return field_mapping(expr.lenfield_name)
+ elif expr.lenfield_name is not None:
+ return lenfield_name
+ else:
+ return str(expr.nmemb)
+
+def _c_accessor_get_expr(expr, field_mapping):
+ '''
+ Figures out what C code is needed to get the length of a list field.
+ The field_mapping parameter can be used to change the absolute name of a length field.
+ Recurses for math operations.
+ Returns bitcount for value-mask fields.
+ Otherwise, uses the value of the length field.
+ '''
+ lenexp = _c_accessor_get_length(expr, field_mapping)
+
+ if expr.op == '~':
+ return '(' + '~' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
+ elif expr.op == 'popcount':
+ return 'xcb_popcount(' + _c_accessor_get_expr(expr.rhs, field_mapping) + ')'
+ elif expr.op == 'enumref':
+ enum_name = expr.lenfield_type.name
+ constant_name = expr.lenfield_name
+ c_name = _n(enum_name + (constant_name,)).upper()
+ return c_name
+ elif expr.op == 'sumof':
+ # locate the referenced list object
+ list_obj = expr.lenfield_type
+ field = None
+ for f in expr.lenfield_parent.fields:
+ if f.field_name == expr.lenfield_name:
+ field = f
+ break
+
+ if field is None:
+ raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
+ list_name = field_mapping[field.c_field_name][0]
+ c_length_func = "%s(%s)" % (field.c_length_name, list_name)
+ # note: xcb_sumof() has only been defined for integers
+ c_length_func = _c_accessor_get_expr(field.type.expr, field_mapping)
+ return 'xcb_sumof(%s, %s)' % (list_name, c_length_func)
+ elif expr.op != None:
+ return ('(' + _c_accessor_get_expr(expr.lhs, field_mapping) +
+ ' ' + expr.op + ' ' +
+ _c_accessor_get_expr(expr.rhs, field_mapping) + ')')
+ elif expr.bitfield:
+ return 'xcb_popcount(' + lenexp + ')'
+ else:
+ return lenexp
+
+def type_pad_type(type):
+ if type == 'void':
+ return 'char'
+ return type
+
+def _c_accessors_field(self, field):
+ '''
+ Declares the accessor functions for a non-list field that follows a variable-length field.
+ '''
+ c_type = self.c_type
+
+ # special case: switch
+ switch_obj = self if self.is_switch else None
+ if self.is_bitcase:
+ switch_obj = self.parents[-1]
+ if switch_obj is not None:
+ c_type = switch_obj.c_type
+
+ if field.type.is_simple:
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' ** ')
+ _hc(' ** %s %s', field.c_field_type, field.c_accessor_name)
+ _hc(' ** ')
+ _hc(' ** @param const %s *R', c_type)
+ _hc(' ** @returns %s', field.c_field_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('%s', field.c_field_type)
+ _h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
+ _c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
+ _c('{')
+ if field.prev_varsized_field is None:
+ _c(' return (%s *) (R + 1);', field.c_field_type)
+ else:
+ _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
+ _c(' return * (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
+ field.c_field_type, type_pad_type(field.first_field_after_varsized.type.c_type), field.prev_varsized_offset)
+ _c('}')
+ else:
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
+ _hc(' ** ')
+ _hc(' ** @param const %s *R', c_type)
+ _hc(' ** @returns %s *', field.c_field_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ if field.type.is_switch and switch_obj is None:
+ return_type = 'void *'
+ else:
+ return_type = '%s *' % field.c_field_type
+
+ _hc(return_type)
+ _h('%s (const %s *R /**< */);', field.c_accessor_name, c_type)
+ _c('%s (const %s *R /**< */)', field.c_accessor_name, c_type)
+ _c('{')
+ if field.prev_varsized_field is None:
+ _c(' return (%s) (R + 1);', return_type)
+ # note: the special case 'variable fields followed by fixed size fields'
+ # is not of any consequence here, since the ordering gets
+ # 'corrected' in the reply function
+ else:
+ _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
+ _c(' return (%s) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
+ return_type, type_pad_type(field.first_field_after_varsized.type.c_type), field.prev_varsized_offset)
+ _c('}')
+
+
+def _c_accessors_list(self, field):
+ '''
+ Declares the accessor functions for a list field.
+ Declares a direct-accessor function only if the list members are fixed size.
+ Declares length and get-iterator functions always.
+ '''
+ list = field.type
+ c_type = self.c_type
+
+ # special case: switch
+ # in case of switch, 2 params have to be supplied to certain accessor functions:
+ # 1. the anchestor object (request or reply)
+ # 2. the (anchestor) switch object
+ # the reason is that switch is either a child of a request/reply or nested in another switch,
+ # so whenever we need to access a length field, we might need to refer to some anchestor type
+ switch_obj = self if self.is_switch else None
+ if self.is_bitcase:
+ switch_obj = self.parents[-1]
+ if switch_obj is not None:
+ c_type = switch_obj.c_type
+
+ params = []
+ fields = {}
+ parents = self.parents if hasattr(self, 'parents') else [self]
+ # 'R': parents[0] is always the 'toplevel' container type
+ params.append(('const %s *R' % parents[0].c_type, parents[0]))
+ fields.update(_c_helper_field_mapping(parents[0], [('R', '->', parents[0])], flat=True))
+ # auxiliary object for 'R' parameters
+ R_obj = parents[0]
+
+ if switch_obj is not None:
+ # now look where the fields are defined that are needed to evaluate
+ # the switch expr, and store the parent objects in accessor_params and
+ # the fields in switch_fields
+
+ # 'S': name for the 'toplevel' switch
+ toplevel_switch = parents[1]
+ params.append(('const %s *S' % toplevel_switch.c_type, toplevel_switch))
+ fields.update(_c_helper_field_mapping(toplevel_switch, [('S', '->', toplevel_switch)], flat=True))
+
+ # initialize prefix for everything "below" S
+ prefix_str = '/* %s */ S' % toplevel_switch.name[-1]
+ prefix = [(prefix_str, '->', toplevel_switch)]
+
+ # look for fields in the remaining containers
+ for p in parents[2:] + [self]:
+ # the separator between parent and child is always '.' here,
+ # because of nested switch statements
+ if not p.is_bitcase or (p.is_bitcase and p.has_name):
+ prefix.append((p.name[-1], '.', p))
+ fields.update(_c_helper_field_mapping(p, prefix, flat=True))
+
+ # auxiliary object for 'S' parameter
+ S_obj = parents[1]
+
+ _h_setlevel(1)
+ _c_setlevel(1)
+ if list.member.fixed_size():
+ idx = 1 if switch_obj is not None else 0
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
+ _hc(' ** ')
+ _hc(' ** @param %s', params[idx][0])
+ _hc(' ** @returns %s *', field.c_field_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('%s *', field.c_field_type)
+
+ _h('%s (%s /**< */);', field.c_accessor_name, params[idx][0])
+ _c('%s (%s /**< */)', field.c_accessor_name, params[idx][0])
+
+ _c('{')
+ if switch_obj is not None:
+ _c(' return %s;', fields[field.c_field_name][0])
+ elif field.prev_varsized_field is None:
+ _c(' return (%s *) (R + 1);', field.c_field_type)
+ else:
+ _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
+ _c(' return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);',
+ field.c_field_type, type_pad_type(field.first_field_after_varsized.type.c_type), field.prev_varsized_offset)
+ _c('}')
+
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** int %s', field.c_length_name)
+ _hc(' ** ')
+ _hc(' ** @param const %s *R', c_type)
+ _hc(' ** @returns int')
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('int')
+ if switch_obj is not None:
+ _hc('%s (const %s *R /**< */,', field.c_length_name, R_obj.c_type)
+ spacing = ' '*(len(field.c_length_name)+2)
+ _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
+ _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
+ length = _c_accessor_get_expr(field.type.expr, fields)
+ else:
+ _h('%s (const %s *R /**< */);', field.c_length_name, c_type)
+ _c('%s (const %s *R /**< */)', field.c_length_name, c_type)
+ length = _c_accessor_get_expr(field.type.expr, fields)
+ _c('{')
+ _c(' return %s;', length)
+ _c('}')
+
+ if field.type.member.is_simple:
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** xcb_generic_iterator_t %s', field.c_end_name)
+ _hc(' ** ')
+ _hc(' ** @param const %s *R', c_type)
+ _hc(' ** @returns xcb_generic_iterator_t')
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('xcb_generic_iterator_t')
+ if switch_obj is not None:
+ _hc('%s (const %s *R /**< */,', field.c_end_name, R_obj.c_type)
+ spacing = ' '*(len(field.c_end_name)+2)
+ _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
+ _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
+ else:
+ _h('%s (const %s *R /**< */);', field.c_end_name, c_type)
+ _c('%s (const %s *R /**< */)', field.c_end_name, c_type)
+ _c('{')
+ _c(' xcb_generic_iterator_t i;')
+
+ param = 'R' if switch_obj is None else 'S'
+ if switch_obj is not None:
+ _c(' i.data = %s + %s;', fields[field.c_field_name][0],
+ _c_accessor_get_expr(field.type.expr, fields))
+ elif field.prev_varsized_field == None:
+ _c(' i.data = ((%s *) (R + 1)) + (%s);', field.type.c_wiretype,
+ _c_accessor_get_expr(field.type.expr, fields))
+ else:
+ _c(' xcb_generic_iterator_t child = %s;',
+ _c_iterator_get_end(field.prev_varsized_field, 'R'))
+ _c(' i.data = ((%s *) child.data) + (%s);', field.type.c_wiretype,
+ _c_accessor_get_expr(field.type.expr, fields))
+
+ _c(' i.rem = 0;')
+ _c(' i.index = (char *) i.data - (char *) %s;', param)
+ _c(' return i;')
+ _c('}')
+
+ else:
+ _hc('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** %s %s', field.c_iterator_type, field.c_iterator_name)
+ _hc(' ** ')
+ _hc(' ** @param const %s *R', c_type)
+ _hc(' ** @returns %s', field.c_iterator_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+
+ _hc('%s', field.c_iterator_type)
+ if switch_obj is not None:
+ _hc('%s (const %s *R /**< */,', field.c_iterator_name, R_obj.c_type)
+ spacing = ' '*(len(field.c_iterator_name)+2)
+ _h('%sconst %s *S /**< */);', spacing, S_obj.c_type)
+ _c('%sconst %s *S /**< */)', spacing, S_obj.c_type)
+ else:
+ _h('%s (const %s *R /**< */);', field.c_iterator_name, c_type)
+ _c('%s (const %s *R /**< */)', field.c_iterator_name, c_type)
+ _c('{')
+ _c(' %s i;', field.c_iterator_type)
+
+ if switch_obj is not None:
+ _c(' i.data = %s;', fields[field.c_field_name][0])
+ _c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
+ elif field.prev_varsized_field == None:
+ _c(' i.data = (%s *) (R + 1);', field.c_field_type)
+ else:
+ _c(' xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
+ _c(' i.data = (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index));',
+ field.c_field_type, type_pad_type(field.c_field_type))
+ if switch_obj is None:
+ _c(' i.rem = %s;', _c_accessor_get_expr(field.type.expr, fields))
+ _c(' i.index = (char *) i.data - (char *) %s;', 'R' if switch_obj is None else 'S' )
+ _c(' return i;')
+ _c('}')
+
+def _c_accessors(self, name, base):
+ '''
+ Declares the accessor functions for the fields of a structure.
+ '''
+ # no accessors for switch itself -
+ # switch always needs to be unpacked explicitly
+# if self.is_switch:
+# pass
+# else:
+ if True:
+ for field in self.fields:
+ if field.type.is_list and not field.type.fixed_size():
+ _c_accessors_list(self, field)
+ elif field.prev_varsized_field is not None or not field.type.fixed_size():
+ _c_accessors_field(self, field)
+
+def c_simple(self, name):
+ '''
+ Exported function that handles cardinal type declarations.
+ These are types which are typedef'd to one of the CARDx's, char, float, etc.
+ '''
+ _c_type_setup(self, name, ())
+
+ if (self.name != name):
+ # Typedef
+ _h_setlevel(0)
+ my_name = _t(name)
+ _h('')
+ _h('typedef %s %s;', _t(self.name), my_name)
+
+ # Iterator
+ _c_iterator(self, name)
+
+def _c_complex(self):
+ '''
+ Helper function for handling all structure types.
+ Called for all structs, requests, replies, events, errors.
+ '''
+ _h_setlevel(0)
+ _h('')
+ _h('/**')
+ _h(' * @brief %s', self.c_type)
+ _h(' **/')
+ _h('typedef %s %s {', self.c_container, self.c_type)
+
+ struct_fields = []
+ maxtypelen = 0
+
+ varfield = None
+ for field in self.fields:
+ if not field.type.fixed_size() and not self.is_switch and not self.is_union:
+ varfield = field.c_field_name
+ continue
+ if field.wire:
+ struct_fields.append(field)
+
+ for field in struct_fields:
+ length = len(field.c_field_type)
+ # account for '*' pointer_spec
+ if not field.type.fixed_size():
+ length += 1
+ maxtypelen = max(maxtypelen, length)
+
+ def _c_complex_field(self, field, space=''):
+ if (field.type.fixed_size() or
+ # in case of switch with switch children, don't make the field a pointer
+ # necessary for unserialize to work
+ (self.is_switch and field.type.is_switch)):
+ spacing = ' ' * (maxtypelen - len(field.c_field_type))
+ _h('%s %s%s %s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
+ else:
+ spacing = ' ' * (maxtypelen - (len(field.c_field_type) + 1))
+ _h('%s %s%s *%s%s; /**< */', space, field.c_field_type, spacing, field.c_field_name, field.c_subscript)
+
+ if not self.is_switch:
+ for field in struct_fields:
+ _c_complex_field(self, field)
+ else:
+ for b in self.bitcases:
+ space = ''
+ if b.type.has_name:
+ _h(' struct _%s {', b.c_field_name)
+ space = ' '
+ for field in b.type.fields:
+ _c_complex_field(self, field, space)
+ if b.type.has_name:
+ _h(' } %s;', b.c_field_name)
+
+ _h('} %s;', self.c_type)
+
+def c_struct(self, name):
+ '''
+ Exported function that handles structure declarations.
+ '''
+ _c_type_setup(self, name, ())
+ _c_complex(self)
+ _c_accessors(self, name, name)
+ _c_iterator(self, name)
+
+def c_union(self, name):
+ '''
+ Exported function that handles union declarations.
+ '''
+ _c_type_setup(self, name, ())
+ _c_complex(self)
+ _c_iterator(self, name)
+
+def _c_request_helper(self, name, cookie_type, void, regular, aux=False):
+ '''
+ Declares a request function.
+ '''
+
+ # Four stunningly confusing possibilities here:
+ #
+ # Void Non-void
+ # ------------------------------
+ # "req" "req"
+ # 0 flag CHECKED flag Normal Mode
+ # void_cookie req_cookie
+ # ------------------------------
+ # "req_checked" "req_unchecked"
+ # CHECKED flag 0 flag Abnormal Mode
+ # void_cookie req_cookie
+ # ------------------------------
+
+
+ # Whether we are _checked or _unchecked
+ checked = void and not regular
+ unchecked = not void and not regular
+
+ # What kind of cookie we return
+ func_cookie = 'xcb_void_cookie_t' if void else self.c_cookie_type
+
+ # What flag is passed to xcb_request
+ func_flags = '0' if (void and regular) or (not void and not regular) else 'XCB_REQUEST_CHECKED'
+
+ # Global extension id variable or NULL for xproto
+ func_ext_global = '&' + _ns.c_ext_global_name if _ns.is_ext else '0'
+
+ # What our function name is
+ func_name = self.c_request_name if not aux else self.c_aux_name
+ if checked:
+ func_name = self.c_checked_name if not aux else self.c_aux_checked_name
+ if unchecked:
+ func_name = self.c_unchecked_name if not aux else self.c_aux_unchecked_name
+
+ param_fields = []
+ wire_fields = []
+ maxtypelen = len('xcb_connection_t')
+ serial_fields = []
+ # special case: list with variable size elements
+ list_with_var_size_elems = False
+
+ for field in self.fields:
+ if field.visible:
+ # The field should appear as a call parameter
+ param_fields.append(field)
+ if field.wire and not field.auto:
+ # We need to set the field up in the structure
+ wire_fields.append(field)
+ if field.type.need_serialize or field.type.need_sizeof:
+ serial_fields.append(field)
+
+ for field in param_fields:
+ c_field_const_type = field.c_field_const_type
+ if field.type.need_serialize and not aux:
+ c_field_const_type = "const void"
+ if len(c_field_const_type) > maxtypelen:
+ maxtypelen = len(c_field_const_type)
+ if field.type.is_list and not field.type.member.fixed_size():
+ list_with_var_size_elems = True
+
+ _h_setlevel(1)
+ _c_setlevel(1)
+ _h('')
+ _h('/**')
+ _h(' * Delivers a request to the X server')
+ _h(' * @param c The connection')
+ _h(' * @return A cookie')
+ _h(' *')
+ _h(' * Delivers a request to the X server.')
+ _h(' * ')
+ if checked:
+ _h(' * This form can be used only if the request will not cause')
+ _h(' * a reply to be generated. Any returned error will be')
+ _h(' * saved for handling by xcb_request_check().')
+ if unchecked:
+ _h(' * This form can be used only if the request will cause')
+ _h(' * a reply to be generated. Any returned error will be')
+ _h(' * placed in the event queue.')
+ _h(' */')
+ _c('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** %s %s', cookie_type, func_name)
+ _hc(' ** ')
+
+ spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
+ _hc(' ** @param xcb_connection_t%s *c', spacing)
+
+ for field in param_fields:
+ c_field_const_type = field.c_field_const_type
+ if field.type.need_serialize and not aux:
+ c_field_const_type = "const void"
+ spacing = ' ' * (maxtypelen - len(c_field_const_type))
+ _hc(' ** @param %s%s %s%s', c_field_const_type, spacing, field.c_pointer, field.c_field_name)
+
+ _hc(' ** @returns %s', cookie_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('%s', cookie_type)
+
+ spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
+ comma = ',' if len(param_fields) else ');'
+ _h('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
+ comma = ',' if len(param_fields) else ')'
+ _c('%s (xcb_connection_t%s *c /**< */%s', func_name, spacing, comma)
+
+ func_spacing = ' ' * (len(func_name) + 2)
+ count = len(param_fields)
+ for field in param_fields:
+ count = count - 1
+ c_field_const_type = field.c_field_const_type
+ c_pointer = field.c_pointer
+ if field.type.need_serialize and not aux:
+ c_field_const_type = "const void"
+ c_pointer = '*'
+ spacing = ' ' * (maxtypelen - len(c_field_const_type))
+ comma = ',' if count else ');'
+ _h('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
+ spacing, c_pointer, field.c_field_name, comma)
+ comma = ',' if count else ')'
+ _c('%s%s%s %s%s /**< */%s', func_spacing, c_field_const_type,
+ spacing, c_pointer, field.c_field_name, comma)
+
+ count = 2
+ if not self.var_followed_by_fixed_fields:
+ for field in param_fields:
+ if not field.type.fixed_size():
+ count = count + 2
+ if field.type.need_serialize:
+ # _serialize() keeps track of padding automatically
+ count -= 1
+ dimension = count + 2
+
+ _c('{')
+ _c(' static const xcb_protocol_request_t xcb_req = {')
+ _c(' /* count */ %d,', count)
+ _c(' /* ext */ %s,', func_ext_global)
+ _c(' /* opcode */ %s,', self.c_request_name.upper())
+ _c(' /* isvoid */ %d', 1 if void else 0)
+ _c(' };')
+ _c(' ')
+
+ _c(' struct iovec xcb_parts[%d];', dimension)
+ _c(' %s xcb_ret;', func_cookie)
+ _c(' %s xcb_out;', self.c_type)
+ if self.var_followed_by_fixed_fields:
+ _c(' /* in the protocol description, variable size fields are followed by fixed size fields */')
+ _c(' void *xcb_aux = 0;')
+
+
+ for idx, f in enumerate(serial_fields):
+ if aux:
+ _c(' void *xcb_aux%d = 0;' % (idx))
+ if list_with_var_size_elems:
+ _c(' unsigned int i;')
+ _c(' unsigned int xcb_tmp_len;')
+ _c(' char *xcb_tmp;')
+ _c(' ')
+ # simple request call tracing
+# _c(' printf("in function %s\\n");' % func_name)
+
+ # fixed size fields
+ for field in wire_fields:
+ if field.type.fixed_size():
+ if field.type.is_expr:
+ _c(' xcb_out.%s = %s;', field.c_field_name, _c_accessor_get_expr(field.type.expr, None))
+ elif field.type.is_pad:
+ if field.type.nmemb == 1:
+ _c(' xcb_out.%s = 0;', field.c_field_name)
+ else:
+ _c(' memset(xcb_out.%s, 0, %d);', field.c_field_name, field.type.nmemb)
+ else:
+ if field.type.nmemb == 1:
+ _c(' xcb_out.%s = %s;', field.c_field_name, field.c_field_name)
+ else:
+ _c(' memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)
+
+ def get_serialize_args(type_obj, c_field_name, aux_var, context='serialize'):
+ serialize_args = get_serialize_params(context, type_obj,
+ c_field_name,
+ aux_var)[2]
+ return reduce(lambda x,y: "%s, %s" % (x,y), [a[2] for a in serialize_args])
+
+ # calls in order to free dyn. all. memory
+ free_calls = []
+
+ _c(' ')
+ if not self.var_followed_by_fixed_fields:
+ _c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
+ _c(' xcb_parts[2].iov_len = sizeof(xcb_out);')
+ _c(' xcb_parts[3].iov_base = 0;')
+ _c(' xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;')
+
+ count = 4
+
+ for field in param_fields:
+ if not field.type.fixed_size():
+ _c(' /* %s %s */', field.type.c_type, field.c_field_name)
+ # default: simple cast to char *
+ if not field.type.need_serialize and not field.type.need_sizeof:
+ _c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
+ if field.type.is_list:
+ if field.type.member.fixed_size():
+ _c(' xcb_parts[%d].iov_len = %s * sizeof(%s);', count,
+ _c_accessor_get_expr(field.type.expr, None),
+ field.type.member.c_wiretype)
+ else:
+ list_length = _c_accessor_get_expr(field.type.expr, None)
+
+ length = ''
+ _c(" xcb_parts[%d].iov_len = 0;" % count)
+ _c(" xcb_tmp = (char *)%s;", field.c_field_name)
+ _c(" for(i=0; i<%s; i++) {" % list_length)
+ _c(" xcb_tmp_len = %s(xcb_tmp);" %
+ (field.type.c_sizeof_name))
+ _c(" xcb_parts[%d].iov_len += xcb_tmp_len;" % count)
+ _c(" xcb_tmp += xcb_tmp_len;")
+ _c(" }")
+ else:
+ # not supposed to happen
+ raise Exception("unhandled variable size field %s" % field.c_field_name)
+ else:
+ if not aux:
+ _c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
+ idx = serial_fields.index(field)
+ aux_var = '&xcb_aux%d' % idx
+ context = 'serialize' if aux else 'sizeof'
+ _c(' xcb_parts[%d].iov_len = ', count)
+ if aux:
+ serialize_args = get_serialize_args(field.type, aux_var, field.c_field_name, context)
+ _c(' %s (%s);', field.type.c_serialize_name, serialize_args)
+ _c(' xcb_parts[%d].iov_base = xcb_aux%d;' % (count, idx))
+ free_calls.append(' free(xcb_aux%d);' % idx)
+ else:
+ serialize_args = get_serialize_args(field.type, field.c_field_name, aux_var, context)
+ func_name = field.type.c_sizeof_name
+ _c(' %s (%s);', func_name, serialize_args)
+
+ count += 1
+ if not (field.type.need_serialize or field.type.need_sizeof):
+ # the _serialize() function keeps track of padding automatically
+ _c(' xcb_parts[%d].iov_base = 0;', count)
+ _c(' xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count, count-1)
+ count += 1
+
+ # elif self.var_followed_by_fixed_fields:
+ else:
+ _c(' xcb_parts[2].iov_base = (char *) &xcb_out;')
+ # request header: opcodes + length
+ _c(' xcb_parts[2].iov_len = 2*sizeof(uint8_t) + sizeof(uint16_t);')
+ count += 1
+ # call _serialize()
+ buffer_var = '&xcb_aux'
+ serialize_args = get_serialize_args(self, buffer_var, '&xcb_out', 'serialize')
+ _c(' xcb_parts[%d].iov_len = %s (%s);', count, self.c_serialize_name, serialize_args)
+ _c(' xcb_parts[%d].iov_base = (char *) xcb_aux;', count)
+ free_calls.append(' free(xcb_aux);')
+ # no padding necessary - _serialize() keeps track of padding automatically
+
+ _c(' ')
+ _c(' xcb_ret.sequence = xcb_send_request(c, %s, xcb_parts + 2, &xcb_req);', func_flags)
+
+ # free dyn. all. data, if any
+ for f in free_calls:
+ _c(f)
+ _c(' return xcb_ret;')
+ _c('}')
+
+def _c_reply(self, name):
+ '''
+ Declares the function that returns the reply structure.
+ '''
+ spacing1 = ' ' * (len(self.c_cookie_type) - len('xcb_connection_t'))
+ spacing2 = ' ' * (len(self.c_cookie_type) - len('xcb_generic_error_t'))
+ spacing3 = ' ' * (len(self.c_reply_name) + 2)
+
+ # check if _unserialize() has to be called for any field
+ def look_for_special_cases(complex_obj):
+ unserialize_fields = []
+ # no unserialize call in case of switch
+ if not complex_obj.is_switch:
+ for field in complex_obj.fields:
+ # three cases: 1. field with special case
+ # 2. container that contains special case field
+ # 3. list with special case elements
+ if field.type.var_followed_by_fixed_fields:
+ unserialize_fields.append(field)
+ elif field.type.is_container:
+ unserialize_fields += look_for_special_cases(field.type)
+ elif field.type.is_list:
+ if field.type.member.var_followed_by_fixed_fields:
+ unserialize_fields.append(field)
+ if field.type.member.is_container:
+ unserialize_fields += look_for_special_cases(field.type.member)
+ return unserialize_fields
+
+ unserialize_fields = look_for_special_cases(self.reply)
+
+ _h('')
+ _h('/**')
+ _h(' * Return the reply')
+ _h(' * @param c The connection')
+ _h(' * @param cookie The cookie')
+ _h(' * @param e The xcb_generic_error_t supplied')
+ _h(' *')
+ _h(' * Returns the reply of the request asked by')
+ _h(' * ')
+ _h(' * The parameter @p e supplied to this function must be NULL if')
+ _h(' * %s(). is used.', self.c_unchecked_name)
+ _h(' * Otherwise, it stores the error if any.')
+ _h(' *')
+ _h(' * The returned value must be freed by the caller using free().')
+ _h(' */')
+ _c('')
+ _hc('')
+ _hc('/*****************************************************************************')
+ _hc(' **')
+ _hc(' ** %s * %s', self.c_reply_type, self.c_reply_name)
+ _hc(' ** ')
+ _hc(' ** @param xcb_connection_t%s *c', spacing1)
+ _hc(' ** @param %s cookie', self.c_cookie_type)
+ _hc(' ** @param xcb_generic_error_t%s **e', spacing2)
+ _hc(' ** @returns %s *', self.c_reply_type)
+ _hc(' **')
+ _hc(' *****************************************************************************/')
+ _hc(' ')
+ _hc('%s *', self.c_reply_type)
+ _hc('%s (xcb_connection_t%s *c /**< */,', self.c_reply_name, spacing1)
+ _hc('%s%s cookie /**< */,', spacing3, self.c_cookie_type)
+ _h('%sxcb_generic_error_t%s **e /**< */);', spacing3, spacing2)
+ _c('%sxcb_generic_error_t%s **e /**< */)', spacing3, spacing2)
+ _c('{')
+
+ if len(unserialize_fields)>0:
+ # certain variable size fields need to be unserialized explicitly
+ _c(' %s *reply = (%s *) xcb_wait_for_reply(c, cookie.sequence, e);',
+ self.c_reply_type, self.c_reply_type)
+ _c(' int i;')
+ for field in unserialize_fields:
+ if field.type.is_list:
+ _c(' %s %s_iter = %s(reply);', field.c_iterator_type, field.c_field_name, field.c_iterator_name)
+ _c(' int %s_len = %s(reply);', field.c_field_name, field.c_length_name)
+ _c(' %s *%s_data;', field.c_field_type, field.c_field_name)
+ else:
+ raise Exception('not implemented: call _unserialize() in reply for non-list type %s', field.c_field_type)
+ # call _unserialize(), using the reply as source and target buffer
+ _c(' /* special cases: transform parts of the reply to match XCB data structures */')
+ for field in unserialize_fields:
+ if field.type.is_list:
+ _c(' for(i=0; i<%s_len; i++) {', field.c_field_name)
+ _c(' %s_data = %s_iter.data;', field.c_field_name, field.c_field_name)
+ _c(' %s((const void *)%s_data, &%s_data);', field.type.c_unserialize_name,
+ field.c_field_name, field.c_field_name)
+ _c(' %s(&%s_iter);', field.type.c_next_name, field.c_field_name)
+ _c(' }')
+ # return the transformed reply
+ _c(' return reply;')
+
+ else:
+ _c(' return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)
+
+ _c('}')
+
+def _c_opcode(name, opcode):
+ '''
+ Declares the opcode define for requests, events, and errors.
+ '''
+ _h_setlevel(0)
+ _h('')
+ _h('/** Opcode for %s. */', _n(name))
+ _h('#define %s %s', _n(name).upper(), opcode)
+
+def _c_cookie(self, name):
+ '''
+ Declares the cookie type for a non-void request.
+ '''
+ _h_setlevel(0)
+ _h('')
+ _h('/**')
+ _h(' * @brief %s', self.c_cookie_type)
+ _h(' **/')
+ _h('typedef struct %s {', self.c_cookie_type)
+ _h(' unsigned int sequence; /**< */')
+ _h('} %s;', self.c_cookie_type)
+
+def c_request(self, name):
+ '''
+ Exported function that handles request declarations.
+ '''
+ _c_type_setup(self, name, ('request',))
+
+ if self.reply:
+ # Cookie type declaration
+ _c_cookie(self, name)
+
+ # Opcode define
+ _c_opcode(name, self.opcode)
+
+ # Request structure declaration
+ _c_complex(self)
+
+ if self.reply:
+ _c_type_setup(self.reply, name, ('reply',))
+ # Reply structure definition
+ _c_complex(self.reply)
+ # Request prototypes
+ _c_request_helper(self, name, self.c_cookie_type, False, True)
+ _c_request_helper(self, name, self.c_cookie_type, False, False)
+ if self.need_aux:
+ _c_request_helper(self, name, self.c_cookie_type, False, True, True)
+ _c_request_helper(self, name, self.c_cookie_type, False, False, True)
+ # Reply accessors
+ _c_accessors(self.reply, name + ('reply',), name)
+ _c_reply(self, name)
+ else:
+ # Request prototypes
+ _c_request_helper(self, name, 'xcb_void_cookie_t', True, False)
+ _c_request_helper(self, name, 'xcb_void_cookie_t', True, True)
+ if self.need_aux:
+ _c_request_helper(self, name, 'xcb_void_cookie_t', True, False, True)
+ _c_request_helper(self, name, 'xcb_void_cookie_t', True, True, True)
+
+
+def c_event(self, name):
+ '''
+ Exported function that handles event declarations.
+ '''
+ _c_type_setup(self, name, ('event',))
+
+ # Opcode define
+ _c_opcode(name, self.opcodes[name])
+
+ if self.name == name:
+ # Structure definition
+ _c_complex(self)
+ else:
+ # Typedef
+ _h('')
+ _h('typedef %s %s;', _t(self.name + ('event',)), _t(name + ('event',)))
+
+def c_error(self, name):
+ '''
+ Exported function that handles error declarations.
+ '''
+ _c_type_setup(self, name, ('error',))
+
+ # Opcode define
+ _c_opcode(name, self.opcodes[name])
+
+ if self.name == name:
+ # Structure definition
+ _c_complex(self)
+ else:
+ # Typedef
+ _h('')
+ _h('typedef %s %s;', _t(self.name + ('error',)), _t(name + ('error',)))
+
+
+# Main routine starts here
+
+# Must create an "output" dictionary before any xcbgen imports.
+output = {'open' : c_open,
+ 'close' : c_close,
+ 'simple' : c_simple,
+ 'enum' : c_enum,
+ 'struct' : c_struct,
+ 'union' : c_union,
+ 'request' : c_request,
+ 'event' : c_event,
+ 'error' : c_error,
+ }
+
+# Boilerplate below this point
+
+# Check for the argument that specifies path to the xcbgen python package.
+try:
+ opts, args = getopt.getopt(sys.argv[1:], 'p:')
+except getopt.GetoptError, err:
+ print str(err)
+ print 'Usage: c_client.py [-p path] file.xml'
+ sys.exit(1)
+
+for (opt, arg) in opts:
+ if opt == '-p':
+ sys.path.append(arg)
+
+# Import the module class
+try:
+ from xcbgen.state import Module
+except ImportError:
+ print ''
+ print 'Failed to load the xcbgen Python package!'
+ print 'Make sure that xcb/proto installed it on your Python path.'
+ print 'If not, you will need to create a .pth file or define $PYTHONPATH'
+ print 'to extend the path.'
+ print 'Refer to the README file in xcb/proto for more info.'
+ print ''
+ raise
+
+# Parse the xml header
+module = Module(args[0], output)
+
+# Build type-registry and resolve type dependencies
+module.register()
+module.resolve()
+
+# Output the code
+module.generate()
diff --git a/libxcb/src/xcb_util.c b/libxcb/src/xcb_util.c
index 538fdf460..e5b874e38 100644
--- a/libxcb/src/xcb_util.c
+++ b/libxcb/src/xcb_util.c
@@ -55,6 +55,9 @@
#include "xcbint.h"
#ifdef _MSC_VER
+#ifdef close
+#undef close
+#endif
#define close(fd) closesocket(fd)
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 07:31:04 +0000