1 files changed, 450 insertions, 0 deletions
diff --git a/mesalib/src/mapi/glapi/gen-es/gl_parse_header.py b/mesalib/src/mapi/glapi/gen-es/gl_parse_header.py
new file mode 100644
index 000000000..5382eba35
--- /dev/null
+++ b/mesalib/src/mapi/glapi/gen-es/gl_parse_header.py
@@ -0,0 +1,450 @@
+#!/usr/bin/python
+#
+# Copyright (C) 2009 Chia-I Wu <olv@0xlab.org>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# on the rights to use, copy, modify, merge, publish, distribute, sub
+# license, and/or sell copies of the Software, and to permit persons to whom
+# the Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+import sys
+import os.path
+import getopt
+import re
+
+GLAPI = "../../glapi/gen"
+sys.path.append(GLAPI)
+
+class HeaderParser(object):
+    """Parser for GL header files."""
+
+    def __init__(self, verbose=0):
+        # match #if and #ifdef
+        self.IFDEF = re.compile('#\s*if(n?def\s+(?P<ifdef>\w+)|\s+(?P<if>.+))')
+        # match #endif
+        self.ENDIF = re.compile('#\s*endif')
+        # match typedef abc def;
+        self.TYPEDEF = re.compile('typedef\s+(?P<from>[\w ]+)\s+(?P<to>\w+);')
+        # match #define XYZ VAL
+        self.DEFINE = re.compile('#\s*define\s+(?P<key>\w+)(?P<value>\s+[\w"]*)?')
+        # match GLAPI
+        self.GLAPI = re.compile('^GL_?API(CALL)?\s+(?P<return>[\w\s*]+[\w*])\s+(GL)?_?APIENTRY\s+(?P<name>\w+)\s*\((?P<params>[\w\s(,*\[\])]+)\)\s*;')
+
+        self.split_params = re.compile('\s*,\s*')
+        self.split_ctype = re.compile('(\W)')
+        # ignore GL_VERSION_X_Y
+        self.ignore_enum = re.compile('GL(_ES)?_VERSION(_ES_C[ML])?_\d_\d')
+
+        self.verbose = verbose
+        self._reset()
+
+    def _reset(self):
+        """Reset to initial state."""
+        self.ifdef_levels = []
+        self.need_char = False
+
+    # use typeexpr?
+    def _format_ctype(self, ctype, fix=True):
+        """Format a ctype string, optionally fix it."""
+        # split the type string
+        tmp = self.split_ctype.split(ctype)
+        tmp = [s for s in tmp if s and s != " "]
+
+        pretty = ""
+        for i in xrange(len(tmp)):
+            # add missing GL prefix
+            if (fix and tmp[i] != "const" and tmp[i] != "*" and
+                not tmp[i].startswith("GL")):
+                tmp[i] = "GL" + tmp[i]
+
+            if i == 0:
+                pretty = tmp[i]
+            else:
+                sep = " "
+                if tmp[i - 1] == "*":
+                    sep = ""
+                pretty += sep + tmp[i]
+        return pretty
+
+    # use typeexpr?
+    def _get_ctype_attrs(self, ctype):
+        """Get the attributes of a ctype."""
+        is_float = (ctype.find("float") != -1 or ctype.find("double") != -1)
+        is_signed = not (ctype.find("unsigned")  != -1)
+
+        size = 0
+        if ctype.find("char") != -1:
+            size = 1
+        elif ctype.find("short") != -1:
+            size = 2
+        elif ctype.find("int") != -1:
+            size = 4
+        elif is_float:
+            if ctype.find("float") != -1:
+                size = 4
+            else:
+                size = 8
+
+        return (size, is_float, is_signed)
+
+    def _parse_define(self, line):
+        """Parse a #define line for an <enum>."""
+        m = self.DEFINE.search(line)
+        if not m:
+            if self.verbose and line.find("#define") >= 0:
+                print "ignore %s" % (line)
+            return None
+
+        key = m.group("key").strip()
+        val = m.group("value").strip()
+
+        # enum must begin with GL_ and be all uppercase
+        if ((not (key.startswith("GL_") and key.isupper())) or
+            (self.ignore_enum.match(key) and val == "1")):
+            if self.verbose:
+                print "ignore enum %s" % (key)
+            return None
+
+        return (key, val)
+
+    def _parse_typedef(self, line):
+        """Parse a typedef line for a <type>."""
+        m = self.TYPEDEF.search(line)
+        if not m:
+            if self.verbose and line.find("typedef") >= 0:
+                print "ignore %s" % (line)
+            return None
+
+        f = m.group("from").strip()
+        t = m.group("to").strip()
+        if not t.startswith("GL"):
+            if self.verbose:
+                print "ignore type %s" % (t)
+            return None
+        attrs = self._get_ctype_attrs(f)
+
+        return (f, t, attrs)
+
+    def _parse_gl_api(self, line):
+        """Parse a GLAPI line for a <function>."""
+        m = self.GLAPI.search(line)
+        if not m:
+            if self.verbose and line.find("APIENTRY") >= 0:
+                print "ignore %s" % (line)
+            return None
+
+        rettype = m.group("return")
+        rettype = self._format_ctype(rettype)
+        if rettype == "GLvoid":
+            rettype = ""
+
+        name = m.group("name")
+
+        param_str = m.group("params")
+        chunks = self.split_params.split(param_str)
+        chunks = [s.strip() for s in chunks]
+        if len(chunks) == 1 and (chunks[0] == "void" or chunks[0] == "GLvoid"):
+            chunks = []
+
+        params = []
+        for c in chunks:
+            # split type and variable name
+            idx = c.rfind("*")
+            if idx < 0:
+                idx = c.rfind(" ")
+            if idx >= 0:
+                idx += 1
+                ctype = c[:idx]
+                var = c[idx:]
+            else:
+                ctype = c
+                var = "unnamed"
+
+            # convert array to pointer
+            idx = var.find("[")
+            if idx >= 0:
+                var = var[:idx]
+                ctype += "*"
+
+            ctype = self._format_ctype(ctype)
+            var = var.strip()
+
+            if not self.need_char and ctype.find("GLchar") >= 0:
+                self.need_char = True
+
+            params.append((ctype, var))
+
+        return (rettype, name, params)
+
+    def _change_level(self, line):
+        """Parse a #ifdef line and change level."""
+        m = self.IFDEF.search(line)
+        if m:
+            ifdef = m.group("ifdef")
+            if not ifdef:
+                ifdef = m.group("if")
+            self.ifdef_levels.append(ifdef)
+            return True
+        m = self.ENDIF.search(line)
+        if m:
+            self.ifdef_levels.pop()
+            return True
+        return False
+
+    def _read_header(self, header):
+        """Open a header file and read its contents."""
+        lines = []
+        try:
+            fp = open(header, "rb")
+            lines = fp.readlines()
+            fp.close()
+        except IOError, e:
+            print "failed to read %s: %s" % (header, e)
+        return lines
+
+    def _cmp_enum(self, enum1, enum2):
+        """Compare two enums."""
+        # sort by length of the values as strings
+        val1 = enum1[1]
+        val2 = enum2[1]
+        ret = len(val1) - len(val2)
+        # sort by the values
+        if not ret:
+            val1 = int(val1, 16)
+            val2 = int(val2, 16)
+            ret = val1 - val2
+            # in case int cannot hold the result
+            if ret > 0:
+                ret = 1
+            elif ret < 0:
+                ret = -1
+        # sort by the names
+        if not ret:
+            if enum1[0] < enum2[0]:
+                ret = -1
+            elif enum1[0] > enum2[0]:
+                ret = 1
+        return ret
+
+    def _cmp_type(self, type1, type2):
+        """Compare two types."""
+        attrs1 = type1[2]
+        attrs2 = type2[2]
+        # sort by type size
+        ret = attrs1[0] - attrs2[0]
+        # float is larger
+        if not ret:
+            ret = attrs1[1] - attrs2[1]
+        # signed is larger
+        if not ret:
+            ret = attrs1[2] - attrs2[2]
+        # reverse
+        ret = -ret
+        return ret
+
+    def _cmp_function(self, func1, func2):
+        """Compare two functions."""
+        name1 = func1[1]
+        name2 = func2[1]
+        ret = 0
+        # sort by the names
+        if name1 < name2:
+            ret = -1
+        elif name1 > name2:
+            ret = 1
+        return ret
+
+    def _postprocess_dict(self, hdict):
+        """Post-process a header dict and return an ordered list."""
+        hlist = []
+        largest = 0
+        for key, cat in hdict.iteritems():
+            size = len(cat["enums"]) + len(cat["types"]) + len(cat["functions"])
+            # ignore empty category
+            if not size:
+                continue
+
+            cat["enums"].sort(self._cmp_enum)
+            # remove duplicates
+            dup = []
+            for i in xrange(1, len(cat["enums"])):
+                if cat["enums"][i] == cat["enums"][i - 1]:
+                    dup.insert(0, i)
+            for i in dup:
+                e = cat["enums"].pop(i)
+                if self.verbose:
+                    print "remove duplicate enum %s" % e[0]
+
+            cat["types"].sort(self._cmp_type)
+            cat["functions"].sort(self._cmp_function)
+
+            # largest category comes first
+            if size > largest:
+                hlist.insert(0, (key, cat))
+                largest = size
+            else:
+                hlist.append((key, cat))
+        return hlist
+
+    def parse(self, header):
+        """Parse a header file."""
+        self._reset()
+
+        if self.verbose:
+            print "Parsing %s" % (header)
+
+        hdict = {}
+        lines = self._read_header(header)
+        for line in lines:
+            if self._change_level(line):
+                continue
+
+            # skip until the first ifdef (i.e. __gl_h_)
+            if not self.ifdef_levels:
+                continue
+
+            cat_name = os.path.basename(header)
+            # check if we are in an extension
+            if (len(self.ifdef_levels) > 1 and
+                self.ifdef_levels[-1].startswith("GL_")):
+                cat_name = self.ifdef_levels[-1]
+
+            try:
+                cat = hdict[cat_name]
+            except KeyError:
+                cat = {
+                        "enums": [],
+                        "types": [],
+                        "functions": []
+                }
+                hdict[cat_name] = cat
+
+            key = "enums"
+            elem = self._parse_define(line)
+            if not elem:
+                key = "types"
+                elem = self._parse_typedef(line)
+            if not elem:
+                key = "functions"
+                elem = self._parse_gl_api(line)
+
+            if elem:
+                cat[key].append(elem)
+
+        if self.need_char:
+            if self.verbose:
+                print "define GLchar"
+            elem = self._parse_typedef("typedef char GLchar;")
+            cat["types"].append(elem)
+        return self._postprocess_dict(hdict)
+
+def spaces(n, str=""):
+    spaces = n - len(str)
+    if spaces < 1:
+        spaces = 1
+    return " " * spaces
+
+def output_xml(name, hlist):
+    """Output a parsed header in OpenGLAPI XML."""
+
+    for i in xrange(len(hlist)):
+        cat_name, cat = hlist[i]
+
+        print '<category name="%s">' % (cat_name)
+        indent = 4
+
+        for enum in cat["enums"]:
+            name = enum[0][3:]
+            value = enum[1]
+            tab = spaces(41, name)
+            attrs = 'name="%s"%svalue="%s"' % (name, tab, value)
+            print '%s<enum %s/>' % (spaces(indent), attrs)
+
+        if cat["enums"] and cat["types"]:
+            print
+
+        for type in cat["types"]:
+            ctype = type[0]
+            size, is_float, is_signed = type[2]
+
+            attrs = 'name="%s"' % (type[1][2:])
+            attrs += spaces(16, attrs) + 'size="%d"' % (size)
+            if is_float:
+                attrs += ' float="true"'
+            elif not is_signed:
+                attrs += ' unsigned="true"'
+
+            print '%s<type %s/>' % (spaces(indent), attrs)
+
+        for func in cat["functions"]:
+            print
+            ret = func[0]
+            name = func[1][2:]
+            params = func[2]
+
+            attrs = 'name="%s" offset="assign"' % name
+            print '%s<function %s>' % (spaces(indent), attrs)
+
+            for param in params:
+                attrs = 'name="%s" type="%s"' % (param[1], param[0])
+                print '%s<param %s/>' % (spaces(indent * 2), attrs)
+            if ret:
+                attrs = 'type="%s"' % ret
+                print '%s<return %s/>' % (spaces(indent * 2), attrs)
+
+            print '%s</function>' % spaces(indent)
+
+        print '</category>'
+        print
+
+def show_usage():
+    print "Usage: %s [-v] <header> ..." % sys.argv[0]
+    sys.exit(1)
+
+def main():
+    try:
+        args, headers = getopt.getopt(sys.argv[1:], "v")
+    except Exception, e:
+        show_usage()
+    if not headers:
+        show_usage()
+
+    verbose = 0
+    for arg in args:
+        if arg[0] == "-v":
+            verbose += 1
+
+    need_xml_header = True
+    parser = HeaderParser(verbose)
+    for h in headers:
+        h = os.path.abspath(h)
+        hlist = parser.parse(h)
+
+        if need_xml_header:
+            print '<?xml version="1.0"?>'
+            print '<!DOCTYPE OpenGLAPI SYSTEM "%s/gl_API.dtd">' % GLAPI
+            need_xml_header = False
+
+        print
+        print '<!-- %s -->' % (h)
+        print '<OpenGLAPI>'
+        print
+        output_xml(h, hlist)
+        print '</OpenGLAPI>'
+
+if __name__ == '__main__':
+    main()