svn merge ^/branches/released .

1 files changed, 0 insertions, 3032 deletions

diff --git a/mesalib/src/mesa/shader/slang/slang_compile.c b/mesalib/src/mesa/shader/slang/slang_compile.c
deleted file mode 100644
index ad8667615..000000000
--- a/mesalib/src/mesa/shader/slang/slang_compile.c
+++ /dev/null
@@ -1,3032 +0,0 @@
-/*
- * Mesa 3-D graphics library
- *
- * Copyright (C) 2005-2006  Brian Paul   All Rights Reserved.
- * Copyright (C) 2008 VMware, Inc.  All Rights Reserved.
- *
- * 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
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL 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.
- */
-
-/**
- * \file slang_compile.c
- * slang front-end compiler
- * \author Michal Krol
- */
-
-#include "main/imports.h"
-#include "main/context.h"
-#include "shader/program.h"
-#include "shader/programopt.h"
-#include "shader/prog_optimize.h"
-#include "shader/prog_print.h"
-#include "shader/prog_parameter.h"
-#include "../../glsl/pp/sl_pp_public.h"
-#include "../../glsl/cl/sl_cl_parse.h"
-#include "slang_codegen.h"
-#include "slang_compile.h"
-#include "slang_storage.h"
-#include "slang_log.h"
-#include "slang_mem.h"
-#include "slang_vartable.h"
-#include "slang_simplify.h"
-
-/*
- * This is a straightforward implementation of the slang front-end
- * compiler.  Lots of error-checking functionality is missing but
- * every well-formed shader source should compile successfully and
- * execute as expected. However, some semantically ill-formed shaders
- * may be accepted resulting in undefined behaviour.
- */
-
-
-/** re-defined below, should be the same though */
-#define TYPE_SPECIFIER_COUNT 36
-
-
-/**
- * Check if the given identifier is legal.
- */
-static GLboolean
-legal_identifier(slang_atom name)
-{
-   /* "gl_" is a reserved prefix */
-   if (strncmp((char *) name, "gl_", 3) == 0) {
-      return GL_FALSE;
-   }
-   return GL_TRUE;
-}
-
-
-/*
- * slang_code_unit
- */
-
-GLvoid
-_slang_code_unit_ctr(slang_code_unit * self,
-                     struct slang_code_object_ * object)
-{
-   _slang_variable_scope_ctr(&self->vars);
-   _slang_function_scope_ctr(&self->funs);
-   _slang_struct_scope_ctr(&self->structs);
-   self->object = object;
-}
-
-GLvoid
-_slang_code_unit_dtr(slang_code_unit * self)
-{
-   slang_variable_scope_destruct(&self->vars);
-   slang_function_scope_destruct(&self->funs);
-   slang_struct_scope_destruct(&self->structs);
-}
-
-/*
- * slang_code_object
- */
-
-GLvoid
-_slang_code_object_ctr(slang_code_object * self)
-{
-   GLuint i;
-
-   for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
-      _slang_code_unit_ctr(&self->builtin[i], self);
-   _slang_code_unit_ctr(&self->unit, self);
-   slang_atom_pool_construct(&self->atompool);
-}
-
-GLvoid
-_slang_code_object_dtr(slang_code_object * self)
-{
-   GLuint i;
-
-   for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
-      _slang_code_unit_dtr(&self->builtin[i]);
-   _slang_code_unit_dtr(&self->unit);
-   slang_atom_pool_destruct(&self->atompool);
-}
-
-
-/* slang_parse_ctx */
-
-typedef struct slang_parse_ctx_
-{
-   const unsigned char *I;
-   slang_info_log *L;
-   int parsing_builtin;
-   GLboolean global_scope;   /**< Is object being declared a global? */
-   slang_atom_pool *atoms;
-   slang_unit_type type;     /**< Vertex vs. Fragment */
-   GLuint version;           /**< user-specified (or default) #version */
-} slang_parse_ctx;
-
-/* slang_output_ctx */
-
-typedef struct slang_output_ctx_
-{
-   slang_variable_scope *vars;
-   slang_function_scope *funs;
-   slang_struct_scope *structs;
-   struct gl_program *program;
-   struct gl_sl_pragmas *pragmas;
-   slang_var_table *vartable;
-   GLuint default_precision[TYPE_SPECIFIER_COUNT];
-   GLboolean allow_precision;
-   GLboolean allow_invariant;
-   GLboolean allow_centroid;
-   GLboolean allow_array_types;  /* float[] syntax */
-} slang_output_ctx;
-
-/* _slang_compile() */
-
-
-/* Debugging aid, print file/line where parsing error is detected */
-#define RETURN0 \
-   do { \
-      if (0) \
-         printf("slang error at %s:%d\n", __FILE__, __LINE__); \
-      return 0; \
-   } while (0)
-
-
-static void
-parse_identifier_str(slang_parse_ctx * C, char **id)
-{
-   *id = (char *) C->I;
-   C->I += strlen(*id) + 1;
-}
-
-static slang_atom
-parse_identifier(slang_parse_ctx * C)
-{
-   const char *id;
-
-   id = (const char *) C->I;
-   C->I += strlen(id) + 1;
-   return slang_atom_pool_atom(C->atoms, id);
-}
-
-static int
-is_hex_digit(char c)
-{
-   return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
-}
-
-static int
-parse_general_number(slang_parse_ctx *ctx, float *number)
-{
-   char *flt = NULL;
-
-   if (*ctx->I == '0') {
-      int value = 0;
-      const unsigned char *pi;
-
-      if (ctx->I[1] == 'x' || ctx->I[1] == 'X') {
-         ctx->I += 2;
-         if (!is_hex_digit(*ctx->I)) {
-            return 0;
-         }
-         do {
-            int digit;
-
-            if (*ctx->I >= '0' && *ctx->I <= '9') {
-               digit = (int)(*ctx->I - '0');
-            } else if (*ctx->I >= 'a' && *ctx->I <= 'f') {
-               digit = (int)(*ctx->I - 'a') + 10;
-            } else {
-               digit = (int)(*ctx->I - 'A') + 10;
-            }
-            value = value * 0x10 + digit;
-            ctx->I++;
-         } while (is_hex_digit(*ctx->I));
-         if (*ctx->I != '\0') {
-            return 0;
-         }
-         ctx->I++;
-         *number = (float)value;
-         return 1;
-      }
-
-      pi = ctx->I;
-      pi++;
-      while (*pi >= '0' && *pi <= '7') {
-         int digit;
-
-         digit = (int)(*pi - '0');
-         value = value * 010 + digit;
-         pi++;
-      }
-      if (*pi == '\0') {
-         pi++;
-         ctx->I = pi;
-         *number = (float)value;
-         return 1;
-      }
-   }
-
-   parse_identifier_str(ctx, &flt);
-   flt = _mesa_strdup(flt);
-   if (!flt) {
-      return 0;
-   }
-   if (flt[strlen(flt) - 1] == 'f' || flt[strlen(flt) - 1] == 'F') {
-      flt[strlen(flt) - 1] = '\0';
-   }
-   *number = _mesa_strtof(flt, (char **)NULL);
-   free(flt);
-
-   return 1;
-}
-
-static int
-parse_number(slang_parse_ctx * C, int *number)
-{
-   const int radix = (int) (*C->I++);
-
-   if (radix == 1) {
-      float f = 0.0f;
-
-      parse_general_number(C, &f);
-      *number = (int)f;
-   } else {
-      *number = 0;
-      while (*C->I != '\0') {
-         int digit;
-         if (*C->I >= '0' && *C->I <= '9')
-            digit = (int) (*C->I - '0');
-         else if (*C->I >= 'A' && *C->I <= 'Z')
-            digit = (int) (*C->I - 'A') + 10;
-         else
-            digit = (int) (*C->I - 'a') + 10;
-         *number = *number * radix + digit;
-         C->I++;
-      }
-      C->I++;
-   }
-   if (*number > 65535)
-      slang_info_log_warning(C->L, "%d: literal integer overflow.", *number);
-   return 1;
-}
-
-static int
-parse_float(slang_parse_ctx * C, float *number)
-{
-   if (*C->I == 1) {
-      C->I++;
-      parse_general_number(C, number);
-   } else {
-      char *integral = NULL;
-      char *fractional = NULL;
-      char *exponent = NULL;
-      char *whole = NULL;
-
-      parse_identifier_str(C, &integral);
-      parse_identifier_str(C, &fractional);
-      parse_identifier_str(C, &exponent);
-
-      whole = (char *) _slang_alloc((strlen(integral) +
-                                     strlen(fractional) +
-                                     strlen(exponent) + 3) * sizeof(char));
-      if (whole == NULL) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-
-      slang_string_copy(whole, integral);
-      slang_string_concat(whole, ".");
-      slang_string_concat(whole, fractional);
-      slang_string_concat(whole, "E");
-      slang_string_concat(whole, exponent);
-
-      *number = _mesa_strtof(whole, (char **) NULL);
-
-      _slang_free(whole);
-   }
-
-   return 1;
-}
-
-/* revision number - increment after each change affecting emitted output */
-#define REVISION 5
-
-static int
-check_revision(slang_parse_ctx * C)
-{
-   if (*C->I != REVISION) {
-      slang_info_log_error(C->L, "Internal compiler error.");
-      RETURN0;
-   }
-   C->I++;
-   return 1;
-}
-
-static int parse_statement(slang_parse_ctx *, slang_output_ctx *,
-                           slang_operation *);
-static int parse_expression(slang_parse_ctx *, slang_output_ctx *,
-                            slang_operation *);
-static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *,
-                                slang_type_specifier *);
-static int
-parse_type_array_size(slang_parse_ctx *C,
-                      slang_output_ctx *O,
-                      GLint *array_len);
-
-static GLboolean
-parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len)
-{
-   slang_operation array_size;
-   slang_name_space space;
-   GLboolean result;
-
-   if (!slang_operation_construct(&array_size))
-      return GL_FALSE;
-   if (!parse_expression(C, O, &array_size)) {
-      slang_operation_destruct(&array_size);
-      return GL_FALSE;
-   }
-
-   space.funcs = O->funs;
-   space.structs = O->structs;
-   space.vars = O->vars;
-
-   /* evaluate compile-time expression which is array size */
-   _slang_simplify(&array_size, &space, C->atoms);
-
-   if (array_size.type == SLANG_OPER_LITERAL_INT) {
-      result = GL_TRUE;
-      *len = (GLint) array_size.literal[0];
-   } else if (array_size.type == SLANG_OPER_IDENTIFIER) {
-      slang_variable *var = _slang_variable_locate(array_size.locals, array_size.a_id, GL_TRUE);
-      if (!var) {
-         slang_info_log_error(C->L, "undefined variable '%s'",
-                              (char *) array_size.a_id);
-         result = GL_FALSE;
-      } else if (var->type.qualifier == SLANG_QUAL_CONST &&
-                 var->type.specifier.type == SLANG_SPEC_INT) {
-         if (var->initializer &&
-             var->initializer->type == SLANG_OPER_LITERAL_INT) {
-            *len = (GLint) var->initializer->literal[0];
-            result = GL_TRUE;
-         } else {
-            slang_info_log_error(C->L, "unable to parse array size declaration");
-            result = GL_FALSE;
-         }
-      } else {
-         slang_info_log_error(C->L, "unable to parse array size declaration");
-         result = GL_FALSE;
-      }
-   } else {
-      result = GL_FALSE;
-   }
-
-   slang_operation_destruct(&array_size);
-   return result;
-}
-
-static GLboolean
-calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O,
-                   slang_variable * var)
-{
-   slang_storage_aggregate agg;
-
-   if (!slang_storage_aggregate_construct(&agg))
-      return GL_FALSE;
-   if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len,
-                                  O->funs, O->structs, O->vars, C->atoms)) {
-      slang_storage_aggregate_destruct(&agg);
-      return GL_FALSE;
-   }
-   var->size = _slang_sizeof_aggregate(&agg);
-   slang_storage_aggregate_destruct(&agg);
-   return GL_TRUE;
-}
-
-static void
-promote_type_to_array(slang_parse_ctx *C,
-                      slang_fully_specified_type *type,
-                      GLint array_len)
-{
-   slang_type_specifier *baseType =
-      slang_type_specifier_new(type->specifier.type, NULL, NULL);
-
-   type->specifier.type = SLANG_SPEC_ARRAY;
-   type->specifier._array = baseType;
-   type->array_len = array_len;
-}
-
-
-static GLboolean
-convert_to_array(slang_parse_ctx * C, slang_variable * var,
-                 const slang_type_specifier * sp)
-{
-   /* sized array - mark it as array, copy the specifier to the array element
-    * and parse the expression */
-   var->type.specifier.type = SLANG_SPEC_ARRAY;
-   var->type.specifier._array = (slang_type_specifier *)
-      _slang_alloc(sizeof(slang_type_specifier));
-   if (var->type.specifier._array == NULL) {
-      slang_info_log_memory(C->L);
-      return GL_FALSE;
-   }
-   slang_type_specifier_ctr(var->type.specifier._array);
-   return slang_type_specifier_copy(var->type.specifier._array, sp);
-}
-
-/* structure field */
-#define FIELD_NONE 0
-#define FIELD_NEXT 1
-#define FIELD_ARRAY 2
-
-static GLboolean
-parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O,
-                       slang_variable * var, slang_atom a_name,
-                       const slang_type_specifier * sp,
-                       GLuint array_len)
-{
-   var->a_name = a_name;
-   if (var->a_name == SLANG_ATOM_NULL)
-      return GL_FALSE;
-
-   switch (*C->I++) {
-   case FIELD_NONE:
-      if (array_len != -1) {
-         if (!convert_to_array(C, var, sp))
-            return GL_FALSE;
-         var->array_len = array_len;
-      }
-      else {
-         if (!slang_type_specifier_copy(&var->type.specifier, sp))
-            return GL_FALSE;
-      }
-      break;
-   case FIELD_ARRAY:
-      if (array_len != -1)
-         return GL_FALSE;
-      if (!convert_to_array(C, var, sp))
-         return GL_FALSE;
-      if (!parse_array_len(C, O, &var->array_len))
-         return GL_FALSE;
-      break;
-   default:
-      return GL_FALSE;
-   }
-
-   return calculate_var_size(C, O, var);
-}
-
-static int
-parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
-                   slang_struct * st, slang_type_specifier * sp)
-{
-   slang_output_ctx o = *O;
-   GLint array_len;
-
-   o.structs = st->structs;
-   if (!parse_type_specifier(C, &o, sp))
-      RETURN0;
-   if (!parse_type_array_size(C, &o, &array_len))
-      RETURN0;
-
-   do {
-      slang_atom a_name;
-      slang_variable *var = slang_variable_scope_grow(st->fields);
-      if (!var) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      a_name = parse_identifier(C);
-      if (_slang_variable_locate(st->fields, a_name, GL_FALSE)) {
-         slang_info_log_error(C->L, "duplicate field '%s'", (char *) a_name);
-         RETURN0;
-      }
-
-      if (!parse_struct_field_var(C, &o, var, a_name, sp, array_len))
-         RETURN0;
-   }
-   while (*C->I++ != FIELD_NONE);
-
-   return 1;
-}
-
-static int
-parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st)
-{
-   slang_atom a_name;
-   const char *name;
-
-   /* parse struct name (if any) and make sure it is unique in current scope */
-   a_name = parse_identifier(C);
-   if (a_name == SLANG_ATOM_NULL)
-      RETURN0;
-
-   name = slang_atom_pool_id(C->atoms, a_name);
-   if (name[0] != '\0'
-       && slang_struct_scope_find(O->structs, a_name, 0) != NULL) {
-      slang_info_log_error(C->L, "%s: duplicate type name.", name);
-      RETURN0;
-   }
-
-   /* set-up a new struct */
-   *st = (slang_struct *) _slang_alloc(sizeof(slang_struct));
-   if (*st == NULL) {
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-   if (!slang_struct_construct(*st)) {
-      _slang_free(*st);
-      *st = NULL;
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-   (**st).a_name = a_name;
-   (**st).structs->outer_scope = O->structs;
-
-   /* parse individual struct fields */
-   do {
-      slang_type_specifier sp;
-
-      slang_type_specifier_ctr(&sp);
-      if (!parse_struct_field(C, O, *st, &sp)) {
-         slang_type_specifier_dtr(&sp);
-         RETURN0;
-      }
-      slang_type_specifier_dtr(&sp);
-   }
-   while (*C->I++ != FIELD_NONE);
-
-   /* if named struct, copy it to current scope */
-   if (name[0] != '\0') {
-      slang_struct *s;
-
-      O->structs->structs =
-         (slang_struct *) _slang_realloc(O->structs->structs,
-                                         O->structs->num_structs
-                                         * sizeof(slang_struct),
-                                         (O->structs->num_structs + 1)
-                                         * sizeof(slang_struct));
-      if (O->structs->structs == NULL) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      s = &O->structs->structs[O->structs->num_structs];
-      if (!slang_struct_construct(s))
-         RETURN0;
-      O->structs->num_structs++;
-      if (!slang_struct_copy(s, *st))
-         RETURN0;
-   }
-
-   return 1;
-}
-
-
-/* invariant qualifer */
-#define TYPE_VARIANT    90
-#define TYPE_INVARIANT  91
-
-static int
-parse_type_variant(slang_parse_ctx * C, slang_type_variant *variant)
-{
-   GLuint invariant = *C->I++;
-   switch (invariant) {
-   case TYPE_VARIANT:
-      *variant = SLANG_VARIANT;
-      return 1;
-   case TYPE_INVARIANT:
-      *variant = SLANG_INVARIANT;
-      return 1;
-   default:
-      RETURN0;
-   }
-}
-
-
-/* centroid qualifer */
-#define TYPE_CENTER    95
-#define TYPE_CENTROID  96
-
-static int
-parse_type_centroid(slang_parse_ctx * C, slang_type_centroid *centroid)
-{
-   GLuint c = *C->I++;
-   switch (c) {
-   case TYPE_CENTER:
-      *centroid = SLANG_CENTER;
-      return 1;
-   case TYPE_CENTROID:
-      *centroid = SLANG_CENTROID;
-      return 1;
-   default:
-      RETURN0;
-   }
-}
-
-
-/* Layout qualifiers */
-#define LAYOUT_QUALIFIER_NONE                      0
-#define LAYOUT_QUALIFIER_UPPER_LEFT                1
-#define LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER      2
-
-static int
-parse_layout_qualifiers(slang_parse_ctx * C, slang_layout_qualifier *layout)
-{
-   *layout = 0x0;
-
-   /* the layout qualifiers come as a list of LAYOUT_QUALIFER_x tokens,
-    * terminated by LAYOUT_QUALIFIER_NONE.
-    */
-   while (1) {
-      GLuint c = *C->I++;
-      switch (c) {
-      case LAYOUT_QUALIFIER_NONE:
-         /* end of list of qualifiers */
-         return 1;
-      case LAYOUT_QUALIFIER_UPPER_LEFT:
-         *layout |= SLANG_LAYOUT_UPPER_LEFT_BIT;
-         break;
-      case LAYOUT_QUALIFIER_PIXEL_CENTER_INTEGER:
-         *layout |= SLANG_LAYOUT_PIXEL_CENTER_INTEGER_BIT;
-         break;
-      default:
-         assert(0 && "Bad layout qualifier");
-      }
-   }
-}
-
-
-/* type qualifier */
-#define TYPE_QUALIFIER_NONE 0
-#define TYPE_QUALIFIER_CONST 1
-#define TYPE_QUALIFIER_ATTRIBUTE 2
-#define TYPE_QUALIFIER_VARYING 3
-#define TYPE_QUALIFIER_UNIFORM 4
-#define TYPE_QUALIFIER_FIXEDOUTPUT 5
-#define TYPE_QUALIFIER_FIXEDINPUT 6
-
-static int
-parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual)
-{
-   GLuint qualifier = *C->I++;
-   switch (qualifier) {
-   case TYPE_QUALIFIER_NONE:
-      *qual = SLANG_QUAL_NONE;
-      break;
-   case TYPE_QUALIFIER_CONST:
-      *qual = SLANG_QUAL_CONST;
-      break;
-   case TYPE_QUALIFIER_ATTRIBUTE:
-      *qual = SLANG_QUAL_ATTRIBUTE;
-      break;
-   case TYPE_QUALIFIER_VARYING:
-      *qual = SLANG_QUAL_VARYING;
-      break;
-   case TYPE_QUALIFIER_UNIFORM:
-      *qual = SLANG_QUAL_UNIFORM;
-      break;
-   case TYPE_QUALIFIER_FIXEDOUTPUT:
-      *qual = SLANG_QUAL_FIXEDOUTPUT;
-      break;
-   case TYPE_QUALIFIER_FIXEDINPUT:
-      *qual = SLANG_QUAL_FIXEDINPUT;
-      break;
-   default:
-      RETURN0;
-   }
-   return 1;
-}
-
-/* type specifier */
-#define TYPE_SPECIFIER_VOID 0
-#define TYPE_SPECIFIER_BOOL 1
-#define TYPE_SPECIFIER_BVEC2 2
-#define TYPE_SPECIFIER_BVEC3 3
-#define TYPE_SPECIFIER_BVEC4 4
-#define TYPE_SPECIFIER_INT 5
-#define TYPE_SPECIFIER_IVEC2 6
-#define TYPE_SPECIFIER_IVEC3 7
-#define TYPE_SPECIFIER_IVEC4 8
-#define TYPE_SPECIFIER_FLOAT 9
-#define TYPE_SPECIFIER_VEC2 10
-#define TYPE_SPECIFIER_VEC3 11
-#define TYPE_SPECIFIER_VEC4 12
-#define TYPE_SPECIFIER_MAT2 13
-#define TYPE_SPECIFIER_MAT3 14
-#define TYPE_SPECIFIER_MAT4 15
-#define TYPE_SPECIFIER_SAMPLER1D 16
-#define TYPE_SPECIFIER_SAMPLER2D 17
-#define TYPE_SPECIFIER_SAMPLER3D 18
-#define TYPE_SPECIFIER_SAMPLERCUBE 19
-#define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
-#define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
-#define TYPE_SPECIFIER_SAMPLER2DRECT 22
-#define TYPE_SPECIFIER_SAMPLER2DRECTSHADOW 23
-#define TYPE_SPECIFIER_STRUCT 24
-#define TYPE_SPECIFIER_TYPENAME 25
-#define TYPE_SPECIFIER_MAT23 26
-#define TYPE_SPECIFIER_MAT32 27
-#define TYPE_SPECIFIER_MAT24 28
-#define TYPE_SPECIFIER_MAT42 29
-#define TYPE_SPECIFIER_MAT34 30
-#define TYPE_SPECIFIER_MAT43 31
-#define TYPE_SPECIFIER_SAMPLER_1D_ARRAY 32
-#define TYPE_SPECIFIER_SAMPLER_2D_ARRAY 33
-#define TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW 34
-#define TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW 35
-#define TYPE_SPECIFIER_COUNT 36
-
-static int
-parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O,
-                     slang_type_specifier * spec)
-{
-   int type = *C->I++;
-   switch (type) {
-   case TYPE_SPECIFIER_VOID:
-      spec->type = SLANG_SPEC_VOID;
-      break;
-   case TYPE_SPECIFIER_BOOL:
-      spec->type = SLANG_SPEC_BOOL;
-      break;
-   case TYPE_SPECIFIER_BVEC2:
-      spec->type = SLANG_SPEC_BVEC2;
-      break;
-   case TYPE_SPECIFIER_BVEC3:
-      spec->type = SLANG_SPEC_BVEC3;
-      break;
-   case TYPE_SPECIFIER_BVEC4:
-      spec->type = SLANG_SPEC_BVEC4;
-      break;
-   case TYPE_SPECIFIER_INT:
-      spec->type = SLANG_SPEC_INT;
-      break;
-   case TYPE_SPECIFIER_IVEC2:
-      spec->type = SLANG_SPEC_IVEC2;
-      break;
-   case TYPE_SPECIFIER_IVEC3:
-      spec->type = SLANG_SPEC_IVEC3;
-      break;
-   case TYPE_SPECIFIER_IVEC4:
-      spec->type = SLANG_SPEC_IVEC4;
-      break;
-   case TYPE_SPECIFIER_FLOAT:
-      spec->type = SLANG_SPEC_FLOAT;
-      break;
-   case TYPE_SPECIFIER_VEC2:
-      spec->type = SLANG_SPEC_VEC2;
-      break;
-   case TYPE_SPECIFIER_VEC3:
-      spec->type = SLANG_SPEC_VEC3;
-      break;
-   case TYPE_SPECIFIER_VEC4:
-      spec->type = SLANG_SPEC_VEC4;
-      break;
-   case TYPE_SPECIFIER_MAT2:
-      spec->type = SLANG_SPEC_MAT2;
-      break;
-   case TYPE_SPECIFIER_MAT3:
-      spec->type = SLANG_SPEC_MAT3;
-      break;
-   case TYPE_SPECIFIER_MAT4:
-      spec->type = SLANG_SPEC_MAT4;
-      break;
-   case TYPE_SPECIFIER_MAT23:
-      spec->type = SLANG_SPEC_MAT23;
-      break;
-   case TYPE_SPECIFIER_MAT32:
-      spec->type = SLANG_SPEC_MAT32;
-      break;
-   case TYPE_SPECIFIER_MAT24:
-      spec->type = SLANG_SPEC_MAT24;
-      break;
-   case TYPE_SPECIFIER_MAT42:
-      spec->type = SLANG_SPEC_MAT42;
-      break;
-   case TYPE_SPECIFIER_MAT34:
-      spec->type = SLANG_SPEC_MAT34;
-      break;
-   case TYPE_SPECIFIER_MAT43:
-      spec->type = SLANG_SPEC_MAT43;
-      break;
-   case TYPE_SPECIFIER_SAMPLER1D:
-      spec->type = SLANG_SPEC_SAMPLER_1D;
-      break;
-   case TYPE_SPECIFIER_SAMPLER2D:
-      spec->type = SLANG_SPEC_SAMPLER_2D;
-      break;
-   case TYPE_SPECIFIER_SAMPLER3D:
-      spec->type = SLANG_SPEC_SAMPLER_3D;
-      break;
-   case TYPE_SPECIFIER_SAMPLERCUBE:
-      spec->type = SLANG_SPEC_SAMPLER_CUBE;
-      break;
-   case TYPE_SPECIFIER_SAMPLER2DRECT:
-      spec->type = SLANG_SPEC_SAMPLER_RECT;
-      break;
-   case TYPE_SPECIFIER_SAMPLER1DSHADOW:
-      spec->type = SLANG_SPEC_SAMPLER_1D_SHADOW;
-      break;
-   case TYPE_SPECIFIER_SAMPLER2DSHADOW:
-      spec->type = SLANG_SPEC_SAMPLER_2D_SHADOW;
-      break;
-   case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
-      spec->type = SLANG_SPEC_SAMPLER_RECT_SHADOW;
-      break;
-   case TYPE_SPECIFIER_SAMPLER_1D_ARRAY:
-      spec->type = SLANG_SPEC_SAMPLER_1D_ARRAY;
-      break;
-   case TYPE_SPECIFIER_SAMPLER_2D_ARRAY:
-      spec->type = SLANG_SPEC_SAMPLER_2D_ARRAY;
-      break;
-   case TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW:
-      spec->type = SLANG_SPEC_SAMPLER_1D_ARRAY_SHADOW;
-      break;
-   case TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW:
-      spec->type = SLANG_SPEC_SAMPLER_2D_ARRAY_SHADOW;
-      break;
-   case TYPE_SPECIFIER_STRUCT:
-      spec->type = SLANG_SPEC_STRUCT;
-      if (!parse_struct(C, O, &spec->_struct))
-         RETURN0;
-      break;
-   case TYPE_SPECIFIER_TYPENAME:
-      spec->type = SLANG_SPEC_STRUCT;
-      {
-         slang_atom a_name;
-         slang_struct *stru;
-
-         a_name = parse_identifier(C);
-         if (a_name == NULL)
-            RETURN0;
-
-         stru = slang_struct_scope_find(O->structs, a_name, 1);
-         if (stru == NULL) {
-            slang_info_log_error(C->L, "undeclared type name '%s'",
-                                 slang_atom_pool_id(C->atoms, a_name));
-            RETURN0;
-         }
-
-         spec->_struct = (slang_struct *) _slang_alloc(sizeof(slang_struct));
-         if (spec->_struct == NULL) {
-            slang_info_log_memory(C->L);
-            RETURN0;
-         }
-         if (!slang_struct_construct(spec->_struct)) {
-            _slang_free(spec->_struct);
-            spec->_struct = NULL;
-            RETURN0;
-         }
-         if (!slang_struct_copy(spec->_struct, stru))
-            RETURN0;
-      }
-      break;
-   default:
-      RETURN0;
-   }
-   return 1;
-}
-
-#define TYPE_SPECIFIER_NONARRAY 0
-#define TYPE_SPECIFIER_ARRAY    1
-
-static int
-parse_type_array_size(slang_parse_ctx *C,
-                      slang_output_ctx *O,
-                      GLint *array_len)
-{
-   GLuint size;
-
-   switch (*C->I++) {
-   case TYPE_SPECIFIER_NONARRAY:
-      *array_len = -1; /* -1 = not an array */
-      break;
-   case TYPE_SPECIFIER_ARRAY:
-      if (!parse_array_len(C, O, &size))
-         RETURN0;
-      *array_len = (GLint) size;
-      break;
-   default:
-      assert(0);
-      RETURN0;
-   }
-   return 1;
-}
-
-#define PRECISION_DEFAULT 0
-#define PRECISION_LOW     1
-#define PRECISION_MEDIUM  2
-#define PRECISION_HIGH    3
-
-static int
-parse_type_precision(slang_parse_ctx *C,
-                     slang_type_precision *precision)
-{
-   GLint prec = *C->I++;
-   switch (prec) {
-   case PRECISION_DEFAULT:
-      *precision = SLANG_PREC_DEFAULT;
-      return 1;
-   case PRECISION_LOW:
-      *precision = SLANG_PREC_LOW;
-      return 1;
-   case PRECISION_MEDIUM:
-      *precision = SLANG_PREC_MEDIUM;
-      return 1;
-   case PRECISION_HIGH:
-      *precision = SLANG_PREC_HIGH;
-      return 1;
-   default:
-      RETURN0;
-   }
-}
-
-static int
-parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
-                           slang_fully_specified_type * type)
-{
-   if (!parse_layout_qualifiers(C, &type->layout))
-      RETURN0;
-
-   if (!parse_type_variant(C, &type->variant))
-      RETURN0;
-
-   if (!parse_type_centroid(C, &type->centroid))
-      RETURN0;
-
-   if (!parse_type_qualifier(C, &type->qualifier))
-      RETURN0;
-
-   if (!parse_type_precision(C, &type->precision))
-      RETURN0;
-
-   if (!parse_type_specifier(C, O, &type->specifier))
-      RETURN0;
-
-   if (!parse_type_array_size(C, O, &type->array_len))
-      RETURN0;
-
-   if (!O->allow_invariant && type->variant == SLANG_INVARIANT) {
-      slang_info_log_error(C->L,
-         "'invariant' keyword not allowed (perhaps set #version 120)");
-      RETURN0;
-   }
-
-   if (!O->allow_centroid && type->centroid == SLANG_CENTROID) {
-      slang_info_log_error(C->L,
-         "'centroid' keyword not allowed (perhaps set #version 120)");
-      RETURN0;
-   }
-   else if (type->centroid == SLANG_CENTROID &&
-            type->qualifier != SLANG_QUAL_VARYING) {
-      slang_info_log_error(C->L,
-         "'centroid' keyword only allowed for varying vars");
-      RETURN0;
-   }
-
-
-   /* need this?
-   if (type->qualifier != SLANG_QUAL_VARYING &&
-       type->variant == SLANG_INVARIANT) {
-      slang_info_log_error(C->L,
-                           "invariant qualifer only allowed for varying vars");
-      RETURN0;
-   }
-   */
-
-   if (O->allow_precision) {
-      if (type->precision == SLANG_PREC_DEFAULT) {
-         assert(type->specifier.type < TYPE_SPECIFIER_COUNT);
-         /* use the default precision for this datatype */
-         type->precision = O->default_precision[type->specifier.type];
-      }
-   }
-   else {
-      /* only default is allowed */
-      if (type->precision != SLANG_PREC_DEFAULT) {
-         slang_info_log_error(C->L, "precision qualifiers not allowed");
-         RETURN0;
-      }
-   }
-
-   if (!O->allow_array_types && type->array_len >= 0) {
-      slang_info_log_error(C->L, "first-class array types not allowed");
-      RETURN0;
-   }
-
-   if (type->array_len >= 0) {
-      /* convert type to array type (ex: convert "int" to "array of int" */
-      promote_type_to_array(C, type, type->array_len);
-   }
-
-   return 1;
-}
-
-/* operation */
-#define OP_END 0
-#define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
-#define OP_BLOCK_BEGIN_NEW_SCOPE 2
-#define OP_DECLARE 3
-#define OP_ASM 4
-#define OP_BREAK 5
-#define OP_CONTINUE 6
-#define OP_DISCARD 7
-#define OP_RETURN 8
-#define OP_EXPRESSION 9
-#define OP_IF 10
-#define OP_WHILE 11
-#define OP_DO 12
-#define OP_FOR 13
-#define OP_PUSH_VOID 14
-#define OP_PUSH_BOOL 15
-#define OP_PUSH_INT 16
-#define OP_PUSH_FLOAT 17
-#define OP_PUSH_IDENTIFIER 18
-#define OP_SEQUENCE 19
-#define OP_ASSIGN 20
-#define OP_ADDASSIGN 21
-#define OP_SUBASSIGN 22
-#define OP_MULASSIGN 23
-#define OP_DIVASSIGN 24
-/*#define OP_MODASSIGN 25*/
-/*#define OP_LSHASSIGN 26*/
-/*#define OP_RSHASSIGN 27*/
-/*#define OP_ORASSIGN 28*/
-/*#define OP_XORASSIGN 29*/
-/*#define OP_ANDASSIGN 30*/
-#define OP_SELECT 31
-#define OP_LOGICALOR 32
-#define OP_LOGICALXOR 33
-#define OP_LOGICALAND 34
-/*#define OP_BITOR 35*/
-/*#define OP_BITXOR 36*/
-/*#define OP_BITAND 37*/
-#define OP_EQUAL 38
-#define OP_NOTEQUAL 39
-#define OP_LESS 40
-#define OP_GREATER 41
-#define OP_LESSEQUAL 42
-#define OP_GREATEREQUAL 43
-/*#define OP_LSHIFT 44*/
-/*#define OP_RSHIFT 45*/
-#define OP_ADD 46
-#define OP_SUBTRACT 47
-#define OP_MULTIPLY 48
-#define OP_DIVIDE 49
-/*#define OP_MODULUS 50*/
-#define OP_PREINCREMENT 51
-#define OP_PREDECREMENT 52
-#define OP_PLUS 53
-#define OP_MINUS 54
-/*#define OP_COMPLEMENT 55*/
-#define OP_NOT 56
-#define OP_SUBSCRIPT 57
-#define OP_CALL 58
-#define OP_FIELD 59
-#define OP_POSTINCREMENT 60
-#define OP_POSTDECREMENT 61
-#define OP_PRECISION 62
-#define OP_METHOD 63
-
-
-/**
- * When parsing a compound production, this function is used to parse the
- * children.
- * For example, a while-loop compound will have two children, the
- * while condition expression and the loop body.  So, this function will
- * be called twice to parse those two sub-expressions.
- * \param C  the parsing context
- * \param O  the output context
- * \param oper  the operation we're parsing
- * \param statement  indicates whether parsing a statement, or expression
- * \return 1 if success, 0 if error
- */
-static int
-parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
-                      slang_operation * oper, GLboolean statement)
-{
-   slang_operation *ch;
-
-   /* grow child array */
-   ch = slang_operation_grow(&oper->num_children, &oper->children);
-   if (statement)
-      return parse_statement(C, O, ch);
-   return parse_expression(C, O, ch);
-}
-
-static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
-
-static int
-parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
-                slang_operation * oper)
-{
-   int op;
-
-   oper->locals->outer_scope = O->vars;
-
-   op = *C->I++;
-   switch (op) {
-   case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
-      /* parse child statements, do not create new variable scope */
-      oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
-      while (*C->I != OP_END)
-         if (!parse_child_operation(C, O, oper, GL_TRUE))
-            RETURN0;
-      C->I++;
-      break;
-   case OP_BLOCK_BEGIN_NEW_SCOPE:
-      /* parse child statements, create new variable scope */
-      {
-         slang_output_ctx o = *O;
-
-         oper->type = SLANG_OPER_BLOCK_NEW_SCOPE;
-         o.vars = oper->locals;
-         while (*C->I != OP_END)
-            if (!parse_child_operation(C, &o, oper, GL_TRUE))
-               RETURN0;
-         C->I++;
-      }
-      break;
-   case OP_DECLARE:
-      /* local variable declaration, individual declarators are stored as
-       * children identifiers
-       */
-      oper->type = SLANG_OPER_BLOCK_NO_NEW_SCOPE;
-      {
-         const unsigned int first_var = O->vars->num_variables;
-
-         /* parse the declaration, note that there can be zero or more
-          * than one declarators
-          */
-         if (!parse_declaration(C, O))
-            RETURN0;
-         if (first_var < O->vars->num_variables) {
-            const unsigned int num_vars = O->vars->num_variables - first_var;
-            unsigned int i;
-            assert(oper->num_children == 0);
-            oper->num_children = num_vars;
-            oper->children = slang_operation_new(num_vars);
-            if (oper->children == NULL) {
-               slang_info_log_memory(C->L);
-               RETURN0;
-            }
-            for (i = first_var; i < O->vars->num_variables; i++) {
-               slang_operation *o = &oper->children[i - first_var];
-               slang_variable *var = O->vars->variables[i];
-               o->type = SLANG_OPER_VARIABLE_DECL;
-               o->locals->outer_scope = O->vars;
-               o->a_id = var->a_name;
-
-               /* new/someday...
-               calculate_var_size(C, O, var);
-               */
-
-               if (!legal_identifier(o->a_id)) {
-                  slang_info_log_error(C->L, "illegal variable name '%s'",
-                                       (char *) o->a_id);
-                  RETURN0;
-               }
-            }
-         }
-      }
-      break;
-   case OP_ASM:
-      /* the __asm statement, parse the mnemonic and all its arguments
-       * as expressions
-       */
-      oper->type = SLANG_OPER_ASM;
-      oper->a_id = parse_identifier(C);
-      if (oper->a_id == SLANG_ATOM_NULL)
-         RETURN0;
-      while (*C->I != OP_END) {
-         if (!parse_child_operation(C, O, oper, GL_FALSE))
-            RETURN0;
-      }
-      C->I++;
-      break;
-   case OP_BREAK:
-      oper->type = SLANG_OPER_BREAK;
-      break;
-   case OP_CONTINUE:
-      oper->type = SLANG_OPER_CONTINUE;
-      break;
-   case OP_DISCARD:
-      oper->type = SLANG_OPER_DISCARD;
-      break;
-   case OP_RETURN:
-      oper->type = SLANG_OPER_RETURN;
-      if (!parse_child_operation(C, O, oper, GL_FALSE))
-         RETURN0;
-      break;
-   case OP_EXPRESSION:
-      oper->type = SLANG_OPER_EXPRESSION;
-      if (!parse_child_operation(C, O, oper, GL_FALSE))
-         RETURN0;
-      break;
-   case OP_IF:
-      oper->type = SLANG_OPER_IF;
-      if (!parse_child_operation(C, O, oper, GL_FALSE))
-         RETURN0;
-      if (!parse_child_operation(C, O, oper, GL_TRUE))
-         RETURN0;
-      if (!parse_child_operation(C, O, oper, GL_TRUE))
-         RETURN0;
-      break;
-   case OP_WHILE:
-      {
-         slang_output_ctx o = *O;
-
-         oper->type = SLANG_OPER_WHILE;
-         o.vars = oper->locals;
-         if (!parse_child_operation(C, &o, oper, GL_TRUE))
-            RETURN0;
-         if (!parse_child_operation(C, &o, oper, GL_TRUE))
-            RETURN0;
-      }
-      break;
-   case OP_DO:
-      oper->type = SLANG_OPER_DO;
-      if (!parse_child_operation(C, O, oper, GL_TRUE))
-         RETURN0;
-      if (!parse_child_operation(C, O, oper, GL_FALSE))
-         RETURN0;
-      break;
-   case OP_FOR:
-      {
-         slang_output_ctx o = *O;
-
-         oper->type = SLANG_OPER_FOR;
-         o.vars = oper->locals;
-         if (!parse_child_operation(C, &o, oper, GL_TRUE))
-            RETURN0;
-         if (!parse_child_operation(C, &o, oper, GL_TRUE))
-            RETURN0;
-         if (!parse_child_operation(C, &o, oper, GL_FALSE))
-            RETURN0;
-         if (!parse_child_operation(C, &o, oper, GL_TRUE))
-            RETURN0;
-      }
-      break;
-   case OP_PRECISION:
-      {
-         /* set default precision for a type in this scope */
-         /* ignored at this time */
-         int prec_qual = *C->I++;
-         int datatype = *C->I++;
-         (void) prec_qual;
-         (void) datatype;
-      }
-      break;
-   default:
-      /*printf("Unexpected operation %d\n", op);*/
-      RETURN0;
-   }
-   return 1;
-}
-
-static int
-handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
-                       slang_operation ** ops, unsigned int *total_ops,
-                       unsigned int n)
-{
-   unsigned int i;
-
-   op->children = slang_operation_new(n);
-   if (op->children == NULL) {
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-   op->num_children = n;
-
-   for (i = 0; i < n; i++) {
-      slang_operation_destruct(&op->children[i]);
-      op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
-   }
-
-   (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
-   *total_ops -= n;
-
-   *ops = (slang_operation *)
-      _slang_realloc(*ops,
-                     (*total_ops + n) * sizeof(slang_operation),
-                     *total_ops * sizeof(slang_operation));
-   if (*ops == NULL) {
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-   return 1;
-}
-
-static int
-is_constructor_name(const char *name, slang_atom a_name,
-                    slang_struct_scope * structs)
-{
-   if (slang_type_specifier_type_from_string(name) != SLANG_SPEC_VOID)
-      return 1;
-   return slang_struct_scope_find(structs, a_name, 1) != NULL;
-}
-
-#define FUNCTION_CALL_NONARRAY 0
-#define FUNCTION_CALL_ARRAY    1
-
-static int
-parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
-                 slang_operation * oper)
-{
-   slang_operation *ops = NULL;
-   unsigned int num_ops = 0;
-   int number;
-
-   while (*C->I != OP_END) {
-      slang_operation *op;
-      const unsigned int op_code = *C->I++;
-
-      /* allocate default operation, becomes a no-op if not used  */
-      ops = (slang_operation *)
-         _slang_realloc(ops,
-                        num_ops * sizeof(slang_operation),
-                        (num_ops + 1) * sizeof(slang_operation));
-      if (ops == NULL) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      op = &ops[num_ops];
-      if (!slang_operation_construct(op)) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      num_ops++;
-      op->locals->outer_scope = O->vars;
-
-      switch (op_code) {
-      case OP_PUSH_VOID:
-         op->type = SLANG_OPER_VOID;
-         break;
-      case OP_PUSH_BOOL:
-         op->type = SLANG_OPER_LITERAL_BOOL;
-         if (!parse_number(C, &number))
-            RETURN0;
-         op->literal[0] =
-         op->literal[1] =
-         op->literal[2] =
-         op->literal[3] = (GLfloat) number;
-         op->literal_size = 1;
-         break;
-      case OP_PUSH_INT:
-         op->type = SLANG_OPER_LITERAL_INT;
-         if (!parse_number(C, &number))
-            RETURN0;
-         op->literal[0] =
-         op->literal[1] =
-         op->literal[2] =
-         op->literal[3] = (GLfloat) number;
-         op->literal_size = 1;
-         break;
-      case OP_PUSH_FLOAT:
-         op->type = SLANG_OPER_LITERAL_FLOAT;
-         if (!parse_float(C, &op->literal[0]))
-            RETURN0;
-         op->literal[1] =
-         op->literal[2] =
-         op->literal[3] = op->literal[0];
-         op->literal_size = 1;
-         break;
-      case OP_PUSH_IDENTIFIER:
-         op->type = SLANG_OPER_IDENTIFIER;
-         op->a_id = parse_identifier(C);
-         if (op->a_id == SLANG_ATOM_NULL)
-            RETURN0;
-         break;
-      case OP_SEQUENCE:
-         op->type = SLANG_OPER_SEQUENCE;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_ASSIGN:
-         op->type = SLANG_OPER_ASSIGN;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_ADDASSIGN:
-         op->type = SLANG_OPER_ADDASSIGN;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_SUBASSIGN:
-         op->type = SLANG_OPER_SUBASSIGN;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_MULASSIGN:
-         op->type = SLANG_OPER_MULASSIGN;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_DIVASSIGN:
-         op->type = SLANG_OPER_DIVASSIGN;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-         /*case OP_MODASSIGN: */
-         /*case OP_LSHASSIGN: */
-         /*case OP_RSHASSIGN: */
-         /*case OP_ORASSIGN: */
-         /*case OP_XORASSIGN: */
-         /*case OP_ANDASSIGN: */
-      case OP_SELECT:
-         op->type = SLANG_OPER_SELECT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
-            RETURN0;
-         break;
-      case OP_LOGICALOR:
-         op->type = SLANG_OPER_LOGICALOR;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_LOGICALXOR:
-         op->type = SLANG_OPER_LOGICALXOR;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_LOGICALAND:
-         op->type = SLANG_OPER_LOGICALAND;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-         /*case OP_BITOR: */
-         /*case OP_BITXOR: */
-         /*case OP_BITAND: */
-      case OP_EQUAL:
-         op->type = SLANG_OPER_EQUAL;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_NOTEQUAL:
-         op->type = SLANG_OPER_NOTEQUAL;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_LESS:
-         op->type = SLANG_OPER_LESS;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_GREATER:
-         op->type = SLANG_OPER_GREATER;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_LESSEQUAL:
-         op->type = SLANG_OPER_LESSEQUAL;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_GREATEREQUAL:
-         op->type = SLANG_OPER_GREATEREQUAL;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-         /*case OP_LSHIFT: */
-         /*case OP_RSHIFT: */
-      case OP_ADD:
-         op->type = SLANG_OPER_ADD;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_SUBTRACT:
-         op->type = SLANG_OPER_SUBTRACT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_MULTIPLY:
-         op->type = SLANG_OPER_MULTIPLY;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_DIVIDE:
-         op->type = SLANG_OPER_DIVIDE;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-         /*case OP_MODULUS: */
-      case OP_PREINCREMENT:
-         op->type = SLANG_OPER_PREINCREMENT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_PREDECREMENT:
-         op->type = SLANG_OPER_PREDECREMENT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_PLUS:
-         op->type = SLANG_OPER_PLUS;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_MINUS:
-         op->type = SLANG_OPER_MINUS;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_NOT:
-         op->type = SLANG_OPER_NOT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-         /*case OP_COMPLEMENT: */
-      case OP_SUBSCRIPT:
-         op->type = SLANG_OPER_SUBSCRIPT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
-            RETURN0;
-         break;
-      case OP_METHOD:
-         op->type = SLANG_OPER_METHOD;
-         op->a_obj = parse_identifier(C);
-         if (op->a_obj == SLANG_ATOM_NULL)
-            RETURN0;
-
-         op->a_id = parse_identifier(C);
-         if (op->a_id == SLANG_ATOM_NULL)
-            RETURN0;
-
-         assert(*C->I == OP_END);
-         C->I++;
-
-         while (*C->I != OP_END)
-            if (!parse_child_operation(C, O, op, GL_FALSE))
-               RETURN0;
-         C->I++;
-#if 0
-         /* don't lookup the method (not yet anyway) */
-         if (!C->parsing_builtin
-             && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
-            const char *id;
-
-            id = slang_atom_pool_id(C->atoms, op->a_id);
-            if (!is_constructor_name(id, op->a_id, O->structs)) {
-               slang_info_log_error(C->L, "%s: undeclared function name.", id);
-               RETURN0;
-            }
-         }
-#endif
-         break;
-      case OP_CALL:
-         {
-            GLboolean array_constructor = GL_FALSE;
-            GLint array_constructor_size = 0;
-
-            op->type = SLANG_OPER_CALL;
-            op->a_id = parse_identifier(C);
-            if (op->a_id == SLANG_ATOM_NULL)
-               RETURN0;
-            switch (*C->I++) {
-            case FUNCTION_CALL_NONARRAY:
-               /* Nothing to do. */
-               break;
-            case FUNCTION_CALL_ARRAY:
-               /* Calling an array constructor. For example:
-                *   float[3](1.1, 2.2, 3.3);
-                */
-               if (!O->allow_array_types) {
-                  slang_info_log_error(C->L,
-                                       "array constructors not allowed "
-                                       "in this GLSL version");
-                  RETURN0;
-               }
-               else {
-                  /* parse the array constructor size */
-                  slang_operation array_size;
-                  array_constructor = GL_TRUE;
-                  slang_operation_construct(&array_size);
-                  if (!parse_expression(C, O, &array_size)) {
-                     slang_operation_destruct(&array_size);
-                     return GL_FALSE;
-                  }
-                  if (array_size.type != SLANG_OPER_LITERAL_INT) {
-                     slang_info_log_error(C->L,
-                        "constructor array size is not an integer");
-                     slang_operation_destruct(&array_size);
-                     RETURN0;
-                  }
-                  array_constructor_size = (int) array_size.literal[0];
-                  op->array_constructor = GL_TRUE;
-                  slang_operation_destruct(&array_size);
-               }
-               break;
-            default:
-               assert(0);
-               RETURN0;
-            }
-            while (*C->I != OP_END)
-               if (!parse_child_operation(C, O, op, GL_FALSE))
-                  RETURN0;
-            C->I++;
-
-            if (array_constructor &&
-                array_constructor_size != op->num_children) {
-               slang_info_log_error(C->L, "number of parameters to array"
-                                    " constructor does not match array size");
-               RETURN0;
-            }
-
-            if (!C->parsing_builtin
-                && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
-               const char *id;
-
-               id = slang_atom_pool_id(C->atoms, op->a_id);
-               if (!is_constructor_name(id, op->a_id, O->structs)) {
-                  slang_info_log_error(C->L, "%s: undeclared function name.", id);
-                  RETURN0;
-               }
-            }
-         }
-         break;
-      case OP_FIELD:
-         op->type = SLANG_OPER_FIELD;
-         op->a_id = parse_identifier(C);
-         if (op->a_id == SLANG_ATOM_NULL)
-            RETURN0;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_POSTINCREMENT:
-         op->type = SLANG_OPER_POSTINCREMENT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      case OP_POSTDECREMENT:
-         op->type = SLANG_OPER_POSTDECREMENT;
-         if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
-            RETURN0;
-         break;
-      default:
-         RETURN0;
-      }
-   }
-   C->I++;
-
-   slang_operation_destruct(oper);
-   *oper = *ops; /* struct copy */
-   _slang_free(ops);
-
-   return 1;
-}
-
-/* parameter qualifier */
-#define PARAM_QUALIFIER_IN 0
-#define PARAM_QUALIFIER_OUT 1
-#define PARAM_QUALIFIER_INOUT 2
-
-/* function parameter array presence */
-#define PARAMETER_ARRAY_NOT_PRESENT 0
-#define PARAMETER_ARRAY_PRESENT 1
-
-static int
-parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
-                            slang_variable * param)
-{
-   int param_qual, precision_qual;
-
-   /* parse and validate the parameter's type qualifiers (there can be
-    * two at most) because not all combinations are valid
-    */
-   if (!parse_type_qualifier(C, &param->type.qualifier))
-      RETURN0;
-
-   param_qual = *C->I++;
-   switch (param_qual) {
-   case PARAM_QUALIFIER_IN:
-      if (param->type.qualifier != SLANG_QUAL_CONST
-          && param->type.qualifier != SLANG_QUAL_NONE) {
-         slang_info_log_error(C->L, "Invalid type qualifier.");
-         RETURN0;
-      }
-      break;
-   case PARAM_QUALIFIER_OUT:
-      if (param->type.qualifier == SLANG_QUAL_NONE)
-         param->type.qualifier = SLANG_QUAL_OUT;
-      else {
-         slang_info_log_error(C->L, "Invalid type qualifier.");
-         RETURN0;
-      }
-      break;
-   case PARAM_QUALIFIER_INOUT:
-      if (param->type.qualifier == SLANG_QUAL_NONE)
-         param->type.qualifier = SLANG_QUAL_INOUT;
-      else {
-         slang_info_log_error(C->L, "Invalid type qualifier.");
-         RETURN0;
-      }
-      break;
-   default:
-      RETURN0;
-   }
-
-   /* parse precision qualifier (lowp, mediump, highp */
-   precision_qual = *C->I++;
-   /* ignored at this time */
-   (void) precision_qual;
-
-   /* parse parameter's type specifier and name */
-   if (!parse_type_specifier(C, O, &param->type.specifier))
-      RETURN0;
-   if (!parse_type_array_size(C, O, &param->type.array_len))
-      RETURN0;
-   param->a_name = parse_identifier(C);
-   if (param->a_name == SLANG_ATOM_NULL)
-      RETURN0;
-
-   /* first-class array
-    */
-   if (param->type.array_len >= 0) {
-      slang_type_specifier p;
-
-      slang_type_specifier_ctr(&p);
-      if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
-         slang_type_specifier_dtr(&p);
-         RETURN0;
-      }
-      if (!convert_to_array(C, param, &p)) {
-         slang_type_specifier_dtr(&p);
-         RETURN0;
-      }
-      slang_type_specifier_dtr(&p);
-      param->array_len = param->type.array_len;
-   }
-
-   /* if the parameter is an array, parse its size (the size must be
-    * explicitly defined
-    */
-   if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
-      slang_type_specifier p;
-
-      if (param->type.array_len >= 0) {
-         slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
-         RETURN0;
-      }
-      slang_type_specifier_ctr(&p);
-      if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
-         slang_type_specifier_dtr(&p);
-         RETURN0;
-      }
-      if (!convert_to_array(C, param, &p)) {
-         slang_type_specifier_dtr(&p);
-         RETURN0;
-      }
-      slang_type_specifier_dtr(&p);
-      if (!parse_array_len(C, O, &param->array_len))
-         RETURN0;
-   }
-
-#if 0
-   /* calculate the parameter size */
-   if (!calculate_var_size(C, O, param))
-      RETURN0;
-#endif
-   /* TODO: allocate the local address here? */
-   return 1;
-}
-
-/* function type */
-#define FUNCTION_ORDINARY 0
-#define FUNCTION_CONSTRUCTOR 1
-#define FUNCTION_OPERATOR 2
-
-/* function parameter */
-#define PARAMETER_NONE 0
-#define PARAMETER_NEXT 1
-
-/* operator type */
-#define OPERATOR_ADDASSIGN 1
-#define OPERATOR_SUBASSIGN 2
-#define OPERATOR_MULASSIGN 3
-#define OPERATOR_DIVASSIGN 4
-/*#define OPERATOR_MODASSIGN 5*/
-/*#define OPERATOR_LSHASSIGN 6*/
-/*#define OPERATOR_RSHASSIGN 7*/
-/*#define OPERATOR_ANDASSIGN 8*/
-/*#define OPERATOR_XORASSIGN 9*/
-/*#define OPERATOR_ORASSIGN 10*/
-#define OPERATOR_LOGICALXOR 11
-/*#define OPERATOR_BITOR 12*/
-/*#define OPERATOR_BITXOR 13*/
-/*#define OPERATOR_BITAND 14*/
-#define OPERATOR_LESS 15
-#define OPERATOR_GREATER 16
-#define OPERATOR_LESSEQUAL 17
-#define OPERATOR_GREATEREQUAL 18
-/*#define OPERATOR_LSHIFT 19*/
-/*#define OPERATOR_RSHIFT 20*/
-#define OPERATOR_MULTIPLY 21
-#define OPERATOR_DIVIDE 22
-/*#define OPERATOR_MODULUS 23*/
-#define OPERATOR_INCREMENT 24
-#define OPERATOR_DECREMENT 25
-#define OPERATOR_PLUS 26
-#define OPERATOR_MINUS 27
-/*#define OPERATOR_COMPLEMENT 28*/
-#define OPERATOR_NOT 29
-
-static const struct
-{
-   unsigned int o_code;
-   const char *o_name;
-} operator_names[] = {
-   {OPERATOR_INCREMENT, "++"},
-   {OPERATOR_ADDASSIGN, "+="},
-   {OPERATOR_PLUS, "+"},
-   {OPERATOR_DECREMENT, "--"},
-   {OPERATOR_SUBASSIGN, "-="},
-   {OPERATOR_MINUS, "-"},
-   {OPERATOR_NOT, "!"},
-   {OPERATOR_MULASSIGN, "*="},
-   {OPERATOR_MULTIPLY, "*"},
-   {OPERATOR_DIVASSIGN, "/="},
-   {OPERATOR_DIVIDE, "/"},
-   {OPERATOR_LESSEQUAL, "<="},
-   /*{ OPERATOR_LSHASSIGN, "<<=" }, */
-   /*{ OPERATOR_LSHIFT, "<<" }, */
-   {OPERATOR_LESS, "<"},
-   {OPERATOR_GREATEREQUAL, ">="},
-   /*{ OPERATOR_RSHASSIGN, ">>=" }, */
-   /*{ OPERATOR_RSHIFT, ">>" }, */
-   {OPERATOR_GREATER, ">"},
-   /*{ OPERATOR_MODASSIGN, "%=" }, */
-   /*{ OPERATOR_MODULUS, "%" }, */
-   /*{ OPERATOR_ANDASSIGN, "&=" }, */
-   /*{ OPERATOR_BITAND, "&" }, */
-   /*{ OPERATOR_ORASSIGN, "|=" }, */
-   /*{ OPERATOR_BITOR, "|" }, */
-   /*{ OPERATOR_COMPLEMENT, "~" }, */
-   /*{ OPERATOR_XORASSIGN, "^=" }, */
-   {OPERATOR_LOGICALXOR, "^^"},
-   /*{ OPERATOR_BITXOR, "^" } */
-};
-
-static slang_atom
-parse_operator_name(slang_parse_ctx * C)
-{
-   unsigned int i;
-
-   for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
-      if (operator_names[i].o_code == (unsigned int) (*C->I)) {
-         slang_atom atom =
-            slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
-         if (atom == SLANG_ATOM_NULL) {
-            slang_info_log_memory(C->L);
-            RETURN0;
-         }
-         C->I++;
-         return atom;
-      }
-   }
-   RETURN0;
-}
-
-
-static int
-parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
-                         slang_function * func)
-{
-   GLuint functype;
-   /* parse function type and name */
-   if (!parse_fully_specified_type(C, O, &func->header.type))
-      RETURN0;
-
-   functype = *C->I++;
-   switch (functype) {
-   case FUNCTION_ORDINARY:
-      func->kind = SLANG_FUNC_ORDINARY;
-      func->header.a_name = parse_identifier(C);
-      if (func->header.a_name == SLANG_ATOM_NULL)
-         RETURN0;
-      break;
-   case FUNCTION_CONSTRUCTOR:
-      func->kind = SLANG_FUNC_CONSTRUCTOR;
-      if (func->header.type.specifier.type == SLANG_SPEC_STRUCT)
-         RETURN0;
-      func->header.a_name =
-         slang_atom_pool_atom(C->atoms,
-                              slang_type_specifier_type_to_string
-                              (func->header.type.specifier.type));
-      if (func->header.a_name == SLANG_ATOM_NULL) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      break;
-   case FUNCTION_OPERATOR:
-      func->kind = SLANG_FUNC_OPERATOR;
-      func->header.a_name = parse_operator_name(C);
-      if (func->header.a_name == SLANG_ATOM_NULL)
-         RETURN0;
-      break;
-   default:
-      RETURN0;
-   }
-
-   if (!legal_identifier(func->header.a_name)) {
-      slang_info_log_error(C->L, "illegal function name '%s'",
-                           (char *) func->header.a_name);
-      RETURN0;
-   }
-
-   /* parse function parameters */
-   while (*C->I++ == PARAMETER_NEXT) {
-      slang_variable *p = slang_variable_scope_grow(func->parameters);
-      if (!p) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      if (!parse_parameter_declaration(C, O, p))
-         RETURN0;
-   }
-
-   /* if the function returns a value, append a hidden __retVal 'out'
-    * parameter that corresponds to the return value.
-    */
-   if (_slang_function_has_return_value(func)) {
-      slang_variable *p = slang_variable_scope_grow(func->parameters);
-      slang_atom a_retVal = slang_atom_pool_atom(C->atoms, "__retVal");
-      assert(a_retVal);
-      p->a_name = a_retVal;
-      p->type = func->header.type;
-      p->type.qualifier = SLANG_QUAL_OUT;
-   }
-
-   /* function formal parameters and local variables share the same
-    * scope, so save the information about param count in a seperate
-    * place also link the scope to the global variable scope so when a
-    * given identifier is not found here, the search process continues
-    * in the global space
-    */
-   func->param_count = func->parameters->num_variables;
-   func->parameters->outer_scope = O->vars;
-
-   return 1;
-}
-
-static int
-parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
-                          slang_function * func)
-{
-   slang_output_ctx o = *O;
-
-   if (!parse_function_prototype(C, O, func))
-      RETURN0;
-
-   /* create function's body operation */
-   func->body = (slang_operation *) _slang_alloc(sizeof(slang_operation));
-   if (func->body == NULL) {
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-   if (!slang_operation_construct(func->body)) {
-      _slang_free(func->body);
-      func->body = NULL;
-      slang_info_log_memory(C->L);
-      RETURN0;
-   }
-
-   /* to parse the body the parse context is modified in order to
-    * capture parsed variables into function's local variable scope
-    */
-   C->global_scope = GL_FALSE;
-   o.vars = func->parameters;
-   if (!parse_statement(C, &o, func->body))
-      RETURN0;
-
-   C->global_scope = GL_TRUE;
-   return 1;
-}
-
-static GLboolean
-initialize_global(slang_assemble_ctx * A, slang_variable * var)
-{
-   slang_operation op_id, op_assign;
-   GLboolean result;
-
-   /* construct the left side of assignment */
-   if (!slang_operation_construct(&op_id))
-      return GL_FALSE;
-   op_id.type = SLANG_OPER_IDENTIFIER;
-   op_id.a_id = var->a_name;
-
-   /* put the variable into operation's scope */
-   op_id.locals->variables =
-      (slang_variable **) _slang_alloc(sizeof(slang_variable *));
-   if (op_id.locals->variables == NULL) {
-      slang_operation_destruct(&op_id);
-      return GL_FALSE;
-   }
-   op_id.locals->num_variables = 1;
-   op_id.locals->variables[0] = var;
-
-   /* construct the assignment expression */
-   if (!slang_operation_construct(&op_assign)) {
-      op_id.locals->num_variables = 0;
-      slang_operation_destruct(&op_id);
-      return GL_FALSE;
-   }
-   op_assign.type = SLANG_OPER_ASSIGN;
-   op_assign.children =
-      (slang_operation *) _slang_alloc(2 * sizeof(slang_operation));
-   if (op_assign.children == NULL) {
-      slang_operation_destruct(&op_assign);
-      op_id.locals->num_variables = 0;
-      slang_operation_destruct(&op_id);
-      return GL_FALSE;
-   }
-   op_assign.num_children = 2;
-   op_assign.children[0] = op_id;
-   op_assign.children[1] = *var->initializer;
-
-   result = 1;
-
-   /* carefully destroy the operations */
-   op_assign.num_children = 0;
-   _slang_free(op_assign.children);
-   op_assign.children = NULL;
-   slang_operation_destruct(&op_assign);
-   op_id.locals->num_variables = 0;
-   slang_operation_destruct(&op_id);
-
-   if (!result)
-      return GL_FALSE;
-
-   return GL_TRUE;
-}
-
-/* init declarator list */
-#define DECLARATOR_NONE 0
-#define DECLARATOR_NEXT 1
-
-/* variable declaration */
-#define VARIABLE_NONE 0
-#define VARIABLE_IDENTIFIER 1
-#define VARIABLE_INITIALIZER 2
-#define VARIABLE_ARRAY_EXPLICIT 3
-#define VARIABLE_ARRAY_UNKNOWN 4
-
-
-/**
- * Check if it's OK to re-declare a variable with the given new type.
- * This happens when applying layout qualifiers to gl_FragCoord or
- * (re)setting an array size.
- * If redeclaration is OK, return a pointer to the incoming variable
- * updated with new type info.  Else return NULL;
- */
-static slang_variable *
-redeclare_variable(slang_variable *var, 
-                   const slang_fully_specified_type *type)
-{
-   if (slang_fully_specified_types_compatible(&var->type, type)) {
-      /* replace orig var layout with new layout */
-      var->type.layout = type->layout;
-
-      /* XXX there may be other type updates in the future here */
-
-      return var;
-   }
-   else
-      return NULL;
-}
-
-
-/**
- * Parse the initializer for a variable declaration.
- */
-static int
-parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
-                      const slang_fully_specified_type * type)
-{
-   GET_CURRENT_CONTEXT(ctx); /* a hack */
-   slang_variable *var = NULL, *prevDecl;
-   slang_atom a_name;
-
-   /* empty init declatator (without name, e.g. "float ;") */
-   if (*C->I++ == VARIABLE_NONE)
-      return 1;
-
-   a_name = parse_identifier(C);
-
-   /* check if name is already in this scope */
-   prevDecl = _slang_variable_locate(O->vars, a_name, C->global_scope);
-   if (prevDecl) {
-      /* A var with this name has already been declared.
-       * Check if redeclaring the var with a different type/layout is legal.
-       */
-      if (C->global_scope) {
-         var = redeclare_variable(prevDecl, type);
-      }
-      if (!var) {
-         slang_info_log_error(C->L,
-                   "declaration of '%s' conflicts with previous declaration",
-                   (char *) a_name);
-         RETURN0;
-      }
-   }
-
-   if (!var) {
-      /* make room for a new variable and initialize it */
-      var = slang_variable_scope_grow(O->vars);
-      if (!var) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-
-      /* copy the declarator type qualifier/etc info, parse the identifier */
-      var->type.qualifier = type->qualifier;
-      var->type.centroid = type->centroid;
-      var->type.precision = type->precision;
-      var->type.specifier = type->specifier;/*new*/
-      var->type.variant = type->variant;
-      var->type.layout = type->layout;
-      var->type.array_len = type->array_len;
-      var->a_name = a_name;
-      if (var->a_name == SLANG_ATOM_NULL)
-         RETURN0;
-   }
-
-   switch (*C->I++) {
-   case VARIABLE_NONE:
-      /* simple variable declarator - just copy the specifier */
-      if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
-         RETURN0;
-      break;
-   case VARIABLE_INITIALIZER:
-      /* initialized variable - copy the specifier and parse the expression */
-      if (0 && type->array_len >= 0) {
-         /* The type was something like "float[4]" */
-         convert_to_array(C, var, &type->specifier);
-         var->array_len = type->array_len;
-      }
-      else {
-         if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
-            RETURN0;
-      }
-      var->initializer =
-         (slang_operation *) _slang_alloc(sizeof(slang_operation));
-      if (var->initializer == NULL) {
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      if (!slang_operation_construct(var->initializer)) {
-         _slang_free(var->initializer);
-         var->initializer = NULL;
-         slang_info_log_memory(C->L);
-         RETURN0;
-      }
-      if (!parse_expression(C, O, var->initializer))
-         RETURN0;
-      break;
-   case VARIABLE_ARRAY_UNKNOWN:
-      /* unsized array - mark it as array and copy the specifier to
-       * the array element
-       */
-      if (type->array_len >= 0) {
-         slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
-         RETURN0;
-      }
-      if (!convert_to_array(C, var, &type->specifier))
-         return GL_FALSE;
-      break;
-   case VARIABLE_ARRAY_EXPLICIT:
-      if (type->array_len >= 0) {
-         /* the user is trying to do something like: float[2] x[3]; */
-         slang_info_log_error(C->L, "multi-dimensional arrays not allowed");
-         RETURN0;
-      }
-      if (!convert_to_array(C, var, &type->specifier))
-         return GL_FALSE;
-      if (!parse_array_len(C, O, &var->array_len))
-         return GL_FALSE;
-      break;
-   default:
-      RETURN0;
-   }
-
-   /* allocate global address space for a variable with a known size */
-   if (C->global_scope
-       && !(var->type.specifier.type == SLANG_SPEC_ARRAY
-            && var->array_len == 0)) {
-      if (!calculate_var_size(C, O, var))
-         return GL_FALSE;
-   }
-
-   /* emit code for global var decl */
-   if (C->global_scope) {
-      slang_assemble_ctx A;
-      memset(&A, 0, sizeof(slang_assemble_ctx));
-      A.allow_uniform_initializers = C->version > 110;
-      A.atoms = C->atoms;
-      A.space.funcs = O->funs;
-      A.space.structs = O->structs;
-      A.space.vars = O->vars;
-      A.program = O->program;
-      A.pragmas = O->pragmas;
-      A.vartable = O->vartable;
-      A.log = C->L;
-      A.curFuncEndLabel = NULL;
-      A.EmitContReturn = ctx->Shader.EmitContReturn;
-      if (!_slang_codegen_global_variable(&A, var, C->type))
-         RETURN0;
-   }
-
-   /* initialize global variable */
-   if (C->global_scope) {
-      if (var->initializer != NULL) {
-         slang_assemble_ctx A;
-         memset(&A, 0, sizeof(slang_assemble_ctx));
-         A.allow_uniform_initializers = C->version > 110;
-         A.atoms = C->atoms;
-         A.space.funcs = O->funs;
-         A.space.structs = O->structs;
-         A.space.vars = O->vars;
-         if (!initialize_global(&A, var))
-            RETURN0;
-      }
-   }
-
-   if (var->type.qualifier == SLANG_QUAL_FIXEDINPUT &&
-       var->a_name == slang_atom_pool_atom(C->atoms, "gl_FragCoord")) {
-      /* set the program's PixelCenterInteger, OriginUpperLeft fields */
-      struct gl_fragment_program *fragProg =
-         (struct gl_fragment_program *) O->program;
-
-      if (var->type.layout & SLANG_LAYOUT_UPPER_LEFT_BIT) {
-         fragProg->OriginUpperLeft = GL_TRUE;
-      }
-      if (var->type.layout & SLANG_LAYOUT_PIXEL_CENTER_INTEGER_BIT) {
-         fragProg->PixelCenterInteger = GL_TRUE;
-      }
-   }
-
-   return 1;
-}
-
-/**
- * Parse a list of variable declarations.  Each variable may have an
- * initializer.
- */
-static int
-parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
-{
-   slang_fully_specified_type type;
-
-   /* parse the fully specified type, common to all declarators */
-   if (!slang_fully_specified_type_construct(&type))
-      RETURN0;
-   if (!parse_fully_specified_type(C, O, &type)) {
-      slang_fully_specified_type_destruct(&type);
-      RETURN0;
-   }
-
-   /* parse declarators, pass-in the parsed type */
-   do {
-      if (!parse_init_declarator(C, O, &type)) {
-         slang_fully_specified_type_destruct(&type);
-         RETURN0;
-      }
-   }
-   while (*C->I++ == DECLARATOR_NEXT);
-
-   slang_fully_specified_type_destruct(&type);
-   return 1;
-}
-
-
-/**
- * Parse a function definition or declaration.
- * \param C  parsing context
- * \param O  output context
- * \param definition if non-zero expect a definition, else a declaration
- * \param parsed_func_ret  returns the parsed function
- * \return GL_TRUE if success, GL_FALSE if failure
- */
-static GLboolean
-parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
-               slang_function ** parsed_func_ret)
-{
-   slang_function parsed_func, *found_func;
-
-   /* parse function definition/declaration */
-   if (!slang_function_construct(&parsed_func))
-      return GL_FALSE;
-   if (definition) {
-      if (!parse_function_definition(C, O, &parsed_func)) {
-         slang_function_destruct(&parsed_func);
-         return GL_FALSE;
-      }
-   }
-   else {
-      if (!parse_function_prototype(C, O, &parsed_func)) {
-         slang_function_destruct(&parsed_func);
-         return GL_FALSE;
-      }
-   }
-
-   /* find a function with a prototype matching the parsed one - only
-    * the current scope is being searched to allow built-in function
-    * overriding
-    */
-   found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
-   if (found_func == NULL) {
-      /* New function, add it to the function list */
-      O->funs->functions =
-         (slang_function *) _slang_realloc(O->funs->functions,
-                                           O->funs->num_functions
-                                           * sizeof(slang_function),
-                                           (O->funs->num_functions + 1)
-                                           * sizeof(slang_function));
-      if (O->funs->functions == NULL) {
-         /* Make sure that there are no functions marked, as the
-          * allocation is currently NULL, in order to avoid
-          * a potental segfault as we clean up later.
-          */
-         O->funs->num_functions = 0;
-
-         slang_info_log_memory(C->L);
-         slang_function_destruct(&parsed_func);
-         return GL_FALSE;
-      }
-      O->funs->functions[O->funs->num_functions] = parsed_func;
-      O->funs->num_functions++;
-
-      /* return the newly parsed function */
-      *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
-   }
-   else {
-      /* previously defined or declared */
-      /* TODO: check function return type qualifiers and specifiers */
-      if (definition) {
-         if (found_func->body != NULL) {
-            slang_info_log_error(C->L, "%s: function already has a body.",
-                                 slang_atom_pool_id(C->atoms,
-                                                    parsed_func.header.
-                                                    a_name));
-            slang_function_destruct(&parsed_func);
-            return GL_FALSE;
-         }
-
-         /* destroy the existing function declaration and replace it
-          * with the new one
-          */
-         slang_function_destruct(found_func);
-         *found_func = parsed_func;
-      }
-      else {
-         /* another declaration of the same function prototype - ignore it */
-         slang_function_destruct(&parsed_func);
-      }
-
-      /* return the found function */
-      *parsed_func_ret = found_func;
-   }
-
-   return GL_TRUE;
-}
-
-/* declaration */
-#define DECLARATION_FUNCTION_PROTOTYPE 1
-#define DECLARATION_INIT_DECLARATOR_LIST 2
-
-static int
-parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
-{
-   switch (*C->I++) {
-   case DECLARATION_INIT_DECLARATOR_LIST:
-      if (!parse_init_declarator_list(C, O))
-         RETURN0;
-      break;
-   case DECLARATION_FUNCTION_PROTOTYPE:
-      {
-         slang_function *dummy_func;
-
-         if (!parse_function(C, O, 0, &dummy_func))
-            RETURN0;
-      }
-      break;
-   default:
-      RETURN0;
-   }
-   return 1;
-}
-
-static int
-parse_default_precision(slang_parse_ctx * C, slang_output_ctx * O)
-{
-   int precision, type;
-
-   if (!O->allow_precision) {
-      slang_info_log_error(C->L, "syntax error at \"precision\"");
-      RETURN0;
-   }
-
-   precision = *C->I++;
-   switch (precision) {
-   case PRECISION_LOW:
-   case PRECISION_MEDIUM:
-   case PRECISION_HIGH:
-      /* OK */
-      break;
-   default:
-      _mesa_problem(NULL, "unexpected precision %d at %s:%d\n",
-                    precision, __FILE__, __LINE__);
-      RETURN0;
-   }
-
-   type = *C->I++;
-   switch (type) {
-   case TYPE_SPECIFIER_FLOAT:
-   case TYPE_SPECIFIER_INT:
-   case TYPE_SPECIFIER_SAMPLER1D:
-   case TYPE_SPECIFIER_SAMPLER2D:
-   case TYPE_SPECIFIER_SAMPLER3D:
-   case TYPE_SPECIFIER_SAMPLERCUBE:
-   case TYPE_SPECIFIER_SAMPLER1DSHADOW:
-   case TYPE_SPECIFIER_SAMPLER2DSHADOW:
-   case TYPE_SPECIFIER_SAMPLER2DRECT:
-   case TYPE_SPECIFIER_SAMPLER2DRECTSHADOW:
-   case TYPE_SPECIFIER_SAMPLER_1D_ARRAY:
-   case TYPE_SPECIFIER_SAMPLER_2D_ARRAY:
-   case TYPE_SPECIFIER_SAMPLER_1D_ARRAY_SHADOW:
-   case TYPE_SPECIFIER_SAMPLER_2D_ARRAY_SHADOW:
-      /* OK */
-      break;
-   default:
-      _mesa_problem(NULL, "unexpected type %d at %s:%d\n",
-                    type, __FILE__, __LINE__);
-      RETURN0;
-   }
-
-   assert(type < TYPE_SPECIFIER_COUNT);
-   O->default_precision[type] = precision;
-
-   return 1;
-}
-
-
-/**
- * Initialize the default precision for all types.
- * XXX this info isn't used yet.
- */
-static void
-init_default_precision(slang_output_ctx *O, slang_unit_type type)
-{
-   GLuint i;
-   for (i = 0; i < TYPE_SPECIFIER_COUNT; i++) {
-#if FEATURE_es2_glsl
-      O->default_precision[i] = PRECISION_LOW;
-#else
-      O->default_precision[i] = PRECISION_HIGH;
-#endif
-   }
-
-   if (type == SLANG_UNIT_VERTEX_SHADER) {
-      O->default_precision[TYPE_SPECIFIER_FLOAT] = PRECISION_HIGH;
-      O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_HIGH;
-   }
-   else {
-      O->default_precision[TYPE_SPECIFIER_INT] = PRECISION_MEDIUM;
-   }
-}
-
-
-static int
-parse_invariant(slang_parse_ctx * C, slang_output_ctx * O)
-{
-   if (O->allow_invariant) {
-      slang_atom *a = parse_identifier(C);
-      /* XXX not doing anything with this var yet */
-      /*printf("ID: %s\n", (char*) a);*/
-      return a ? 1 : 0;
-   }
-   else {
-      slang_info_log_error(C->L, "syntax error at \"invariant\"");
-      RETURN0;
-   }
-}
-      
-
-/* external declaration or default precision specifier */
-#define EXTERNAL_NULL 0
-#define EXTERNAL_FUNCTION_DEFINITION 1
-#define EXTERNAL_DECLARATION 2
-#define DEFAULT_PRECISION 3
-#define INVARIANT_STMT 4
-
-
-static GLboolean
-parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit,
-                struct gl_shader *shader)
-{
-   GET_CURRENT_CONTEXT(ctx);
-   slang_output_ctx o;
-   GLboolean success;
-   GLuint maxRegs;
-   slang_function *mainFunc = NULL;
-
-   if (unit->type == SLANG_UNIT_FRAGMENT_BUILTIN ||
-       unit->type == SLANG_UNIT_FRAGMENT_SHADER) {
-      maxRegs = ctx->Const.FragmentProgram.MaxTemps;
-   }
-   else {
-      assert(unit->type == SLANG_UNIT_VERTEX_BUILTIN ||
-             unit->type == SLANG_UNIT_VERTEX_SHADER);
-      maxRegs = ctx->Const.VertexProgram.MaxTemps;
-   }
-
-   /* setup output context */
-   o.funs = &unit->funs;
-   o.structs = &unit->structs;
-   o.vars = &unit->vars;
-   o.program = shader ? shader->Program : NULL;
-   o.pragmas = shader ? &shader->Pragmas : NULL;
-   o.vartable = _slang_new_var_table(maxRegs);
-   _slang_push_var_table(o.vartable);
-
-   /* allow 'invariant' keyword? */
-#if FEATURE_es2_glsl
-   o.allow_invariant = GL_TRUE;
-#else
-   o.allow_invariant = (C->version >= 120) ? GL_TRUE : GL_FALSE;
-#endif
-
-   /* allow 'centroid' keyword? */
-   o.allow_centroid = (C->version >= 120) ? GL_TRUE : GL_FALSE;
-
-   /* allow 'lowp/mediump/highp' keywords? */
-#if FEATURE_es2_glsl
-   o.allow_precision = GL_TRUE;
-#else
-   o.allow_precision = (C->version >= 120) ? GL_TRUE : GL_FALSE;
-#endif
-   init_default_precision(&o, unit->type);
-
-   /* allow 'float[]' keyword? */
-   o.allow_array_types = (C->version >= 120) ? GL_TRUE : GL_FALSE;
-
-   /* parse individual functions and declarations */
-   while (*C->I != EXTERNAL_NULL) {
-      switch (*C->I++) {
-      case EXTERNAL_FUNCTION_DEFINITION:
-         {
-            slang_function *func;
-            success = parse_function(C, &o, 1, &func);
-            if (success && strcmp((char *) func->header.a_name, "main") == 0) {
-               /* found main() */
-               mainFunc = func;
-            }
-         }
-         break;
-      case EXTERNAL_DECLARATION:
-         success = parse_declaration(C, &o);
-         break;
-      case DEFAULT_PRECISION:
-         success = parse_default_precision(C, &o);
-         break;
-      case INVARIANT_STMT:
-         success = parse_invariant(C, &o);
-         break;
-      default:
-         success = GL_FALSE;
-      }
-
-      if (!success) {
-         /* xxx free codegen */
-         _slang_pop_var_table(o.vartable);
-         return GL_FALSE;
-      }
-   }
-   C->I++;
-
-   if (mainFunc) {
-      /* assemble (generate code) for main() */
-      slang_assemble_ctx A;
-      memset(&A, 0, sizeof(slang_assemble_ctx));
-      A.atoms = C->atoms;
-      A.space.funcs = o.funs;
-      A.space.structs = o.structs;
-      A.space.vars = o.vars;
-      A.program = o.program;
-      A.pragmas = &shader->Pragmas;
-      A.vartable = o.vartable;
-      A.EmitContReturn = ctx->Shader.EmitContReturn;
-      A.log = C->L;
-      A.allow_uniform_initializers = C->version > 110;
-
-      /* main() takes no parameters */
-      if (mainFunc->param_count > 0) {
-         slang_info_log_error(A.log, "main() takes no arguments");
-         return GL_FALSE;
-      }
-
-      _slang_codegen_function(&A, mainFunc);
-
-      shader->Main = GL_TRUE; /* this shader defines main() */
-
-      shader->UnresolvedRefs = A.UnresolvedRefs;
-   }
-
-   _slang_pop_var_table(o.vartable);
-   _slang_delete_var_table(o.vartable);
-
-   return GL_TRUE;
-}
-
-static GLboolean
-compile_binary(const unsigned char * prod, slang_code_unit * unit,
-               GLuint version,
-               slang_unit_type type, slang_info_log * infolog,
-               slang_code_unit * builtin, slang_code_unit * downlink,
-               struct gl_shader *shader)
-{
-   slang_parse_ctx C;
-
-   unit->type = type;
-
-   /* setup parse context */
-   C.I = prod;
-   C.L = infolog;
-   C.parsing_builtin = (builtin == NULL);
-   C.global_scope = GL_TRUE;
-   C.atoms = &unit->object->atompool;
-   C.type = type;
-   C.version = version;
-
-   if (!check_revision(&C))
-      return GL_FALSE;
-
-   if (downlink != NULL) {
-      unit->vars.outer_scope = &downlink->vars;
-      unit->funs.outer_scope = &downlink->funs;
-      unit->structs.outer_scope = &downlink->structs;
-   }
-
-   /* parse translation unit */
-   return parse_code_unit(&C, unit, shader);
-}
-
-static GLboolean
-compile_with_grammar(const char *source,
-                     slang_code_unit *unit,
-                     slang_unit_type type,
-                     slang_info_log *infolog,
-                     slang_code_unit *builtin,
-                     struct gl_shader *shader,
-                     struct gl_sl_pragmas *pragmas,
-                     unsigned int shader_type,
-                     unsigned int parsing_builtin)
-{
-   struct sl_pp_purify_options options;
-   struct sl_pp_context *context;
-   unsigned char *prod;
-   GLuint size;
-   unsigned int version;
-   unsigned int maxVersion;
-   int result;
-   char errmsg[200] = "";
-
-   assert(shader_type == 1 || shader_type == 2);
-
-   memset(&options, 0, sizeof(options));
-
-   context = sl_pp_context_create(source, &options);
-   if (!context) {
-      slang_info_log_error(infolog, "out of memory");
-      return GL_FALSE;
-   }
-
-   if (sl_pp_version(context, &version)) {
-      slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
-      sl_pp_context_destroy(context);
-      return GL_FALSE;
-   }
-
-   if (sl_pp_context_add_extension(context, "GL_ARB_draw_buffers") ||
-       sl_pp_context_add_extension(context, "GL_ARB_texture_rectangle")) {
-      slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
-      sl_pp_context_destroy(context);
-      return GL_FALSE;
-   }
-
-   if (type == SLANG_UNIT_FRAGMENT_SHADER) {
-      sl_pp_context_add_extension(context, "GL_ARB_fragment_coord_conventions");
-   }
-
-
-#if FEATURE_es2_glsl
-   if (sl_pp_context_add_predefined(context, "GL_ES", "1") ||
-       sl_pp_context_add_predefined(context, "GL_FRAGMENT_PRECISION_HIGH", "1")) {
-      slang_info_log_error(infolog, "%s", sl_pp_context_error_message(context));
-      sl_pp_context_destroy(context);
-      return GL_FALSE;
-   }
-#endif
-
-#if FEATURE_ARB_shading_language_120
-   maxVersion = 120;
-#elif FEATURE_es2_glsl
-   maxVersion = 100;
-#else
-   maxVersion = 110;
-#endif
-
-   if (version > maxVersion ||
-       (version != 100 && version != 110 && version != 120)) {
-      slang_info_log_error(infolog,
-                           "language version %.2f is not supported.",
-                           version * 0.01);
-      sl_pp_context_destroy(context);
-      return GL_FALSE;
-   }
-
-   /* Finally check the syntax and generate its binary representation. */
-   result = sl_cl_compile(context,
-                          shader_type,
-                          parsing_builtin,
-                          &prod,
-                          &size,
-                          errmsg,
-                          sizeof(errmsg));
-
-   sl_pp_context_destroy(context);
-
-   if (result) {
-      /*GLint pos;*/
-
-      slang_info_log_error(infolog, errmsg);
-      /* syntax error (possibly in library code) */
-#if 0
-      {
-         int line, col;
-         char *s;
-         s = (char *) _mesa_find_line_column((const GLubyte *) source,
-                                             (const GLubyte *) source + pos,
-                                             &line, &col);
-         printf("Error on line %d, col %d: %s\n", line, col, s);
-      }
-#endif
-      return GL_FALSE;
-   }
-
-   /* Syntax is okay - translate it to internal representation. */
-   if (!compile_binary(prod, unit, version, type, infolog, builtin,
-                       &builtin[SLANG_BUILTIN_TOTAL - 1],
-                       shader)) {
-      free(prod);
-      return GL_FALSE;
-   }
-   free(prod);
-   return GL_TRUE;
-}
-
-static const unsigned char slang_core_gc[] = {
-#include "library/slang_core_gc.h"
-};
-
-static const unsigned char slang_120_core_gc[] = {
-#include "library/slang_120_core_gc.h"
-};
-
-static const unsigned char slang_120_fragment_gc[] = {
-#include "library/slang_builtin_120_fragment_gc.h"
-};
-
-static const unsigned char slang_common_builtin_gc[] = {
-#include "library/slang_common_builtin_gc.h"
-};
-
-static const unsigned char slang_fragment_builtin_gc[] = {
-#include "library/slang_fragment_builtin_gc.h"
-};
-
-static const unsigned char slang_vertex_builtin_gc[] = {
-#include "library/slang_vertex_builtin_gc.h"
-};
-
-static GLboolean
-compile_object(const char *source,
-               slang_code_object *object,
-               slang_unit_type type,
-               slang_info_log *infolog,
-               struct gl_shader *shader,
-               struct gl_sl_pragmas *pragmas)
-{
-   slang_code_unit *builtins = NULL;
-   GLuint base_version = 110;
-   unsigned int shader_type;
-   unsigned int parsing_builtin;
-
-   /* set shader type - the syntax is slightly different for different shaders */
-   if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_FRAGMENT_BUILTIN) {
-      shader_type = 1;
-   } else {
-      shader_type = 2;
-   }
-
-   /* enable language extensions */
-   parsing_builtin = 1;
-
-   /* if parsing user-specified shader, load built-in library */
-   if (type == SLANG_UNIT_FRAGMENT_SHADER || type == SLANG_UNIT_VERTEX_SHADER) {
-      /* compile core functionality first */
-      if (!compile_binary(slang_core_gc,
-                          &object->builtin[SLANG_BUILTIN_CORE],
-                          base_version,
-                          SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
-                          NULL, NULL, NULL))
-         return GL_FALSE;
-
-#if FEATURE_ARB_shading_language_120
-      if (!compile_binary(slang_120_core_gc,
-                          &object->builtin[SLANG_BUILTIN_120_CORE],
-                          120,
-                          SLANG_UNIT_FRAGMENT_BUILTIN, infolog,
-                          NULL, &object->builtin[SLANG_BUILTIN_CORE], NULL))
-         return GL_FALSE;
-#endif
-
-      /* compile common functions and variables, link to core */
-      if (!compile_binary(slang_common_builtin_gc,
-                          &object->builtin[SLANG_BUILTIN_COMMON],
-#if FEATURE_ARB_shading_language_120
-                          120,
-#else
-                          base_version,
-#endif
-                          SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
-#if FEATURE_ARB_shading_language_120
-                          &object->builtin[SLANG_BUILTIN_120_CORE],
-#else
-                          &object->builtin[SLANG_BUILTIN_CORE],
-#endif
-                          NULL))
-         return GL_FALSE;
-
-      /* compile target-specific functions and variables, link to common */
-      if (type == SLANG_UNIT_FRAGMENT_SHADER) {
-         if (!compile_binary(slang_fragment_builtin_gc,
-                             &object->builtin[SLANG_BUILTIN_TARGET],
-                             base_version,
-                             SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
-                             &object->builtin[SLANG_BUILTIN_COMMON], NULL))
-            return GL_FALSE;
-#if FEATURE_ARB_shading_language_120
-         if (!compile_binary(slang_120_fragment_gc,
-                             &object->builtin[SLANG_BUILTIN_TARGET],
-                             120,
-                             SLANG_UNIT_FRAGMENT_BUILTIN, infolog, NULL,
-                             &object->builtin[SLANG_BUILTIN_COMMON], NULL))
-            return GL_FALSE;
-#endif
-      }
-      else if (type == SLANG_UNIT_VERTEX_SHADER) {
-         if (!compile_binary(slang_vertex_builtin_gc,
-                             &object->builtin[SLANG_BUILTIN_TARGET],
-                             base_version,
-                             SLANG_UNIT_VERTEX_BUILTIN, infolog, NULL,
-                             &object->builtin[SLANG_BUILTIN_COMMON], NULL))
-            return GL_FALSE;
-      }
-
-      /* disable language extensions */
-      parsing_builtin = 0;
-
-      builtins = object->builtin;
-   }
-
-   /* compile the actual shader - pass-in built-in library for external shader */
-   return compile_with_grammar(source,
-                               &object->unit,
-                               type,
-                               infolog,
-                               builtins,
-                               shader,
-                               pragmas,
-                               shader_type,
-                               parsing_builtin);
-}
-
-
-GLboolean
-_slang_compile(GLcontext *ctx, struct gl_shader *shader)
-{
-   GLboolean success;
-   slang_info_log info_log;
-   slang_code_object obj;
-   slang_unit_type type;
-   GLenum progTarget;
-
-   if (shader->Type == GL_VERTEX_SHADER) {
-      type = SLANG_UNIT_VERTEX_SHADER;
-   }
-   else {
-      assert(shader->Type == GL_FRAGMENT_SHADER);
-      type = SLANG_UNIT_FRAGMENT_SHADER;
-   }
-
-   if (!shader->Source)
-      return GL_FALSE;
-
-   ctx->Shader.MemPool = _slang_new_mempool(1024*1024);
-
-   shader->Main = GL_FALSE;
-
-   /* free the shader's old instructions, etc */
-   _mesa_reference_program(ctx, &shader->Program, NULL);
-
-   /* allocate new GPU program, parameter lists, etc. */
-   if (shader->Type == GL_VERTEX_SHADER)
-      progTarget = GL_VERTEX_PROGRAM_ARB;
-   else
-      progTarget = GL_FRAGMENT_PROGRAM_ARB;
-   shader->Program = ctx->Driver.NewProgram(ctx, progTarget, 1);
-   shader->Program->Parameters = _mesa_new_parameter_list();
-   shader->Program->Varying = _mesa_new_parameter_list();
-   shader->Program->Attributes = _mesa_new_parameter_list();
-
-   slang_info_log_construct(&info_log);
-   _slang_code_object_ctr(&obj);
-
-   success = compile_object(shader->Source,
-                            &obj,
-                            type,
-                            &info_log,
-                            shader,
-                            &shader->Pragmas);
-
-   /* free shader's prev info log */
-   if (shader->InfoLog) {
-      free(shader->InfoLog);
-      shader->InfoLog = NULL;
-   }
-
-   if (info_log.text) {
-      /* copy info-log string to shader object */
-      shader->InfoLog = _mesa_strdup(info_log.text);
-   }
-
-   if (info_log.error_flag) {
-      success = GL_FALSE;
-   }
-
-   slang_info_log_destruct(&info_log);
-   _slang_code_object_dtr(&obj);
-
-   _slang_delete_mempool((slang_mempool *) ctx->Shader.MemPool);
-   ctx->Shader.MemPool = NULL;
-
-   /* remove any reads of output registers */
-#if 0
-   printf("Pre-remove output reads:\n");
-   _mesa_print_program(shader->Program);
-#endif
-   _mesa_remove_output_reads(shader->Program, PROGRAM_OUTPUT);
-   if (shader->Type == GL_VERTEX_SHADER) {
-      /* and remove writes to varying vars in vertex programs */
-      _mesa_remove_output_reads(shader->Program, PROGRAM_VARYING);
-   }
-#if 0
-   printf("Post-remove output reads:\n");
-   _mesa_print_program(shader->Program);
-#endif
-
-   shader->CompileStatus = success;
-
-   if (success) {
-      if (shader->Pragmas.Optimize &&
-          (ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
-         _mesa_optimize_program(ctx, shader->Program);
-      }
-      if ((ctx->Shader.Flags & GLSL_NOP_VERT) &&
-          shader->Program->Target == GL_VERTEX_PROGRAM_ARB) {
-         _mesa_nop_vertex_program(ctx,
-                                  (struct gl_vertex_program *) shader->Program);
-      }
-      if ((ctx->Shader.Flags & GLSL_NOP_FRAG) &&
-          shader->Program->Target == GL_FRAGMENT_PROGRAM_ARB) {
-         _mesa_nop_fragment_program(ctx,
-                                (struct gl_fragment_program *) shader->Program);
-      }
-   }
-
-   if (ctx->Shader.Flags & GLSL_LOG) {
-      _mesa_write_shader_to_file(shader);
-   }
-
-   return success;
-}
-