src/mesa/shader/slang/slang_compile_struct.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2005-2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file slang_compile_struct.c
  27  * slang front-end compiler
  28  * \author Michal Krol
  29  */
  30
  31 #include "imports.h"
  32 #include "slang_compile.h"
  33
  34 /*
  35  * slang_struct_scope
  36  */
  37
  38 GLvoid
  39 _slang_struct_scope_ctr (slang_struct_scope *self)
  40 {
  41    self->structs = NULL;
  42    self->num_structs = 0;
  43    self->outer_scope = NULL;
  44 }
  45
  46 void slang_struct_scope_destruct (slang_struct_scope *scope)
  47 {
  48         unsigned int i;
  49
  50         for (i = 0; i < scope->num_structs; i++)
  51                 slang_struct_destruct (scope->structs + i);
  52         slang_alloc_free (scope->structs);
  53         /* do not free scope->outer_scope */
  54 }
  55
  56 int slang_struct_scope_copy (slang_struct_scope *x, const slang_struct_scope *y)
  57 {
  58         slang_struct_scope z;
  59         unsigned int i;
  60
  61    _slang_struct_scope_ctr (&z);
  62         z.structs = (slang_struct *) slang_alloc_malloc (y->num_structs * sizeof (slang_struct));
  63         if (z.structs == NULL)
  64         {
  65                 slang_struct_scope_destruct (&z);
  66                 return 0;
  67         }
  68         for (z.num_structs = 0; z.num_structs < y->num_structs; z.num_structs++)
  69                 if (!slang_struct_construct (&z.structs[z.num_structs]))
  70                 {
  71                         slang_struct_scope_destruct (&z);
  72                         return 0;
  73                 }
  74         for (i = 0; i < z.num_structs; i++)
  75                 if (!slang_struct_copy (&z.structs[i], &y->structs[i]))
  76                 {
  77                         slang_struct_scope_destruct (&z);
  78                         return 0;
  79                 }
  80         z.outer_scope = y->outer_scope;
  81         slang_struct_scope_destruct (x);
  82         *x = z;
  83         return 1;
  84 }
  85
  86 slang_struct *slang_struct_scope_find (slang_struct_scope *stru, slang_atom a_name, int all_scopes)
  87 {
  88         unsigned int i;
  89
  90         for (i = 0; i < stru->num_structs; i++)
  91                 if (a_name == stru->structs[i].a_name)
  92                         return &stru->structs[i];
  93         if (all_scopes && stru->outer_scope != NULL)
  94                 return slang_struct_scope_find (stru->outer_scope, a_name, 1);
  95         return NULL;
  96 }
  97
  98 /* slang_struct */
  99
 100 int slang_struct_construct (slang_struct *stru)
 101 {
 102         stru->a_name = SLANG_ATOM_NULL;
 103         stru->fields = (slang_variable_scope *) slang_alloc_malloc (sizeof (slang_variable_scope));
 104         if (stru->fields == NULL)
 105                 return 0;
 106    _slang_variable_scope_ctr (stru->fields);
 107         stru->structs = (slang_struct_scope *) slang_alloc_malloc (sizeof (slang_struct_scope));
 108         if (stru->structs == NULL)
 109         {
 110                 slang_variable_scope_destruct (stru->fields);
 111                 slang_alloc_free (stru->fields);
 112                 return 0;
 113         }
 114    _slang_struct_scope_ctr (stru->structs);
 115         return 1;
 116 }
 117
 118 void slang_struct_destruct (slang_struct *stru)
 119 {
 120         slang_variable_scope_destruct (stru->fields);
 121         slang_alloc_free (stru->fields);
 122         slang_struct_scope_destruct (stru->structs);
 123         slang_alloc_free (stru->structs);
 124 }
 125
 126 int slang_struct_copy (slang_struct *x, const slang_struct *y)
 127 {
 128         slang_struct z;
 129
 130         if (!slang_struct_construct (&z))
 131                 return 0;
 132         z.a_name = y->a_name;
 133         if (!slang_variable_scope_copy (z.fields, y->fields))
 134         {
 135                 slang_struct_destruct (&z);
 136                 return 0;
 137         }
 138         if (!slang_struct_scope_copy (z.structs, y->structs))
 139         {
 140                 slang_struct_destruct (&z);
 141                 return 0;
 142         }
 143         slang_struct_destruct (x);
 144         *x = z;
 145         return 1;
 146 }
 147
 148 int slang_struct_equal (const slang_struct *x, const slang_struct *y)
 149 {
 150         unsigned int i;
 151
 152         if (x->fields->num_variables != y->fields->num_variables)
 153                 return 0;
 154         for (i = 0; i < x->fields->num_variables; i++)
 155         {
 156                 slang_variable *varx = &x->fields->variables[i];
 157                 slang_variable *vary = &y->fields->variables[i];
 158
 159                 if (varx->a_name != vary->a_name)
 160                         return 0;
 161                 if (!slang_type_specifier_equal (&varx->type.specifier, &vary->type.specifier))
 162                         return 0;
 163                 if (varx->type.specifier.type == slang_spec_array)
 164                         if (varx->array_len != vary->array_len)
 165                                 return GL_FALSE;
 166         }
 167         return 1;
 168 }
 169