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_utility.h"
  33 #include "slang_compile_variable.h"
  34 #include "slang_compile_struct.h"
  35
  36 /* slang_struct_scope */
  37
  38 int slang_struct_scope_construct (slang_struct_scope *scope)
  39 {
  40         scope->structs = NULL;
  41         scope->num_structs = 0;
  42         scope->outer_scope = NULL;
  43         return 1;
  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         if (!slang_struct_scope_construct (&z))
  62                 return 0;
  63         z.structs = (slang_struct *) slang_alloc_malloc (y->num_structs * sizeof (slang_struct));
  64         if (z.structs == NULL)
  65         {
  66                 slang_struct_scope_destruct (&z);
  67                 return 0;
  68         }
  69         for (z.num_structs = 0; z.num_structs < y->num_structs; z.num_structs++)
  70                 if (!slang_struct_construct (&z.structs[z.num_structs]))
  71                 {
  72                         slang_struct_scope_destruct (&z);
  73                         return 0;
  74                 }
  75         for (i = 0; i < z.num_structs; i++)
  76                 if (!slang_struct_copy (&z.structs[i], &y->structs[i]))
  77                 {
  78                         slang_struct_scope_destruct (&z);
  79                         return 0;
  80                 }
  81         z.outer_scope = y->outer_scope;
  82         slang_struct_scope_destruct (x);
  83         *x = z;
  84         return 1;
  85 }
  86
  87 slang_struct *slang_struct_scope_find (slang_struct_scope *stru, slang_atom a_name, int all_scopes)
  88 {
  89         unsigned int i;
  90
  91         for (i = 0; i < stru->num_structs; i++)
  92                 if (a_name == stru->structs[i].a_name)
  93                         return &stru->structs[i];
  94         if (all_scopes && stru->outer_scope != NULL)
  95                 return slang_struct_scope_find (stru->outer_scope, a_name, 1);
  96         return NULL;
  97 }
  98
  99 /* slang_struct */
 100
 101 int slang_struct_construct (slang_struct *stru)
 102 {
 103         stru->a_name = SLANG_ATOM_NULL;
 104         stru->fields = (slang_variable_scope *) slang_alloc_malloc (sizeof (slang_variable_scope));
 105         if (stru->fields == NULL)
 106                 return 0;
 107         if (!slang_variable_scope_construct (stru->fields))
 108         {
 109                 slang_alloc_free (stru->fields);
 110                 return 0;
 111         }
 112         stru->structs = (slang_struct_scope *) slang_alloc_malloc (sizeof (slang_struct_scope));
 113         if (stru->structs == NULL)
 114         {
 115                 slang_variable_scope_destruct (stru->fields);
 116                 slang_alloc_free (stru->fields);
 117                 return 0;
 118         }
 119         if (!slang_struct_scope_construct (stru->structs))
 120         {
 121                 slang_variable_scope_destruct (stru->fields);
 122                 slang_alloc_free (stru->fields);
 123                 slang_alloc_free (stru->structs);
 124                 return 0;
 125         }
 126         return 1;
 127 }
 128
 129 void slang_struct_destruct (slang_struct *stru)
 130 {
 131         slang_variable_scope_destruct (stru->fields);
 132         slang_alloc_free (stru->fields);
 133         slang_struct_scope_destruct (stru->structs);
 134         slang_alloc_free (stru->structs);
 135 }
 136
 137 int slang_struct_copy (slang_struct *x, const slang_struct *y)
 138 {
 139         slang_struct z;
 140
 141         if (!slang_struct_construct (&z))
 142                 return 0;
 143         z.a_name = y->a_name;
 144         if (!slang_variable_scope_copy (z.fields, y->fields))
 145         {
 146                 slang_struct_destruct (&z);
 147                 return 0;
 148         }
 149         if (!slang_struct_scope_copy (z.structs, y->structs))
 150         {
 151                 slang_struct_destruct (&z);
 152                 return 0;
 153         }
 154         slang_struct_destruct (x);
 155         *x = z;
 156         return 1;
 157 }
 158
 159 int slang_struct_equal (const slang_struct *x, const slang_struct *y)
 160 {
 161         unsigned int i;
 162
 163         if (x->fields->num_variables != y->fields->num_variables)
 164                 return 0;
 165         for (i = 0; i < x->fields->num_variables; i++)
 166         {
 167                 slang_variable *varx = &x->fields->variables[i];
 168                 slang_variable *vary = &y->fields->variables[i];
 169
 170                 if (varx->a_name != vary->a_name)
 171                         return 0;
 172                 if (!slang_type_specifier_equal (&varx->type.specifier, &vary->type.specifier))
 173                         return 0;
 174                 if (varx->type.specifier.type == slang_spec_array)
 175                 {
 176                         /* TODO: compare array sizes */
 177                 }
 178         }
 179         return 1;
 180 }
 181