src/mesa/shader/slang/slang_compile_struct.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.3
   4  *
   5  * Copyright (C) 2005-2007  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 "main/imports.h"
  32 #include "slang_mem.h"
  33 #include "slang_compile.h"
  34
  35
  36 GLvoid
  37 _slang_struct_scope_ctr(slang_struct_scope * self)
  38 {
  39    self->structs = NULL;
  40    self->num_structs = 0;
  41    self->outer_scope = NULL;
  42 }
  43
  44 void
  45 slang_struct_scope_destruct(slang_struct_scope * scope)
  46 {
  47    GLuint i;
  48
  49    for (i = 0; i < scope->num_structs; i++)
  50       slang_struct_destruct(scope->structs + i);
  51    _slang_free(scope->structs);
  52    /* do not free scope->outer_scope */
  53 }
  54
  55 int
  56 slang_struct_scope_copy(slang_struct_scope * x, const slang_struct_scope * y)
  57 {
  58    slang_struct_scope z;
  59    GLuint i;
  60
  61    _slang_struct_scope_ctr(&z);
  62    z.structs = (slang_struct *)
  63       _slang_alloc(y->num_structs * sizeof(slang_struct));
  64    if (z.structs == NULL) {
  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          slang_struct_scope_destruct(&z);
  71          return 0;
  72       }
  73    for (i = 0; i < z.num_structs; i++)
  74       if (!slang_struct_copy(&z.structs[i], &y->structs[i])) {
  75          slang_struct_scope_destruct(&z);
  76          return 0;
  77       }
  78    z.outer_scope = y->outer_scope;
  79    slang_struct_scope_destruct(x);
  80    *x = z;
  81    return 1;
  82 }
  83
  84 slang_struct *
  85 slang_struct_scope_find(slang_struct_scope * stru, slang_atom a_name,
  86                         int all_scopes)
  87 {
  88    GLuint 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
 101 slang_struct_construct(slang_struct * stru)
 102 {
 103    stru->a_name = SLANG_ATOM_NULL;
 104    stru->fields = (slang_variable_scope *)
 105       _slang_alloc(sizeof(slang_variable_scope));
 106    if (stru->fields == NULL)
 107       return 0;
 108    _slang_variable_scope_ctr(stru->fields);
 109
 110    stru->structs =
 111       (slang_struct_scope *) _slang_alloc(sizeof(slang_struct_scope));
 112    if (stru->structs == NULL) {
 113       slang_variable_scope_destruct(stru->fields);
 114       _slang_free(stru->fields);
 115       return 0;
 116    }
 117    _slang_struct_scope_ctr(stru->structs);
 118    stru->constructor = NULL;
 119    return 1;
 120 }
 121
 122 void
 123 slang_struct_destruct(slang_struct * stru)
 124 {
 125    slang_variable_scope_destruct(stru->fields);
 126    _slang_free(stru->fields);
 127    slang_struct_scope_destruct(stru->structs);
 128    _slang_free(stru->structs);
 129 }
 130
 131 int
 132 slang_struct_copy(slang_struct * x, const slang_struct * y)
 133 {
 134    slang_struct z;
 135
 136    if (!slang_struct_construct(&z))
 137       return 0;
 138    z.a_name = y->a_name;
 139    if (!slang_variable_scope_copy(z.fields, y->fields)) {
 140       slang_struct_destruct(&z);
 141       return 0;
 142    }
 143    if (!slang_struct_scope_copy(z.structs, y->structs)) {
 144       slang_struct_destruct(&z);
 145       return 0;
 146    }
 147    slang_struct_destruct(x);
 148    *x = z;
 149    return 1;
 150 }
 151
 152 int
 153 slang_struct_equal(const slang_struct * x, const slang_struct * y)
 154 {
 155    GLuint i;
 156
 157    if (x->fields->num_variables != y->fields->num_variables)
 158       return 0;
 159
 160    for (i = 0; i < x->fields->num_variables; i++) {
 161       const slang_variable *varx = x->fields->variables[i];
 162       const slang_variable *vary = y->fields->variables[i];
 163
 164       if (varx->a_name != vary->a_name)
 165          return 0;
 166       if (!slang_type_specifier_equal(&varx->type.specifier,
 167                                       &vary->type.specifier))
 168          return 0;
 169       if (varx->type.specifier.type == SLANG_SPEC_ARRAY)
 170          if (varx->array_len != vary->array_len)
 171             return GL_FALSE;
 172    }
 173    return 1;
 174 }