/*
 * Mesa 3-D graphics library
 * Version:  6.5.3
 *
 * Copyright (C) 2005-2007  Brian Paul   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_struct.c
 * slang front-end compiler
 * \author Michal Krol
 */

#include "imports.h"
#include "slang_mem.h"
#include "slang_compile.h"


GLvoid
_slang_struct_scope_ctr(slang_struct_scope * self)
{
   self->structs = NULL;
   self->num_structs = 0;
   self->outer_scope = NULL;
}

void
slang_struct_scope_destruct(slang_struct_scope * scope)
{
   GLuint i;

   for (i = 0; i < scope->num_structs; i++)
      slang_struct_destruct(scope->structs + i);
   _slang_free(scope->structs);
   /* do not free scope->outer_scope */
}

int
slang_struct_scope_copy(slang_struct_scope * x, const slang_struct_scope * y)
{
   slang_struct_scope z;
   GLuint i;

   _slang_struct_scope_ctr(&z);
   z.structs = (slang_struct *)
      _slang_alloc(y->num_structs * sizeof(slang_struct));
   if (z.structs == NULL) {
      slang_struct_scope_destruct(&z);
      return 0;
   }
   for (z.num_structs = 0; z.num_structs < y->num_structs; z.num_structs++)
      if (!slang_struct_construct(&z.structs[z.num_structs])) {
         slang_struct_scope_destruct(&z);
         return 0;
      }
   for (i = 0; i < z.num_structs; i++)
      if (!slang_struct_copy(&z.structs[i], &y->structs[i])) {
         slang_struct_scope_destruct(&z);
         return 0;
      }
   z.outer_scope = y->outer_scope;
   slang_struct_scope_destruct(x);
   *x = z;
   return 1;
}

slang_struct *
slang_struct_scope_find(slang_struct_scope * stru, slang_atom a_name,
                        int all_scopes)
{
   GLuint i;

   for (i = 0; i < stru->num_structs; i++)
      if (a_name == stru->structs[i].a_name)
         return &stru->structs[i];
   if (all_scopes && stru->outer_scope != NULL)
      return slang_struct_scope_find(stru->outer_scope, a_name, 1);
   return NULL;
}

/* slang_struct */

int
slang_struct_construct(slang_struct * stru)
{
   stru->a_name = SLANG_ATOM_NULL;
   stru->fields = (slang_variable_scope *)
      _slang_alloc(sizeof(slang_variable_scope));
   if (stru->fields == NULL)
      return 0;
   _slang_variable_scope_ctr(stru->fields);

   stru->structs =
      (slang_struct_scope *) _slang_alloc(sizeof(slang_struct_scope));
   if (stru->structs == NULL) {
      slang_variable_scope_destruct(stru->fields);
      _slang_free(stru->fields);
      return 0;
   }
   _slang_struct_scope_ctr(stru->structs);
   return 1;
}

void
slang_struct_destruct(slang_struct * stru)
{
   slang_variable_scope_destruct(stru->fields);
   _slang_free(stru->fields);
   slang_struct_scope_destruct(stru->structs);
   _slang_free(stru->structs);
}

int
slang_struct_copy(slang_struct * x, const slang_struct * y)
{
   slang_struct z;

   if (!slang_struct_construct(&z))
      return 0;
   z.a_name = y->a_name;
   if (!slang_variable_scope_copy(z.fields, y->fields)) {
      slang_struct_destruct(&z);
      return 0;
   }
   if (!slang_struct_scope_copy(z.structs, y->structs)) {
      slang_struct_destruct(&z);
      return 0;
   }
   slang_struct_destruct(x);
   *x = z;
   return 1;
}

int
slang_struct_equal(const slang_struct * x, const slang_struct * y)
{
   GLuint i;

   if (x->fields->num_variables != y->fields->num_variables)
      return 0;

   for (i = 0; i < x->fields->num_variables; i++) {
      const slang_variable *varx = x->fields->variables[i];
      const slang_variable *vary = y->fields->variables[i];

      if (varx->a_name != vary->a_name)
         return 0;
      if (!slang_type_specifier_equal(&varx->type.specifier,
                                      &vary->type.specifier))
         return 0;
      if (varx->type.specifier.type == SLANG_SPEC_ARRAY)
         if (varx->array_len != vary->array_len)
            return GL_FALSE;
   }
   return 1;
}
