src/glsl/pp/sl_pp_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include "sl_pp_macro.h"
  31 #include "sl_pp_public.h"
  32 #include "sl_pp_context.h"
  33
  34
  35 struct sl_pp_context *
  36 sl_pp_context_create(const char *input,
  37                      const struct sl_pp_purify_options *options)
  38 {
  39    struct sl_pp_context *context;
  40
  41    context = calloc(1, sizeof(struct sl_pp_context));
  42    if (!context) {
  43       return NULL;
  44    }
  45
  46    if (sl_pp_dict_init(context)) {
  47       sl_pp_context_destroy(context);
  48       return NULL;
  49    }
  50
  51    context->getc_buf_capacity = 64;
  52    context->getc_buf = malloc(context->getc_buf_capacity * sizeof(char));
  53    if (!context->getc_buf) {
  54       sl_pp_context_destroy(context);
  55       return NULL;
  56    }
  57
  58    if (sl_pp_token_buffer_init(&context->tokens, context)) {
  59       sl_pp_context_destroy(context);
  60       return NULL;
  61    }
  62
  63    context->macro_tail = &context->macro;
  64    context->if_ptr = SL_PP_MAX_IF_NESTING;
  65    context->if_value = 1;
  66    memset(context->error_msg, 0, sizeof(context->error_msg));
  67    context->error_line = 1;
  68    context->line = 1;
  69    context->file = 0;
  70
  71    sl_pp_purify_state_init(&context->pure, input, options);
  72
  73    memset(&context->process_state, 0, sizeof(context->process_state));
  74
  75    return context;
  76 }
  77
  78 void
  79 sl_pp_context_destroy(struct sl_pp_context *context)
  80 {
  81    if (context) {
  82       free(context->cstr_pool);
  83       sl_pp_macro_free(context->macro);
  84       free(context->getc_buf);
  85       sl_pp_token_buffer_destroy(&context->tokens);
  86       free(context->process_state.out);
  87       free(context);
  88    }
  89 }
  90
  91 const char *
  92 sl_pp_context_error_message(const struct sl_pp_context *context)
  93 {
  94    return context->error_msg;
  95 }
  96
  97 void
  98 sl_pp_context_error_position(const struct sl_pp_context *context,
  99                              unsigned int *file,
 100                              unsigned int *line)
 101 {
 102    if (file) {
 103       *file = 0;
 104    }
 105    if (line) {
 106       *line = context->error_line;
 107    }
 108 }
 109
 110 int
 111 sl_pp_context_add_predefined(struct sl_pp_context *context,
 112                              const char *name,
 113                              const char *value)
 114 {
 115    struct sl_pp_predefined pre;
 116
 117    if (context->num_predefined == SL_PP_MAX_PREDEFINED) {
 118       return -1;
 119    }
 120
 121    pre.name = sl_pp_context_add_unique_str(context, name);
 122    if (pre.name == -1) {
 123       return -1;
 124    }
 125
 126    pre.value = sl_pp_context_add_unique_str(context, value);
 127    if (pre.value == -1) {
 128       return -1;
 129    }
 130
 131    context->predefined[context->num_predefined++] = pre;
 132    return 0;
 133 }
 134
 135 int
 136 sl_pp_context_add_unique_str(struct sl_pp_context *context,
 137                              const char *str)
 138 {
 139    unsigned int size;
 140    unsigned int offset = 0;
 141
 142    size = strlen(str) + 1;
 143
 144    /* Find out if this is a unique string. */
 145    while (offset < context->cstr_pool_len) {
 146       const char *str2;
 147       unsigned int size2;
 148
 149       str2 = &context->cstr_pool[offset];
 150       size2 = strlen(str2) + 1;
 151       if (size == size2 && !memcmp(str, str2, size - 1)) {
 152          return offset;
 153       }
 154
 155       offset += size2;
 156    }
 157
 158    if (context->cstr_pool_len + size > context->cstr_pool_max) {
 159       context->cstr_pool_max = (context->cstr_pool_len + size + 0xffff) & ~0xffff;
 160       context->cstr_pool = realloc(context->cstr_pool, context->cstr_pool_max);
 161    }
 162
 163    if (!context->cstr_pool) {
 164       strcpy(context->error_msg, "out of memory");
 165       return -1;
 166    }
 167
 168    offset = context->cstr_pool_len;
 169    memcpy(&context->cstr_pool[offset], str, size);
 170    context->cstr_pool_len += size;
 171
 172    return offset;
 173 }
 174
 175 const char *
 176 sl_pp_context_cstr(const struct sl_pp_context *context,
 177                    int offset)
 178 {
 179    if (offset == -1) {
 180       return NULL;
 181    }
 182    return &context->cstr_pool[offset];
 183 }