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_public.h"
  31 #include "sl_pp_context.h"
  32
  33
  34 struct sl_pp_context *
  35 sl_pp_context_create(const char *input,
  36                      const struct sl_pp_purify_options *options)
  37 {
  38    struct sl_pp_context *context;
  39
  40    context = calloc(1, sizeof(struct sl_pp_context));
  41    if (!context) {
  42       return NULL;
  43    }
  44
  45    if (sl_pp_dict_init(context)) {
  46       sl_pp_context_destroy(context);
  47       return NULL;
  48    }
  49
  50    context->getc_buf_capacity = 64;
  51    context->getc_buf = malloc(context->getc_buf_capacity * sizeof(char));
  52    if (!context->getc_buf) {
  53       sl_pp_context_destroy(context);
  54       return NULL;
  55    }
  56
  57    if (sl_pp_token_buffer_init(&context->tokens, context)) {
  58       sl_pp_context_destroy(context);
  59       return NULL;
  60    }
  61
  62    context->macro_tail = &context->macro;
  63    context->if_ptr = SL_PP_MAX_IF_NESTING;
  64    context->if_value = 1;
  65    memset(context->error_msg, 0, sizeof(context->error_msg));
  66    context->error_line = 1;
  67    context->line = 1;
  68    context->file = 0;
  69
  70    sl_pp_purify_state_init(&context->pure, input, options);
  71
  72    memset(&context->process_state, 0, sizeof(context->process_state));
  73
  74    return context;
  75 }
  76
  77 void
  78 sl_pp_context_destroy(struct sl_pp_context *context)
  79 {
  80    if (context) {
  81       free(context->cstr_pool);
  82       sl_pp_macro_free(context->macro);
  83       free(context->getc_buf);
  84       sl_pp_token_buffer_destroy(&context->tokens);
  85       free(context->process_state.out);
  86       free(context);
  87    }
  88 }
  89
  90 const char *
  91 sl_pp_context_error_message(const struct sl_pp_context *context)
  92 {
  93    return context->error_msg;
  94 }
  95
  96 void
  97 sl_pp_context_error_position(const struct sl_pp_context *context,
  98                              unsigned int *file,
  99                              unsigned int *line)
 100 {
 101    if (file) {
 102       *file = 0;
 103    }
 104    if (line) {
 105       *line = context->error_line;
 106    }
 107 }
 108
 109 int
 110 sl_pp_context_add_predefined(struct sl_pp_context *context,
 111                              const char *name,
 112                              const char *value)
 113 {
 114    struct sl_pp_predefined pre;
 115
 116    if (context->num_predefined == SL_PP_MAX_PREDEFINED) {
 117       return -1;
 118    }
 119
 120    pre.name = sl_pp_context_add_unique_str(context, name);
 121    if (pre.name == -1) {
 122       return -1;
 123    }
 124
 125    pre.value = sl_pp_context_add_unique_str(context, value);
 126    if (pre.value == -1) {
 127       return -1;
 128    }
 129
 130    context->predefined[context->num_predefined++] = pre;
 131    return 0;
 132 }
 133
 134 int
 135 sl_pp_context_add_unique_str(struct sl_pp_context *context,
 136                              const char *str)
 137 {
 138    unsigned int size;
 139    unsigned int offset = 0;
 140
 141    size = strlen(str) + 1;
 142
 143    /* Find out if this is a unique string. */
 144    while (offset < context->cstr_pool_len) {
 145       const char *str2;
 146       unsigned int size2;
 147
 148       str2 = &context->cstr_pool[offset];
 149       size2 = strlen(str2) + 1;
 150       if (size == size2 && !memcmp(str, str2, size - 1)) {
 151          return offset;
 152       }
 153
 154       offset += size2;
 155    }
 156
 157    if (context->cstr_pool_len + size > context->cstr_pool_max) {
 158       context->cstr_pool_max = (context->cstr_pool_len + size + 0xffff) & ~0xffff;
 159       context->cstr_pool = realloc(context->cstr_pool, context->cstr_pool_max);
 160    }
 161
 162    if (!context->cstr_pool) {
 163       strcpy(context->error_msg, "out of memory");
 164       return -1;
 165    }
 166
 167    offset = context->cstr_pool_len;
 168    memcpy(&context->cstr_pool[offset], str, size);
 169    context->cstr_pool_len += size;
 170
 171    return offset;
 172 }
 173
 174 const char *
 175 sl_pp_context_cstr(const struct sl_pp_context *context,
 176                    int offset)
 177 {
 178    if (offset == -1) {
 179       return NULL;
 180    }
 181    return &context->cstr_pool[offset];
 182 }