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