reactos/dll/opengl/mesa/src/glsl/glcpp/glcpp.c

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include "glcpp.h"
  28 #include "main/mtypes.h"
  29 #include "main/shaderobj.h"
  30
  31 extern int yydebug;
  32
  33 void
  34 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  35                        struct gl_shader *sh)
  36 {
  37    (void) ctx;
  38    *ptr = sh;
  39 }
  40
  41 /* Read from fp until EOF and return a string of everything read.
  42  */
  43 static char *
  44 load_text_fp (void *ctx, FILE *fp)
  45 {
  46 #define CHUNK 4096
  47         char *text = NULL;
  48         size_t text_size = 0;
  49         size_t total_read = 0;
  50         size_t bytes;
  51
  52         while (1) {
  53                 if (total_read + CHUNK + 1 > text_size) {
  54                         text_size = text_size ? text_size * 2 : CHUNK + 1;
  55                         text = reralloc_size (ctx, text, text_size);
  56                         if (text == NULL) {
  57                                 fprintf (stderr, "Out of memory\n");
  58                                 return NULL;
  59                         }
  60                 }
  61                 bytes = fread (text + total_read, 1, CHUNK, fp);
  62                 total_read += bytes;
  63
  64                 if (bytes < CHUNK) {
  65                         break;
  66                 }
  67         }
  68
  69         text[total_read] = '\0';
  70
  71         return text;
  72 }
  73
  74 static char *
  75 load_text_file(void *ctx, const char *filename)
  76 {
  77         char *text;
  78         FILE *fp;
  79
  80         if (filename == NULL || strcmp (filename, "-") == 0)
  81                 return load_text_fp (ctx, stdin);
  82
  83         fp = fopen (filename, "r");
  84         if (fp == NULL) {
  85                 fprintf (stderr, "Failed to open file %s: %s\n",
  86                          filename, strerror (errno));
  87                 return NULL;
  88         }
  89
  90         text = load_text_fp (ctx, fp);
  91
  92         fclose(fp);
  93
  94         return text;
  95 }
  96
  97 int
  98 main (int argc, char *argv[])
  99 {
 100         char *filename = NULL;
 101         void *ctx = ralloc(NULL, void*);
 102         char *info_log = ralloc_strdup(ctx, "");
 103         const char *shader;
 104         int ret;
 105
 106         if (argc) {
 107                 filename = argv[1];
 108         }
 109
 110         shader = load_text_file (ctx, filename);
 111         if (shader == NULL)
 112            return 1;
 113
 114         ret = preprocess(ctx, &shader, &info_log, NULL);
 115
 116         printf("%s", shader);
 117         fprintf(stderr, "%s", info_log);
 118
 119         ralloc_free(ctx);
 120
 121         return ret;
 122 }