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 <sys/types.h> 25 #include <sys/stat.h> 26 #include <fcntl.h> 27 #include <unistd.h> 28 #include <string.h> 29 #include <errno.h> 30 #include "glcpp.h" 31 #include "main/mtypes.h" 32 #include "main/shaderobj.h" 33 34 extern int yydebug; 35 36 void 37 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr, 38 struct gl_shader *sh) 39 { 40 *ptr = sh; 41 } 42 43 /* Read from fd until EOF and return a string of everything read. 44 */ 45 static char * 46 load_text_fd (void *ctx, int fd) 47 { 48 #define CHUNK 4096 49 char *text = NULL; 50 ssize_t text_size = 0; 51 ssize_t total_read = 0; 52 ssize_t bytes; 53 54 while (1) { 55 if (total_read + CHUNK + 1 > text_size) { 56 text_size = text_size ? text_size * 2 : CHUNK + 1; 57 text = talloc_realloc_size (ctx, text, text_size); 58 if (text == NULL) { 59 fprintf (stderr, "Out of memory\n"); 60 return NULL; 61 } 62 } 63 bytes = read (fd, text + total_read, CHUNK); 64 if (bytes < 0) { 65 fprintf (stderr, "Error while reading: %s\n", 66 strerror (errno)); 67 talloc_free (text); 68 return NULL; 69 } 70 71 if (bytes == 0) { 72 break; 73 } 74 75 total_read += bytes; 76 } 77 78 text[total_read] = '\0'; 79 80 return text; 81 } 82 83 static char * 84 load_text_file(void *ctx, const char *filename) 85 { 86 char *text; 87 int fd; 88 89 if (filename == NULL || strcmp (filename, "-") == 0) 90 return load_text_fd (ctx, STDIN_FILENO); 91 92 fd = open (filename, O_RDONLY); 93 if (fd < 0) { 94 fprintf (stderr, "Failed to open file %s: %s\n", 95 filename, strerror (errno)); 96 return NULL; 97 } 98 99 text = load_text_fd (ctx, fd); 100 101 close(fd); 102 103 return text; 104 } 105 106 int 107 main (int argc, char *argv[]) 108 { 109 char *filename = NULL; 110 void *ctx = talloc(NULL, void*); 111 char *info_log = talloc_strdup(ctx, ""); 112 const char *shader; 113 int ret; 114 115 if (argc) { 116 filename = argv[1]; 117 } 118 119 shader = load_text_file (ctx, filename); 120 if (shader == NULL) 121 return 1; 122 123 ret = preprocess(ctx, &shader, &info_log, NULL, API_OPENGL); 124 125 printf("%s", shader); 126 fprintf(stderr, "%s", info_log); 127 128 talloc_free(ctx); 129 130 return ret; 131 } 132