glcpp.c revision cf8bb19a114d753bca94f920b87dcf51aa26af99 
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
32extern int yydebug;
33
34static char *
35load_text_file(void *ctx, const char *file_name)
36{
37	char *text = NULL;
38	struct stat st;
39	ssize_t total_read = 0;
40	int fd;
41
42	if (file_name == NULL || strcmp(file_name, "-") == 0) {
43	   fd = STDIN_FILENO;
44	} else {
45	   fd = open (file_name, O_RDONLY);
46
47	   if (fd < 0) {
48	      fprintf (stderr, "Failed to open file %s: %s\n",
49		       file_name, strerror (errno));
50	      return NULL;
51	   }
52	}
53
54	if (fstat(fd, & st) == 0) {
55		text = (char *) talloc_size(ctx, st.st_size + 1);
56		if (text != NULL) {
57			do {
58				ssize_t bytes = read(fd, text + total_read,
59						     st.st_size - total_read);
60				if (bytes < 0) {
61					text = NULL;
62					break;
63				}
64
65				if (bytes == 0) {
66					break;
67				}
68
69				total_read += bytes;
70			} while (total_read < st.st_size);
71
72			text[total_read] = '\0';
73		}
74	}
75
76	close(fd);
77
78	return text;
79}
80
81int
82main (int argc, char *argv[])
83{
84	char *filename = NULL;
85	void *ctx = talloc(NULL, void*);
86	char *info_log = talloc_strdup(ctx, "");
87	const char *shader;
88	int ret;
89
90	if (argc) {
91		filename = argv[1];
92	}
93
94	shader = load_text_file(ctx, filename);
95	if (shader == NULL)
96	   return 1;
97
98	ret = preprocess(ctx, &shader, &info_log, NULL);
99
100	printf("%s", shader);
101	fprintf(stderr, "%s", info_log);
102
103	talloc_free(ctx);
104
105	return ret;
106}
107