glcpp.c revision 29285882676388aacff123e8bdf025904abf8ea9 
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 "glcpp.h"
29
30extern int yydebug;
31
32static char *
33load_text_file(void *ctx, const char *file_name)
34{
35	char *text = NULL;
36	struct stat st;
37	ssize_t total_read = 0;
38	int fd = file_name == NULL ? STDIN_FILENO : open(file_name, O_RDONLY);
39
40	if (fd < 0) {
41		return NULL;
42	}
43
44	if (fstat(fd, & st) == 0) {
45		text = (char *) talloc_size(ctx, st.st_size + 1);
46		if (text != NULL) {
47			do {
48				ssize_t bytes = read(fd, text + total_read,
49						     st.st_size - total_read);
50				if (bytes < 0) {
51					text = NULL;
52					break;
53				}
54
55				if (bytes == 0) {
56					break;
57				}
58
59				total_read += bytes;
60			} while (total_read < st.st_size);
61
62			text[total_read] = '\0';
63		}
64	}
65
66	close(fd);
67
68	return text;
69}
70
71int
72preprocess(void *talloc_ctx, const char **shader, char **info_log);
73
74int
75main (void)
76{
77	void *ctx = talloc(NULL, void*);
78	const char *shader = load_text_file(ctx, NULL);
79	char *info_log = talloc_strdup(ctx, "");
80	int ret = preprocess(ctx, &shader, &info_log);
81
82	printf("%s", shader);
83	fprintf(stderr, "%s", info_log);
84
85	talloc_free(ctx);
86
87	return ret;
88}
89