1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include "glcpp.h"
#include "main/mtypes.h"
#include "main/shaderobj.h"
extern int glcpp_parser_debug;
void
_mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
struct gl_shader *sh)
{
(void) ctx;
*ptr = sh;
}
/* Read from fp until EOF and return a string of everything read.
*/
static char *
load_text_fp (void *ctx, FILE *fp)
{
#define CHUNK 4096
char *text = NULL;
size_t text_size = 0;
size_t total_read = 0;
size_t bytes;
while (1) {
if (total_read + CHUNK + 1 > text_size) {
text_size = text_size ? text_size * 2 : CHUNK + 1;
text = reralloc_size (ctx, text, text_size);
if (text == NULL) {
fprintf (stderr, "Out of memory\n");
return NULL;
}
}
bytes = fread (text + total_read, 1, CHUNK, fp);
total_read += bytes;
if (bytes < CHUNK) {
break;
}
}
text[total_read] = '\0';
return text;
}
static char *
load_text_file(void *ctx, const char *filename)
{
char *text;
FILE *fp;
if (filename == NULL || strcmp (filename, "-") == 0)
return load_text_fp (ctx, stdin);
fp = fopen (filename, "r");
if (fp == NULL) {
fprintf (stderr, "Failed to open file %s: %s\n",
filename, strerror (errno));
return NULL;
}
text = load_text_fp (ctx, fp);
fclose(fp);
return text;
}
/* Initialize only those things that glcpp cares about.
*/
static void
init_fake_gl_context (struct gl_context *gl_ctx)
{
gl_ctx->API = API_OPENGL_COMPAT;
gl_ctx->Const.DisableGLSLLineContinuations = false;
}
static void
usage (void)
{
fprintf (stderr,
"Usage: glcpp [OPTIONS] [--] [<filename>]\n"
"\n"
"Pre-process the given filename (stdin if no filename given).\n"
"The following options are supported:\n"
" --disable-line-continuations Do not interpret lines ending with a\n"
" backslash ('\\') as a line continuation.\n");
}
enum {
DISABLE_LINE_CONTINUATIONS_OPT = CHAR_MAX + 1
};
const static struct option
long_options[] = {
{"disable-line-continuations", no_argument, 0, DISABLE_LINE_CONTINUATIONS_OPT },
{"debug", no_argument, 0, 'd'},
{0, 0, 0, 0 }
};
int
main (int argc, char *argv[])
{
char *filename = NULL;
void *ctx = ralloc(NULL, void*);
char *info_log = ralloc_strdup(ctx, "");
const char *shader;
int ret;
struct gl_context gl_ctx;
int c;
init_fake_gl_context (&gl_ctx);
while ((c = getopt_long(argc, argv, "d", long_options, NULL)) != -1) {
switch (c) {
case DISABLE_LINE_CONTINUATIONS_OPT:
gl_ctx.Const.DisableGLSLLineContinuations = true;
break;
case 'd':
glcpp_parser_debug = 1;
break;
default:
usage ();
exit (1);
}
}
if (optind + 1 < argc) {
printf ("Unexpected argument: %s\n", argv[optind+1]);
usage ();
exit (1);
}
if (optind < argc) {
filename = argv[optind];
}
shader = load_text_file (ctx, filename);
if (shader == NULL)
return 1;
ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, &gl_ctx);
printf("%s", shader);
fprintf(stderr, "%s", info_log);
ralloc_free(ctx);
return ret;
}
|
