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/*
* 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"
#ifdef _MSC_VER
#include <io.h>
#define STDIN_FILENO 0
#define read _read
#define open _open
#define close _close
#endif
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;
}
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