mojoshader-compiler.c
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/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
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#include "mojoshader.h"
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static const char **include_paths = NULL;
static unsigned int include_path_count = 0;
static int open_include(MOJOSHADER_includeType inctype, const char *fname,
const char *parent, const char **outdata,
unsigned int *outbytes, MOJOSHADER_malloc m,
MOJOSHADER_free f, void *d)
{
int i;
for (i = 0; i < include_path_count; i++)
{
const char *path = include_paths[i];
const size_t len = strlen(path) + strlen(fname) + 2;
char *buf = (char *) m(len, d);
if (buf == NULL)
return 0;
snprintf(buf, len, "%s/%s", path, fname);
FILE *io = fopen(buf, "rb");
f(buf, d);
if (io == NULL)
continue;
if (fseek(io, 0, SEEK_END) != -1)
{
const long fsize = ftell(io);
if ((fsize == -1) || (fseek(io, 0, SEEK_SET) == -1))
{
fclose(io);
return 0;
} // if
char *data = (char *) m(fsize, d);
if (data == NULL)
{
fclose(io);
return 0;
} // if
if (fread(data, fsize, 1, io) != 1)
{
f(data, d);
fclose(io);
return 0;
} // if
fclose(io);
*outdata = data;
*outbytes = (unsigned int) fsize;
return 1;
} // if
} // for
return 0;
} // open_include
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static void close_include(const char *data, MOJOSHADER_malloc m,
MOJOSHADER_free f, void *d)
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{
f((void *) data, d);
} // close_include
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static int preprocess(const char *fname, const char *buf, int len,
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const char *outfile,
const MOJOSHADER_preprocessorDefine *defs,
unsigned int defcount)
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FILE *io = outfile ? fopen(outfile, "wb") : stdout;
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if (io == NULL)
{
printf(" ... fopen('%s') failed.\n", outfile);
return 0;
} // if
const MOJOSHADER_preprocessData *pd;
int retval = 0;
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pd = MOJOSHADER_preprocess(fname, buf, len, defs, defcount,
open_include, close_include, NULL, NULL, NULL);
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if (pd->error_count > 0)
{
int i;
for (i = 0; i < pd->error_count; i++)
{
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printf("%s:%d: ERROR: %s\n",
pd->errors[i].filename ? pd->errors[i].filename : "???",
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pd->errors[i].error_position,
pd->errors[i].error);
} // for
} // if
else
{
if (pd->output != NULL)
{
if (fwrite(pd->output, pd->output_len, 1, io) != 1)
printf(" ... fwrite('%s') failed.\n", outfile);
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else if ((outfile != NULL) && (fclose(io) == EOF))
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printf(" ... fclose('%s') failed.\n", outfile);
else
retval = 1;
} // if
} // else
MOJOSHADER_freePreprocessData(pd);
return retval;
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} // preprocess
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int main(int argc, char **argv)
{
int retval = 1;
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const char *infile = NULL;
const char *outfile = NULL;
int i;
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MOJOSHADER_preprocessorDefine *defs = NULL;
unsigned int defcount = 0;
for (i = 1; i < argc; i++)
{
const char *arg = argv[i];
if (strcmp(arg, "-o") == 0)
{
if (outfile != NULL)
{
printf("multiple output files specified.\n");
exit(1);
} // if
arg = argv[++i];
if (arg == NULL)
{
printf("no filename after '-o'\n");
exit(1);
} // if
outfile = arg;
} // if
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if (strcmp(arg, "-I") == 0)
{
arg = argv[++i];
if (arg == NULL)
{
printf("no path after '-I'\n");
exit(1);
} // if
include_paths = (const char **) realloc(include_paths,
(include_path_count+1) * sizeof (char *));
include_paths[include_path_count] = arg;
include_path_count++;
} // if
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else if (strncmp(arg, "-D", 2) == 0)
{
arg += 2;
char *ident = strdup(arg);
char *ptr = strchr(ident, '=');
const char *val = "";
if (ptr)
{
*ptr = '\0';
val = ptr+1;
} // if
defs = (MOJOSHADER_preprocessorDefine *) realloc(defs,
(defcount+1) * sizeof (MOJOSHADER_preprocessorDefine));
defs[defcount].identifier = ident;
defs[defcount].definition = val;
defcount++;
} // else if
else
{
if (infile != NULL)
{
printf("multiple input files specified.\n");
exit(1);
} // if
infile = arg;
} // else
} // for
if (infile == NULL)
{
printf("no input file specified.\n");
exit(1);
} // if
FILE *io = fopen(infile, "rb");
if (io == NULL)
printf(" ... fopen('%s') failed.\n", infile);
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else
{
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fseek(io, 0, SEEK_END);
long fsize = ftell(io);
fseek(io, 0, SEEK_SET);
if (fsize == -1)
fsize = 1000000;
char *buf = (char *) malloc(fsize);
const int rc = fread(buf, 1, fsize, io);
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fclose(io);
if (rc == EOF)
printf(" ... fread('%s') failed.\n", infile);
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else
{
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if (preprocess(infile, buf, rc, outfile, defs, defcount))
retval = 0;
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else
{
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if (outfile != NULL)
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remove(outfile);
} // else
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free(buf);
} // else
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} // else
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for (i = 0; i < defcount; i++)
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free((void *) defs[i].identifier);
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free(defs);
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free(include_paths);
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return retval;
} // main
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// end of preprocess.c ...