/*
* bin2c.c
*
* convert a binary file into a C source array.
*
* THE "BEER-WARE LICENSE" (Revision 3.1415):
* sandro AT sigala DOT it wrote this file. As long as you retain this
* notice you can do whatever you want with this stuff. If we meet some
* day, and you think this stuff is worth it, you can buy me a beer in
* return. Sandro Sigala
*
* Subsequently modified by Joel Sherrill <joel.sherrill@oarcorp.com>
* to add a number of capabilities not in the original.
*
* syntax: bin2c [-c] [-z] <input_file> <output_file>
*
* -c do NOT add the "const" keyword to definition
* -s add the "static" keywork to definition
* -v verbose
* -z terminate the array with a zero (useful for embedded C strings)
*
* examples:
* bin2c -c myimage.png myimage_png.cpp
* bin2c -z sometext.txt sometext_txt.cpp
*
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
int useconst = 1;
int usestatic = 0;
int verbose = 0;
int zeroterminated = 0;
int createC = 1;
int createH = 1;
int myfgetc(FILE *f)
{
int c = fgetc(f);
if (c == EOF && zeroterminated) {
zeroterminated = 0;
return 0;
}
return c;
}
void process(const char *ifname, const char *ofname)
{
FILE *ifile, *ocfile, *ohfile;
char buf[PATH_MAX+1], *p;
char obasename[PATH_MAX+1];
char ocname[PATH_MAX+1];
char ohname[PATH_MAX+1];
const char *cp;
size_t len;
ocfile = NULL;
ohfile = NULL;
/* Error check */
if ( !ifname || !ofname ) {
fprintf(stderr, "process has NULL filename\n");
exit(1);
}
strncpy( obasename, ofname, PATH_MAX );
len = strlen( obasename );
if ( len >= 2 ) {
if ( obasename[len-2] == '.' ) {
if ( (obasename[len-1] == 'c') || (obasename[len-1] == 'h') )
obasename[len-2] = '\0';
}
}
sprintf( ocname, "%s.c", obasename );
sprintf( ohname, "%s.h", obasename );
if ( verbose ) {
fprintf(
stderr,
"in file: %s\n"
"c file: %s\n"
"h file: %s\n",
ifname,
ocname,
ohname
);
}
/* Open input and output files */
ifile = fopen(ifname, "rb");
if (ifile == NULL) {
fprintf(stderr, "cannot open %s for reading\n", ifname);
exit(1);
}
if ( createC ) {
ocfile = fopen(ocname, "wb");
if (ocfile == NULL) {
fprintf(stderr, "cannot open %s for writing\n", ocname);
exit(1);
}
}
if ( createH ) {
ohfile = fopen(ohname, "wb");
if (ohfile == NULL) {
fprintf(stderr, "cannot open %s for writing\n", ohname);
exit(1);
}
}
/* find basename */
char *ifbasename = strdup(ifname);
if ( ifbasename == NULL ) {
fprintf(stderr, "cannot allocate memory\n" );
fclose(ifile);
if ( createC ) { fclose(ocfile); }
if ( createH ) { fclose(ohfile); }
exit(1);
}
ifbasename = basename(ifbasename);
strcpy(buf, ifbasename);
for (p = buf; *p != '\0'; ++p) {
if (!isalnum((unsigned char)*p)) /* cast to avoid negative indexing */
*p = '_';
}
if ( createC ) {
/* print C file header */
fprintf(
ocfile,
"/*\n"
" * Declarations for C structure representing binary file %s\n"
" *\n"
" * WARNING: Automatically generated -- do not edit!\n"
" */\n"
"\n"
"#include <sys/types.h>\n"
"\n",
ifbasename
);
/* print structure */
fprintf(
ocfile,
"%s%sunsigned char %s[] = {\n ",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf
);
int c, col = 1;
while ((c = myfgetc(ifile)) != EOF) {
if (col >= 78 - 6) {
fprintf(ocfile, "\n ");
col = 1;
}
fprintf(ocfile, "0x%.2x, ", c);
col += 6;
}
fprintf(ocfile, "\n};\n");
/* print sizeof */
fprintf(
ocfile,
"\n"
"%s%ssize_t %s_size = sizeof(%s);\n",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf,
buf
);
} /* createC */
/*****************************************************************/
/****** END OF C FILE *****/
/*****************************************************************/
if ( createH ) {
/* print H file header */
char hbasename[PATH_MAX];
char* p;
/* Clean up the file name if it is an abs path */
strcpy(
hbasename,
obasename
);
p = hbasename;
while (*p != '\0') {
if (*p < '0' || *p > 'z')
*p = '_';
++p;
}
fprintf(
ohfile,
"/*\n"
" * Extern declarations for C structure representing binary file %s\n"
" *\n"
" * WARNING: Automatically generated -- do not edit!\n"
" */\n"
"\n"
"#ifndef __%s_h\n"
"#define __%s_h\n"
"\n"
"#include <sys/types.h>\n"
"\n",
ifbasename, /* header */
hbasename, /* ifndef */
hbasename /* define */
);
/* print structure */
fprintf(
ohfile,
"extern %s%sunsigned char %s[];",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf
);
/* print sizeof */
fprintf(
ohfile,
"\n"
"extern %s%ssize_t %s_size;\n",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf
);
fprintf(
ohfile,
"\n"
"#endif\n"
);
} /* createH */
/*****************************************************************/
/****** END OF H FILE *****/
/*****************************************************************/
fclose(ifile);
if ( createC ) { fclose(ocfile); }
if ( createH ) { fclose(ohfile); }
free(ifbasename);
}
void usage(void)
{
fprintf(
stderr,
"usage: bin2c [-csvzCH] <input_file> <output_file>\n"
" <input_file> is the binary file to convert\n"
" <output_file> should not have a .c or .h extension\n"
"\n"
" -c - do NOT use const in declaration\n"
" -s - do use static in declaration\n"
" -v - verbose\n"
" -z - add zero terminator\n"
" -H - create c-header only\n"
" -C - create c-source file only\n"
);
exit(1);
}
int main(int argc, char **argv)
{
while (argc > 3) {
if (!strcmp(argv[1], "-c")) {
useconst = 0;
--argc;
++argv;
} else if (!strcmp(argv[1], "-s")) {
usestatic = 1;
--argc;
++argv;
} else if (!strcmp(argv[1], "-v")) {
verbose = 1;
--argc;
++argv;
} else if (!strcmp(argv[1], "-z")) {
zeroterminated = 1;
--argc;
++argv;
} else if (!strcmp(argv[1], "-C")) {
createH = 0;
createC = 1;
--argc;
++argv;
} else if (!strcmp(argv[1], "-H")) {
createC = 0;
createH = 1;
--argc;
++argv;
} else {
usage();
}
}
if (argc != 3) {
usage();
}
/* process( input_file, output_basename ) */
process(argv[1], argv[2]);
return 0;
}
