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/* bin2c.c 4/9/1996
* convert a binary (or text) file to C.
*/
/* SPDX-FileCopyrightText: 1995,1996 Sascha Demetrio
* SPDX-FileCopyrightText: 2009, 2010, 2015, 2018, 2020 Peter Pentchev
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#if !defined(fallthrough)
#if defined(__GNUC__) && __GNUC__ >= 7
#define fallthrough __attribute__((fallthrough))
#else
#define fallthrough /* fallthrough */
#endif
#endif
static const char *usage = "\
usage: bin2c [-t] [-h] [-o outputfile] [-n name] [inputfile]\n\
-t you can use this option if the inputfile is a small (< 1K) textfile.\n\
-h display this help message.\n\
-o outputfile\n\
write the output to outputfile. the default is <stdout>.\n\
-n name\n\
the name of the C variable generated. the default is `data'\n\
if no inputfile is specified, the input is read from <stdin>.\n\
";
int
main(int argc, char **argv)
{
const char *name = "data";
FILE *in = stdin, *out = stdout;
int text_f = 0;
char *outfile = 0;
int c;
int i;
while ((c = getopt(argc, argv, "htn:o:")) != -1)
switch (c) {
case 't': /* generate a C string. this option useful only
* for *very* small text files, since some compilers
* refuse to compile extremely long strings. */
++text_f;
break;
case 'n': /* select the name of the output C array. */
name = optarg;
break;
case 'o': /* select the name of the output file. */
outfile = optarg;
break;
default:
fprintf(stderr, "%s: invalid option -- -%c\n", *argv, (char)c);
fallthrough;
case 'h':
case '?':
fputs(usage, stderr);
exit(1);
}
if (argc - optind > 1) {
fputs(usage, stderr);
exit(1);
} else if (argc - optind == 1)
if (!(in = fopen(argv[optind], "r"))) {
perror(argv[optind]);
exit(1);
}
if (outfile)
if (!(out = fopen(outfile, "w"))) {
perror(outfile);
fclose(in);
exit(1);
}
fprintf(out, "/* %s.c\n * generated by bin2c - do not edit!\n */\n\n", name);
/* SPDX-FileCopyrightText: 1995,1996 Sascha Demetrio
* SPDX-License-Identifier: BSD-3-Clause
*/
if (text_f) {
fprintf(out, "char %s[] = \"\\\n", name);
for (;;) {
c = getc(in);
if (feof(in)) break;
if (!isprint(c))
switch (c) {
case '\n':
fprintf(out, "\\n\\\n");
break;
case '\b':
fprintf(out, "\\b");
break;
default:
fprintf(out, "\\%o", (int)(unsigned char)c);
}
else
switch (c) {
case '\\':
fprintf(out, "\\\\");
break;
case '\"':
fprintf(out, "\\\"");
break;
default:
putc(c, out);
}
}
fprintf(out, "\";\n\n");
} else {
fprintf(out, "char %s[] = {", name);
for (i = 0;; ++i) {
c = getc(in);
if (feof(in)) break;
if (!(i % 8)) fprintf(out, "\n ");
fprintf(out, " 0x%02x,", (int)(unsigned char)c);
}
if (!(i % 8)) fprintf(out, "\n ");
fprintf(out, " 0\n};\n\n");
/* we write a trailing 0 so the array can be used as a string. */
}
fprintf(out, "/* end of %s.c */\n\n", name);
fclose(in);
fclose(out);
return 0;
}
/* main */
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