minix/drivers/ramdisk/bintoc.c

130 lines
2 KiB
C
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/*
bintoc.c
Convert a (binary) file to a series of comma separated hex values suitable
for initializing a character array in C.
*/
#define _POSIX_C_SOURCE 2
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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static char *progname;
static unsigned char buf[1024];
static void fatal(char *fmt, ...);
static void usage(void);
int main(int argc, char *argv[])
{
int c, i, r, first;
FILE *file_in, *file_out;
char *in_name;
char *o_arg;
(progname=strrchr(argv[0],'/')) ? progname++ : (progname=argv[0]);
o_arg= NULL;
while (c= getopt(argc, argv, "?o:"), c != -1)
{
switch(c)
{
case '?': usage();
case 'o': o_arg= optarg; break;
default: fatal("getopt failed: '%c'\n", c);
}
}
if (o_arg)
{
file_out= fopen(o_arg, "w");
if (file_out == NULL)
{
fatal("unable to create '%s': %s\n",
o_arg, strerror(errno));
exit(1);
}
}
else
file_out= stdout;
if (optind < argc)
{
in_name= argv[optind];
optind++;
file_in= fopen(in_name, "r");
if (file_in == NULL)
{
fatal("unable to open '%s': %s",
in_name, strerror(errno));
}
}
else
{
in_name= "(stdin)";
file_in= stdin;
}
if (optind != argc)
usage();
first= 1;
for (;;)
{
r= fread(buf, 1, sizeof(buf), file_in);
if (r == 0)
break;
for (i= 0; i<r; i++)
{
if ((i % 8) == 0)
{
if (first)
{
fprintf(file_out, "\t");
first= 0;
}
else
fprintf(file_out, ",\n\t");
}
else
fprintf(file_out, ", ");
fprintf(file_out, "0x%02x", buf[i]);
}
}
if (ferror(file_in))
{
fatal("read error on %s: %s\n",
in_name, strerror(errno));
}
fprintf(file_out, "\n");
exit(0);
}
static void fatal(char *fmt, ...)
{
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
static void usage(void)
{
fprintf(stderr, "Usage: bintoc [-o <out-file>] [<in-file>]\n");
exit(1);
}