64 lines
931 B
C
64 lines
931 B
C
/*
|
|
* hex2bin - simple hex to bin filter
|
|
* antirez@invece.org - under GPL version 2
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
int hex2bin(void)
|
|
{
|
|
char hex[3];
|
|
int d = 0;
|
|
unsigned char c;
|
|
int stdin_fd = fileno(stdin);
|
|
int n_read;
|
|
|
|
while((n_read = read(stdin_fd, hex, 2)) > 0)
|
|
{
|
|
if (n_read == 1)
|
|
{
|
|
if (hex[0] != '\n')
|
|
{
|
|
fprintf(stderr,
|
|
"input parse error, odd digits in hex file\n");
|
|
exit(1);
|
|
}
|
|
else
|
|
exit(1);
|
|
}
|
|
hex[2] = '\0';
|
|
sscanf(hex, "%x", &d);
|
|
c = (unsigned char) d;
|
|
printf("%c", c);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int bin2hex(void)
|
|
{
|
|
int stdin_fd = fileno(stdin);
|
|
int n_read;
|
|
unsigned char c;
|
|
|
|
while((n_read = read(stdin_fd, &c, 1)) > 0)
|
|
{
|
|
printf("%.2x", c);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
if (argc >= 2 && strstr(argv[1], "-r"))
|
|
bin2hex();
|
|
else
|
|
hex2bin();
|
|
|
|
return 0;
|
|
}
|