29 lines
1.2 KiB
C
29 lines
1.2 KiB
C
|
/*─────────────────────────────────────────────────────────────────╗
|
||
|
|
│ To the extent possible under law, Justine Tunney has waived │
|
||
|
|
│ all copyright and related or neighboring rights to this file, │
|
||
|
|
│ as it is written in the following disclaimers: │
|
||
|
|
│ • http://unlicense.org/ │
|
||
|
|
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
|
||
|
|
╚─────────────────────────────────────────────────────────────────*/
|
||
|
|
#include "libc/stdio/stdio.h"
|
||
|
|
#include "libc/str/str.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @fileoverview Hex to binary converter program.
|
||
|
|
* Non-hex bytes are ignored. If you've got imposter syndrome you could
|
||
|
|
* call this a compiler and start coding in hex.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int main() {
|
||
|
|
int o, t = -1;
|
||
|
|
while (0 <= (o = getchar()) && o <= 255) {
|
||
|
|
if (!isxdigit(o)) continue;
|
||
|
|
int h = hextoint(o);
|
||
|
|
if (t != -1) putchar(t * 16 + h), h = -1;
|
||
|
|
t = h;
|
||
|
|
}
|
||
|
|
if (ferror(stdout)) return 1;
|
||
|
|
if (t != -1) return 2;
|
||
|
|
return 0;
|
||
|
|
}
|