39 lines
1.5 KiB
C
39 lines
1.5 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/runtime/gc.h"
|
||
|
|
#include "libc/stdio/stdio.h"
|
||
|
|
#include "libc/str/str.h"
|
||
|
|
#include "libc/x/x.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 argc, char *argv[]) {
|
||
|
|
size_t i, j, l;
|
||
|
|
uint8_t *buf;
|
||
|
|
if (argc == 1) return 1;
|
||
|
|
buf = gc(xmalloc((l = strlen(argv[1]) / 2)));
|
||
|
|
for (j = 0; j < l; ++j) {
|
||
|
|
buf[j] = 0;
|
||
|
|
}
|
||
|
|
for (i = 1; i < argc; ++i) {
|
||
|
|
for (j = 0; j < l; ++j) {
|
||
|
|
buf[j] ^= hextoint(argv[i][j + 0]) << 4 | hextoint(argv[i][j + 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for (j = 0; j < l; ++j) {
|
||
|
|
putchar("0123456789abcdef"[(buf[j] >> 4) & 0xf]);
|
||
|
|
putchar("0123456789abcdef"[(buf[j] >> 0) & 0xf]);
|
||
|
|
}
|
||
|
|
putchar('\n');
|
||
|
|
return 0;
|
||
|
|
}
|