mirror of
https://github.com/jart/cosmopolitan.git
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c776a32f75
This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
30 lines
1.3 KiB
C
30 lines
1.3 KiB
C
/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/str/tab.internal.h"
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/**
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* @fileoverview Hex to binary converter program.
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* Non-hex bytes are ignored. If you've got imposter syndrome you could
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* call this a compiler and start coding in hex.
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*/
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int main() {
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int h, o, t = -1;
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while ((o = getchar()) != -1) {
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if ((h = kHexToInt[o & 255]) != -1) {
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if (t != -1) {
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putchar(t * 16 + h);
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h = -1;
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}
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t = h;
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}
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}
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}
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