29 lines
1.2 KiB
C
29 lines
1.2 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/stdio/stdio.h"
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#include "libc/str/str.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 o, t = -1;
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while (0 <= (o = getchar()) && o <= 255) {
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if (!isxdigit(o)) continue;
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int h = hextoint(o);
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if (t != -1) putchar(t * 16 + h), h = -1;
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t = h;
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}
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if (ferror(stdout)) return 1;
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if (t != -1) return 2;
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return 0;
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}
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