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28 lines
1.2 KiB
28 lines
1.2 KiB
/*─────────────────────────────────────────────────────────────────╗ |
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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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