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26 lines
558 B
C
26 lines
558 B
C
#include "hexparse.h"
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static int hexdigit(char x)
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{
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if (x >= '0' && x <= '9') return x - '0';
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if (x >= 'a' && x <= 'f') return 10 + (x - 'a');
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if (x >= 'A' && x <= 'F') return 10 + (x - 'A');
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return -1;
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}
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int hexparse(unsigned char *y,long long len,const char *x)
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{
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if (!x) return 0;
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while (len > 0) {
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int digit0;
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int digit1;
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digit0 = hexdigit(x[0]); if (digit0 == -1) return 0;
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digit1 = hexdigit(x[1]); if (digit1 == -1) return 0;
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*y++ = digit1 + 16 * digit0;
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--len;
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x += 2;
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}
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if (x[0]) return 0;
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return 1;
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}
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