48 lines
967 B
C
48 lines
967 B
C
#include <string.h>
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#include <stdbool.h>
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bool _blkmk_hex2bin(void *o, const char *x, size_t len) {
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unsigned char *oc = o;
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unsigned char c, hc = 0x10;
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len *= 2;
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while (len)
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{
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switch (x[0]) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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c = x[0] - '0';
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break;
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case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
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c = x[0] - 'A' + 10;
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break;
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case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
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c = x[0] - 'a' + 10;
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break;
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default:
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return false;
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}
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++x;
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if (hc < 0x10)
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{
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(oc++)[0] = (hc << 4) | c;
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hc = 0x10;
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}
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else
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hc = c;
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--len;
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}
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return !x[0];
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}
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void _blkmk_bin2hex(char *out, const void *data, size_t datasz) {
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const unsigned char *datac = data;
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static char hex[] = "0123456789abcdef";
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out[datasz * 2] = '\0';
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for (size_t i = 0; i < datasz; ++i)
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{
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out[ i*2 ] = hex[datac[i] >> 4];
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out[(i*2)+1] = hex[datac[i] & 15];
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}
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}
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