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/*
* Copyright 2016 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <ctype.h>
#include <lib.h>
size_t hexstrtobin(const char *str, uint8_t *buf, size_t len)
{
size_t count, ptr = 0;
uint8_t byte;
for (byte = count = 0; str && *str; str++) {
uint8_t c = *str;
if (!isxdigit(c))
continue;
if (isdigit(c))
c -= '0';
else
c = tolower(c) - 'a' + 10;
byte <<= 4;
byte |= c;
if (++count > 1) {
if (ptr >= len)
return ptr;
buf[ptr++] = byte;
byte = count = 0;
}
}
return ptr;
}
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