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/*
Copyright (C) 2010 ABRT team
Copyright (C) 2010 RedHat Inc
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
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.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "libreport.h"
static const char hexdigits_locase[] = "0123456789abcdef";
/* Emit a string of hex representation of bytes */
char *bin2hex(char *dst, const char *str, int count)
{
while (count) {
unsigned char c = *str++;
/* put lowercase hex digits */
*dst++ = hexdigits_locase[c >> 4];
*dst++ = hexdigits_locase[c & 0xf];
count--;
}
return dst;
}
/* Convert "xxxxxxxx" hex string to binary, no more than COUNT bytes */
char *hex2bin(char *dst, const char *str, int count)
{
/* Parts commented out with // allow parsing
* of strings like "xx:x:x:xx:xx:xx:xxxxxx"
* (IPv6, ethernet addresses and the like).
*/
errno = EINVAL;
while (*str && count) {
uint8_t val;
uint8_t c;
c = *str++;
if (isdigit(c))
val = c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val = (c|0x20) - ('a' - 10);
else
return NULL;
val <<= 4;
c = *str;
if (isdigit(c))
val |= c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val |= (c|0x20) - ('a' - 10);
//else if (c == ':' || c == '\0')
// val >>= 4;
else
return NULL;
*dst++ = val;
//if (c != '\0')
str++;
//if (*str == ':')
// str++;
count--;
}
errno = (*str ? ERANGE : 0);
return dst;
}
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