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common.c
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common.c
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/* (c) Valentin Dudouyt, 2013 - 2014
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
void buf_to_hex(const unsigned char *buf, int len, char *str) {
int i;
str[0] = '\0';
for (i = 0; i < len; i++) {
sprintf(&str[i*2], "%02x", (int)buf[i]);
}
}
int hex_to_buf(const char *str, unsigned char *buf) {
int i, d;
assert(!(strlen(str) % 2));
char chunk[3];
for(i = 0; i < strlen(str); i+=2) {
chunk[0] = str[i];
chunk[1] = str[i+1];
chunk[2] = '\0';
sscanf(chunk, "%02x", &d);
buf[i / 2] = d;
}
return(i / 2);
}
unsigned int hex_to_int(const char *str) {
unsigned int result;
sscanf(str, "%x", &result);
return(result);
}