actube/src/cw/bstr_create_from_cfgstr.c

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/*
This file is part of libcapwap.
libcapwap 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.
libcapwap 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief bstr_create_from_cfgstr function
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "bstr.h"
/**
* Create a bstr_t string from a string read from config file.
*
* @param s String from config file.
* @return The create bstr_t string.
*
* The string from config file is an ASCII-text which is interpreted
* as hexadecimal string if it starts with ".x"
*
* @see bstr_t
*/
uint8_t * bstr_create_from_cfgstr(const char * s)
{
int l = strlen(s);
if (s[0]!='.')
return bstr_create((uint8_t*)s,l);
if (l<=2)
return bstr_create((uint8_t*)s,l);
if (s[1]=='.')
return bstr_create((uint8_t*)s+1,l-1);
if (s[1]=='x'){
uint8_t * ns=0;
int len=0;
int ch,cl;
const char *ss = s+2;
int rc ;
do {
rc = sscanf(ss,"%01X",&ch);
if (rc!=1)
break;
ss++;
rc = sscanf(ss,"%01X",&cl);
if (rc!=1)
cl=0;
ss++;
int c=(ch<<4) | cl;
len++;
ns = realloc(ns,len);
ns[len-1]=c;
}while (rc==1);
return bstr_create(ns,len);
}
return NULL;
}