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/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Curl.
*
* The Initial Developer of the Original Code is Daniel Stenberg.
*
* Portions created by the Initial Developer are Copyright (C) 1998.
* All Rights Reserved.
*
* ------------------------------------------------------------
* Main author:
* - Daniel Stenberg <Daniel.Stenberg@haxx.nu>
*
* http://curl.haxx.nu
*
* $Source$
* $Revision$
* $Date$
* $Author$
* $State$
* $Locker$
*
* ------------------------------------------------------------
****************************************************************************/
/* Escape and unescape URL encoding in strings. The functions return a new
* allocated string or NULL if an error occurred. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *curl_escape(char *string)
{
int alloc=strlen(string)+1;
char *ns = malloc(alloc);
unsigned char in;
int newlen = alloc;
int index=0;
while(*string) {
in = *string;
if(' ' == in)
ns[index++] = '+';
else if(!(in >= 'a' && in <= 'z') &&
!(in >= 'A' && in <= 'Z') &&
!(in >= '0' && in <= '9')) {
/* encode it */
newlen += 2; /* the size grows with two, since this'll become a %XX */
if(newlen > alloc) {
alloc *= 2;
ns = realloc(ns, alloc);
if(!ns)
return NULL;
}
sprintf(&ns[index], "%%%02X", in);
index+=3;
}
else {
/* just copy this */
ns[index++]=in;
}
string++;
}
ns[index]=0; /* terminate it */
return ns;
}
char *curl_unescape(char *string, int length)
{
int alloc = (length?length:strlen(string))+1;
char *ns = malloc(alloc);
unsigned char in;
int index=0;
int hex;
while(--alloc) {
in = *string;
if('+' == in)
in = ' ';
else if('%' == in) {
/* encoded part */
if(sscanf(string+1, "%02X", &hex)) {
in = hex;
string+=2;
}
}
ns[index++] = in;
string++;
}
ns[index]=0; /* terminate it */
return ns;
}
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