/*
* Copyright (c) 2008 - 2009
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#import "OFURLEncoding.h"
#import "OFExceptions.h"
/* Reference for static linking */
int _OFURLEncoding_reference;
@implementation OFString (OFURLEncoding)
- (OFString*)stringByURLEncoding
{
const char *s;
char *ret_c;
size_t i;
OFString *ret;
s = string;
/*
* Worst case: 3 times longer than before.
* Oh, and we can't use [self allocWithSize:] here as self might be a
* @"" literal.
*/
if ((ret_c = malloc((length * 3) + 1)) == NULL)
@throw [OFOutOfMemoryException newWithClass: isa
size: (length * 3) + 1];
for (i = 0; *s != '\0'; s++) {
if (isalnum((int)*s) || *s == '-' || *s == '_' || *s == '.' ||
*s == '~')
ret_c[i++] = *s;
else {
uint8_t high, low;
high = *s >> 4;
low = *s & 0x0F;
ret_c[i++] = '%';
ret_c[i++] = (high > 9 ? high - 10 + 'A' : high + '0');
ret_c[i++] = (low > 9 ? low - 10 + 'A' : low + '0');
}
}
@try {
ret = [OFString stringWithCString: ret_c
length: i];
} @finally {
free(ret_c);
}
return ret;
}
- (OFString*)stringByURLDecoding
{
const char *s;
char *ret_c, c;
size_t i;
int st;
OFString *ret;
s = string;
if ((ret_c = malloc(length + 1)) == NULL)
@throw [OFOutOfMemoryException newWithClass: isa
size: length + 1];
for (st = 0, i = 0, c = 0; *s; s++) {
switch (st) {
case 0:
if (*s == '%')
st = 1;
else if (*s == '+')
ret_c[i++] = ' ';
else
ret_c[i++] = *s;
break;
case 1:
case 2:
if (*s >= '0' && *s <= '9')
c += (*s - '0') << (st == 1 ? 4 : 0);
else if (*s >= 'A' && *s <= 'F')
c += (*s - 'A' + 10) << (st == 1 ? 4 : 0);
else if (*s >= 'a' && *s <= 'f')
c += (*s - 'a' + 10) << (st == 1 ? 4 : 0);
else {
free(ret_c);
@throw [OFInvalidEncodingException
newWithClass: isa];
}
if (++st == 3) {
ret_c[i++] = c;
st = 0;
c = 0;
}
break;
}
}
ret_c[i] = '\0';
if (st) {
free(ret_c);
@throw [OFInvalidEncodingException newWithClass: isa];
}
@try {
ret = [OFString stringWithCString: ret_c];
} @finally {
free(ret_c);
}
return ret;
}
@end