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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* 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.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#import "OFString.h"
#import "OFOutOfMemoryException.h"
int _OFString_XMLEscaping_reference;
@implementation OFString (XMLEscaping)
- (OFString*)stringByXMLEscaping
{
char *retCString;
const char *string, *append;
size_t length, retLength, appendLen;
size_t i, j;
OFString *ret;
string = [self UTF8String];
length = [self UTF8StringLength];
j = 0;
retLength = length;
/*
* We can't use allocMemoryWithSize: here as it might be a @"" literal
*/
if ((retCString = malloc(retLength)) == NULL)
@throw [OFOutOfMemoryException exceptionWithClass: [self class]
requestedSize: retLength];
for (i = 0; i < length; i++) {
switch (string[i]) {
case '<':
append = "&lt;";
appendLen = 4;
break;
case '>':
append = "&gt;";
appendLen = 4;
break;
case '"':
append = "&quot;";
appendLen = 6;
break;
case '\'':
append = "&apos;";
appendLen = 6;
break;
case '&':
append = "&amp;";
appendLen = 5;
break;
case '\r':
append = "&#xD;";
appendLen = 5;
break;
default:
append = NULL;
appendLen = 0;
}
if (append != NULL) {
char *newRetCString;
if ((newRetCString = realloc(retCString,
retLength + appendLen)) == NULL) {
free(retCString);
@throw [OFOutOfMemoryException
exceptionWithClass: [self class]
requestedSize: retLength + appendLen];
}
retCString = newRetCString;
retLength += appendLen - 1;
memcpy(retCString + j, append, appendLen);
j += appendLen;
} else
retCString[j++] = string[i];
}
assert(j == retLength);
@try {
ret = [OFString stringWithUTF8String: retCString
length: retLength];
} @finally {
free(retCString);
}
return ret;
}
@end
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