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#import "OFOutOfMemoryException.h"
int _OFString_XMLEscaping_reference;
@implementation OFString (XMLEscaping)
- (OFString*)stringByXMLEscaping
{
char *str_c, *tmp;
char *retCString;
const char *append;
size_t len, append_len;
size_t retLength, appendLength;
size_t i, j;
OFString *ret;
j = 0;
len = length;
retLength = length;
/*
* We can't use allocMemoryWithSize: here as it might be a @"" literal
*/
if ((str_c = malloc(len)) == NULL)
if ((retCString = malloc(retLength)) == NULL)
@throw [OFOutOfMemoryException newWithClass: isa
requestedSize: len];
requestedSize: retLength];
for (i = 0; i < length; i++) {
switch (string[i]) {
case '<':
append = "<";
append_len = 4;
appendLength = 4;
break;
case '>':
append = ">";
append_len = 4;
appendLength = 4;
break;
case '"':
append = """;
append_len = 6;
appendLength = 6;
break;
case '\'':
append = "'";
append_len = 6;
appendLength = 6;
break;
case '&':
append = "&";
append_len = 5;
appendLength = 5;
break;
default:
append = NULL;
append_len = 0;
appendLength = 0;
}
if (append != NULL) {
char *newRetCString;
if ((tmp = realloc(str_c, len + append_len)) == NULL) {
free(str_c);
requestedSize: len + append_len];
requestedSize: retLength + appendLength];
}
str_c = tmp;
len += append_len - 1;
retCString = newRetCString;
retLength += appendLength - 1;
memcpy(str_c + j, append, append_len);
j += append_len;
memcpy(retCString + j, append, appendLength);
j += appendLength;
} else
str_c[j++] = string[i];
retCString[j++] = string[i];
}
assert(j == len);
assert(j == retLength);
@try {
ret = [OFString stringWithCString: str_c
length: len];
ret = [OFString stringWithCString: retCString
length: retLength];
} @finally {
free(str_c);
free(retCString);
}
return ret;
}
@end
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