ObjFW  Diff

#import "OFUnknownXMLEntityException.h"

int _OFString_XMLUnescaping_reference;

static OF_INLINE OFString *
parseNumericEntity(const char *entity, size_t length)
{
	of_unichar_t c;
	size_t i;
	char buffer[5];

	if (length == 1 || *entity != '#')
		return nil;

	c = 0;

			if (entity[i] >= '0' && entity[i] <= '9')
				c = (c * 10) + (entity[i] - '0');
			else
				return nil;
		}
	}

	if ((i = of_string_utf8_encode(c, buffer)) == 0)
		return nil;
	buffer[i] = 0;

	return [OFString stringWithUTF8String: buffer
				       length: i];
}

static OFString *
parseEntities(OFString *self, id (*lookup)(void *, OFString *, OFString *),
    void *context)
{
	OFMutableString *ret;

	length = self.UTF8StringLength;

	last = 0;
	inEntity = false;

	for (i = 0; i < length; i++) {
		if (!inEntity && string[i] == '&') {
			[ret appendUTF8String: string + last
				       length: i - last];

			last = i + 1;
			inEntity = true;
		} else if (inEntity && string[i] == ';') {
			const char *entity = string + last;
			size_t entityLength = i - last;

			if (entityLength == 2 && memcmp(entity, "lt", 2) == 0)
				[ret appendCString: "<"
					  encoding: OF_STRING_ENCODING_ASCII
					    length: 1];
			else if (entityLength == 2 &&
			    memcmp(entity, "gt", 2) == 0)
				[ret appendCString: ">"
					  encoding: OF_STRING_ENCODING_ASCII
					    length: 1];
			else if (entityLength == 4 &&
			    memcmp(entity, "quot", 4) == 0)
				[ret appendCString: "\""
					  encoding: OF_STRING_ENCODING_ASCII
					    length: 1];
			else if (entityLength == 4 &&
			    memcmp(entity, "apos", 4) == 0)
				[ret appendCString: "'"
					  encoding: OF_STRING_ENCODING_ASCII
					    length: 1];
			else if (entityLength == 3 &&
			    memcmp(entity, "amp", 3) == 0)
				[ret appendCString: "&"
					  encoding: OF_STRING_ENCODING_ASCII
					    length: 1];
			else if (entity[0] == '#') {
				void *pool2;
				OFString *tmp;

				pool2 = objc_autoreleasePoolPush();
				tmp = parseNumericEntity(entity,

			inEntity = false;
		}
	}

	if (inEntity)
		@throw [OFInvalidFormatException exception];

	[ret appendUTF8String: string + last
		       length: i - last];

	[ret makeImmutable];

	objc_autoreleasePoolPop(pool);

	return ret;
}

static id
lookupUsingDelegate(void *context, OFString *self, OFString *entity)
{
	id <OFStringXMLUnescapingDelegate> delegate = context;

	if (delegate == nil)
		return nil;

	return [delegate        string: self
	    containsUnknownEntityNamed: entity];
}

#ifdef OF_HAVE_BLOCKS
static id
lookupUsingBlock(void *context, OFString *self, OFString *entity)
{
	of_string_xml_unescaping_block_t block = context;

	if (block == NULL)
		return nil;

	return block(self, entity);
}
#endif

- (OFString *)stringByXMLUnescapingWithDelegate:
    (id <OFStringXMLUnescapingDelegate>)delegate
{
	return parseEntities(self, lookupUsingDelegate, delegate);
}

#ifdef OF_HAVE_BLOCKS
- (OFString *)stringByXMLUnescapingWithBlock:
    (of_string_xml_unescaping_block_t)block
{
	return parseEntities(self, lookupUsingBlock, block);
}
#endif
@end