ObjFW  Diff

	[self freeMemory: *string];
	*string = nstr;
	*length = nlen;
}

@implementation OFMutableString
- setToCString: (const char*)str
{
	size_t len;

	[self freeMemory: string];

	len = strlen(str);

		@throw [OFInvalidEncodingException newWithClass: isa];
	}

	length = len;
	string = [self allocMemoryWithSize: length + 1];
	memcpy(string, str, length + 1);

	return self;
}

- appendCString: (const char*)str
{
	size_t strlength;

	strlength = strlen(str);

	switch (of_string_check_utf8(str, strlength)) {
	case 1:
		is_utf8 = YES;
		break;
	case -1:
		@throw [OFInvalidEncodingException newWithClass: isa];
	}

	string = [self resizeMemory: string
			     toSize: length + strlength + 1];
	memcpy(string + length, str, strlength + 1);
	length += strlength;

	return self;
}

- appendCString: (const char*)str
     withLength: (size_t)len
{
	if (len > strlen(str))
		@throw [OFOutOfRangeException newWithClass: isa];

	switch (of_string_check_utf8(str, len)) {
	case 1:
		is_utf8 = YES;
		break;
	case -1:
		@throw [OFInvalidEncodingException newWithClass: isa];
	}

	string = [self resizeMemory: string
			     toSize: length + len + 1];
	memcpy(string + length, str, len);
	length += len;
	string[length] = 0;

	return self;
}

- appendCStringWithoutUTF8Checking: (const char*)str
{
	size_t strlength;

	strlength = strlen(str);
	string = [self resizeMemory: string
			     toSize: length + strlength + 1];
	memcpy(string + length, str, strlength + 1);
	length += strlength;

	return self;
}

- appendCStringWithoutUTF8Checking: (const char*)str
			    length: (size_t)len
{
	if (len > strlen(str))
		@throw [OFOutOfRangeException newWithClass: isa];

	string = [self resizeMemory: string
			     toSize: length + len + 1];
	memcpy(string + length, str, len);
	length += len;
	string[length] = 0;

	return self;
}

- appendString: (OFString*)str
{
	[self appendCString: [str cString]];

	return self;
}

- appendFormat: (OFString*)fmt, ...
{
	id ret;
	va_list args;

	va_start(args, fmt);
	ret = [self appendFormat: fmt
		   withArguments: args];
	va_end(args);

	return ret;
}

-  appendFormat: (OFString*)fmt
  withArguments: (va_list)args
{
	char *t;

	if (fmt == nil)
		@throw [OFInvalidArgumentException newWithClass: isa
						       selector: _cmd];

	if ((vasprintf(&t, [fmt cString], args)) == -1) {
		/*
		 * This is only the most likely error to happen. Unfortunately,
		 * there is no good way to check what really happened.
		 */
		@throw [OFOutOfMemoryException newWithClass: isa];
	}

	@try {
		[self appendCString: t];
	} @finally {
		free(t);
	}

	return self;
}

- reverse
{
	size_t i, j, len = length / 2;

	madvise(string, len, MADV_SEQUENTIAL);

	/* We reverse all bytes and restore UTF-8 later, if necessary */
	for (i = 0, j = length - 1; i < len; i++, j--) {
		string[i] ^= string[j];
		string[j] ^= string[i];
		string[i] ^= string[j];
	}

	if (!is_utf8) {
		madvise(string, len, MADV_NORMAL);
		return self;
	}

	for (i = 0; i < length; i++) {
		/* ASCII */
		if (OF_LIKELY(!(string[i] & 0x80)))
			continue;

		/* UTF-8 does not allow more than 4 bytes per character */
		madvise(string, len, MADV_NORMAL);
		@throw [OFInvalidEncodingException newWithClass: isa];
	}

	madvise(string, len, MADV_NORMAL);

	return self;
}

- upper
{
	apply_table(self, isa, &string, &length, is_utf8,
	    of_unicode_upper_table, OF_UNICODE_UPPER_TABLE_SIZE);

	return self;
}

- lower
{
	apply_table(self, isa, &string, &length, is_utf8,
	    of_unicode_lower_table, OF_UNICODE_LOWER_TABLE_SIZE);

	return self;
}

- removeCharactersFromIndex: (size_t)start
		    toIndex: (size_t)end
{
	if (is_utf8) {
		start = of_string_index_to_position(string, start, length);
		end = of_string_index_to_position(string, end, length);
	}

	if (start > end)

	@try {
		string = [self resizeMemory: string
				     toSize: length + 1];
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
		[e dealloc];
	}

	return self;
}

- removeCharactersInRange: (of_range_t)range
{
	return [self removeCharactersFromIndex: range.start
				       toIndex: range.start + range.length];
}

- replaceOccurrencesOfString: (OFString*)str
		  withString: (OFString*)repl
{
	const char *str_c = [str cString];
	const char *repl_c = [repl cString];
	size_t str_len = [str cStringLength];
	size_t repl_len = [repl cStringLength];
	size_t i, last, tmp_len;
	char *tmp;

	if (str_len > length)
		return self;

	tmp = NULL;
	tmp_len = 0;

	for (i = 0, last = 0; i <= length - str_len; i++) {
		if (memcmp(string + i, str_c, str_len))
			continue;

	memcpy(tmp + tmp_len, string + last, length - last);
	tmp_len += length - last;
	tmp[tmp_len] = 0;

	[self freeMemory: string];
	string = tmp;
	length = tmp_len;

	return self;
}

- removeLeadingWhitespaces
{
	size_t i;

	for (i = 0; i < length; i++)
		if (string[i] != ' '  && string[i] != '\t' &&
		    string[i] != '\n' && string[i] != '\r')
			break;

	length -= i;
	memmove(string, string + i, length);
	string[length] = '\0';

	@try {
		string = [self resizeMemory: string
				     toSize: length + 1];
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
		[e dealloc];
	}

	return self;
}

- removeTrailingWhitespaces
{
	size_t d;
	char *p;

	d = 0;
	for (p = string + length - 1; p >= string; p--) {
		if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')

	@try {
		string = [self resizeMemory: string
				     toSize: length + 1];
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
		[e dealloc];
	}

	return self;
}

- removeLeadingAndTrailingWhitespaces
{
	size_t d, i;
	char *p;

	d = 0;
	for (p = string + length - 1; p >= string; p--) {
		if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')

	@try {
		string = [self resizeMemory: string
				     toSize: length + 1];
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
		[e dealloc];
	}

	return self;
}

- (id)copy
{
	return [[OFString alloc] initWithString: self];
}
@end