ObjFW  Diff

	size_t length = strlen(string);
	char *copy = (char *)OFAllocMemory(1, length + 1);
	memcpy(copy, string, length + 1);

	return copy;
}

#ifdef OF_HAVE_UNICODE_TABLES
static OFString *
decomposedString(OFString *self, const char *const *const *table, size_t size)
{
	OFMutableString *ret = [OFMutableString string];
	void *pool = objc_autoreleasePoolPush();
	const OFUnichar *characters = self.characters;
	size_t length = self.length;

	for (size_t i = 0; i < length; i++) {
		OFUnichar c = characters[i];
		const char *const *page;

		if (c >= size) {
			[ret appendCharacters: &c length: 1];
			continue;
		}

		page = table[c >> 8];
		if (page != NULL && page[c & 0xFF] != NULL)
			[ret appendUTF8String: page[c & 0xFF]];
		else
			[ret appendCharacters: &c length: 1];
	}

	objc_autoreleasePoolPop(pool);

	return ret;
}
#endif

@implementation OFPlaceholderString
#ifdef __clang__
/* We intentionally don't call into super, so silence the warning. */
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wunknown-pragmas"
# pragma clang diagnostic ignored "-Wobjc-designated-initializers"
#endif

	[data retain];

	objc_autoreleasePoolPop(pool);

	return [data autorelease];
}

#ifdef OF_HAVE_UNICODE_TABLES
- (OFString *)decomposedStringWithCanonicalMapping
{
	return decomposedString(self, OFUnicodeDecompositionTable,
	    OFUnicodeDecompositionTableSize);
}

- (OFString *)decomposedStringWithCompatibilityMapping
{
	return decomposedString(self, OFUnicodeDecompositionCompatTable,
	    OFUnicodeDecompositionCompatTableSize);
}
#endif

#ifdef OF_WINDOWS
- (OFString *)stringByExpandingWindowsEnvironmentStrings
{
	if ([OFSystemInfo isWindowsNT]) {
		wchar_t buffer[512];
		size_t length;