ObjFW  Check-in [797e00a919]

AS_IF([test x"$objc_runtime" = x"Apple"], [
	AC_CHECK_HEADER(Foundation/NSObject.h, [
		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
	])
])

AS_IF([test x"$GOBJC" = x"yes"], [
	OBJCFLAGS="$OBJCFLAGS -Wwrite-strings -Werror"
	OBJCFLAGS="$OBJCFLAGS -Wwrite-strings -Wcast-align -Wpointer-arith"
	OBJCFLAGS="$OBJCFLAGS -Werror"

	AC_MSG_CHECKING(whether gcc has bug objc/27438)
	AC_TRY_COMPILE([
		#import <objc/objc.h>

		@interface OFConstantString
		{

/**
 * \return The request type for the HTTP request
 */
- (of_http_request_type_t)requestType;

/**
 * Sets the query string for the HTTP request.
 * Only used for GET and HEAD requests!
 *
 * \param qs The query string for the HTTP request
 */
- (void)setQueryString: (OFString*)qs;

/**
 * \return The query string for the HTTP request

	return ret;
}

BOOL
of_base64_decode(OFDataArray *data, const char *str, size_t len)
{
	uint8_t *buf = (uint8_t*)str;
	const uint8_t *buf = (const uint8_t*)str;
	size_t i;

	if ((len & 3) != 0)
		return NO;

	for (i = 0; i < len; i += 4) {
		uint32_t sb = 0;