ObjFW  Check-in [061e16d166]

 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#include <math.h>

#import "OFColor.h"
#import "OFOnce.h"
#import "OFString.h"

#import "OFInvalidArgumentException.h"

@interface OFColor ()
+ (instancetype)of_alloc;
@end

@interface OFColorSingleton: OFColor
@end

@interface OFColorPlaceholder: OFColorSingleton
@end

#ifdef OF_OBJFW_RUNTIME
@interface OFTaggedPointerColor: OFColorSingleton
@end

static const float allowedImprecision = 0.0000001;
#endif

static struct {
	Class isa;
} placeholder;

#ifdef OF_OBJFW_RUNTIME

@implementation OFColorPlaceholder
- (instancetype)initWithRed: (float)red
		      green: (float)green
		       blue: (float)blue
		      alpha: (float)alpha
{
#ifdef OF_OBJFW_RUNTIME
	uint8_t redInt = red * 255;
	uint8_t greenInt = green * 255;
	uint8_t blueInt = blue * 255;
	uint8_t redInt = nearbyintf(red * 255);
	uint8_t greenInt = nearbyintf(green * 255);
	uint8_t blueInt = nearbyintf(blue * 255);

	if (fabsf(red * 255 - redInt) < allowedImprecision &&
	if (red * 255 == redInt && green * 255 == greenInt &&
	    blue * 255 == blueInt && alpha == 1) {
	    fabsf(green * 255 - greenInt) < allowedImprecision &&
	    fabsf(blue * 255 - blueInt) < allowedImprecision && alpha == 1) {
		id ret = objc_createTaggedPointer(colorTag,
		    (uintptr_t)redInt << 16 | (uintptr_t)greenInt << 8 |
		    (uintptr_t)blueInt);

		if (ret != nil)
			return ret;
	}

- (OFString *)description
{
	float red, green, blue, alpha;

	[self getRed: &red green: &green blue: &blue alpha: &alpha];

	return [OFString stringWithFormat:
	    @"<OFColor red=%f green=%f blue=%f alpha=%f>",
	    red, green, blue, alpha];
	    @"<%@ red=%f green=%f blue=%f alpha=%f>",
	    self.class, red, green, blue, alpha];
}
@end