105 lines
2.4 KiB
Objective-C
105 lines
2.4 KiB
Objective-C
#import "Constraints.h"
|
|
#import "NumberUtil.h"
|
|
|
|
@implementation NumberUtil
|
|
|
|
+ (int16_t)congruentDifferenceMod2ToThe16From:(uint16_t)s1 to:(uint16_t)s2 {
|
|
int32_t d = (int32_t)(s2 - s1);
|
|
if (d > INT16_MAX)
|
|
d -= 1 << 16;
|
|
return (int16_t)d;
|
|
}
|
|
|
|
+ (int8_t)signOfInt32:(int32_t)value {
|
|
if (value < 0)
|
|
return -1;
|
|
if (value > 0)
|
|
return +1;
|
|
return 0;
|
|
}
|
|
|
|
+ (int8_t)signOfDouble:(double)value {
|
|
if (value < 0)
|
|
return -1;
|
|
if (value > 0)
|
|
return +1;
|
|
return 0;
|
|
}
|
|
|
|
+ (NSUInteger)largestIntegerThatIsAtMost:(NSUInteger)value andIsAMultipleOf:(NSUInteger)multiple {
|
|
ows_require(multiple != 0);
|
|
NSUInteger d = value / multiple;
|
|
d *= multiple;
|
|
if (d > value)
|
|
d -= multiple;
|
|
return d;
|
|
}
|
|
|
|
+ (NSUInteger)smallestIntegerThatIsAtLeast:(NSUInteger)value andIsAMultipleOf:(NSUInteger)multiple {
|
|
ows_require(multiple != 0);
|
|
NSUInteger d = value / multiple;
|
|
d *= multiple;
|
|
if (d < value)
|
|
d += multiple;
|
|
return d;
|
|
}
|
|
|
|
+ (double)clamp:(double)value toMin:(double)min andMax:(double)max {
|
|
ows_require(min <= max);
|
|
if (value < min)
|
|
return min;
|
|
if (value > max)
|
|
return max;
|
|
return value;
|
|
}
|
|
|
|
+ (NSUInteger)from:(NSUInteger)value subtractWithSaturationAtZero:(NSUInteger)minusDelta {
|
|
return value - MIN(value, minusDelta);
|
|
}
|
|
|
|
+ (uint8_t)uint8FromLowUInt4:(uint8_t)low4UInt4 andHighUInt4:(uint8_t)highUInt4 {
|
|
ows_require(low4UInt4 < 0x10);
|
|
ows_require(highUInt4 < 0x10);
|
|
return low4UInt4 | (uint8_t)(highUInt4 << 4);
|
|
}
|
|
|
|
+ (uint8_t)lowUInt4OfUint8:(uint8_t)value {
|
|
return value & 0xF;
|
|
}
|
|
|
|
+ (uint8_t)highUInt4OfUint8:(uint8_t)value {
|
|
return value >> 4;
|
|
}
|
|
|
|
+ (NSUInteger)assertConvertIntToNSUInteger:(int)value {
|
|
assert(0 <= value);
|
|
return (NSUInteger)value;
|
|
}
|
|
|
|
+ (NSInteger)assertConvertUnsignedIntToNSInteger:(unsigned int)value {
|
|
// uint is a subset of NSInteger(long) bounds check is always true
|
|
return (NSInteger)value;
|
|
}
|
|
|
|
+ (int)assertConvertNSUIntegerToInt:(NSUInteger)value {
|
|
assert(value <= INT32_MAX);
|
|
return (int)value;
|
|
}
|
|
|
|
|
|
@end
|
|
|
|
@implementation NSNumber (NumberUtil)
|
|
|
|
- (bool)hasUnsignedIntegerValue {
|
|
return [self isEqual:@([self unsignedIntegerValue])];
|
|
}
|
|
- (bool)hasUnsignedLongLongValue {
|
|
return [self isEqual:@([self unsignedLongLongValue])];
|
|
}
|
|
- (bool)hasLongLongValue {
|
|
return [self isEqual:@([self longLongValue])];
|
|
}
|
|
|
|
@end
|