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https://github.com/gnustep/libs-base.git
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25afcc3594
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2406 72102866-910b-0410-8b05-ffd578937521
63 lines
1.4 KiB
Objective-C
63 lines
1.4 KiB
Objective-C
/* NSRange - range functions
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*/
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#include <Foundation/NSString.h>
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#include <Foundation/NSException.h>
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NSRange
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NSMakeRange(unsigned int location, unsigned int length)
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{
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NSRange range;
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unsigned int end = location + length;
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if (end < location || end < length) {
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[NSException raise:NSRangeException
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format:@"Range location + length too great"];
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}
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range.location = location;
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range.length = length;
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return range;
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}
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/* Query a Range */
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BOOL
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NSEqualRanges(NSRange range1, NSRange range2)
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{
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return ((range1.location == range2.location)
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&& (range1.length == range2.length));
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}
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/* Compute a Range from Two Other Ranges */
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NSRange
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NSUnionRange(NSRange aRange, NSRange bRange)
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{
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NSRange range;
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range.location = MIN(aRange.location, bRange.location);
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range.length = MAX(NSMaxRange(aRange), NSMaxRange(bRange))
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- range.location;
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return range;
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}
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NSRange
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NSIntersectionRange (NSRange aRange, NSRange bRange)
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{
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NSRange range;
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if (NSMaxRange(aRange) < bRange.location
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|| NSMaxRange(bRange) < aRange.location)
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return NSMakeRange(0, 0);
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range.location = MAX(aRange.location, bRange.location);
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range.length = MIN(NSMaxRange(aRange), NSMaxRange(bRange))
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- range.location;
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return range;
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}
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NSString *
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NSStringFromRange(NSRange range)
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{
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return [NSString stringWithFormat:@"{location = %d, length = %d}",
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range.location, range.length];
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}
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