mirror of
https://github.com/gnustep/libs-base.git
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9628d301e9
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@9548 72102866-910b-0410-8b05-ffd578937521
77 lines
2.2 KiB
Objective-C
77 lines
2.2 KiB
Objective-C
/* NSRange - range functions
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*/
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#include <config.h>
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#define IN_NSRANGE_M 1
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#include <Foundation/NSException.h>
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#include <Foundation/NSString.h>
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#include <Foundation/NSRange.h>
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#include <Foundation/NSScanner.h>
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@class NSString;
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static Class NSStringClass = 0;
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static Class NSScannerClass = 0;
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static SEL scanIntSel;
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static SEL scanStringSel;
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static SEL scannerSel;
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static BOOL (*scanIntImp)(NSScanner*, SEL, int*);
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static BOOL (*scanStringImp)(NSScanner*, SEL, NSString*, NSString**);
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static id (*scannerImp)(Class, SEL, NSString*);
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static inline void
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setupCache()
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{
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if (NSStringClass == 0)
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{
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NSStringClass = [NSString class];
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NSScannerClass = [NSScanner class];
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scanIntSel = @selector(scanInt:);
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scanStringSel = @selector(scanString:intoString:);
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scannerSel = @selector(scannerWithString:);
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scanIntImp = (BOOL (*)(NSScanner*, SEL, int*))
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[NSScannerClass instanceMethodForSelector: scanIntSel];
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scanStringImp = (BOOL (*)(NSScanner*, SEL, NSString*, NSString**))
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[NSScannerClass instanceMethodForSelector: scanStringSel];
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scannerImp = (id (*)(Class, SEL, NSString*))
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[NSScannerClass methodForSelector: scannerSel];
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}
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}
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NSRange
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NSRangeFromString(NSString* string)
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{
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NSScanner *scanner;
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NSRange range;
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setupCache();
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scanner = (*scannerImp)(NSScannerClass, scannerSel, string);
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if ((*scanStringImp)(scanner, scanStringSel, @"{", NULL)
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&& (*scanStringImp)(scanner, scanStringSel, @"location", NULL)
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&& (*scanStringImp)(scanner, scanStringSel, @"=", NULL)
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&& (*scanIntImp)(scanner, scanIntSel, &range.location)
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&& (*scanStringImp)(scanner, scanStringSel, @",", NULL)
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&& (*scanStringImp)(scanner, scanStringSel, @"length", NULL)
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&& (*scanStringImp)(scanner, scanStringSel, @"=", NULL)
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&& (*scanIntImp)(scanner, scanIntSel, &range.length)
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&& (*scanStringImp)(scanner, scanStringSel, @"}", NULL))
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return range;
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else
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return NSMakeRange(0, 0);
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}
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NSString *
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NSStringFromRange(NSRange range)
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{
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setupCache();
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return [NSStringClass stringWithFormat: @"{location=%d, length=%d}",
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range.location, range.length];
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}
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GS_EXPORT void _NSRangeExceptionRaise ()
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{
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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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