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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@29669 72102866-910b-0410-8b05-ffd578937521
99 lines
3.2 KiB
Objective-C
99 lines
3.2 KiB
Objective-C
/** NSRange - range functions
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* Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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*
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* Written by: Adam Fedor <fedor@boulder.colorado.edu>
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* Date: Mar 1995
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*
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* This file is part of the GNUstep Base Library.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02111 USA.
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<title>NSRange class reference</title>
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$Date$ $Revision$
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*/
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#import "common.h"
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#define IN_NSRANGE_M 1
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#import "Foundation/NSException.h"
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#import "Foundation/NSRange.h"
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#import "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(void)
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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 *aString)
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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, aString);
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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, (int*)&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, (int*)&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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