Return to NXSimpleReadOnlyString.m CVS log

Up to [Apple Darwin 0.x] / objc

Annotation of objc/NXSimpleReadOnlyString.m, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.0 (the 'License').  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License."
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: /*
        !            25:        NXSimpleReadOnlyString.m
        !            26:        Copyright 1991, NeXT, Inc.
        !            27:        Responsibility:
        !            28: */
        !            29: 
        !            30: #ifndef KERNEL
        !            31: #ifdef SHLIB
        !            32: #import "shlib.h"
        !            33: #endif SHLIB
        !            34: 
        !            35: #import "NXStringPrivate.h"
        !            36: 
        !            37: @implementation NXSimpleReadOnlyString
        !            38: 
        !            39: - initFromCharactersNoCopy:(unichar *)chars length:(unsigned)len
        !            40: {
        !            41:     [super initFromCharactersNoCopy:chars length:len];
        !            42:     characters = (unichar *)chars;
        !            43:     _length = len;
        !            44:     return self;
        !            45: }
        !            46: 
        !            47: - (unichar)characterAt:(unsigned)loc
        !            48: {
        !            49:     if (loc >= _length) BOUNDSERROR;
        !            50:     return characters[loc];
        !            51: }
        !            52: 
        !            53: - (unsigned)length
        !            54: {
        !            55:     return _length;
        !            56: }
        !            57: 
        !            58: - (void)getCharacters:(unichar *)buffer range:(NXRange)range
        !            59: {
        !            60:     if (RNGLOC(range) + RNGLEN(range) > _length) BOUNDSERROR;
        !            61:     NX_CHARCOPY(characters + RNGLOC(range), buffer, RNGLEN(range));
        !            62: }
        !            63: 
        !            64: - (void)getCString:(char *)buffer maxLength:(unsigned)bytes range:(NXRange)range remainingRange:(NXRange *)leftover
        !            65: {
        !            66: #if CHARS_ARE_EIGHT_BIT
        !            67:     NXRange desiredRange = range;
        !            68:     unsigned cnt;
        !            69:     if (RNGLOC(range) + RNGLEN(range) > _length) BOUNDSERROR;
        !            70:     if (RNGLEN(range) > bytes) RNGLEN(range) = bytes;
        !            71:     for (cnt = 0; cnt < RNGLEN(range); cnt++) {
        !            72:         unichar ch = characters[RNGLOC(range) + cnt];
        !            73:        buffer[cnt] = (ch > 0x0ff) ? NX_UNREPRESENTABLE_CHARACTER : ch;
        !            74:     }
        !            75:     buffer[RNGLEN(range)] = 0;
        !            76:     if (leftover) {
        !            77:        RNGLOC(*leftover) = RNGLOC(desiredRange) + RNGLEN(range);
        !            78:        RNGLEN(*leftover) = RNGLEN(desiredRange) - RNGLEN(range);
        !            79:     }
        !            80: #else
        !            81: #warning getCString:maxLength:range:remainingRange: not implemented for Unicode
        !            82:     _NXStringErrorRaise (NXStringInternalError, "getCString:maxLength:range:remainingRange: not implemented for Unicode");
        !            83: #endif
        !            84: }
        !            85: 
        !            86: - (NXComparisonResult)compare:string mask:(unsigned int)options table:(void *)table
        !            87: {
        !            88:     unsigned ownLength = [self length], otherLength = [string length];
        !            89:     static Class simpleReadOnlyStringClass = Nil;
        !            90:     
        !            91:     if (simpleReadOnlyStringClass == Nil) simpleReadOnlyStringClass = [NXSimpleReadOnlyString class];
        !            92: 
        !            93:     if ([string isKindOf:simpleReadOnlyStringClass]) {
        !            94:        return NXCompareCharacters(characters, ((NXSimpleReadOnlyString *)string)->characters, ownLength, otherLength, options, NULL);
        !            95:     } else {
        !            96:        unichar otherBuffer[COMPARELENGTH];
        !            97:        NXRange ownRange = {0, 0}, otherRange = {0, 0};
        !            98:        NXComparisonResult res = NX_OrderedSame;
        !            99:        while (1) {
        !           100:            RNGLEN(ownRange) = MIN(ownLength - RNGLOC(ownRange), COMPARELENGTH);        
        !           101:            RNGLEN(otherRange) = MIN(otherLength - RNGLOC(otherRange), COMPARELENGTH);  
        !           102:            if (RNGLEN(ownRange) == 0 && RNGLEN(otherRange) == 0) return NX_OrderedSame;
        !           103:            [string getCharacters:otherBuffer range:otherRange];
        !           104:            if ((res = NXCompareCharacters(characters + RNGLOC(ownRange), otherBuffer, RNGLEN(ownRange), RNGLEN(otherRange), options, NULL)) != NX_OrderedSame) return res;
        !           105:            RNGLOC(ownRange) += RNGLEN(ownRange);
        !           106:            RNGLOC(otherRange) += RNGLEN(otherRange);
        !           107:        }
        !           108:     }
        !           109: }
        !           110: 
        !           111: - (NXRange)findString:(NXString *)findStr range:(NXRange)fRange mask:(unsigned int)options table:(void *)table
        !           112: {
        !           113:     unsigned findStrLen = [findStr length];    // fromLoc and toLoc are inclusive
        !           114:     NXRange range = {NX_STRING_NOT_FOUND, 0};
        !           115:     unichar tmpBuf[MAXTMPBUFFERLEN], *findBuf;
        !           116: 
        !           117:     if (RNGLOC(fRange) + RNGLEN(fRange) > _length) BOUNDSERROR;
        !           118: 
        !           119:     if (findStrLen > RNGLEN(fRange)) { // ??? This can't be here for correct Unicode compares
        !           120:        return range;
        !           121:     }
        !           122:     
        !           123:     findBuf = (findStrLen > MAXTMPBUFFERLEN) ? NX_CHARALLOC(NXDefaultMallocZone(), findStrLen) : tmpBuf;
        !           124:     [findStr getCharacters:findBuf];
        !           125: 
        !           126:     range = NXFindCharacters (findBuf, characters + RNGLOC(fRange), findStrLen, RNGLEN(fRange), options, table);
        !           127: 
        !           128:     if (RNGLOC(range) != NX_STRING_NOT_FOUND) {
        !           129:        RNGLOC(range) += RNGLOC(fRange);
        !           130:     }
        !           131: 
        !           132:     if (findBuf != tmpBuf) {
        !           133:        free(findBuf);
        !           134:     }
        !           135: 
        !           136:     return range;
        !           137: }
        !           138: 
        !           139: - (unsigned)findCharacter:(unichar)ch range:(NXRange)fRange mask:(unsigned int)options table:(void *)table
        !           140: {
        !           141:     NXRange range;
        !           142: 
        !           143:     if (RNGLOC(fRange) + RNGLEN(fRange) > _length) BOUNDSERROR;
        !           144: 
        !           145:     range = NXFindCharacters (&ch, characters + RNGLOC(fRange), 1, RNGLEN(fRange), options, table);
        !           146: 
        !           147:     return RNGLOC(range) + ((RNGLOC(range) != NX_STRING_NOT_FOUND) ? RNGLOC(fRange) : 0);
        !           148: }
        !           149: 
        !           150: - (unsigned)findOneOf:(NXCharacterSet *)set range:(NXRange)fRange mask:(unsigned int)options table:(void *)table
        !           151: {
        !           152:     int step;
        !           153:     unsigned fromLoc, toLoc, cnt;      // fromLoc and toLoc are inclusive
        !           154:     BOOL found = NO, done = NO;
        !           155: 
        !           156:     if (RNGLOC(fRange) + RNGLEN(fRange) > _length) BOUNDSERROR;
        !           157: 
        !           158:     if (options & NX_BACKWARDS_SEARCH) {
        !           159:         fromLoc = RNGLOC(fRange) + RNGLEN(fRange) - 1;
        !           160:         toLoc = RNGLOC(fRange);
        !           161:     } else {       
        !           162:         fromLoc = RNGLOC(fRange);
        !           163:         toLoc = RNGLOC(fRange) + RNGLEN(fRange) - 1;
        !           164:     }
        !           165: 
        !           166:     step = (fromLoc <= toLoc) ? 1 : -1;
        !           167:     cnt = fromLoc;
        !           168:  
        !           169:     do {
        !           170:        if ([set characterIsMember:characters[cnt]]) {
        !           171:            done = found = YES;
        !           172:         } else if (cnt == toLoc) {
        !           173:            done = YES;
        !           174:        } else {
        !           175:             cnt += step;
        !           176:         }
        !           177:     } while (!done);
        !           178: 
        !           179:     return found ? cnt : NX_STRING_NOT_FOUND;
        !           180: }
        !           181: 
        !           182: - (NXString *)copySubstring:(NXRange)range fromZone:(NXZone *)zone
        !           183: {
        !           184:     if (RNGLOC(range) + RNGLEN(range) > _length) BOUNDSERROR;
        !           185:     if (RNGLOC(range) == 0 && RNGLEN(range) == _length) {
        !           186:        return [[self class] copyFromZone:zone];
        !           187:     } else {
        !           188:        return [[[self class] allocFromZone:zone] initFromCharacters:characters + RNGLOC(range) length:RNGLEN(range)];
        !           189:     }
        !           190: }
        !           191: 
        !           192: - (unsigned)hash
        !           193: {
        !           194:     return NXHashCharacters(characters, [self length]);
        !           195: }
        !           196: 
        !           197: - copyFromZone:(NXZone *)zone
        !           198: {
        !           199:     NXSimpleReadOnlyString *newInstance = [super copyFromZone:zone];
        !           200:     newInstance->_length = _length;
        !           201:     newInstance->characters = [newInstance allocateCharacterBuffer:_length];
        !           202:     NX_CHARCOPY(characters, newInstance->characters, _length);
        !           203:     return newInstance;
        !           204: }
        !           205: 
        !           206: - free
        !           207: {
        !           208:     if (characters) {
        !           209:        free (characters);
        !           210:     }
        !           211:     return [super free];
        !           212: }
        !           213: 
        !           214: - write:(NXTypedStream *)s
        !           215: {
        !           216:     [super write:s];
        !           217:     NXWriteType (s, "i", &_length);
        !           218:     if (_length > 0) {
        !           219:        NXWriteArray (s, DATATYPEFORCHAR, _length, characters);
        !           220:     }
        !           221:     return self;
        !           222: }
        !           223: 
        !           224: - read:(NXTypedStream *)s
        !           225: {
        !           226:     [super read:s];
        !           227:     NXReadType (s, "i", &_length);
        !           228:     if (_length > 0) {
        !           229:        characters = [self allocateCharacterBuffer:_length];
        !           230:        NXReadArray (s, DATATYPEFORCHAR, _length, characters);
        !           231:     } else {
        !           232:         characters = NULL;
        !           233:     }
        !           234:     return self;
        !           235: }
        !           236: 
        !           237: @end
        !           238: #endif

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.