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Annotation of gcc/objc/object.m, revision 1.1

1.1     ! root        1: /* This file contains the implementation of class Object.
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU CC.
        !             5: 
        !             6: GNU CC is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 2, or (at your option)
        !             9: any later version.
        !            10: 
        !            11: GNU CC is distributed in the hope that it will be useful,
        !            12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU CC; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19:  
        !            20: 
        !            21: #include "tconfig.h"
        !            22: #include "gstdarg.h"
        !            23: #include "object.h"
        !            24: #include "objc-proto.h"
        !            25: 
        !            26: #include <errno.h>
        !            27: #ifndef errno
        !            28: extern int errno;
        !            29: #endif
        !            30: 
        !            31: #define CLASS(class)  ((Class_t)class)
        !            32: 
        !            33: 
        !            34: @implementation Object
        !            35: 
        !            36: 
        !            37: + new
        !            38: {
        !            39:   return class_createInstance (CLASS (self));
        !            40: }
        !            41: 
        !            42: 
        !            43: + free {  return nil; }
        !            44: - free {  return object_dispose (self); }
        !            45: 
        !            46: 
        !            47: - copy {  return [self shallowCopy]; }
        !            48: 
        !            49: 
        !            50: - shallowCopy
        !            51: {
        !            52:   return object_copy (self);
        !            53: }
        !            54: 
        !            55: 
        !            56: - deepCopy
        !            57: {
        !            58:   return class_createInstance ([self class]);
        !            59: }
        !            60: 
        !            61: 
        !            62: + (Class_t)class      { return CLASS (self); }
        !            63: + (Class_t)superClass { return CLASS (self)->super_class; }
        !            64: - (Class_t)class      { return isa; }
        !            65: - (Class_t)superClass { return isa->super_class; }
        !            66: - (const char *)name  { return object_getClassName (self); }
        !            67: - self                { return self; }
        !            68: 
        !            69: 
        !            70: - (unsigned int)hash
        !            71: {
        !            72:   return (unsigned int)self; /* gak!  Not portable. */
        !            73: }
        !            74: 
        !            75: 
        !            76: - (BOOL)isEqual:anObject
        !            77: {
        !            78:   return self == anObject ;
        !            79: }
        !            80: 
        !            81: 
        !            82: - (BOOL)isKindOf:(Class_t)aClassObject
        !            83: {
        !            84:   Class_t class;
        !            85: 
        !            86:   for (class = isa; class; class = class->super_class)
        !            87:     if (class == aClassObject)
        !            88:       return YES;
        !            89: 
        !            90:   return NO;
        !            91: }
        !            92: 
        !            93: 
        !            94: - (BOOL)isMemberOf:(Class_t)aClassObject
        !            95: {
        !            96:   return isa == aClassObject ;
        !            97: }
        !            98: 
        !            99: 
        !           100: - (BOOL)isKindOfGivenName:(const char*)aClassName
        !           101: {
        !           102:   Class_t   class;
        !           103: 
        !           104:   for (class = isa; class; class = class->super_class)
        !           105:     if (!strcmp (class_getClassName (class), aClassName))
        !           106:       return YES;
        !           107: 
        !           108:   return NO;
        !           109: }
        !           110: 
        !           111: 
        !           112: - (BOOL)isMemberOfGivenName:(const char*)aClassName
        !           113: {
        !           114:   return !strcmp ([self name], aClassName);
        !           115: }
        !           116: 
        !           117: 
        !           118: + (BOOL)instancesRespondTo:(SEL)aSel
        !           119: {
        !           120:   if (class_getInstanceMethod (CLASS (self), aSel))
        !           121:     return YES;
        !           122:   
        !           123:   return NO;
        !           124: }
        !           125: 
        !           126: 
        !           127: - (BOOL)respondsTo:(SEL)aSel
        !           128: {
        !           129:   if (class_getInstanceMethod (isa, aSel))
        !           130:     return YES;
        !           131: 
        !           132:   return NO;
        !           133: }
        !           134: 
        !           135: 
        !           136: - perform:(SEL)aSel
        !           137: {
        !           138:   return (*((IMP)objc_msgSend (self, aSel)))(self, aSel);
        !           139: }
        !           140: 
        !           141: 
        !           142: - perform:(SEL)aSel with:aObject
        !           143: {
        !           144:   return (*((IMP)objc_msgSend (self, aSel)))(self, aSel, aObject);
        !           145: }
        !           146: 
        !           147: 
        !           148: + poseAs:(Class_t)aClassObject
        !           149: {
        !           150:   return class_poseAs (self, aClassObject);
        !           151: }
        !           152: 
        !           153:  
        !           154: - subclassResponsibility:(SEL)aSel
        !           155: {
        !           156:   return [self error:"subclass should override %s", aSel];
        !           157: }
        !           158: 
        !           159: 
        !           160: - notImplemented:(SEL)aSel
        !           161: {
        !           162:   return [self error:"method %s not implemented", aSel];
        !           163: }
        !           164: 
        !           165: 
        !           166: - doesNotRecognize:(SEL)aSel
        !           167: {
        !           168:   return [self error:"%s does not recognize %s", [self name], aSel];
        !           169: }
        !           170: 
        !           171: - error:(const char*)aString, ...
        !           172: {
        !           173: #define FMT "error: %s (instance)\n%s\n"
        !           174: 
        !           175:   char  fmt[strlen (FMT)
        !           176:            + strlen (isa->name)
        !           177:            + strlen (aString) + 8];
        !           178:   va_list ap;
        !           179:   
        !           180:   sprintf (fmt, FMT, isa->name, aString);
        !           181:   va_start (ap, aString);
        !           182:   (*_error)(self, fmt, ap);
        !           183:   va_end (ap);
        !           184: 
        !           185: #undef FMT
        !           186:   return self;
        !           187: }
        !           188: 
        !           189: 
        !           190: + error:(const char*)aString, ...
        !           191: {
        !           192: #define FMT "error: %s (class)\n%s\n"
        !           193: 
        !           194:   char  fmt[strlen (FMT)
        !           195:            + strlen (isa->name)
        !           196:            + strlen (aString) + 8];
        !           197:   va_list ap;
        !           198: 
        !           199:   sprintf (fmt, FMT, isa->name, aString);
        !           200:   va_start (ap, aString);
        !           201:   (*_error)(self, fmt, ap);
        !           202:   va_end (ap);
        !           203: 
        !           204: #undef FMT
        !           205:   return self;
        !           206: }
        !           207: 
        !           208: 
        !           209: - storeOn:(int)aFd
        !           210: {
        !           211:   int   len;
        !           212:   long  version = [[self class] version];
        !           213:   
        !           214:   if ((len = write (aFd, "#", strlen ("#"))) != -1)
        !           215:     if ((len = write (aFd, [self name], strlen ([self name]) + 1)) != -1)
        !           216:       len = write (aFd, &version, sizeof (version));
        !           217:   
        !           218:   if (len == -1)
        !           219:     [self error:"error passivating object, errno=%d", errno];
        !           220: 
        !           221:   return self;
        !           222: }
        !           223: 
        !           224: 
        !           225: + readFrom:(int)aFd
        !           226: {
        !           227:   id    aObj = nil;
        !           228:   char  objName[256];
        !           229:   int   len;
        !           230:   
        !           231:   
        !           232:   if ((len = read (aFd, &objName, strlen ("#"))) != -1)
        !           233:     if (objName[0] == '#') {
        !           234:       long  version;
        !           235:       int   i = 0;
        !           236:       
        !           237:       /* Read the object's class. */
        !           238:       do {
        !           239:         len = read (aFd, &objName[i], sizeof (char));
        !           240:       } while (objName[i++] && (len != -1));
        !           241:     
        !           242:       /* Get its version. */
        !           243:       if (len != -1)
        !           244:         len = read (aFd, &version, sizeof (version));
        !           245:       
        !           246:       /* No errors???
        !           247:         Then create a object. */
        !           248:       if (len != -1) {
        !           249:        aObj = class_createInstance (objc_getClass (objName));
        !           250:           
        !           251:        /* If the object was 
        !           252:           successfully created then
        !           253:           tell it to dearchive
        !           254:           itself. */
        !           255:        if (aObj)
        !           256:          [aObj readFrom:aFd];
        !           257:       }
        !           258:     }
        !           259:     
        !           260:   if (len == -1)
        !           261:     [self error:"error activating object, errno=%d", errno];
        !           262:   
        !           263:   return aObj;
        !           264: }
        !           265: 
        !           266: 
        !           267: - readFrom:(int)aFd { return self; }
        !           268: 
        !           269: 
        !           270: + (int)version
        !           271: {
        !           272:   return class_getVersion (CLASS (self));
        !           273: }
        !           274: 
        !           275: 
        !           276: + setVersion:(int)aVersion
        !           277: {
        !           278:   class_setVersion (CLASS (self), aVersion);
        !           279:   
        !           280:   return self;
        !           281: }
        !           282: 
        !           283: 
        !           284: @end
        !           285: 
        !           286: 

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