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Annotation of qemu/roms/openbios/fs/hfs/data.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * libhfs - library for reading and writing Macintosh HFS volumes
        !             3:  * Copyright (C) 1996-1998 Robert Leslie
        !             4:  *
        !             5:  * This program is free software; you can redistribute it and/or modify
        !             6:  * it under the terms of the GNU General Public License as published by
        !             7:  * the Free Software Foundation; either version 2 of the License, or
        !             8:  * (at your option) any later version.
        !             9:  *
        !            10:  * This program is distributed in the hope that it will be useful,
        !            11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            13:  * GNU General Public License for more details.
        !            14:  *
        !            15:  * You should have received a copy of the GNU General Public License
        !            16:  * along with this program; if not, write to the Free Software
        !            17:  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
        !            18:  * MA 02110-1301, USA.
        !            19:  *
        !            20:  * $Id: data.c,v 1.7 1998/11/02 22:08:57 rob Exp $
        !            21:  */
        !            22: 
        !            23: #include "config.h"
        !            24: #include "data.h"
        !            25: 
        !            26: #define TIMEDIFF  2082844800UL
        !            27: 
        !            28: static
        !            29: time_t tzdiff = -1;
        !            30: 
        !            31: static const
        !            32: unsigned char hfs_charorder[256] = {
        !            33:   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
        !            34:   0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
        !            35:   0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
        !            36:   0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
        !            37: 
        !            38:   0x20, 0x22, 0x23, 0x28, 0x29, 0x2a, 0x2b, 0x2c,
        !            39:   0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
        !            40:   0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
        !            41:   0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46,
        !            42: 
        !            43:   0x47, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
        !            44:   0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
        !            45:   0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
        !            46:   0xa3, 0xa5, 0xa8, 0xaa, 0xab, 0xac, 0xad, 0xae,
        !            47: 
        !            48:   0x54, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69,
        !            49:   0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f,
        !            50:   0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1,
        !            51:   0xa3, 0xa5, 0xa8, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,
        !            52: 
        !            53:   0x4c, 0x50, 0x5c, 0x62, 0x7d, 0x81, 0x9a, 0x55,
        !            54:   0x4a, 0x56, 0x4c, 0x4e, 0x50, 0x5c, 0x62, 0x64,
        !            55:   0x65, 0x66, 0x6f, 0x70, 0x71, 0x72, 0x7d, 0x89,
        !            56:   0x8a, 0x8b, 0x81, 0x83, 0x9c, 0x9d, 0x9e, 0x9a,
        !            57: 
        !            58:   0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0x95,
        !            59:   0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0x52, 0x85,
        !            60:   0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8,
        !            61:   0xc9, 0xca, 0xcb, 0x57, 0x8c, 0xcc, 0x52, 0x85,
        !            62: 
        !            63:   0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0x26,
        !            64:   0x27, 0xd4, 0x20, 0x4a, 0x4e, 0x83, 0x87, 0x87,
        !            65:   0xd5, 0xd6, 0x24, 0x25, 0x2d, 0x2e, 0xd7, 0xd8,
        !            66:   0xa7, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
        !            67: 
        !            68:   0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
        !            69:   0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
        !            70:   0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
        !            71:   0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
        !            72: };
        !            73: 
        !            74: /*
        !            75:  * NAME:       data->getsb()
        !            76:  * DESCRIPTION:        marshal 1 signed byte into local host format
        !            77:  */
        !            78: signed char d_getsb(register const unsigned char *ptr)
        !            79: {
        !            80:   return ptr[0];
        !            81: }
        !            82: 
        !            83: /*
        !            84:  * NAME:       data->getub()
        !            85:  * DESCRIPTION:        marshal 1 unsigned byte into local host format
        !            86:  */
        !            87: unsigned char d_getub(register const unsigned char *ptr)
        !            88: {
        !            89:   return ptr[0];
        !            90: }
        !            91: 
        !            92: /*
        !            93:  * NAME:       data->getsw()
        !            94:  * DESCRIPTION:        marshal 2 signed bytes into local host format
        !            95:  */
        !            96: signed short d_getsw(register const unsigned char *ptr)
        !            97: {
        !            98:   return
        !            99:     (((  signed short) ptr[0] << 8) |
        !           100:      ((unsigned short) ptr[1] << 0));
        !           101: }
        !           102: 
        !           103: /*
        !           104:  * NAME:       data->getuw()
        !           105:  * DESCRIPTION:        marshal 2 unsigned bytes into local host format
        !           106:  */
        !           107: unsigned short d_getuw(register const unsigned char *ptr)
        !           108: {
        !           109:   return
        !           110:     (((unsigned short) ptr[0] << 8) |
        !           111:      ((unsigned short) ptr[1] << 0));
        !           112: }
        !           113: 
        !           114: /*
        !           115:  * NAME:       data->getsl()
        !           116:  * DESCRIPTION:        marshal 4 signed bytes into local host format
        !           117:  */
        !           118: signed long d_getsl(register const unsigned char *ptr)
        !           119: {
        !           120:   return
        !           121:     (((  signed long) ptr[0] << 24) |
        !           122:      ((unsigned long) ptr[1] << 16) |
        !           123:      ((unsigned long) ptr[2] <<  8) |
        !           124:      ((unsigned long) ptr[3] <<  0));
        !           125: }
        !           126: 
        !           127: /*
        !           128:  * NAME:       data->getul()
        !           129:  * DESCRIPTION:        marshal 4 unsigned bytes into local host format
        !           130:  */
        !           131: unsigned long d_getul(register const unsigned char *ptr)
        !           132: {
        !           133:   return
        !           134:     (((unsigned long) ptr[0] << 24) |
        !           135:      ((unsigned long) ptr[1] << 16) |
        !           136:      ((unsigned long) ptr[2] <<  8) |
        !           137:      ((unsigned long) ptr[3] <<  0));
        !           138: }
        !           139: 
        !           140: /*
        !           141:  * NAME:       data->putsb()
        !           142:  * DESCRIPTION:        marshal 1 signed byte out in big-endian format
        !           143:  */
        !           144: void d_putsb(register unsigned char *ptr,
        !           145:             register signed char data)
        !           146: {
        !           147:   *ptr = data;
        !           148: }
        !           149: 
        !           150: /*
        !           151:  * NAME:       data->putub()
        !           152:  * DESCRIPTION:        marshal 1 unsigned byte out in big-endian format
        !           153:  */
        !           154: void d_putub(register unsigned char *ptr,
        !           155:             register unsigned char data)
        !           156: {
        !           157:   *ptr = data;
        !           158: }
        !           159: 
        !           160: /*
        !           161:  * NAME:       data->putsw()
        !           162:  * DESCRIPTION:        marshal 2 signed bytes out in big-endian format
        !           163:  */
        !           164: void d_putsw(register unsigned char *ptr,
        !           165:             register signed short data)
        !           166: {
        !           167:   *ptr++ = ((unsigned short) data & 0xff00) >> 8;
        !           168:   *ptr   = ((unsigned short) data & 0x00ff) >> 0;
        !           169: }
        !           170: 
        !           171: /*
        !           172:  * NAME:       data->putuw()
        !           173:  * DESCRIPTION:        marshal 2 unsigned bytes out in big-endian format
        !           174:  */
        !           175: void d_putuw(register unsigned char *ptr,
        !           176:             register unsigned short data)
        !           177: {
        !           178:   *ptr++ = (data & 0xff00) >> 8;
        !           179:   *ptr   = (data & 0x00ff) >> 0;
        !           180: }
        !           181: 
        !           182: /*
        !           183:  * NAME:       data->putsl()
        !           184:  * DESCRIPTION:        marshal 4 signed bytes out in big-endian format
        !           185:  */
        !           186: void d_putsl(register unsigned char *ptr,
        !           187:             register signed long data)
        !           188: {
        !           189:   *ptr++ = ((unsigned long) data & 0xff000000UL) >> 24;
        !           190:   *ptr++ = ((unsigned long) data & 0x00ff0000UL) >> 16;
        !           191:   *ptr++ = ((unsigned long) data & 0x0000ff00UL) >>  8;
        !           192:   *ptr   = ((unsigned long) data & 0x000000ffUL) >>  0;
        !           193: }
        !           194: 
        !           195: /*
        !           196:  * NAME:       data->putul()
        !           197:  * DESCRIPTION:        marshal 4 unsigned bytes out in big-endian format
        !           198:  */
        !           199: void d_putul(register unsigned char *ptr,
        !           200:             register unsigned long data)
        !           201: {
        !           202:   *ptr++ = (data & 0xff000000UL) >> 24;
        !           203:   *ptr++ = (data & 0x00ff0000UL) >> 16;
        !           204:   *ptr++ = (data & 0x0000ff00UL) >>  8;
        !           205:   *ptr   = (data & 0x000000ffUL) >>  0;
        !           206: }
        !           207: 
        !           208: /*
        !           209:  * NAME:       data->fetchsb()
        !           210:  * DESCRIPTION:        incrementally retrieve a signed byte of data
        !           211:  */
        !           212: void d_fetchsb(register const unsigned char **ptr,
        !           213:               register signed char *dest)
        !           214: {
        !           215:   *dest = *(*ptr)++;
        !           216: }
        !           217: 
        !           218: /*
        !           219:  * NAME:       data->fetchub()
        !           220:  * DESCRIPTION:        incrementally retrieve an unsigned byte of data
        !           221:  */
        !           222: void d_fetchub(register const unsigned char **ptr,
        !           223:               register unsigned char *dest)
        !           224: {
        !           225:   *dest = *(*ptr)++;
        !           226: }
        !           227: 
        !           228: /*
        !           229:  * NAME:       data->fetchsw()
        !           230:  * DESCRIPTION:        incrementally retrieve a signed word of data
        !           231:  */
        !           232: void d_fetchsw(register const unsigned char **ptr,
        !           233:               register signed short *dest)
        !           234: {
        !           235:   *dest =
        !           236:     (((  signed short) (*ptr)[0] << 8) |
        !           237:      ((unsigned short) (*ptr)[1] << 0));
        !           238:   *ptr += 2;
        !           239: }
        !           240: 
        !           241: /*
        !           242:  * NAME:       data->fetchuw()
        !           243:  * DESCRIPTION:        incrementally retrieve an unsigned word of data
        !           244:  */
        !           245: void d_fetchuw(register const unsigned char **ptr,
        !           246:               register unsigned short *dest)
        !           247: {
        !           248:   *dest =
        !           249:     (((unsigned short) (*ptr)[0] << 8) |
        !           250:      ((unsigned short) (*ptr)[1] << 0));
        !           251:   *ptr += 2;
        !           252: }
        !           253: 
        !           254: /*
        !           255:  * NAME:       data->fetchsl()
        !           256:  * DESCRIPTION:        incrementally retrieve a signed long word of data
        !           257:  */
        !           258: void d_fetchsl(register const unsigned char **ptr,
        !           259:               register signed long *dest)
        !           260: {
        !           261:   *dest =
        !           262:     (((  signed long) (*ptr)[0] << 24) |
        !           263:      ((unsigned long) (*ptr)[1] << 16) |
        !           264:      ((unsigned long) (*ptr)[2] <<  8) |
        !           265:      ((unsigned long) (*ptr)[3] <<  0));
        !           266:   *ptr += 4;
        !           267: }
        !           268: 
        !           269: /*
        !           270:  * NAME:       data->fetchul()
        !           271:  * DESCRIPTION:        incrementally retrieve an unsigned long word of data
        !           272:  */
        !           273: void d_fetchul(register const unsigned char **ptr,
        !           274:               register unsigned long *dest)
        !           275: {
        !           276:   *dest =
        !           277:     (((unsigned long) (*ptr)[0] << 24) |
        !           278:      ((unsigned long) (*ptr)[1] << 16) |
        !           279:      ((unsigned long) (*ptr)[2] <<  8) |
        !           280:      ((unsigned long) (*ptr)[3] <<  0));
        !           281:   *ptr += 4;
        !           282: }
        !           283: 
        !           284: /*
        !           285:  * NAME:       data->storesb()
        !           286:  * DESCRIPTION:        incrementally store a signed byte of data
        !           287:  */
        !           288: void d_storesb(register unsigned char **ptr,
        !           289:               register signed char data)
        !           290: {
        !           291:   *(*ptr)++ = data;
        !           292: }
        !           293: 
        !           294: /*
        !           295:  * NAME:       data->storeub()
        !           296:  * DESCRIPTION:        incrementally store an unsigned byte of data
        !           297:  */
        !           298: void d_storeub(register unsigned char **ptr,
        !           299:               register unsigned char data)
        !           300: {
        !           301:   *(*ptr)++ = data;
        !           302: }
        !           303: 
        !           304: /*
        !           305:  * NAME:       data->storesw()
        !           306:  * DESCRIPTION:        incrementally store a signed word of data
        !           307:  */
        !           308: void d_storesw(register unsigned char **ptr,
        !           309:               register signed short data)
        !           310: {
        !           311:   *(*ptr)++ = ((unsigned short) data & 0xff00) >> 8;
        !           312:   *(*ptr)++ = ((unsigned short) data & 0x00ff) >> 0;
        !           313: }
        !           314: 
        !           315: /*
        !           316:  * NAME:       data->storeuw()
        !           317:  * DESCRIPTION:        incrementally store an unsigned word of data
        !           318:  */
        !           319: void d_storeuw(register unsigned char **ptr,
        !           320:               register unsigned short data)
        !           321: {
        !           322:   *(*ptr)++ = (data & 0xff00) >> 8;
        !           323:   *(*ptr)++ = (data & 0x00ff) >> 0;
        !           324: }
        !           325: 
        !           326: /*
        !           327:  * NAME:       data->storesl()
        !           328:  * DESCRIPTION:        incrementally store a signed long word of data
        !           329:  */
        !           330: void d_storesl(register unsigned char **ptr,
        !           331:               register signed long data)
        !           332: {
        !           333:   *(*ptr)++ = ((unsigned long) data & 0xff000000UL) >> 24;
        !           334:   *(*ptr)++ = ((unsigned long) data & 0x00ff0000UL) >> 16;
        !           335:   *(*ptr)++ = ((unsigned long) data & 0x0000ff00UL) >>  8;
        !           336:   *(*ptr)++ = ((unsigned long) data & 0x000000ffUL) >>  0;
        !           337: }
        !           338: 
        !           339: /*
        !           340:  * NAME:       data->storeul()
        !           341:  * DESCRIPTION:        incrementally store an unsigned long word of data
        !           342:  */
        !           343: void d_storeul(register unsigned char **ptr,
        !           344:               register unsigned long data)
        !           345: {
        !           346:   *(*ptr)++ = (data & 0xff000000UL) >> 24;
        !           347:   *(*ptr)++ = (data & 0x00ff0000UL) >> 16;
        !           348:   *(*ptr)++ = (data & 0x0000ff00UL) >>  8;
        !           349:   *(*ptr)++ = (data & 0x000000ffUL) >>  0;
        !           350: }
        !           351: 
        !           352: /*
        !           353:  * NAME:       data->fetchstr()
        !           354:  * DESCRIPTION:        incrementally retrieve a string
        !           355:  */
        !           356: void d_fetchstr(const unsigned char **ptr, char *dest, unsigned size)
        !           357: {
        !           358:   unsigned len;
        !           359: 
        !           360:   len = d_getub(*ptr);
        !           361: 
        !           362:   if (len > 0 && len < size)
        !           363:     memcpy(dest, *ptr + 1, len);
        !           364:   else
        !           365:     len = 0;
        !           366: 
        !           367:   dest[len] = 0;
        !           368: 
        !           369:   *ptr += size;
        !           370: }
        !           371: 
        !           372: /*
        !           373:  * NAME:       data->storestr()
        !           374:  * DESCRIPTION:        incrementally store a string
        !           375:  */
        !           376: void d_storestr(unsigned char **ptr, const char *src, unsigned size)
        !           377: {
        !           378:   unsigned len;
        !           379: 
        !           380:   len = strlen(src);
        !           381:   if (len > --size)
        !           382:     len = 0;
        !           383: 
        !           384:   d_storeub(ptr, len);
        !           385: 
        !           386:   memcpy(*ptr, src, len);
        !           387:   memset(*ptr + len, 0, size - len);
        !           388: 
        !           389:   *ptr += size;
        !           390: }
        !           391: 
        !           392: /*
        !           393:  * NAME:       data->relstring()
        !           394:  * DESCRIPTION:        compare two strings as per MacOS for HFS
        !           395:  */
        !           396: int d_relstring(const char *str1, const char *str2)
        !           397: {
        !           398:   register int diff;
        !           399: 
        !           400:   while (*str1 && *str2)
        !           401:     {
        !           402:       diff = hfs_charorder[(unsigned char) *str1] -
        !           403:             hfs_charorder[(unsigned char) *str2];
        !           404: 
        !           405:       if (diff)
        !           406:        return diff;
        !           407: 
        !           408:       ++str1, ++str2;
        !           409:     }
        !           410: 
        !           411:   if (! *str1 && *str2)
        !           412:     return -1;
        !           413:   else if (*str1 && ! *str2)
        !           414:     return 1;
        !           415: 
        !           416:   return 0;
        !           417: }
        !           418: 
        !           419: /*
        !           420:  * NAME:       calctzdiff()
        !           421:  * DESCRIPTION:        calculate the timezone difference between local time and UTC
        !           422:  */
        !           423: static
        !           424: void calctzdiff(void)
        !           425: {
        !           426: # ifdef HAVE_MKTIME
        !           427: 
        !           428:   time_t t;
        !           429:   int isdst;
        !           430:   struct tm tm;
        !           431:   const struct tm *tmp;
        !           432: 
        !           433:   time(&t);
        !           434:   isdst = localtime(&t)->tm_isdst;
        !           435: 
        !           436:   tmp = gmtime(&t);
        !           437:   if (tmp)
        !           438:     {
        !           439:       tm = *tmp;
        !           440:       tm.tm_isdst = isdst;
        !           441: 
        !           442:       tzdiff = t - mktime(&tm);
        !           443:     }
        !           444:   else
        !           445:     tzdiff = 0;
        !           446: 
        !           447: # else
        !           448: 
        !           449:   tzdiff = 0;
        !           450: 
        !           451: # endif
        !           452: }
        !           453: 
        !           454: /*
        !           455:  * NAME:       data->ltime()
        !           456:  * DESCRIPTION:        convert MacOS time to local time
        !           457:  */
        !           458: time_t d_ltime(unsigned long mtime)
        !           459: {
        !           460:   if (tzdiff == -1)
        !           461:     calctzdiff();
        !           462: 
        !           463:   return (time_t) (mtime - TIMEDIFF) - tzdiff;
        !           464: }
        !           465: 
        !           466: /*
        !           467:  * NAME:       data->mtime()
        !           468:  * DESCRIPTION:        convert local time to MacOS time
        !           469:  */
        !           470: unsigned long d_mtime(time_t ltime)
        !           471: {
        !           472:   if (tzdiff == -1)
        !           473:     calctzdiff();
        !           474: 
        !           475:   return (unsigned long) (ltime + tzdiff) + TIMEDIFF;
        !           476: }

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