/* * This file has been modified for the cdrkit suite. * * The behaviour and appearence of the program code below can differ to a major * extent from the version distributed by the original author(s). * * For details, see Changelog file distributed with the cdrkit package. If you * received this file from another source then ask the distributing person for * a log of modifications. * */ /* @(#)data.c 1.5 02/02/10 joerg */ /* * hfsutils - tools for reading and writing Macintosh HFS volumes * Copyright (C) 1996, 1997 Robert Leslie * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include "internal.h" #include "data.h" #include "btree.h" #ifdef APPLE_HYB /* * Depending on the version, AppleDouble/Single stores dates * relative to 1st Jan 1904 (v1) or 1st Jan 2000 (v2) * * DUTDIFF is the difference between 1st Jan 2000 and * 1st Jan 1970 (Unix epoch)). */ #define DUTDIFF 946684800L #endif /* APPLE_HYB */ #define MUTDIFF 2082844800L #define TZNONE 0x0FFFFFFFL /* A timezone diff that cannot occur */ static void calctzdiff(void); static unsigned long tzdiff = TZNONE; static unsigned char hfs_charorder[256] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x22, 0x23, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69, 0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f, 0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1, 0xa3, 0xa5, 0xa8, 0xaa, 0xab, 0xac, 0xad, 0xae, 0x54, 0x48, 0x58, 0x5a, 0x5e, 0x60, 0x67, 0x69, 0x6b, 0x6d, 0x73, 0x75, 0x77, 0x79, 0x7b, 0x7f, 0x8d, 0x8f, 0x91, 0x93, 0x96, 0x98, 0x9f, 0xa1, 0xa3, 0xa5, 0xa8, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0x4c, 0x50, 0x5c, 0x62, 0x7d, 0x81, 0x9a, 0x55, 0x4a, 0x56, 0x4c, 0x4e, 0x50, 0x5c, 0x62, 0x64, 0x65, 0x66, 0x6f, 0x70, 0x71, 0x72, 0x7d, 0x89, 0x8a, 0x8b, 0x81, 0x83, 0x9c, 0x9d, 0x9e, 0x9a, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0x95, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0x52, 0x85, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0x57, 0x8c, 0xcc, 0x52, 0x85, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0x26, 0x27, 0xd4, 0x20, 0x4a, 0x4e, 0x83, 0x87, 0x87, 0xd5, 0xd6, 0x24, 0x25, 0x2d, 0x2e, 0xd7, 0xd8, 0xa7, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff }; /* * NAME: data->getb() * DESCRIPTION: marshal 1 byte into local host format */ char d_getb(unsigned char *ptr) { return (char) ptr[0]; } /* * NAME: data->getw() * DESCRIPTION: marshal 2 bytes into local host format */ short d_getw(unsigned char *ptr) { return (short) ((ptr[0] << 8) | (ptr[1] << 0)); } /* * NAME: data->getl() * DESCRIPTION: marshal 4 bytes into local host format */ long d_getl(unsigned char *ptr) { return (long) ((ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3] << 0)); } /* * NAME: data->putb() * DESCRIPTION: marshal 1 byte out to Macintosh (big-endian) format */ #ifdef PROTOTYPES void d_putb(unsigned char *ptr, char data) #else void d_putb(unsigned char *ptr, char data) #endif { ptr[0] = (unsigned char) data; } /* * NAME: data->putw() * DESCRIPTION: marshal 2 bytes out to Macintosh (big-endian) format */ #ifdef PROTOTYPES void d_putw(unsigned char *ptr, short data) #else void d_putw(unsigned char *ptr, short data) #endif { ptr[0] = ((unsigned) data & 0xff00) >> 8; ptr[1] = ((unsigned) data & 0x00ff) >> 0; } /* * NAME: data->putl() * DESCRIPTION: marshal 4 bytes out to Macintosh (big-endian) format */ void d_putl(unsigned char *ptr, long data) { ptr[0] = ((unsigned long) data & 0xff000000) >> 24; ptr[1] = ((unsigned long) data & 0x00ff0000) >> 16; ptr[2] = ((unsigned long) data & 0x0000ff00) >> 8; ptr[3] = ((unsigned long) data & 0x000000ff) >> 0; } /* * NAME: data->fetchb() * DESCRIPTION: incrementally retrieve a byte of data */ void d_fetchb(unsigned char **ptr, char *dest) { *dest = d_getb(*ptr); *ptr += 1; } /* * NAME: data->fetchw() * DESCRIPTION: incrementally retrieve a word of data */ void d_fetchw(unsigned char **ptr, short *dest) { *dest = d_getw(*ptr); *ptr += 2; } /* * NAME: data->fetchl() * DESCRIPTION: incrementally retrieve a long word of data */ void d_fetchl(unsigned char **ptr, long *dest) { *dest = d_getl(*ptr); *ptr += 4; } /* * NAME: data->fetchs() * DESCRIPTION: incrementally retrieve a string */ void d_fetchs(unsigned char **ptr, char *dest, int size) { int len; char blen; d_fetchb(ptr, &blen); len = blen; if (len > 0 && len < size) memcpy(dest, *ptr, len); else len = 0; dest[len] = 0; *ptr += size - 1; } /* * NAME: data->storeb() * DESCRIPTION: incrementally store a byte of data */ #ifdef PROTOTYPES void d_storeb(unsigned char **ptr, char data) #else void d_storeb(unsigned char **ptr, char data) #endif { d_putb(*ptr, data); *ptr += 1; } /* * NAME: data->storew() * DESCRIPTION: incrementally store a word of data */ #ifdef PROTOTYPES void d_storew(unsigned char **ptr, short data) #else void d_storew(unsigned char **ptr, short data) #endif { d_putw(*ptr, data); *ptr += 2; } /* * NAME: data->storel() * DESCRIPTION: incrementally store a long word of data */ void d_storel(unsigned char **ptr, long data) { d_putl(*ptr, data); *ptr += 4; } /* * NAME: data->stores() * DESCRIPTION: incrementally store a string */ void d_stores(unsigned char **ptr, char *src, int size) { int len; len = strlen(src); if (len > --size) len = 0; d_storeb(ptr, (unsigned char) len); memcpy(*ptr, src, len); memset(*ptr + len, 0, size - len); *ptr += size; } /* * NAME: calctzdiff() * DESCRIPTION: calculate the timezone difference between local time and UTC */ static void calctzdiff() { time_t t; int isdst; struct tm tm, *tmp; time(&t); isdst = localtime(&t)->tm_isdst; tmp = gmtime(&t); if (tmp) { tm = *tmp; tm.tm_isdst = isdst; tzdiff = t - mktime(&tm); } else tzdiff = 0; } /* * NAME: data->tomtime() * DESCRIPTION: convert UNIX time to Macintosh time */ unsigned long d_tomtime(unsigned long secs) { time_t utime = secs; if (tzdiff == TZNONE) calctzdiff(); return utime + tzdiff + MUTDIFF; } /* * NAME: data->toutime() * DESCRIPTION: convert Macintosh time to UNIX time */ unsigned long d_toutime(unsigned long secs) { time_t utime = secs; if (tzdiff == TZNONE) calctzdiff(); return utime - MUTDIFF - tzdiff; } #ifdef APPLE_HYB /* * NAME: data->dtoutime() * DESCRIPTION: convert Apple Double v2 time to UNIX time */ unsigned long d_dtoutime(long secs) { time_t utime = secs; if (tzdiff == TZNONE) calctzdiff(); return utime + DUTDIFF - tzdiff; } #endif /* APPLE_HYB */ /* * NAME: data->relstring() * DESCRIPTION: compare two strings as per MacOS for HFS */ int d_relstring(char *str1, char *str2) { int diff; while (*str1 && *str2) { diff = hfs_charorder[(unsigned char) *str1] - hfs_charorder[(unsigned char) *str2]; if (diff) return diff; ++str1, ++str2; } if (! *str1 && *str2) return -1; else if (*str1 && ! *str2) return 1; return 0; }