diff options
Diffstat (limited to 'libhfs_iso/data.c')
| -rw-r--r-- | libhfs_iso/data.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/libhfs_iso/data.c b/libhfs_iso/data.c new file mode 100644 index 0000000..3f503f4 --- /dev/null +++ b/libhfs_iso/data.c @@ -0,0 +1,379 @@ +/* + * 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 <mconfig.h> +#include <strdefs.h> +#include <timedefs.h> + +#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; +} |