| /* |
| * libhfs - library for reading and writing Macintosh HFS volumes |
| * Copyright (C) 1996-1998 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., 51 Franklin Street - Fifth Floor, Boston, |
| * MA 02110-1301, USA. |
| * |
| * $Id: data.c,v 1.7 1998/11/02 22:08:57 rob Exp $ |
| */ |
| |
| #include "config.h" |
| #include "data.h" |
| |
| #define TIMEDIFF 2082844800UL |
| |
| static |
| time_t tzdiff = -1; |
| |
| static const |
| 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->getsb() |
| * DESCRIPTION: marshal 1 signed byte into local host format |
| */ |
| signed char d_getsb(register const unsigned char *ptr) |
| { |
| return ptr[0]; |
| } |
| |
| /* |
| * NAME: data->getub() |
| * DESCRIPTION: marshal 1 unsigned byte into local host format |
| */ |
| unsigned char d_getub(register const unsigned char *ptr) |
| { |
| return ptr[0]; |
| } |
| |
| /* |
| * NAME: data->getsw() |
| * DESCRIPTION: marshal 2 signed bytes into local host format |
| */ |
| signed short d_getsw(register const unsigned char *ptr) |
| { |
| return |
| ((( signed short) ptr[0] << 8) | |
| ((unsigned short) ptr[1] << 0)); |
| } |
| |
| /* |
| * NAME: data->getuw() |
| * DESCRIPTION: marshal 2 unsigned bytes into local host format |
| */ |
| unsigned short d_getuw(register const unsigned char *ptr) |
| { |
| return |
| (((unsigned short) ptr[0] << 8) | |
| ((unsigned short) ptr[1] << 0)); |
| } |
| |
| /* |
| * NAME: data->getsl() |
| * DESCRIPTION: marshal 4 signed bytes into local host format |
| */ |
| signed long d_getsl(register const unsigned char *ptr) |
| { |
| return |
| ((( signed long) ptr[0] << 24) | |
| ((unsigned long) ptr[1] << 16) | |
| ((unsigned long) ptr[2] << 8) | |
| ((unsigned long) ptr[3] << 0)); |
| } |
| |
| /* |
| * NAME: data->getul() |
| * DESCRIPTION: marshal 4 unsigned bytes into local host format |
| */ |
| unsigned long d_getul(register const unsigned char *ptr) |
| { |
| return |
| (((unsigned long) ptr[0] << 24) | |
| ((unsigned long) ptr[1] << 16) | |
| ((unsigned long) ptr[2] << 8) | |
| ((unsigned long) ptr[3] << 0)); |
| } |
| |
| /* |
| * NAME: data->putsb() |
| * DESCRIPTION: marshal 1 signed byte out in big-endian format |
| */ |
| void d_putsb(register unsigned char *ptr, |
| register signed char data) |
| { |
| *ptr = data; |
| } |
| |
| /* |
| * NAME: data->putub() |
| * DESCRIPTION: marshal 1 unsigned byte out in big-endian format |
| */ |
| void d_putub(register unsigned char *ptr, |
| register unsigned char data) |
| { |
| *ptr = data; |
| } |
| |
| /* |
| * NAME: data->putsw() |
| * DESCRIPTION: marshal 2 signed bytes out in big-endian format |
| */ |
| void d_putsw(register unsigned char *ptr, |
| register signed short data) |
| { |
| *ptr++ = ((unsigned short) data & 0xff00) >> 8; |
| *ptr = ((unsigned short) data & 0x00ff) >> 0; |
| } |
| |
| /* |
| * NAME: data->putuw() |
| * DESCRIPTION: marshal 2 unsigned bytes out in big-endian format |
| */ |
| void d_putuw(register unsigned char *ptr, |
| register unsigned short data) |
| { |
| *ptr++ = (data & 0xff00) >> 8; |
| *ptr = (data & 0x00ff) >> 0; |
| } |
| |
| /* |
| * NAME: data->putsl() |
| * DESCRIPTION: marshal 4 signed bytes out in big-endian format |
| */ |
| void d_putsl(register unsigned char *ptr, |
| register signed long data) |
| { |
| *ptr++ = ((unsigned long) data & 0xff000000UL) >> 24; |
| *ptr++ = ((unsigned long) data & 0x00ff0000UL) >> 16; |
| *ptr++ = ((unsigned long) data & 0x0000ff00UL) >> 8; |
| *ptr = ((unsigned long) data & 0x000000ffUL) >> 0; |
| } |
| |
| /* |
| * NAME: data->putul() |
| * DESCRIPTION: marshal 4 unsigned bytes out in big-endian format |
| */ |
| void d_putul(register unsigned char *ptr, |
| register unsigned long data) |
| { |
| *ptr++ = (data & 0xff000000UL) >> 24; |
| *ptr++ = (data & 0x00ff0000UL) >> 16; |
| *ptr++ = (data & 0x0000ff00UL) >> 8; |
| *ptr = (data & 0x000000ffUL) >> 0; |
| } |
| |
| /* |
| * NAME: data->fetchsb() |
| * DESCRIPTION: incrementally retrieve a signed byte of data |
| */ |
| void d_fetchsb(register const unsigned char **ptr, |
| register signed char *dest) |
| { |
| *dest = *(*ptr)++; |
| } |
| |
| /* |
| * NAME: data->fetchub() |
| * DESCRIPTION: incrementally retrieve an unsigned byte of data |
| */ |
| void d_fetchub(register const unsigned char **ptr, |
| register unsigned char *dest) |
| { |
| *dest = *(*ptr)++; |
| } |
| |
| /* |
| * NAME: data->fetchsw() |
| * DESCRIPTION: incrementally retrieve a signed word of data |
| */ |
| void d_fetchsw(register const unsigned char **ptr, |
| register signed short *dest) |
| { |
| *dest = |
| ((( signed short) (*ptr)[0] << 8) | |
| ((unsigned short) (*ptr)[1] << 0)); |
| *ptr += 2; |
| } |
| |
| /* |
| * NAME: data->fetchuw() |
| * DESCRIPTION: incrementally retrieve an unsigned word of data |
| */ |
| void d_fetchuw(register const unsigned char **ptr, |
| register unsigned short *dest) |
| { |
| *dest = |
| (((unsigned short) (*ptr)[0] << 8) | |
| ((unsigned short) (*ptr)[1] << 0)); |
| *ptr += 2; |
| } |
| |
| /* |
| * NAME: data->fetchsl() |
| * DESCRIPTION: incrementally retrieve a signed long word of data |
| */ |
| void d_fetchsl(register const unsigned char **ptr, |
| register signed long *dest) |
| { |
| *dest = |
| ((( signed long) (*ptr)[0] << 24) | |
| ((unsigned long) (*ptr)[1] << 16) | |
| ((unsigned long) (*ptr)[2] << 8) | |
| ((unsigned long) (*ptr)[3] << 0)); |
| *ptr += 4; |
| } |
| |
| /* |
| * NAME: data->fetchul() |
| * DESCRIPTION: incrementally retrieve an unsigned long word of data |
| */ |
| void d_fetchul(register const unsigned char **ptr, |
| register unsigned long *dest) |
| { |
| *dest = |
| (((unsigned long) (*ptr)[0] << 24) | |
| ((unsigned long) (*ptr)[1] << 16) | |
| ((unsigned long) (*ptr)[2] << 8) | |
| ((unsigned long) (*ptr)[3] << 0)); |
| *ptr += 4; |
| } |
| |
| /* |
| * NAME: data->storesb() |
| * DESCRIPTION: incrementally store a signed byte of data |
| */ |
| void d_storesb(register unsigned char **ptr, |
| register signed char data) |
| { |
| *(*ptr)++ = data; |
| } |
| |
| /* |
| * NAME: data->storeub() |
| * DESCRIPTION: incrementally store an unsigned byte of data |
| */ |
| void d_storeub(register unsigned char **ptr, |
| register unsigned char data) |
| { |
| *(*ptr)++ = data; |
| } |
| |
| /* |
| * NAME: data->storesw() |
| * DESCRIPTION: incrementally store a signed word of data |
| */ |
| void d_storesw(register unsigned char **ptr, |
| register signed short data) |
| { |
| *(*ptr)++ = ((unsigned short) data & 0xff00) >> 8; |
| *(*ptr)++ = ((unsigned short) data & 0x00ff) >> 0; |
| } |
| |
| /* |
| * NAME: data->storeuw() |
| * DESCRIPTION: incrementally store an unsigned word of data |
| */ |
| void d_storeuw(register unsigned char **ptr, |
| register unsigned short data) |
| { |
| *(*ptr)++ = (data & 0xff00) >> 8; |
| *(*ptr)++ = (data & 0x00ff) >> 0; |
| } |
| |
| /* |
| * NAME: data->storesl() |
| * DESCRIPTION: incrementally store a signed long word of data |
| */ |
| void d_storesl(register unsigned char **ptr, |
| register signed long data) |
| { |
| *(*ptr)++ = ((unsigned long) data & 0xff000000UL) >> 24; |
| *(*ptr)++ = ((unsigned long) data & 0x00ff0000UL) >> 16; |
| *(*ptr)++ = ((unsigned long) data & 0x0000ff00UL) >> 8; |
| *(*ptr)++ = ((unsigned long) data & 0x000000ffUL) >> 0; |
| } |
| |
| /* |
| * NAME: data->storeul() |
| * DESCRIPTION: incrementally store an unsigned long word of data |
| */ |
| void d_storeul(register unsigned char **ptr, |
| register unsigned long data) |
| { |
| *(*ptr)++ = (data & 0xff000000UL) >> 24; |
| *(*ptr)++ = (data & 0x00ff0000UL) >> 16; |
| *(*ptr)++ = (data & 0x0000ff00UL) >> 8; |
| *(*ptr)++ = (data & 0x000000ffUL) >> 0; |
| } |
| |
| /* |
| * NAME: data->fetchstr() |
| * DESCRIPTION: incrementally retrieve a string |
| */ |
| void d_fetchstr(const unsigned char **ptr, char *dest, unsigned size) |
| { |
| unsigned len; |
| |
| len = d_getub(*ptr); |
| |
| if (len > 0 && len < size) |
| memcpy(dest, *ptr + 1, len); |
| else |
| len = 0; |
| |
| dest[len] = 0; |
| |
| *ptr += size; |
| } |
| |
| /* |
| * NAME: data->storestr() |
| * DESCRIPTION: incrementally store a string |
| */ |
| void d_storestr(unsigned char **ptr, const char *src, unsigned size) |
| { |
| unsigned len; |
| |
| len = strlen(src); |
| if (len > --size) |
| len = 0; |
| |
| d_storeub(ptr, len); |
| |
| memcpy(*ptr, src, len); |
| memset(*ptr + len, 0, size - len); |
| |
| *ptr += size; |
| } |
| |
| /* |
| * NAME: data->relstring() |
| * DESCRIPTION: compare two strings as per MacOS for HFS |
| */ |
| int d_relstring(const char *str1, const char *str2) |
| { |
| register 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; |
| } |
| |
| /* |
| * NAME: calctzdiff() |
| * DESCRIPTION: calculate the timezone difference between local time and UTC |
| */ |
| static |
| void calctzdiff(void) |
| { |
| # ifdef HAVE_MKTIME |
| |
| time_t t; |
| int isdst; |
| struct tm tm; |
| const struct 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; |
| |
| # else |
| |
| tzdiff = 0; |
| |
| # endif |
| } |
| |
| /* |
| * NAME: data->ltime() |
| * DESCRIPTION: convert MacOS time to local time |
| */ |
| time_t d_ltime(unsigned long mtime) |
| { |
| if (tzdiff == -1) |
| calctzdiff(); |
| |
| return (time_t) (mtime - TIMEDIFF) - tzdiff; |
| } |
| |
| /* |
| * NAME: data->mtime() |
| * DESCRIPTION: convert local time to MacOS time |
| */ |
| unsigned long d_mtime(time_t ltime) |
| { |
| if (tzdiff == -1) |
| calctzdiff(); |
| |
| return (unsigned long) (ltime + tzdiff) + TIMEDIFF; |
| } |