/*
* 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;
}