--- /dev/null
+/*
+ * 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;
+}
Code Review / kvmfornfv.git / blobdiff