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Add routine for extracing ISO 9660 long time format and probably correct

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the short-time format a little.

Handle Rock-Ridge time and be able to display it.
This pretty much completes the bulk of handling Rock-Ridge extensions.
This commit is contained in:
rocky
2005-02-22 02:02:46 +00:00
parent ec0564dfee
commit a2fccc90c4
5 changed files with 183 additions and 105 deletions
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89
lib/iso9660/iso9660.c
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@@ -1,5 +1,5 @@
/*
$Id: iso9660.c,v 1.5 2005/02/20 17:47:01 rocky Exp $
$Id: iso9660.c,v 1.6 2005/02/22 02:02:46 rocky Exp $
Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
Copyright (C) 2003, 2004, 2005 Rocky Bernstein <rocky@panix.com>
@@ -44,7 +44,11 @@ const char ISO_STANDARD_ID[] = {'C', 'D', '0', '0', '1'};
#include <stdio.h>
#endif
static const char _rcsid[] = "$Id: iso9660.c,v 1.5 2005/02/20 17:47:01 rocky Exp $";
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
static const char _rcsid[] = "$Id: iso9660.c,v 1.6 2005/02/22 02:02:46 rocky Exp $";
/* Variables to hold debugger-helping enumerations */
enum iso_enums1 iso_enums1;
@@ -93,14 +97,11 @@ pathtable_get_size_and_entries(const void *pt, unsigned int *size,
If tm is to reflect the localtime set b_localtime true, otherwise
tm will reported in GMT.
*/
void
bool
iso9660_get_dtime (const iso9660_dtime_t *idr_date, bool b_localtime,
/*out*/ struct tm *p_tm)
{
time_t t;
struct tm *p_temp_tm;
if (!idr_date) return;
if (!idr_date) return false;
memset(p_tm, 0, sizeof(struct tm));
p_tm->tm_year = idr_date->dt_year;
@@ -109,31 +110,69 @@ iso9660_get_dtime (const iso9660_dtime_t *idr_date, bool b_localtime,
p_tm->tm_hour = idr_date->dt_hour;
p_tm->tm_min = idr_date->dt_minute;
p_tm->tm_sec = idr_date->dt_second;
p_tm->tm_gmtoff = - timezone * 15;
p_tm->tm_isdst = -1; /* information not available */
#if defined(HAVE_TM_GMTOFF) && defined(HAVE_TZSET)
if (b_localtime) {
tzset();
#if defined(HAVE_TZNAME)
p_tm->tm_zone = (char *) tzname;
#endif
#if defined(HAVE_DAYLIGHT)
p_tm->tm_isdst = daylight;
p_tm->tm_gmtoff = timezone;
#endif
{
time_t t;
struct tm *p_temp_tm;
/* Recompute tm_wday and tm_yday via mktime. */
t = mktime(p_tm);
if (b_localtime)
p_temp_tm = localtime(&t);
else
p_temp_tm = gmtime(&t);
memcpy(p_tm, p_temp_tm, sizeof(struct tm));
}
#endif
return true;
}
#define set_ltime_field(TM_FIELD, LT_FIELD, ADD_CONSTANT) \
{ \
p_tm->TM_FIELD = strtol(p_ldate->LT_FIELD, \
(char **)NULL, 10)+ADD_CONSTANT; \
if (0 != errno) return false; \
}
/*!
Get "long" time in format used in ISO 9660 primary volume descriptor
from a Unix time structure.
*/
bool
iso9660_get_ltime (const iso9660_ltime_t *p_ldate,
/*out*/ struct tm *p_tm)
{
if (!p_tm) return false;
memset(p_tm, 0, sizeof(struct tm));
set_ltime_field(tm_year, lt_year, 0);
set_ltime_field(tm_mon, lt_month, -1);
set_ltime_field(tm_mday, lt_day, 0);
set_ltime_field(tm_hour, lt_hour, 0);
set_ltime_field(tm_min, lt_minute, 0);
set_ltime_field(tm_sec, lt_second, 0);
p_tm->tm_isdst= -1; /* information not available */
p_tm->tm_gmtoff = - timezone * 15;
/* Recompute tm_wday and tm_yday via mktime. */
t = mktime(p_tm);
if (b_localtime)
p_temp_tm = localtime(&t);
else
{
time_t t;
struct tm *p_temp_tm;
t = mktime(p_tm);
p_temp_tm = gmtime(&t);
memcpy(p_tm, p_temp_tm, sizeof(struct tm));
p_tm->tm_wday = p_temp_tm->tm_wday;
p_tm->tm_yday = p_temp_tm->tm_yday;
}
return true;
}
/*!
Set time in format used in ISO 9660 directory index record
from a Unix time structure. */