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iso9660_get_{l,d}time() anot accounting for the timezone properly.

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Some other small bugs removed.
This commit is contained in:
rocky
2006-03-17 01:05:54 +00:00
parent 3796126792
commit a418cf06ba
3 changed files with 112 additions and 32 deletions
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54
lib/iso9660/iso9660.c
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@@ -1,5 +1,5 @@
/*
$Id: iso9660.c,v 1.20 2006/03/06 19:39:35 rocky Exp $
$Id: iso9660.c,v 1.21 2006/03/17 01:05:54 rocky Exp $
Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
Copyright (C) 2003, 2004, 2005, 2006 Rocky Bernstein <rocky@panix.com>
@@ -43,6 +43,9 @@ const char ISO_STANDARD_ID[] = {'C', 'D', '0', '0', '1'};
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
@@ -51,7 +54,7 @@ const char ISO_STANDARD_ID[] = {'C', 'D', '0', '0', '1'};
#include <errno.h>
#endif
static const char _rcsid[] = "$Id: iso9660.c,v 1.20 2006/03/06 19:39:35 rocky Exp $";
static const char _rcsid[] = "$Id: iso9660.c,v 1.21 2006/03/17 01:05:54 rocky Exp $";
/* Variables to hold debugger-helping enumerations */
enum iso_enum1_s iso_enums1;
@@ -136,32 +139,16 @@ iso9660_get_dtime (const iso9660_dtime_t *idr_date, bool b_localtime,
p_tm->tm_mday = idr_date->dt_day;
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_sec = idr_date->dt_second - idr_date->dt_gmtoff * (15 * 60);
p_tm->tm_isdst = -1; /* information not available */
/* Recompute tm_wday and tm_yday via mktime. mktime will also renormalize
date values to account for the timezone offset. */
{
time_t t = 0;
struct tm *p_temp_tm = b_localtime ? localtime(&t): gmtime(&t);
/* Recompute tm_wday and tm_yday via mktime. Also adjust for
time-zone differences */
t = mktime(p_tm);
t -= idr_date->dt_gmtoff * (15 * 60);
#ifdef HAVE_TM_GMTOFF
t += p_temp_tm->tm_gmtoff;
#else
{
static bool i_first_time = true;
static time_t gmt_off;
if (i_first_time) {
struct tm tm_local, tm_gmt;
memcpy(&tm_local, localtime(&t), sizeof(struct tm));
memcpy(&tm_gmt , gmtime(&t) , sizeof(struct tm));
gmt_off = mktime(&tm_local) - mktime(&tm_gmt);
i_first_time = false;
}
t += gmt_off;
}
#endif
p_temp_tm = b_localtime ? localtime(&t) : gmtime(&t);
@@ -179,7 +166,10 @@ iso9660_get_dtime (const iso9660_dtime_t *idr_date, bool b_localtime,
#define set_ltime_field(TM_FIELD, LT_FIELD, ADD_CONSTANT) \
{ \
p_tm->TM_FIELD = strtol(p_ldate->LT_FIELD, \
char num[10]; \
memcpy(num, p_ldate->LT_FIELD, sizeof(p_ldate->LT_FIELD)); \
num[sizeof(p_ldate->LT_FIELD)+1] = '\0'; \
p_tm->TM_FIELD = strtol(num, \
(char **)NULL, 10)+ADD_CONSTANT; \
if (0 != errno) return false; \
}
@@ -194,24 +184,30 @@ iso9660_get_ltime (const iso9660_ltime_t *p_ldate,
{
if (!p_tm) return false;
memset(p_tm, 0, sizeof(struct tm));
set_ltime_field(tm_year, lt_year, 0);
set_ltime_field(tm_year, lt_year, -1900);
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 */
#ifdef HAVE_TM_GMTOFF
p_tm->tm_gmtoff = - p_ldate->lt_gmtoff * (15 * 60);
#endif
p_tm->tm_sec += p_ldate->lt_gmtoff * (15 * 60);
/* Recompute tm_wday and tm_yday via mktime. */
/* Recompute tm_wday and tm_yday via mktime. mktime will also renormalize
date values to account for the timezone offset. */
{
time_t t;
struct tm *p_temp_tm;
const char *old_tzname=getenv("TZ");
char psz_gmt_tzset[]="TZ=GMT";
putenv(psz_gmt_tzset);
t = mktime(p_tm);
p_temp_tm = gmtime(&t);
if (old_tzname) {
char psz_tzset[10];
snprintf(psz_tzset, sizeof(psz_tzset), "TZ=%s", old_tzname);
}
p_tm->tm_wday = p_temp_tm->tm_wday;
p_tm->tm_yday = p_temp_tm->tm_yday;