+/*
+ * timestamp.h
+ *
+ * Conversion between Windows NT timestamps and UNIX timestamps.
+ */
+
#ifndef _WIMLIB_TIMESTAMP_H
#define _WIMLIB_TIMESTAMP_H
-#include "wimlib/types.h"
-#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
-#define intervals_per_second (1000000000ULL / 100ULL)
-#define intervals_per_microsecond (10)
-#define nanoseconds_per_interval (100)
-#define days_per_year (365ULL)
-#define seconds_per_day (3600ULL * 24ULL)
-#define intervals_per_day (seconds_per_day * intervals_per_second)
-#define intervals_per_year (intervals_per_day * days_per_year)
-#define years_1601_to_1970 (1970ULL - 1601ULL)
-#define leap_years_1601_to_1970 (years_1601_to_1970 / 4ULL - 3ULL)
-#define intervals_1601_to_1970 (years_1601_to_1970 * intervals_per_year \
- + leap_years_1601_to_1970 * intervals_per_day)
+#include "wimlib/types.h"
-static inline u64
-unix_timestamp_to_wim(time_t t)
-{
- return (u64)intervals_1601_to_1970 + t * intervals_per_second;
-}
+extern time_t
+wim_timestamp_to_time_t(u64 timestamp);
-/* Converts a timestamp as used in the WIM file to a UNIX timestamp as used in
- * the time() function. */
-static inline time_t
-wim_timestamp_to_unix(u64 timestamp)
-{
- return (timestamp - intervals_1601_to_1970) / intervals_per_second;
-}
+extern struct timeval
+wim_timestamp_to_timeval(u64 timestamp);
-static inline u64
-timeval_to_wim_timestamp(const struct timeval tv)
-{
- return intervals_1601_to_1970
- + (u64)tv.tv_sec * intervals_per_second
- + (u64)tv.tv_usec * intervals_per_microsecond;
-}
+extern struct timespec
+wim_timestamp_to_timespec(u64 timestamp);
-static inline struct timeval
-wim_timestamp_to_timeval(u64 timestamp)
-{
- struct timeval tv;
- tv.tv_sec = (timestamp - intervals_1601_to_1970) / intervals_per_second;
- tv.tv_usec = ((timestamp - intervals_1601_to_1970) /
- intervals_per_microsecond) % 1000000;
- return tv;
-}
+extern u64
+time_t_to_wim_timestamp(time_t t);
-static inline u64
-timespec_to_wim_timestamp(const struct timespec ts)
-{
- return intervals_1601_to_1970
- + (u64)ts.tv_sec * intervals_per_second
- + (u64)ts.tv_nsec / nanoseconds_per_interval;
-}
+extern u64
+timeval_to_wim_timestamp(const struct timeval *tv);
-static inline struct timespec
-wim_timestamp_to_timespec(u64 timestamp)
-{
- struct timespec ts;
- ts.tv_sec = (timestamp - intervals_1601_to_1970) / intervals_per_second;
- ts.tv_nsec = ((timestamp - intervals_1601_to_1970) % intervals_per_second) *
- nanoseconds_per_interval;
- return ts;
-}
+extern u64
+timespec_to_wim_timestamp(const struct timespec *ts);
extern u64
-get_wim_timestamp(void);
+now_as_wim_timestamp(void);
extern void
wim_timestamp_to_str(u64 timestamp, tchar *buf, size_t len);
-#endif
+#endif /* _WIMLIB_TIMESTAMP_H */
{
struct wim_inode *inode = new_timeless_inode();
if (inode) {
- u64 now = get_wim_timestamp();
+ u64 now = now_as_wim_timestamp();
inode->i_creation_time = now;
inode->i_last_access_time = now;
inode->i_last_write_time = now;
stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
stbuf->st_ctim = stbuf->st_mtim;
#else
- stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
- stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
+ stbuf->st_atime = wim_timestamp_to_time_t(inode->i_last_access_time);
+ stbuf->st_mtime = wim_timestamp_to_time_t(inode->i_last_write_time);
stbuf->st_ctime = stbuf->st_mtime;
#endif
stbuf->st_blocks = DIV_ROUND_UP(stbuf->st_size, 512);
static void
touch_inode(struct wim_inode *inode)
{
- u64 now = get_wim_timestamp();
+ u64 now = now_as_wim_timestamp();
inode->i_last_access_time = now;
inode->i_last_write_time = now;
}
if (tv[0].tv_nsec != UTIME_OMIT) {
if (tv[0].tv_nsec == UTIME_NOW)
- inode->i_last_access_time = get_wim_timestamp();
+ inode->i_last_access_time = now_as_wim_timestamp();
else
- inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
+ inode->i_last_access_time = timespec_to_wim_timestamp(&tv[0]);
}
if (tv[1].tv_nsec != UTIME_OMIT) {
if (tv[1].tv_nsec == UTIME_NOW)
- inode->i_last_write_time = get_wim_timestamp();
+ inode->i_last_write_time = now_as_wim_timestamp();
else
- inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
+ inode->i_last_write_time = timespec_to_wim_timestamp(&tv[1]);
}
return 0;
}
if (!inode)
return -errno;
- inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
- inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
+ inode->i_last_access_time = time_t_to_wim_timestamp(times->actime);
+ inode->i_last_write_time = time_t_to_wim_timestamp(times->modtime);
return 0;
}
#endif /* !HAVE_UTIMENSAT */
/*
* timestamp.c
+ *
+ * Conversion between Windows NT timestamps and UNIX timestamps.
*/
/*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Copyright (C) 2012, 2013, 2014 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
# include "config.h"
#endif
-#include "wimlib/types.h"
#include "wimlib/timestamp.h"
-#include <time.h>
-#include <sys/time.h>
+/*
+ * Timestamps in WIM files are Windows NT timestamps, or FILETIMEs: 64-bit
+ * values storing the number of 100-nanosecond ticks since January 1, 1601.
+ */
+
+#define NANOSECONDS_PER_TICK 100
+#define TICKS_PER_SECOND (1000000000 / NANOSECONDS_PER_TICK)
+#define TICKS_PER_MICROSECOND (TICKS_PER_SECOND / 1000000)
+
+/*
+ * EPOCH_DISTANCE is the number of 100-nanosecond ticks separating the
+ * Windows NT and UNIX epochs. This is equal to ((1970-1601)*365+89)*
+ * 24*60*60*10000000. 89 is the number of leap years between 1970 and 1601.
+ */
+#define EPOCH_DISTANCE 116444736000000000
+
+#define TO_WINNT_EPOCH(timestamp) ((timestamp) + EPOCH_DISTANCE)
+#define TO_UNIX_EPOCH(timestamp) ((timestamp) - EPOCH_DISTANCE)
+
+/* Windows NT timestamps to UNIX timestamps */
+
+time_t
+wim_timestamp_to_time_t(u64 timestamp)
+{
+ timestamp = TO_UNIX_EPOCH(timestamp);
+
+ return timestamp / TICKS_PER_SECOND;
+}
+
+struct timeval
+wim_timestamp_to_timeval(u64 timestamp)
+{
+ timestamp = TO_UNIX_EPOCH(timestamp);
+
+ return (struct timeval) {
+ .tv_sec = timestamp / TICKS_PER_SECOND,
+ .tv_usec = (timestamp % TICKS_PER_SECOND) / TICKS_PER_MICROSECOND,
+ };
+}
+
+struct timespec
+wim_timestamp_to_timespec(u64 timestamp)
+{
+ timestamp = TO_UNIX_EPOCH(timestamp);
+
+ return (struct timespec) {
+ .tv_sec = timestamp / TICKS_PER_SECOND,
+ .tv_nsec = (timestamp % TICKS_PER_SECOND) * NANOSECONDS_PER_TICK,
+ };
+}
+
+/* UNIX timestamps to Windows NT timestamps */
+
+u64
+time_t_to_wim_timestamp(time_t t)
+{
+ u64 timestamp = (u64)t * TICKS_PER_SECOND;
+
+ return TO_WINNT_EPOCH(timestamp);
+}
u64
-get_wim_timestamp(void)
+timeval_to_wim_timestamp(const struct timeval *tv)
+{
+ u64 timestamp = (u64)tv->tv_sec * TICKS_PER_SECOND +
+ (u64)tv->tv_usec * TICKS_PER_MICROSECOND;
+
+ return TO_WINNT_EPOCH(timestamp);
+}
+
+u64
+timespec_to_wim_timestamp(const struct timespec *ts)
+{
+ u64 timestamp = (u64)ts->tv_sec * TICKS_PER_SECOND +
+ (u64)ts->tv_nsec / NANOSECONDS_PER_TICK;
+
+ return TO_WINNT_EPOCH(timestamp);
+}
+
+/* Retrieve the current time as a WIM timestamp. */
+u64
+now_as_wim_timestamp(void)
{
struct timeval tv;
+
+ /* On Windows we rely on MinGW providing gettimeofday() for us. This
+ * could be changed to calling GetSystemTimeAsFileTime() directly, but
+ * now_as_wim_timestamp() isn't called much and it's simpler to keep the
+ * code for all platforms the same. */
gettimeofday(&tv, NULL);
- return timeval_to_wim_timestamp(tv);
+ return timeval_to_wim_timestamp(&tv);
}
+/* Translate a WIM timestamp into a human-readable string. */
void
wim_timestamp_to_str(u64 timestamp, tchar *buf, size_t len)
{
struct tm tm;
- time_t t = wim_timestamp_to_unix(timestamp);
+ time_t t = wim_timestamp_to_time_t(timestamp);
gmtime_r(&t, &tm);
tstrftime(buf, len, T("%a %b %d %H:%M:%S %Y UTC"), &tm);
}
-
goto out_progress;
#ifdef HAVE_STAT_NANOSECOND_PRECISION
- inode->i_creation_time = timespec_to_wim_timestamp(stbuf.st_mtim);
- inode->i_last_write_time = timespec_to_wim_timestamp(stbuf.st_mtim);
- inode->i_last_access_time = timespec_to_wim_timestamp(stbuf.st_atim);
+ inode->i_creation_time = timespec_to_wim_timestamp(&stbuf.st_mtim);
+ inode->i_last_write_time = timespec_to_wim_timestamp(&stbuf.st_mtim);
+ inode->i_last_access_time = timespec_to_wim_timestamp(&stbuf.st_atim);
#else
- inode->i_creation_time = unix_timestamp_to_wim(stbuf.st_mtime);
- inode->i_last_write_time = unix_timestamp_to_wim(stbuf.st_mtime);
- inode->i_last_access_time = unix_timestamp_to_wim(stbuf.st_atime);
+ inode->i_creation_time = time_t_to_wim_timestamp(stbuf.st_mtime);
+ inode->i_last_write_time = time_t_to_wim_timestamp(stbuf.st_mtime);
+ inode->i_last_access_time = time_t_to_wim_timestamp(stbuf.st_atime);
#endif
inode->i_resolved = 1;
if (params->add_flags & WIMLIB_ADD_FLAG_UNIX_DATA) {
for_dentry_in_tree(wim->image_metadata[image - 1]->root_dentry,
calculate_dentry_statistics,
image_info);
- image_info->last_modification_time = get_wim_timestamp();
+ image_info->last_modification_time = now_as_wim_timestamp();
}
/* Adds an image to the XML information. */
wim->wim_info = wim_info;
image_info->index = wim_info->num_images;
- image_info->creation_time = get_wim_timestamp();
+ image_info->creation_time = now_as_wim_timestamp();
xml_update_image_info(wim, image_info->index);
return 0;
git://wimlib.net / wimlib / commitdiff