#include "window.h"
#include "blockinput.h"
-#ifndef NULL
-#define NULL 0
-#endif
-
#ifndef USER_FULL_NAME
#define USER_FULL_NAME pw->pw_gecos
#endif
#define TM_YEAR_BASE 1900
-/* Nonzero if TM_YEAR is a struct tm's tm_year value that causes
- asctime to have well-defined behavior. */
-#ifndef TM_YEAR_IN_ASCTIME_RANGE
-# define TM_YEAR_IN_ASCTIME_RANGE(tm_year) \
- (1000 - TM_YEAR_BASE <= (tm_year) && (tm_year) <= 9999 - TM_YEAR_BASE)
-#endif
-
#ifdef WINDOWSNT
extern Lisp_Object w32_get_internal_run_time (void);
#endif
static void time_overflow (void) NO_RETURN;
static Lisp_Object format_time_string (char const *, ptrdiff_t, Lisp_Object,
- int, time_t *, struct tm **);
+ int, time_t *, struct tm *);
static int tm_diff (struct tm *, struct tm *);
static void update_buffer_properties (EMACS_INT, EMACS_INT);
DEFUN ("constrain-to-field", Fconstrain_to_field, Sconstrain_to_field, 2, 5, 0,
doc: /* Return the position closest to NEW-POS that is in the same field as OLD-POS.
-
A field is a region of text with the same `field' property.
-If NEW-POS is nil, then the current point is used instead, and set to the
-constrained position if that is different.
+
+If NEW-POS is nil, then use the current point instead, and move point
+to the resulting constrained position, in addition to returning that
+position.
If OLD-POS is at the boundary of two fields, then the allowable
positions for NEW-POS depends on the value of the optional argument
(Lisp_Object format_string, Lisp_Object timeval, Lisp_Object universal)
{
time_t t;
- struct tm *tm;
+ struct tm tm;
CHECK_STRING (format_string);
format_string = code_convert_string_norecord (format_string,
static Lisp_Object
format_time_string (char const *format, ptrdiff_t formatlen,
- Lisp_Object timeval, int ut, time_t *tval, struct tm **tmp)
+ Lisp_Object timeval, int ut, time_t *tval, struct tm *tmp)
{
- ptrdiff_t size;
+ char buffer[4000];
+ char *buf = buffer;
+ size_t size = sizeof buffer;
+ size_t len;
+ Lisp_Object bufstring;
int usec;
int ns;
struct tm *tm;
+ USE_SAFE_ALLOCA;
if (! (lisp_time_argument (timeval, tval, &usec)
&& 0 <= usec && usec < 1000000))
error ("Invalid time specification");
ns = usec * 1000;
- /* This is probably enough. */
- size = formatlen;
- if (size <= (STRING_BYTES_BOUND - 50) / 6)
- size = size * 6 + 50;
-
- BLOCK_INPUT;
- tm = ut ? gmtime (tval) : localtime (tval);
- UNBLOCK_INPUT;
- if (! tm)
- time_overflow ();
- *tmp = tm;
-
- synchronize_system_time_locale ();
-
while (1)
{
- char *buf = (char *) alloca (size + 1);
- size_t result;
+ BLOCK_INPUT;
+
+ synchronize_system_time_locale ();
+
+ tm = ut ? gmtime (tval) : localtime (tval);
+ if (! tm)
+ {
+ UNBLOCK_INPUT;
+ time_overflow ();
+ }
+ *tmp = *tm;
buf[0] = '\1';
- BLOCK_INPUT;
- result = emacs_nmemftime (buf, size, format, formatlen, tm, ut, ns);
- UNBLOCK_INPUT;
- if ((result > 0 && result < size) || (result == 0 && buf[0] == '\0'))
- return code_convert_string_norecord (make_unibyte_string (buf, result),
- Vlocale_coding_system, 0);
+ len = emacs_nmemftime (buf, size, format, formatlen, tm, ut, ns);
+ if ((0 < len && len < size) || (len == 0 && buf[0] == '\0'))
+ break;
- /* If buffer was too small, make it bigger and try again. */
- BLOCK_INPUT;
- result = emacs_nmemftime (NULL, (size_t) -1, format, formatlen,
- tm, ut, ns);
+ /* Buffer was too small, so make it bigger and try again. */
+ len = emacs_nmemftime (NULL, SIZE_MAX, format, formatlen, tm, ut, ns);
UNBLOCK_INPUT;
- if (STRING_BYTES_BOUND <= result)
+ if (STRING_BYTES_BOUND <= len)
string_overflow ();
- size = result + 1;
+ size = len + 1;
+ SAFE_ALLOCA (buf, char *, size);
}
+
+ UNBLOCK_INPUT;
+ bufstring = make_unibyte_string (buf, len);
+ SAFE_FREE ();
+ return code_convert_string_norecord (bufstring, Vlocale_coding_system, 0);
}
DEFUN ("decode-time", Fdecode_time, Sdecode_time, 0, 1, 0,
BLOCK_INPUT;
decoded_time = localtime (&time_spec);
+ /* Make a copy, in case a signal handler modifies TZ or the struct. */
+ if (decoded_time)
+ save_tm = *decoded_time;
UNBLOCK_INPUT;
if (! (decoded_time
- && MOST_NEGATIVE_FIXNUM - TM_YEAR_BASE <= decoded_time->tm_year
- && decoded_time->tm_year <= MOST_POSITIVE_FIXNUM - TM_YEAR_BASE))
+ && MOST_NEGATIVE_FIXNUM - TM_YEAR_BASE <= save_tm.tm_year
+ && save_tm.tm_year <= MOST_POSITIVE_FIXNUM - TM_YEAR_BASE))
time_overflow ();
- XSETFASTINT (list_args[0], decoded_time->tm_sec);
- XSETFASTINT (list_args[1], decoded_time->tm_min);
- XSETFASTINT (list_args[2], decoded_time->tm_hour);
- XSETFASTINT (list_args[3], decoded_time->tm_mday);
- XSETFASTINT (list_args[4], decoded_time->tm_mon + 1);
+ XSETFASTINT (list_args[0], save_tm.tm_sec);
+ XSETFASTINT (list_args[1], save_tm.tm_min);
+ XSETFASTINT (list_args[2], save_tm.tm_hour);
+ XSETFASTINT (list_args[3], save_tm.tm_mday);
+ XSETFASTINT (list_args[4], save_tm.tm_mon + 1);
/* On 64-bit machines an int is narrower than EMACS_INT, thus the
cast below avoids overflow in int arithmetics. */
- XSETINT (list_args[5], TM_YEAR_BASE + (EMACS_INT) decoded_time->tm_year);
- XSETFASTINT (list_args[6], decoded_time->tm_wday);
- list_args[7] = (decoded_time->tm_isdst)? Qt : Qnil;
+ XSETINT (list_args[5], TM_YEAR_BASE + (EMACS_INT) save_tm.tm_year);
+ XSETFASTINT (list_args[6], save_tm.tm_wday);
+ list_args[7] = save_tm.tm_isdst ? Qt : Qnil;
- /* Make a copy, in case gmtime modifies the struct. */
- save_tm = *decoded_time;
BLOCK_INPUT;
decoded_time = gmtime (&time_spec);
- UNBLOCK_INPUT;
if (decoded_time == 0)
list_args[8] = Qnil;
else
XSETINT (list_args[8], tm_diff (&save_tm, decoded_time));
+ UNBLOCK_INPUT;
return Flist (9, list_args);
}
else
error ("Invalid time zone specification");
+ BLOCK_INPUT;
+
/* Set TZ before calling mktime; merely adjusting mktime's returned
value doesn't suffice, since that would mishandle leap seconds. */
set_time_zone_rule (tzstring);
- BLOCK_INPUT;
value = mktime (&tm);
- UNBLOCK_INPUT;
/* Restore TZ to previous value. */
newenv = environ;
environ = oldenv;
- xfree (newenv);
#ifdef LOCALTIME_CACHE
tzset ();
#endif
+ UNBLOCK_INPUT;
+
+ xfree (newenv);
}
if (value == (time_t) -1)
{
time_t value;
struct tm *tm;
- register char *tem;
+ char buf[sizeof "Mon Apr 30 12:49:17 " + INT_STRLEN_BOUND (int) + 1];
+ int len IF_LINT (= 0);
if (! lisp_time_argument (specified_time, &value, NULL))
error ("Invalid time specification");
- /* Convert to a string, checking for out-of-range time stamps.
- Don't use 'ctime', as that might dump core if VALUE is out of
- range. */
+ /* Convert to a string in ctime format, except without the trailing
+ newline, and without the 4-digit year limit. Don't use asctime
+ or ctime, as they might dump core if the year is outside the
+ range -999 .. 9999. */
BLOCK_INPUT;
tm = localtime (&value);
+ if (tm)
+ {
+ static char const wday_name[][4] =
+ { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
+ static char const mon_name[][4] =
+ { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
+ printmax_t year_base = TM_YEAR_BASE;
+
+ len = sprintf (buf, "%s %s%3d %02d:%02d:%02d %"pMd,
+ wday_name[tm->tm_wday], mon_name[tm->tm_mon], tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec,
+ tm->tm_year + year_base);
+ }
UNBLOCK_INPUT;
- if (! (tm && TM_YEAR_IN_ASCTIME_RANGE (tm->tm_year) && (tem = asctime (tm))))
+ if (! tm)
time_overflow ();
- /* Remove the trailing newline. */
- tem[strlen (tem) - 1] = '\0';
-
- return build_string (tem);
+ return make_unibyte_string (buf, len);
}
/* Yield A - B, measured in seconds.
(Lisp_Object specified_time)
{
time_t value;
+ int offset;
struct tm *t;
struct tm localtm;
- struct tm *localt;
Lisp_Object zone_offset, zone_name;
zone_offset = Qnil;
zone_name = format_time_string ("%Z", sizeof "%Z" - 1, specified_time,
- 0, &value, &localt);
- localtm = *localt;
+ 0, &value, &localtm);
BLOCK_INPUT;
t = gmtime (&value);
+ if (t)
+ offset = tm_diff (&localtm, t);
UNBLOCK_INPUT;
if (t)
{
- int offset = tm_diff (&localtm, t);
zone_offset = make_number (offset);
if (SCHARS (zone_name) == 0)
{
(Lisp_Object tz)
{
const char *tzstring;
+ char **old_environbuf;
+
+ if (! (NILP (tz) || EQ (tz, Qt)))
+ CHECK_STRING (tz);
+
+ BLOCK_INPUT;
/* When called for the first time, save the original TZ. */
- if (!environbuf)
+ old_environbuf = environbuf;
+ if (!old_environbuf)
initial_tz = (char *) getenv ("TZ");
if (NILP (tz))
else if (EQ (tz, Qt))
tzstring = "UTC0";
else
- {
- CHECK_STRING (tz);
- tzstring = SSDATA (tz);
- }
+ tzstring = SSDATA (tz);
set_time_zone_rule (tzstring);
- xfree (environbuf);
environbuf = environ;
+ UNBLOCK_INPUT;
+
+ xfree (old_environbuf);
return Qnil;
}
HCoop / bpt / emacs.git / blobdiff