1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
48 #include "libguile/_scm.h"
49 #include "libguile/feature.h"
50 #include "libguile/strings.h"
51 #include "libguile/vectors.h"
53 #include "libguile/validate.h"
54 #include "libguile/stime.h"
61 # ifdef HAVE_SYS_TYPES_H
62 # include <sys/types.h>
69 # ifdef TIME_WITH_SYS_TIME
70 # include <sys/time.h>
73 # ifdef HAVE_SYS_TIME_H
74 # include <sys/time.h>
82 #ifdef HAVE_SYS_TIMES_H
83 # include <sys/times.h>
86 #ifdef HAVE_SYS_TIMEB_H
87 # include <sys/timeb.h>
90 #ifndef tzname /* For SGI. */
91 extern char *tzname
[]; /* RS6000 and others reject char **tzname. */
93 #if defined (__MINGW32__)
94 # define tzname _tzname
97 #ifdef MISSING_STRPTIME_DECL
98 extern char *strptime ();
101 /* This should be figured out by autoconf. */
102 #if ! defined(CLKTCK) && defined(CLK_TCK)
103 # define CLKTCK ((int) CLK_TCK)
105 #if ! defined(CLKTCK) && defined(CLOCKS_PER_SEC)
106 # define CLKTCK ((int) CLOCKS_PER_SEC)
108 #if ! defined(CLKTCK)
113 # define timet time_t
122 struct tms time_buffer
;
124 return time_buffer
.tms_utime
+ time_buffer
.tms_stime
;
128 # define mytime() ((time((timet*)0) - scm_your_base) * CLKTCK)
130 # define mytime clock
135 struct timeb scm_your_base
= {0};
137 timet scm_your_base
= 0;
140 SCM_DEFINE (scm_get_internal_real_time
, "get-internal-real-time", 0, 0, 0,
142 "Return the number of time units since the interpreter was\n"
144 #define FUNC_NAME s_scm_get_internal_real_time
147 struct timeb time_buffer
;
150 ftime (&time_buffer
);
151 time_buffer
.time
-= scm_your_base
.time
;
152 tmp
= scm_long2num (time_buffer
.millitm
- scm_your_base
.millitm
);
154 scm_product (SCM_MAKINUM (1000),
155 SCM_MAKINUM (time_buffer
.time
)));
156 return scm_quotient (scm_product (tmp
, SCM_MAKINUM (CLKTCK
)),
159 return scm_long2num((time((timet
*)0) - scm_your_base
) * (int)CLKTCK
);
160 #endif /* HAVE_FTIME */
166 SCM_DEFINE (scm_times
, "times", 0, 0, 0,
168 "Return an object with information about real and processor\n"
169 "time. The following procedures accept such an object as an\n"
170 "argument and return a selected component:\n"
174 "The current real time, expressed as time units relative to an\n"
177 "The CPU time units used by the calling process.\n"
179 "The CPU time units used by the system on behalf of the calling\n"
182 "The CPU time units used by terminated child processes of the\n"
183 "calling process, whose status has been collected (e.g., using\n"
186 "Similarly, the CPU times units used by the system on behalf of\n"
187 "terminated child processes.\n"
189 #define FUNC_NAME s_scm_times
194 SCM result
= scm_c_make_vector (5, SCM_UNDEFINED
);
198 SCM_VECTOR_SET (result
, 0, scm_long2num (rv
));
199 SCM_VECTOR_SET (result
, 1, scm_long2num (t
.tms_utime
));
200 SCM_VECTOR_SET (result
, 2, scm_long2num (t
.tms_stime
));
201 SCM_VECTOR_SET (result
,3, scm_long2num (t
.tms_cutime
));
202 SCM_VECTOR_SET (result
, 4, scm_long2num (t
.tms_cstime
));
206 #endif /* HAVE_TIMES */
208 static long scm_my_base
= 0;
211 scm_c_get_internal_run_time ()
213 return mytime () - scm_my_base
;
216 SCM_DEFINE (scm_get_internal_run_time
, "get-internal-run-time", 0, 0, 0,
218 "Return the number of time units of processor time used by the\n"
219 "interpreter. Both @emph{system} and @emph{user} time are\n"
220 "included but subprocesses are not.")
221 #define FUNC_NAME s_scm_get_internal_run_time
223 return scm_long2num (scm_c_get_internal_run_time ());
227 SCM_DEFINE (scm_current_time
, "current-time", 0, 0, 0,
229 "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n"
230 "excluding leap seconds.")
231 #define FUNC_NAME s_scm_current_time
236 if ((timv
= time (0)) == -1)
239 return scm_long2num((long) timv
);
243 SCM_DEFINE (scm_gettimeofday
, "gettimeofday", 0, 0, 0,
245 "Return a pair containing the number of seconds and microseconds\n"
246 "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n"
247 "whether true microsecond resolution is available depends on the\n"
249 #define FUNC_NAME s_scm_gettimeofday
251 #ifdef HAVE_GETTIMEOFDAY
255 if (gettimeofday (&time
, NULL
) == -1)
258 return scm_cons (scm_long2num ((long) time
.tv_sec
),
259 scm_long2num ((long) time
.tv_usec
));
265 return scm_cons (scm_long2num ((long) time
.time
),
266 SCM_MAKINUM (time
.millitm
* 1000));
271 if ((timv
= time (0)) == -1)
274 return scm_cons (scm_long2num (timv
), SCM_MAKINUM (0));
281 filltime (struct tm
*bd_time
, int zoff
, char *zname
)
283 SCM result
= scm_c_make_vector (11, SCM_UNDEFINED
);
285 SCM_VECTOR_SET (result
,0, SCM_MAKINUM (bd_time
->tm_sec
));
286 SCM_VECTOR_SET (result
,1, SCM_MAKINUM (bd_time
->tm_min
));
287 SCM_VECTOR_SET (result
,2, SCM_MAKINUM (bd_time
->tm_hour
));
288 SCM_VECTOR_SET (result
,3, SCM_MAKINUM (bd_time
->tm_mday
));
289 SCM_VECTOR_SET (result
,4, SCM_MAKINUM (bd_time
->tm_mon
));
290 SCM_VECTOR_SET (result
,5, SCM_MAKINUM (bd_time
->tm_year
));
291 SCM_VECTOR_SET (result
,6, SCM_MAKINUM (bd_time
->tm_wday
));
292 SCM_VECTOR_SET (result
,7, SCM_MAKINUM (bd_time
->tm_yday
));
293 SCM_VECTOR_SET (result
,8, SCM_MAKINUM (bd_time
->tm_isdst
));
294 SCM_VECTOR_SET (result
,9, SCM_MAKINUM (zoff
));
295 SCM_VECTOR_SET (result
,10, zname
? scm_makfrom0str (zname
) : SCM_BOOL_F
);
299 static char tzvar
[3] = "TZ";
300 extern char ** environ
;
302 /* if zone is set, create a temporary environment with only a TZ
303 string. other threads or interrupt handlers shouldn't be allowed
304 to run until the corresponding restorezone is called. hence the use
305 of a static variable for tmpenv is no big deal. */
307 setzone (SCM zone
, int pos
, const char *subr
)
311 if (!SCM_UNBNDP (zone
))
313 static char *tmpenv
[2];
316 SCM_ASSERT (SCM_STRINGP (zone
), zone
, pos
, subr
);
317 buf
= scm_malloc (SCM_STRING_LENGTH (zone
) + sizeof (tzvar
) + 1);
318 sprintf (buf
, "%s=%s", tzvar
, SCM_STRING_CHARS (zone
));
328 restorezone (SCM zone
, char **oldenv
, const char *subr SCM_UNUSED
)
330 if (!SCM_UNBNDP (zone
))
335 /* for the possible benefit of user code linked with libguile. */
341 SCM_DEFINE (scm_localtime
, "localtime", 1, 1, 0,
342 (SCM time
, SCM zone
),
343 "Return an object representing the broken down components of\n"
344 "@var{time}, an integer like the one returned by\n"
345 "@code{current-time}. The time zone for the calculation is\n"
346 "optionally specified by @var{zone} (a string), otherwise the\n"
347 "@code{TZ} environment variable or the system default is used.")
348 #define FUNC_NAME s_scm_localtime
351 struct tm
*ltptr
, lt
, *utc
;
358 itime
= SCM_NUM2LONG (1, time
);
360 /* deferring interupts is essential since a) setzone may install a temporary
361 environment b) localtime uses a static buffer. */
363 oldenv
= setzone (zone
, SCM_ARG2
, FUNC_NAME
);
364 #ifdef LOCALTIME_CACHE
367 ltptr
= localtime (&itime
);
373 /* copy zone name before calling gmtime or restoring zone. */
374 #if defined (HAVE_TM_ZONE)
375 ptr
= ltptr
->tm_zone
;
376 #elif defined (HAVE_TZNAME)
377 ptr
= tzname
[ (ltptr
->tm_isdst
== 1) ? 1 : 0 ];
381 zname
= scm_malloc (strlen (ptr
) + 1);
384 /* the struct is copied in case localtime and gmtime share a buffer. */
387 utc
= gmtime (&itime
);
390 restorezone (zone
, oldenv
, FUNC_NAME
);
391 /* delayed until zone has been restored. */
393 if (utc
== NULL
|| ltptr
== NULL
)
396 /* calculate timezone offset in seconds west of UTC. */
397 zoff
= (utc
->tm_hour
- lt
.tm_hour
) * 3600 + (utc
->tm_min
- lt
.tm_min
) * 60
398 + utc
->tm_sec
- lt
.tm_sec
;
399 if (utc
->tm_year
< lt
.tm_year
)
400 zoff
-= 24 * 60 * 60;
401 else if (utc
->tm_year
> lt
.tm_year
)
402 zoff
+= 24 * 60 * 60;
403 else if (utc
->tm_yday
< lt
.tm_yday
)
404 zoff
-= 24 * 60 * 60;
405 else if (utc
->tm_yday
> lt
.tm_yday
)
406 zoff
+= 24 * 60 * 60;
408 result
= filltime (<
, zoff
, zname
);
416 SCM_DEFINE (scm_gmtime
, "gmtime", 1, 0, 0,
418 "Return an object representing the broken down components of\n"
419 "@var{time}, an integer like the one returned by\n"
420 "@code{current-time}. The values are calculated for UTC.")
421 #define FUNC_NAME s_scm_gmtime
427 itime
= SCM_NUM2LONG (1, time
);
429 bd_time
= gmtime (&itime
);
432 result
= filltime (bd_time
, 0, "GMT");
438 /* copy time components from a Scheme object to a struct tm. */
440 bdtime2c (SCM sbd_time
, struct tm
*lt
, int pos
, const char *subr
)
445 SCM_ASSERT (SCM_VECTORP (sbd_time
)
446 && SCM_VECTOR_LENGTH (sbd_time
) == 11,
447 sbd_time
, pos
, subr
);
448 velts
= SCM_VELTS (sbd_time
);
449 for (i
= 0; i
< 10; i
++)
451 SCM_ASSERT (SCM_INUMP (velts
[i
]), sbd_time
, pos
, subr
);
453 SCM_ASSERT (SCM_FALSEP (velts
[10]) || SCM_STRINGP (velts
[10]),
454 sbd_time
, pos
, subr
);
456 lt
->tm_sec
= SCM_INUM (velts
[0]);
457 lt
->tm_min
= SCM_INUM (velts
[1]);
458 lt
->tm_hour
= SCM_INUM (velts
[2]);
459 lt
->tm_mday
= SCM_INUM (velts
[3]);
460 lt
->tm_mon
= SCM_INUM (velts
[4]);
461 lt
->tm_year
= SCM_INUM (velts
[5]);
462 lt
->tm_wday
= SCM_INUM (velts
[6]);
463 lt
->tm_yday
= SCM_INUM (velts
[7]);
464 lt
->tm_isdst
= SCM_INUM (velts
[8]);
466 lt
->tm_gmtoff
= SCM_INUM (velts
[9]);
467 if (SCM_FALSEP (velts
[10]))
470 lt
->tm_zone
= SCM_STRING_CHARS (velts
[10]);
474 SCM_DEFINE (scm_mktime
, "mktime", 1, 1, 0,
475 (SCM sbd_time
, SCM zone
),
476 "@var{bd-time} is an object representing broken down time and @code{zone}\n"
477 "is an optional time zone specifier (otherwise the TZ environment variable\n"
478 "or the system default is used).\n\n"
479 "Returns a pair: the car is a corresponding\n"
480 "integer time value like that returned\n"
481 "by @code{current-time}; the cdr is a broken down time object, similar to\n"
482 "as @var{bd-time} but with normalized values.")
483 #define FUNC_NAME s_scm_mktime
493 bdtime2c (sbd_time
, <
, SCM_ARG1
, FUNC_NAME
);
496 oldenv
= setzone (zone
, SCM_ARG2
, FUNC_NAME
);
497 #ifdef LOCALTIME_CACHE
500 itime
= mktime (<
);
507 /* copy zone name before calling gmtime or restoring the zone. */
508 #if defined (HAVE_TM_ZONE)
510 #elif defined (HAVE_TZNAME)
511 ptr
= tzname
[ (lt
.tm_isdst
== 1) ? 1 : 0 ];
515 zname
= scm_malloc (strlen (ptr
) + 1);
519 /* get timezone offset in seconds west of UTC. */
520 utc
= gmtime (&itime
);
524 restorezone (zone
, oldenv
, FUNC_NAME
);
525 /* delayed until zone has been restored. */
527 if (utc
== NULL
|| itime
== -1)
530 zoff
= (utc
->tm_hour
- lt
.tm_hour
) * 3600 + (utc
->tm_min
- lt
.tm_min
) * 60
531 + utc
->tm_sec
- lt
.tm_sec
;
532 if (utc
->tm_year
< lt
.tm_year
)
533 zoff
-= 24 * 60 * 60;
534 else if (utc
->tm_year
> lt
.tm_year
)
535 zoff
+= 24 * 60 * 60;
536 else if (utc
->tm_yday
< lt
.tm_yday
)
537 zoff
-= 24 * 60 * 60;
538 else if (utc
->tm_yday
> lt
.tm_yday
)
539 zoff
+= 24 * 60 * 60;
541 result
= scm_cons (scm_long2num ((long) itime
),
542 filltime (<
, zoff
, zname
));
551 SCM_DEFINE (scm_tzset
, "tzset", 0, 0, 0,
553 "Initialize the timezone from the TZ environment variable\n"
554 "or the system default. It's not usually necessary to call this procedure\n"
555 "since it's done automatically by other procedures that depend on the\n"
557 #define FUNC_NAME s_scm_tzset
560 return SCM_UNSPECIFIED
;
563 #endif /* HAVE_TZSET */
565 SCM_DEFINE (scm_strftime
, "strftime", 2, 0, 0,
566 (SCM format
, SCM stime
),
567 "Formats a time specification @var{time} using @var{template}. @var{time}\n"
568 "is an object with time components in the form returned by @code{localtime}\n"
569 "or @code{gmtime}. @var{template} is a string which can include formatting\n"
570 "specifications introduced by a @code{%} character. The formatting of\n"
571 "month and day names is dependent on the current locale. The value returned\n"
572 "is the formatted string.\n"
573 "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)")
574 #define FUNC_NAME s_scm_strftime
584 SCM_VALIDATE_STRING (1, format
);
585 bdtime2c (stime
, &t
, SCM_ARG2
, FUNC_NAME
);
587 fmt
= SCM_STRING_CHARS (format
);
588 len
= SCM_STRING_LENGTH (format
);
590 /* Ugly hack: strftime can return 0 if its buffer is too small,
591 but some valid time strings (e.g. "%p") can sometimes produce
592 a zero-byte output string! Workaround is to prepend a junk
593 character to the format string, so that valid returns are always
595 myfmt
= scm_malloc (len
+2);
597 strncpy(myfmt
+1, fmt
, len
);
600 tbuf
= scm_malloc (size
);
602 #if !defined (HAVE_TM_ZONE)
603 /* it seems the only way to tell non-GNU versions of strftime what
604 zone to use (for the %Z format) is to set TZ in the
605 environment. interrupts and thread switching must be deferred
606 until TZ is restored. */
607 char **oldenv
= NULL
;
608 SCM
*velts
= SCM_VELTS (stime
);
611 if (!SCM_FALSEP (velts
[10]) && *SCM_STRING_CHARS (velts
[10]) != 0)
613 /* it's not required that the TZ setting be correct, just that
614 it has the right name. so try something like TZ=EST0.
615 using only TZ=EST would be simpler but it doesn't work on
616 some OSs, e.g., Solaris. */
618 scm_string_append (scm_cons (velts
[10],
619 scm_cons (scm_makfrom0str ("0"),
624 oldenv
= setzone (zone
, SCM_ARG2
, FUNC_NAME
);
628 #ifdef LOCALTIME_CACHE
632 /* POSIX says strftime returns 0 on buffer overrun, but old
633 systems (i.e. libc 4 on GNU/Linux) might return `size' in that
635 while ((len
= strftime (tbuf
, size
, myfmt
, &t
)) == 0 || len
== size
)
639 tbuf
= scm_malloc (size
);
642 #if !defined (HAVE_TM_ZONE)
645 restorezone (velts
[10], oldenv
, FUNC_NAME
);
651 result
= scm_mem2string (tbuf
+ 1, len
- 1);
659 SCM_DEFINE (scm_strptime
, "strptime", 2, 0, 0,
660 (SCM format
, SCM string
),
661 "Performs the reverse action to @code{strftime}, parsing\n"
662 "@var{string} according to the specification supplied in\n"
663 "@var{template}. The interpretation of month and day names is\n"
664 "dependent on the current locale. The value returned is a pair.\n"
665 "The car has an object with time components\n"
666 "in the form returned by @code{localtime} or @code{gmtime},\n"
667 "but the time zone components\n"
668 "are not usefully set.\n"
669 "The cdr reports the number of characters from @var{string}\n"
670 "which were used for the conversion.")
671 #define FUNC_NAME s_scm_strptime
674 char *fmt
, *str
, *rest
;
676 SCM_VALIDATE_STRING (1, format
);
677 SCM_VALIDATE_STRING (2, string
);
679 fmt
= SCM_STRING_CHARS (format
);
680 str
= SCM_STRING_CHARS (string
);
682 /* initialize the struct tm */
683 #define tm_init(field) t.field = 0
696 if ((rest
= strptime (str
, fmt
, &t
)) == NULL
)
700 return scm_cons (filltime (&t
, 0, NULL
), SCM_MAKINUM (rest
- str
));
703 #endif /* HAVE_STRPTIME */
708 scm_c_define ("internal-time-units-per-second",
709 scm_long2num((long)CLKTCK
));
712 if (!scm_your_base
.time
) ftime(&scm_your_base
);
714 if (!scm_your_base
) time(&scm_your_base
);
717 if (!scm_my_base
) scm_my_base
= mytime();
719 scm_add_feature ("current-time");
720 #include "libguile/stime.x"