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c7abe4f3 | 1 | /* Copyright (C) 1995,1996,1997,1998, 1999 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
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) | |
6 | * any later version. | |
7 | * | |
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. | |
12 | * | |
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 | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
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. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
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. | |
37 | * | |
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. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
47 | #include <stdio.h> | |
48 | #include "_scm.h" | |
876c87ce | 49 | #include "feature.h" |
20e6290e | 50 | |
1bbd0b84 | 51 | #include "scm_validate.h" |
20e6290e JB |
52 | #include "stime.h" |
53 | ||
0f2d19dd JB |
54 | #ifdef HAVE_UNISTD_H |
55 | #include <unistd.h> | |
56 | #endif | |
57 | ||
58 | \f | |
59 | # ifdef HAVE_SYS_TYPES_H | |
60 | # include <sys/types.h> | |
61 | # endif | |
62 | ||
63 | # ifdef TIME_WITH_SYS_TIME | |
64 | # include <sys/time.h> | |
65 | # include <time.h> | |
66 | # else | |
67 | # ifdef HAVE_SYS_TIME_H | |
68 | # include <sys/time.h> | |
69 | # else | |
70 | # ifdef HAVE_TIME_H | |
71 | # include <time.h> | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | ||
b1978258 GH |
76 | #ifdef HAVE_SYS_TIMES_H |
77 | # include <sys/times.h> | |
78 | #endif | |
79 | ||
80 | #ifdef HAVE_SYS_TIMEB_H | |
81 | # include <sys/timeb.h> | |
82 | #endif | |
0f2d19dd | 83 | |
b9525b92 GH |
84 | #ifndef tzname /* For SGI. */ |
85 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
86 | #endif | |
87 | ||
4d3bacdd JB |
88 | #ifdef MISSING_STRPTIME_DECL |
89 | extern char *strptime (); | |
90 | #endif | |
91 | ||
cda55316 | 92 | /* This should be figured out by autoconf. */ |
a2fc27b5 JB |
93 | #if ! defined(CLKTCK) && defined(CLK_TCK) |
94 | # define CLKTCK CLK_TCK | |
95 | #endif | |
96 | #if ! defined(CLKTCK) && defined(CLOCKS_PER_SEC) | |
0f2d19dd | 97 | # define CLKTCK CLOCKS_PER_SEC |
a2fc27b5 JB |
98 | #endif |
99 | #if ! defined(CLKTCK) | |
0f2d19dd | 100 | # define CLKTCK 60 |
0f2d19dd JB |
101 | #endif |
102 | ||
a2fc27b5 | 103 | |
0f2d19dd JB |
104 | #ifdef __STDC__ |
105 | # define timet time_t | |
106 | #else | |
107 | # define timet long | |
108 | #endif | |
109 | ||
110 | #ifdef HAVE_TIMES | |
0f2d19dd JB |
111 | static |
112 | long mytime() | |
0f2d19dd JB |
113 | { |
114 | struct tms time_buffer; | |
115 | times(&time_buffer); | |
116 | return time_buffer.tms_utime + time_buffer.tms_stime; | |
117 | } | |
118 | #else | |
119 | # ifdef LACK_CLOCK | |
120 | # define mytime() ((time((timet*)0) - scm_your_base) * CLKTCK) | |
121 | # else | |
122 | # define mytime clock | |
123 | # endif | |
124 | #endif | |
125 | ||
19468eff | 126 | extern int errno; |
0f2d19dd JB |
127 | |
128 | #ifdef HAVE_FTIME | |
129 | ||
130 | struct timeb scm_your_base = {0}; | |
1bbd0b84 | 131 | |
3b3b36dd | 132 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 133 | (), |
4079f87e | 134 | "Returns the number of time units since the interpreter was started.") |
1bbd0b84 | 135 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd JB |
136 | { |
137 | struct timeb time_buffer; | |
55c4d089 JB |
138 | |
139 | SCM tmp; | |
140 | ftime (&time_buffer); | |
0f2d19dd | 141 | time_buffer.time -= scm_your_base.time; |
55c4d089 JB |
142 | tmp = scm_long2num (time_buffer.millitm - scm_your_base.millitm); |
143 | tmp = scm_sum (tmp, | |
144 | scm_product (SCM_MAKINUM (1000), | |
145 | SCM_MAKINUM (time_buffer.time))); | |
146 | return scm_quotient (scm_product (tmp, SCM_MAKINUM (CLKTCK)), | |
147 | SCM_MAKINUM (1000)); | |
1bbd0b84 GB |
148 | } |
149 | #undef FUNC_NAME | |
150 | ||
0f2d19dd JB |
151 | |
152 | #else | |
153 | ||
154 | timet scm_your_base = 0; | |
1bbd0b84 | 155 | |
3b3b36dd | 156 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 157 | (), |
717050c8 | 158 | "") |
1bbd0b84 | 159 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd | 160 | { |
19468eff | 161 | return scm_long2num((time((timet*)0) - scm_your_base) * (int)CLKTCK); |
0f2d19dd | 162 | } |
1bbd0b84 GB |
163 | #undef FUNC_NAME |
164 | ||
0f2d19dd JB |
165 | #endif |
166 | ||
f25f761d | 167 | #ifdef HAVE_TIMES |
a1ec6916 | 168 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 169 | (void), |
4079f87e GB |
170 | "Returns an object with information about real and processor time. |
171 | The following procedures accept such an object as an argument and | |
172 | return a selected component: | |
173 | ||
174 | @table @code | |
175 | @item tms:clock | |
176 | The current real time, expressed as time units relative to an | |
177 | arbitrary base. | |
178 | @item tms:utime | |
179 | The CPU time units used by the calling process. | |
180 | @item tms:stime | |
181 | The CPU time units used by the system on behalf of the calling process. | |
182 | @item tms:cutime | |
183 | The CPU time units used by terminated child processes of the calling | |
184 | process, whose status has been collected (e.g., using @code{waitpid}). | |
185 | @item tms:cstime | |
186 | Similarly, the CPU times units used by the system on behalf of | |
187 | terminated child processes. | |
188 | @end table") | |
1bbd0b84 | 189 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 190 | { |
6afcd3b2 GH |
191 | struct tms t; |
192 | clock_t rv; | |
193 | ||
a8741caa | 194 | SCM result = scm_make_vector (SCM_MAKINUM(5), SCM_UNDEFINED); |
6afcd3b2 GH |
195 | rv = times (&t); |
196 | if (rv == -1) | |
1bbd0b84 | 197 | SCM_SYSERROR; |
6afcd3b2 GH |
198 | SCM_VELTS (result)[0] = scm_long2num (rv); |
199 | SCM_VELTS (result)[1] = scm_long2num (t.tms_utime); | |
200 | SCM_VELTS (result)[2] = scm_long2num (t.tms_stime); | |
201 | SCM_VELTS (result)[3] = scm_long2num (t.tms_cutime); | |
202 | SCM_VELTS (result)[4] = scm_long2num (t.tms_cstime); | |
203 | return result; | |
6afcd3b2 | 204 | } |
1bbd0b84 | 205 | #undef FUNC_NAME |
f25f761d | 206 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 207 | |
0e958795 JB |
208 | #ifndef HAVE_TZSET |
209 | /* GNU-WIN32's cygwin.dll doesn't have this. */ | |
210 | #define tzset() | |
211 | #endif | |
0f2d19dd JB |
212 | |
213 | ||
214 | static long scm_my_base = 0; | |
215 | ||
3b3b36dd | 216 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, |
1bbd0b84 | 217 | (void), |
4079f87e GB |
218 | "Returns the number of time units of processor time used by the interpreter. |
219 | Both "system" and "user" time | |
220 | are included but subprocesses are not.") | |
1bbd0b84 | 221 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 222 | { |
19468eff | 223 | return scm_long2num(mytime()-scm_my_base); |
0f2d19dd | 224 | } |
1bbd0b84 | 225 | #undef FUNC_NAME |
0f2d19dd | 226 | |
3b3b36dd | 227 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 228 | (void), |
4079f87e GB |
229 | "Returns the number of seconds since 1970-01-01 00:00:00 UTC, excluding |
230 | leap seconds.") | |
1bbd0b84 | 231 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 232 | { |
19468eff GH |
233 | timet timv; |
234 | ||
235 | SCM_DEFER_INTS; | |
236 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 237 | SCM_SYSERROR; |
19468eff GH |
238 | SCM_ALLOW_INTS; |
239 | return scm_long2num((long) timv); | |
240 | } | |
1bbd0b84 | 241 | #undef FUNC_NAME |
19468eff | 242 | |
a1ec6916 | 243 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 244 | (void), |
4079f87e GB |
245 | "Returns a pair containing the number of seconds and microseconds since |
246 | 1970-01-01 00:00:00 UTC, excluding leap seconds. Note: whether true | |
247 | microsecond resolution is available depends on the operating system.") | |
1bbd0b84 | 248 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
249 | { |
250 | #ifdef HAVE_GETTIMEOFDAY | |
251 | struct timeval time; | |
252 | ||
253 | SCM_DEFER_INTS; | |
254 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 255 | SCM_SYSERROR; |
19468eff GH |
256 | SCM_ALLOW_INTS; |
257 | return scm_cons (scm_long2num ((long) time.tv_sec), | |
258 | scm_long2num ((long) time.tv_usec)); | |
259 | #else | |
260 | # ifdef HAVE_FTIME | |
261 | struct timeb time; | |
262 | ||
263 | ftime(&time); | |
264 | return scm_cons (scm_long2num ((long) time.time), | |
9a81afca | 265 | SCM_MAKINUM (time.millitm * 1000)); |
19468eff GH |
266 | # else |
267 | timet timv; | |
268 | ||
269 | SCM_DEFER_INTS; | |
270 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 271 | SCM_SYSERROR; |
19468eff GH |
272 | SCM_ALLOW_INTS; |
273 | return scm_cons (scm_long2num (timv), SCM_MAKINUM (0)); | |
274 | # endif | |
275 | #endif | |
276 | } | |
1bbd0b84 | 277 | #undef FUNC_NAME |
19468eff GH |
278 | |
279 | static SCM | |
280 | filltime (struct tm *bd_time, int zoff, char *zname) | |
281 | { | |
a8741caa | 282 | SCM result = scm_make_vector (SCM_MAKINUM(11), SCM_UNDEFINED); |
19468eff GH |
283 | |
284 | SCM_VELTS (result)[0] = SCM_MAKINUM (bd_time->tm_sec); | |
285 | SCM_VELTS (result)[1] = SCM_MAKINUM (bd_time->tm_min); | |
286 | SCM_VELTS (result)[2] = SCM_MAKINUM (bd_time->tm_hour); | |
287 | SCM_VELTS (result)[3] = SCM_MAKINUM (bd_time->tm_mday); | |
288 | SCM_VELTS (result)[4] = SCM_MAKINUM (bd_time->tm_mon); | |
289 | SCM_VELTS (result)[5] = SCM_MAKINUM (bd_time->tm_year); | |
290 | SCM_VELTS (result)[6] = SCM_MAKINUM (bd_time->tm_wday); | |
291 | SCM_VELTS (result)[7] = SCM_MAKINUM (bd_time->tm_yday); | |
292 | SCM_VELTS (result)[8] = SCM_MAKINUM (bd_time->tm_isdst); | |
293 | SCM_VELTS (result)[9] = SCM_MAKINUM (zoff); | |
b9525b92 | 294 | SCM_VELTS (result)[10] = zname ? scm_makfrom0str (zname) : SCM_BOOL_F; |
19468eff GH |
295 | return result; |
296 | } | |
297 | ||
ef9ff3fd GH |
298 | static char tzvar[3] = "TZ"; |
299 | extern char ** environ; | |
300 | ||
301 | static char ** | |
3eeba8d4 | 302 | setzone (SCM zone, int pos, const char *subr) |
b9525b92 | 303 | { |
ef9ff3fd | 304 | char **oldenv = 0; |
b9525b92 GH |
305 | |
306 | if (!SCM_UNBNDP (zone)) | |
307 | { | |
ef9ff3fd | 308 | static char *tmpenv[2]; |
b9525b92 GH |
309 | char *buf; |
310 | ||
ef9ff3fd | 311 | /* if zone was supplied, set the environment temporarily. */ |
0c95b57d | 312 | SCM_ASSERT (SCM_ROSTRINGP (zone), zone, pos, subr); |
89958ad0 | 313 | SCM_COERCE_SUBSTR (zone); |
ef9ff3fd GH |
314 | buf = scm_must_malloc (SCM_LENGTH (zone) + sizeof (tzvar) + 1, |
315 | subr); | |
316 | sprintf (buf, "%s=%s", tzvar, SCM_ROCHARS (zone)); | |
317 | oldenv = environ; | |
318 | tmpenv[0] = buf; | |
319 | tmpenv[1] = 0; | |
320 | environ = tmpenv; | |
b9525b92 GH |
321 | tzset(); |
322 | } | |
ef9ff3fd | 323 | return oldenv; |
b9525b92 GH |
324 | } |
325 | ||
326 | static void | |
3eeba8d4 | 327 | restorezone (SCM zone, char **oldenv, const char *subr) |
b9525b92 GH |
328 | { |
329 | if (!SCM_UNBNDP (zone)) | |
330 | { | |
ef9ff3fd GH |
331 | scm_must_free (environ[0]); |
332 | environ = oldenv; | |
b9525b92 GH |
333 | tzset(); |
334 | } | |
335 | } | |
336 | ||
337 | ||
a1ec6916 | 338 | SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0, |
1bbd0b84 | 339 | (SCM time, SCM zone), |
4079f87e GB |
340 | "Returns an object representing the broken down components of @var{time}, |
341 | an integer like the one returned by @code{current-time}. The time zone | |
342 | for the calculation is optionally specified by @var{zone} (a string), | |
343 | otherwise the @code{TZ} environment variable or the system default is | |
344 | used.") | |
1bbd0b84 | 345 | #define FUNC_NAME s_scm_localtime |
19468eff GH |
346 | { |
347 | timet itime; | |
4edc089c | 348 | struct tm *ltptr, lt, *utc; |
19468eff GH |
349 | SCM result; |
350 | int zoff; | |
351 | char *zname = 0; | |
ef9ff3fd | 352 | char **oldenv; |
19468eff GH |
353 | int err; |
354 | ||
1bbd0b84 | 355 | itime = SCM_NUM2LONG (1,time); |
19468eff | 356 | SCM_DEFER_INTS; |
1bbd0b84 | 357 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
4edc089c | 358 | ltptr = localtime (&itime); |
19468eff | 359 | err = errno; |
4edc089c | 360 | if (ltptr) |
19468eff | 361 | { |
4d3bacdd | 362 | const char *ptr; |
ef9ff3fd GH |
363 | |
364 | /* copy zone name before calling gmtime or tzset. */ | |
b9525b92 | 365 | #ifdef HAVE_TM_ZONE |
ef9ff3fd | 366 | ptr = ltptr->tm_zone; |
b9525b92 GH |
367 | #else |
368 | # ifdef HAVE_TZNAME | |
ef9ff3fd | 369 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
4edc089c | 370 | # else |
1bbd0b84 | 371 | SCM_MISC_ERROR ("Not fully implemented on this platform",_EOL); |
4edc089c | 372 | # endif |
b9525b92 | 373 | #endif |
1bbd0b84 | 374 | zname = SCM_MUST_MALLOC (strlen (ptr) + 1); |
ef9ff3fd | 375 | strcpy (zname, ptr); |
19468eff | 376 | } |
ef9ff3fd GH |
377 | /* the struct is copied in case localtime and gmtime share a buffer. */ |
378 | if (ltptr) | |
379 | lt = *ltptr; | |
380 | utc = gmtime (&itime); | |
381 | if (utc == NULL) | |
382 | err = errno; | |
1bbd0b84 | 383 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 384 | /* delayed until zone has been restored. */ |
19468eff | 385 | errno = err; |
4edc089c | 386 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 387 | SCM_SYSERROR; |
19468eff GH |
388 | |
389 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
390 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
391 | + utc->tm_sec - lt.tm_sec; | |
392 | if (utc->tm_year < lt.tm_year) | |
19468eff | 393 | zoff -= 24 * 60 * 60; |
4edc089c | 394 | else if (utc->tm_year > lt.tm_year) |
19468eff | 395 | zoff += 24 * 60 * 60; |
4edc089c | 396 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 397 | zoff -= 24 * 60 * 60; |
4edc089c | 398 | else if (utc->tm_yday > lt.tm_yday) |
19468eff GH |
399 | zoff += 24 * 60 * 60; |
400 | ||
4edc089c | 401 | result = filltime (<, zoff, zname); |
19468eff | 402 | SCM_ALLOW_INTS; |
ef9ff3fd | 403 | scm_must_free (zname); |
19468eff GH |
404 | return result; |
405 | } | |
1bbd0b84 | 406 | #undef FUNC_NAME |
19468eff | 407 | |
a1ec6916 | 408 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 409 | (SCM time), |
4079f87e GB |
410 | "Returns an object representing the broken down components of @var{time}, |
411 | an integer like the one returned by @code{current-time}. The values | |
412 | are calculated for UTC.") | |
1bbd0b84 | 413 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
414 | { |
415 | timet itime; | |
416 | struct tm *bd_time; | |
417 | SCM result; | |
418 | ||
1bbd0b84 | 419 | itime = SCM_NUM2LONG (1,time); |
19468eff GH |
420 | SCM_DEFER_INTS; |
421 | bd_time = gmtime (&itime); | |
422 | if (bd_time == NULL) | |
1bbd0b84 | 423 | SCM_SYSERROR; |
19468eff GH |
424 | result = filltime (bd_time, 0, "GMT"); |
425 | SCM_ALLOW_INTS; | |
426 | return result; | |
427 | } | |
1bbd0b84 | 428 | #undef FUNC_NAME |
19468eff | 429 | |
b9525b92 GH |
430 | /* copy time components from a Scheme object to a struct tm. */ |
431 | static void | |
3eeba8d4 | 432 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 433 | { |
55a7fc62 GH |
434 | SCM *velts; |
435 | int i; | |
436 | ||
0c95b57d | 437 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
55a7fc62 | 438 | && SCM_LENGTH (sbd_time) == 11, |
b9525b92 | 439 | sbd_time, pos, subr); |
55a7fc62 GH |
440 | velts = SCM_VELTS (sbd_time); |
441 | for (i = 0; i < 10; i++) | |
442 | { | |
443 | SCM_ASSERT (SCM_INUMP (velts[i]), sbd_time, pos, subr); | |
444 | } | |
0c95b57d | 445 | SCM_ASSERT (SCM_FALSEP (velts[10]) || SCM_STRINGP (velts[10]), |
55a7fc62 GH |
446 | sbd_time, pos, subr); |
447 | ||
448 | lt->tm_sec = SCM_INUM (velts[0]); | |
449 | lt->tm_min = SCM_INUM (velts[1]); | |
450 | lt->tm_hour = SCM_INUM (velts[2]); | |
451 | lt->tm_mday = SCM_INUM (velts[3]); | |
452 | lt->tm_mon = SCM_INUM (velts[4]); | |
453 | lt->tm_year = SCM_INUM (velts[5]); | |
454 | lt->tm_wday = SCM_INUM (velts[6]); | |
455 | lt->tm_yday = SCM_INUM (velts[7]); | |
456 | lt->tm_isdst = SCM_INUM (velts[8]); | |
c7abe4f3 | 457 | #ifdef HAVE_TM_ZONE |
55a7fc62 GH |
458 | lt->tm_gmtoff = SCM_INUM (velts[9]); |
459 | if (SCM_FALSEP (velts[10])) | |
460 | lt->tm_zone = NULL; | |
461 | else | |
462 | lt->tm_zone = SCM_CHARS (velts[10]); | |
c7abe4f3 | 463 | #endif |
b9525b92 GH |
464 | } |
465 | ||
a1ec6916 | 466 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 467 | (SCM sbd_time, SCM zone), |
4079f87e GB |
468 | "@var{bd-time} is an object representing broken down time and @code{zone} |
469 | is an optional time zone specifier (otherwise the TZ environment variable | |
470 | or the system default is used). | |
471 | ||
472 | Returns a pair: the CAR is a corresponding | |
473 | integer time value like that returned | |
474 | by @code{current-time}; the CDR is a broken down time object, similar to | |
475 | as @var{bd-time} but with normalized values.") | |
1bbd0b84 | 476 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
477 | { |
478 | timet itime; | |
479 | struct tm lt, *utc; | |
480 | SCM result; | |
481 | int zoff; | |
482 | char *zname = 0; | |
ef9ff3fd | 483 | char **oldenv; |
b9525b92 GH |
484 | int err; |
485 | ||
1bbd0b84 | 486 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
19468eff GH |
487 | |
488 | SCM_DEFER_INTS; | |
1bbd0b84 | 489 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
19468eff | 490 | itime = mktime (<); |
b9525b92 | 491 | err = errno; |
19468eff | 492 | |
b9525b92 GH |
493 | if (itime != -1) |
494 | { | |
4d3bacdd | 495 | const char *ptr; |
ef9ff3fd GH |
496 | |
497 | /* copy zone name before calling gmtime or tzset. */ | |
b9525b92 | 498 | #ifdef HAVE_TM_ZONE |
ef9ff3fd | 499 | ptr = lt.tm_zone; |
b9525b92 GH |
500 | #else |
501 | # ifdef HAVE_TZNAME | |
ef9ff3fd | 502 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
4edc089c | 503 | # else |
ef9ff3fd | 504 | scm_misc_error (s_mktime, "Not fully implemented on this platform", |
da5b3eb1 | 505 | SCM_EOL); |
4edc089c | 506 | # endif |
b9525b92 | 507 | #endif |
1bbd0b84 | 508 | zname = SCM_MUST_MALLOC (strlen (ptr) + 1); |
ef9ff3fd | 509 | strcpy (zname, ptr); |
b9525b92 | 510 | } |
ef9ff3fd GH |
511 | |
512 | /* get timezone offset in seconds west of UTC. */ | |
513 | utc = gmtime (&itime); | |
514 | if (utc == NULL) | |
515 | err = errno; | |
516 | ||
1bbd0b84 | 517 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
518 | /* delayed until zone has been restored. */ |
519 | errno = err; | |
520 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 521 | SCM_SYSERROR; |
b9525b92 | 522 | |
19468eff GH |
523 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
524 | + utc->tm_sec - lt.tm_sec; | |
525 | if (utc->tm_year < lt.tm_year) | |
526 | zoff -= 24 * 60 * 60; | |
527 | else if (utc->tm_year > lt.tm_year) | |
528 | zoff += 24 * 60 * 60; | |
529 | else if (utc->tm_yday < lt.tm_yday) | |
530 | zoff -= 24 * 60 * 60; | |
531 | else if (utc->tm_yday > lt.tm_yday) | |
532 | zoff += 24 * 60 * 60; | |
533 | ||
19468eff GH |
534 | result = scm_cons (scm_long2num ((long) itime), |
535 | filltime (<, zoff, zname)); | |
536 | SCM_ALLOW_INTS; | |
ef9ff3fd | 537 | scm_must_free (zname); |
19468eff | 538 | return result; |
0f2d19dd | 539 | } |
1bbd0b84 | 540 | #undef FUNC_NAME |
0f2d19dd | 541 | |
a1ec6916 | 542 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 543 | (void), |
4079f87e GB |
544 | "Initialize the timezone from the TZ environment variable or the system |
545 | default. Usually this is done automatically by other procedures which | |
546 | use the time zone, but this procedure may need to be used if TZ | |
547 | is changed.") | |
1bbd0b84 | 548 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 549 | { |
19468eff GH |
550 | tzset(); |
551 | return SCM_UNSPECIFIED; | |
0f2d19dd | 552 | } |
1bbd0b84 | 553 | #undef FUNC_NAME |
0f2d19dd | 554 | |
a1ec6916 | 555 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 556 | (SCM format, SCM stime), |
4079f87e GB |
557 | "Formats a time specification @var{time} using @var{template}. @var{time} |
558 | is an object with time components in the form returned by @code{localtime} | |
559 | or @code{gmtime}. @var{template} is a string which can include formatting | |
560 | specifications introduced by a @code{%} character. The formatting of | |
561 | month and day names is dependent on the current locale. The value returned | |
562 | is the formatted string. | |
563 | @xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 564 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
565 | { |
566 | struct tm t; | |
567 | ||
568 | char *tbuf; | |
569 | int size = 50; | |
570 | char *fmt; | |
571 | int len; | |
ef9ff3fd | 572 | SCM result; |
b9525b92 | 573 | |
3b3b36dd | 574 | SCM_VALIDATE_ROSTRING (1,format); |
1bbd0b84 | 575 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 576 | |
89958ad0 | 577 | SCM_COERCE_SUBSTR (format); |
b9525b92 GH |
578 | fmt = SCM_ROCHARS (format); |
579 | len = SCM_ROLENGTH (format); | |
580 | ||
1bbd0b84 | 581 | tbuf = SCM_MUST_MALLOC (size); |
b9525b92 GH |
582 | while ((len = strftime (tbuf, size, fmt, &t)) == size) |
583 | { | |
584 | scm_must_free (tbuf); | |
585 | size *= 2; | |
1bbd0b84 | 586 | tbuf = SCM_MUST_MALLOC (size); |
b9525b92 | 587 | } |
ef9ff3fd GH |
588 | result = scm_makfromstr (tbuf, len, 0); |
589 | scm_must_free (tbuf); | |
590 | return result; | |
b9525b92 | 591 | } |
1bbd0b84 | 592 | #undef FUNC_NAME |
b9525b92 | 593 | |
f25f761d | 594 | #ifdef HAVE_STRPTIME |
a1ec6916 | 595 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 596 | (SCM format, SCM string), |
4079f87e GB |
597 | "Performs the reverse action to @code{strftime}, parsing @var{string} |
598 | according to the specification supplied in @var{template}. The | |
599 | interpretation of month and day names is dependent on the current | |
600 | locale. The | |
601 | value returned is a pair. The CAR has an object with time components | |
602 | in the form returned by @code{localtime} or @code{gmtime}, | |
603 | but the time zone components | |
604 | are not usefully set. | |
605 | The CDR reports the number of characters from @var{string} which | |
f25f761d | 606 | vwere used for the conversion.") |
1bbd0b84 | 607 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 608 | { |
b9525b92 GH |
609 | struct tm t; |
610 | char *fmt, *str, *rest; | |
611 | ||
3b3b36dd GB |
612 | SCM_VALIDATE_ROSTRING (1,format); |
613 | SCM_VALIDATE_ROSTRING (2,string); | |
b9525b92 | 614 | |
89958ad0 JB |
615 | SCM_COERCE_SUBSTR (format); |
616 | SCM_COERCE_SUBSTR (string); | |
b9525b92 GH |
617 | fmt = SCM_ROCHARS (format); |
618 | str = SCM_ROCHARS (string); | |
619 | ||
620 | /* initialize the struct tm */ | |
621 | #define tm_init(field) t.field = 0 | |
622 | tm_init (tm_sec); | |
623 | tm_init (tm_min); | |
624 | tm_init (tm_hour); | |
625 | tm_init (tm_mday); | |
626 | tm_init (tm_mon); | |
627 | tm_init (tm_year); | |
628 | tm_init (tm_wday); | |
629 | tm_init (tm_yday); | |
630 | #undef tm_init | |
631 | ||
632 | t.tm_isdst = -1; | |
633 | SCM_DEFER_INTS; | |
634 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
1bbd0b84 | 635 | SCM_SYSERROR; |
b9525b92 GH |
636 | |
637 | SCM_ALLOW_INTS; | |
638 | return scm_cons (filltime (&t, 0, NULL), SCM_MAKINUM (rest - str)); | |
b9525b92 | 639 | } |
1bbd0b84 | 640 | #undef FUNC_NAME |
f25f761d | 641 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 642 | |
0f2d19dd JB |
643 | void |
644 | scm_init_stime() | |
0f2d19dd JB |
645 | { |
646 | scm_sysintern("internal-time-units-per-second", | |
19468eff | 647 | scm_long2num((long)CLKTCK)); |
0f2d19dd JB |
648 | |
649 | #ifdef HAVE_FTIME | |
650 | if (!scm_your_base.time) ftime(&scm_your_base); | |
651 | #else | |
652 | if (!scm_your_base) time(&scm_your_base); | |
653 | #endif | |
654 | ||
655 | if (!scm_my_base) scm_my_base = mytime(); | |
656 | ||
876c87ce | 657 | scm_add_feature ("current-time"); |
0f2d19dd JB |
658 | #include "stime.x" |
659 | } | |
660 |