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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" |
7ab3fdd5 | 50 | #include "strings.h" |
003d1fd0 | 51 | #include "vectors.h" |
20e6290e | 52 | |
b6791b2e | 53 | #include "validate.h" |
20e6290e JB |
54 | #include "stime.h" |
55 | ||
0f2d19dd JB |
56 | #ifdef HAVE_UNISTD_H |
57 | #include <unistd.h> | |
58 | #endif | |
59 | ||
60 | \f | |
61 | # ifdef HAVE_SYS_TYPES_H | |
62 | # include <sys/types.h> | |
63 | # endif | |
64 | ||
65 | # ifdef TIME_WITH_SYS_TIME | |
66 | # include <sys/time.h> | |
67 | # include <time.h> | |
68 | # else | |
69 | # ifdef HAVE_SYS_TIME_H | |
70 | # include <sys/time.h> | |
71 | # else | |
72 | # ifdef HAVE_TIME_H | |
73 | # include <time.h> | |
74 | # endif | |
75 | # endif | |
76 | # endif | |
77 | ||
b1978258 GH |
78 | #ifdef HAVE_SYS_TIMES_H |
79 | # include <sys/times.h> | |
80 | #endif | |
81 | ||
82 | #ifdef HAVE_SYS_TIMEB_H | |
83 | # include <sys/timeb.h> | |
84 | #endif | |
0f2d19dd | 85 | |
b9525b92 GH |
86 | #ifndef tzname /* For SGI. */ |
87 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
88 | #endif | |
89 | ||
4d3bacdd JB |
90 | #ifdef MISSING_STRPTIME_DECL |
91 | extern char *strptime (); | |
92 | #endif | |
93 | ||
cda55316 | 94 | /* This should be figured out by autoconf. */ |
a2fc27b5 JB |
95 | #if ! defined(CLKTCK) && defined(CLK_TCK) |
96 | # define CLKTCK CLK_TCK | |
97 | #endif | |
98 | #if ! defined(CLKTCK) && defined(CLOCKS_PER_SEC) | |
0f2d19dd | 99 | # define CLKTCK CLOCKS_PER_SEC |
a2fc27b5 JB |
100 | #endif |
101 | #if ! defined(CLKTCK) | |
0f2d19dd | 102 | # define CLKTCK 60 |
0f2d19dd JB |
103 | #endif |
104 | ||
a2fc27b5 | 105 | |
0f2d19dd JB |
106 | #ifdef __STDC__ |
107 | # define timet time_t | |
108 | #else | |
109 | # define timet long | |
110 | #endif | |
111 | ||
112 | #ifdef HAVE_TIMES | |
0f2d19dd JB |
113 | static |
114 | long mytime() | |
0f2d19dd JB |
115 | { |
116 | struct tms time_buffer; | |
117 | times(&time_buffer); | |
118 | return time_buffer.tms_utime + time_buffer.tms_stime; | |
119 | } | |
120 | #else | |
121 | # ifdef LACK_CLOCK | |
122 | # define mytime() ((time((timet*)0) - scm_your_base) * CLKTCK) | |
123 | # else | |
124 | # define mytime clock | |
125 | # endif | |
126 | #endif | |
127 | ||
19468eff | 128 | extern int errno; |
0f2d19dd JB |
129 | |
130 | #ifdef HAVE_FTIME | |
0f2d19dd | 131 | struct timeb scm_your_base = {0}; |
b450f070 GB |
132 | #else |
133 | timet scm_your_base = 0; | |
134 | #endif | |
1bbd0b84 | 135 | |
3b3b36dd | 136 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 137 | (), |
b380b885 | 138 | "Returns the number of time units since the interpreter was started.") |
1bbd0b84 | 139 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd | 140 | { |
b450f070 | 141 | #ifdef HAVE_FTIME |
0f2d19dd | 142 | struct timeb time_buffer; |
55c4d089 JB |
143 | |
144 | SCM tmp; | |
145 | ftime (&time_buffer); | |
0f2d19dd | 146 | time_buffer.time -= scm_your_base.time; |
55c4d089 JB |
147 | tmp = scm_long2num (time_buffer.millitm - scm_your_base.millitm); |
148 | tmp = scm_sum (tmp, | |
149 | scm_product (SCM_MAKINUM (1000), | |
150 | SCM_MAKINUM (time_buffer.time))); | |
151 | return scm_quotient (scm_product (tmp, SCM_MAKINUM (CLKTCK)), | |
152 | SCM_MAKINUM (1000)); | |
0f2d19dd | 153 | #else |
19468eff | 154 | return scm_long2num((time((timet*)0) - scm_your_base) * (int)CLKTCK); |
b450f070 | 155 | #endif /* HAVE_FTIME */ |
0f2d19dd | 156 | } |
1bbd0b84 GB |
157 | #undef FUNC_NAME |
158 | ||
0f2d19dd | 159 | |
f25f761d | 160 | #ifdef HAVE_TIMES |
a1ec6916 | 161 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 162 | (void), |
b380b885 MD |
163 | "Returns an object with information about real and processor time.\n" |
164 | "The following procedures accept such an object as an argument and\n" | |
165 | "return a selected component:\n\n" | |
166 | "@table @code\n" | |
167 | "@item tms:clock\n" | |
168 | "The current real time, expressed as time units relative to an\n" | |
169 | "arbitrary base.\n" | |
170 | "@item tms:utime\n" | |
171 | "The CPU time units used by the calling process.\n" | |
172 | "@item tms:stime\n" | |
173 | "The CPU time units used by the system on behalf of the calling process.\n" | |
174 | "@item tms:cutime\n" | |
175 | "The CPU time units used by terminated child processes of the calling\n" | |
176 | "process, whose status has been collected (e.g., using @code{waitpid}).\n" | |
177 | "@item tms:cstime\n" | |
178 | "Similarly, the CPU times units used by the system on behalf of \n" | |
179 | "terminated child processes.\n" | |
180 | "@end table") | |
1bbd0b84 | 181 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 182 | { |
6afcd3b2 GH |
183 | struct tms t; |
184 | clock_t rv; | |
185 | ||
a8741caa | 186 | SCM result = scm_make_vector (SCM_MAKINUM(5), SCM_UNDEFINED); |
6afcd3b2 GH |
187 | rv = times (&t); |
188 | if (rv == -1) | |
1bbd0b84 | 189 | SCM_SYSERROR; |
6afcd3b2 GH |
190 | SCM_VELTS (result)[0] = scm_long2num (rv); |
191 | SCM_VELTS (result)[1] = scm_long2num (t.tms_utime); | |
192 | SCM_VELTS (result)[2] = scm_long2num (t.tms_stime); | |
193 | SCM_VELTS (result)[3] = scm_long2num (t.tms_cutime); | |
194 | SCM_VELTS (result)[4] = scm_long2num (t.tms_cstime); | |
195 | return result; | |
6afcd3b2 | 196 | } |
1bbd0b84 | 197 | #undef FUNC_NAME |
f25f761d | 198 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 199 | |
0f2d19dd JB |
200 | static long scm_my_base = 0; |
201 | ||
3b3b36dd | 202 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, |
1bbd0b84 | 203 | (void), |
b380b885 | 204 | "Returns the number of time units of processor time used by the interpreter.\n" |
a3c8b9fc | 205 | "Both \"system\" and \"user\" time are included but subprocesses are not.") |
1bbd0b84 | 206 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 207 | { |
19468eff | 208 | return scm_long2num(mytime()-scm_my_base); |
0f2d19dd | 209 | } |
1bbd0b84 | 210 | #undef FUNC_NAME |
0f2d19dd | 211 | |
3b3b36dd | 212 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 213 | (void), |
b380b885 | 214 | "Returns the number of seconds since 1970-01-01 00:00:00 UTC, excludingleap seconds.") |
1bbd0b84 | 215 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 216 | { |
19468eff GH |
217 | timet timv; |
218 | ||
219 | SCM_DEFER_INTS; | |
220 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 221 | SCM_SYSERROR; |
19468eff GH |
222 | SCM_ALLOW_INTS; |
223 | return scm_long2num((long) timv); | |
224 | } | |
1bbd0b84 | 225 | #undef FUNC_NAME |
19468eff | 226 | |
a1ec6916 | 227 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 228 | (void), |
a3c8b9fc MD |
229 | "Returns a pair containing the number of seconds and microseconds since\n" |
230 | "1970-01-01 00:00:00 UTC, excluding leap seconds. Note: whether true\n" | |
231 | "microsecond resolution is available depends on the operating system.") | |
1bbd0b84 | 232 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
233 | { |
234 | #ifdef HAVE_GETTIMEOFDAY | |
235 | struct timeval time; | |
236 | ||
237 | SCM_DEFER_INTS; | |
238 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 239 | SCM_SYSERROR; |
19468eff GH |
240 | SCM_ALLOW_INTS; |
241 | return scm_cons (scm_long2num ((long) time.tv_sec), | |
242 | scm_long2num ((long) time.tv_usec)); | |
243 | #else | |
244 | # ifdef HAVE_FTIME | |
245 | struct timeb time; | |
246 | ||
247 | ftime(&time); | |
248 | return scm_cons (scm_long2num ((long) time.time), | |
9a81afca | 249 | SCM_MAKINUM (time.millitm * 1000)); |
19468eff GH |
250 | # else |
251 | timet timv; | |
252 | ||
253 | SCM_DEFER_INTS; | |
254 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 255 | SCM_SYSERROR; |
19468eff GH |
256 | SCM_ALLOW_INTS; |
257 | return scm_cons (scm_long2num (timv), SCM_MAKINUM (0)); | |
258 | # endif | |
259 | #endif | |
260 | } | |
1bbd0b84 | 261 | #undef FUNC_NAME |
19468eff GH |
262 | |
263 | static SCM | |
264 | filltime (struct tm *bd_time, int zoff, char *zname) | |
265 | { | |
a8741caa | 266 | SCM result = scm_make_vector (SCM_MAKINUM(11), SCM_UNDEFINED); |
19468eff GH |
267 | |
268 | SCM_VELTS (result)[0] = SCM_MAKINUM (bd_time->tm_sec); | |
269 | SCM_VELTS (result)[1] = SCM_MAKINUM (bd_time->tm_min); | |
270 | SCM_VELTS (result)[2] = SCM_MAKINUM (bd_time->tm_hour); | |
271 | SCM_VELTS (result)[3] = SCM_MAKINUM (bd_time->tm_mday); | |
272 | SCM_VELTS (result)[4] = SCM_MAKINUM (bd_time->tm_mon); | |
273 | SCM_VELTS (result)[5] = SCM_MAKINUM (bd_time->tm_year); | |
274 | SCM_VELTS (result)[6] = SCM_MAKINUM (bd_time->tm_wday); | |
275 | SCM_VELTS (result)[7] = SCM_MAKINUM (bd_time->tm_yday); | |
276 | SCM_VELTS (result)[8] = SCM_MAKINUM (bd_time->tm_isdst); | |
277 | SCM_VELTS (result)[9] = SCM_MAKINUM (zoff); | |
b9525b92 | 278 | SCM_VELTS (result)[10] = zname ? scm_makfrom0str (zname) : SCM_BOOL_F; |
19468eff GH |
279 | return result; |
280 | } | |
281 | ||
ef9ff3fd GH |
282 | static char tzvar[3] = "TZ"; |
283 | extern char ** environ; | |
284 | ||
38c1d3c4 GH |
285 | /* if zone is set, create a temporary environment with only a TZ |
286 | string. other threads or interrupt handlers shouldn't be allowed | |
287 | to run until the corresponding restorezone is called. hence the use | |
288 | of a static variable for tmpenv is no big deal. */ | |
ef9ff3fd | 289 | static char ** |
3eeba8d4 | 290 | setzone (SCM zone, int pos, const char *subr) |
b9525b92 | 291 | { |
ef9ff3fd | 292 | char **oldenv = 0; |
b9525b92 GH |
293 | |
294 | if (!SCM_UNBNDP (zone)) | |
295 | { | |
ef9ff3fd | 296 | static char *tmpenv[2]; |
b9525b92 GH |
297 | char *buf; |
298 | ||
0c95b57d | 299 | SCM_ASSERT (SCM_ROSTRINGP (zone), zone, pos, subr); |
89958ad0 | 300 | SCM_COERCE_SUBSTR (zone); |
ef9ff3fd GH |
301 | buf = scm_must_malloc (SCM_LENGTH (zone) + sizeof (tzvar) + 1, |
302 | subr); | |
303 | sprintf (buf, "%s=%s", tzvar, SCM_ROCHARS (zone)); | |
304 | oldenv = environ; | |
305 | tmpenv[0] = buf; | |
306 | tmpenv[1] = 0; | |
307 | environ = tmpenv; | |
b9525b92 | 308 | } |
ef9ff3fd | 309 | return oldenv; |
b9525b92 GH |
310 | } |
311 | ||
312 | static void | |
3eeba8d4 | 313 | restorezone (SCM zone, char **oldenv, const char *subr) |
b9525b92 GH |
314 | { |
315 | if (!SCM_UNBNDP (zone)) | |
316 | { | |
ef9ff3fd GH |
317 | scm_must_free (environ[0]); |
318 | environ = oldenv; | |
38c1d3c4 GH |
319 | #ifdef HAVE_TZSET |
320 | /* for the possible benefit of user code linked with libguile. */ | |
b9525b92 | 321 | tzset(); |
38c1d3c4 | 322 | #endif |
b9525b92 GH |
323 | } |
324 | } | |
325 | ||
a1ec6916 | 326 | SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0, |
1bbd0b84 | 327 | (SCM time, SCM zone), |
a3c8b9fc MD |
328 | "Returns an object representing the broken down components of @var{time},\n" |
329 | "an integer like the one returned by @code{current-time}. The time zone\n" | |
330 | "for the calculation is optionally specified by @var{zone} (a string),\n" | |
331 | "otherwise the @code{TZ} environment variable or the system default is\n" | |
332 | "used.") | |
1bbd0b84 | 333 | #define FUNC_NAME s_scm_localtime |
19468eff GH |
334 | { |
335 | timet itime; | |
4edc089c | 336 | struct tm *ltptr, lt, *utc; |
19468eff GH |
337 | SCM result; |
338 | int zoff; | |
339 | char *zname = 0; | |
ef9ff3fd | 340 | char **oldenv; |
19468eff GH |
341 | int err; |
342 | ||
1bbd0b84 | 343 | itime = SCM_NUM2LONG (1,time); |
38c1d3c4 GH |
344 | |
345 | /* deferring interupts is essential since a) setzone may install a temporary | |
346 | environment b) localtime uses a static buffer. */ | |
19468eff | 347 | SCM_DEFER_INTS; |
1bbd0b84 | 348 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
349 | #ifdef LOCALTIME_CACHE |
350 | tzset (); | |
351 | #endif | |
4edc089c | 352 | ltptr = localtime (&itime); |
19468eff | 353 | err = errno; |
4edc089c | 354 | if (ltptr) |
19468eff | 355 | { |
4d3bacdd | 356 | const char *ptr; |
ef9ff3fd | 357 | |
43ff3170 GH |
358 | /* copy zone name before calling gmtime or restoring zone. */ |
359 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 360 | ptr = ltptr->tm_zone; |
43ff3170 | 361 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 362 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
363 | #else |
364 | ptr = ""; | |
b9525b92 | 365 | #endif |
1bbd0b84 | 366 | zname = SCM_MUST_MALLOC (strlen (ptr) + 1); |
ef9ff3fd | 367 | strcpy (zname, ptr); |
19468eff | 368 | } |
ef9ff3fd GH |
369 | /* the struct is copied in case localtime and gmtime share a buffer. */ |
370 | if (ltptr) | |
371 | lt = *ltptr; | |
372 | utc = gmtime (&itime); | |
373 | if (utc == NULL) | |
374 | err = errno; | |
1bbd0b84 | 375 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 376 | /* delayed until zone has been restored. */ |
19468eff | 377 | errno = err; |
4edc089c | 378 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 379 | SCM_SYSERROR; |
19468eff GH |
380 | |
381 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
382 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
383 | + utc->tm_sec - lt.tm_sec; | |
384 | if (utc->tm_year < lt.tm_year) | |
19468eff | 385 | zoff -= 24 * 60 * 60; |
4edc089c | 386 | else if (utc->tm_year > lt.tm_year) |
19468eff | 387 | zoff += 24 * 60 * 60; |
4edc089c | 388 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 389 | zoff -= 24 * 60 * 60; |
4edc089c | 390 | else if (utc->tm_yday > lt.tm_yday) |
19468eff GH |
391 | zoff += 24 * 60 * 60; |
392 | ||
4edc089c | 393 | result = filltime (<, zoff, zname); |
19468eff | 394 | SCM_ALLOW_INTS; |
ef9ff3fd | 395 | scm_must_free (zname); |
19468eff GH |
396 | return result; |
397 | } | |
1bbd0b84 | 398 | #undef FUNC_NAME |
19468eff | 399 | |
a1ec6916 | 400 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 401 | (SCM time), |
a3c8b9fc MD |
402 | "Returns an object representing the broken down components of @var{time},\n" |
403 | "an integer like the one returned by @code{current-time}. The values\n" | |
404 | "are calculated for UTC.") | |
1bbd0b84 | 405 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
406 | { |
407 | timet itime; | |
408 | struct tm *bd_time; | |
409 | SCM result; | |
410 | ||
1bbd0b84 | 411 | itime = SCM_NUM2LONG (1,time); |
19468eff GH |
412 | SCM_DEFER_INTS; |
413 | bd_time = gmtime (&itime); | |
414 | if (bd_time == NULL) | |
1bbd0b84 | 415 | SCM_SYSERROR; |
19468eff GH |
416 | result = filltime (bd_time, 0, "GMT"); |
417 | SCM_ALLOW_INTS; | |
418 | return result; | |
419 | } | |
1bbd0b84 | 420 | #undef FUNC_NAME |
19468eff | 421 | |
b9525b92 GH |
422 | /* copy time components from a Scheme object to a struct tm. */ |
423 | static void | |
3eeba8d4 | 424 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 425 | { |
55a7fc62 GH |
426 | SCM *velts; |
427 | int i; | |
428 | ||
0c95b57d | 429 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
55a7fc62 | 430 | && SCM_LENGTH (sbd_time) == 11, |
b9525b92 | 431 | sbd_time, pos, subr); |
55a7fc62 GH |
432 | velts = SCM_VELTS (sbd_time); |
433 | for (i = 0; i < 10; i++) | |
434 | { | |
435 | SCM_ASSERT (SCM_INUMP (velts[i]), sbd_time, pos, subr); | |
436 | } | |
0c95b57d | 437 | SCM_ASSERT (SCM_FALSEP (velts[10]) || SCM_STRINGP (velts[10]), |
55a7fc62 GH |
438 | sbd_time, pos, subr); |
439 | ||
440 | lt->tm_sec = SCM_INUM (velts[0]); | |
441 | lt->tm_min = SCM_INUM (velts[1]); | |
442 | lt->tm_hour = SCM_INUM (velts[2]); | |
443 | lt->tm_mday = SCM_INUM (velts[3]); | |
444 | lt->tm_mon = SCM_INUM (velts[4]); | |
445 | lt->tm_year = SCM_INUM (velts[5]); | |
446 | lt->tm_wday = SCM_INUM (velts[6]); | |
447 | lt->tm_yday = SCM_INUM (velts[7]); | |
448 | lt->tm_isdst = SCM_INUM (velts[8]); | |
c7abe4f3 | 449 | #ifdef HAVE_TM_ZONE |
55a7fc62 GH |
450 | lt->tm_gmtoff = SCM_INUM (velts[9]); |
451 | if (SCM_FALSEP (velts[10])) | |
452 | lt->tm_zone = NULL; | |
453 | else | |
454 | lt->tm_zone = SCM_CHARS (velts[10]); | |
c7abe4f3 | 455 | #endif |
b9525b92 GH |
456 | } |
457 | ||
a1ec6916 | 458 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 459 | (SCM sbd_time, SCM zone), |
a3c8b9fc MD |
460 | "@var{bd-time} is an object representing broken down time and @code{zone}\n" |
461 | "is an optional time zone specifier (otherwise the TZ environment variable\n" | |
462 | "or the system default is used).\n\n" | |
463 | "Returns a pair: the CAR is a corresponding\n" | |
464 | "integer time value like that returned\n" | |
465 | "by @code{current-time}; the CDR is a broken down time object, similar to\n" | |
466 | "as @var{bd-time} but with normalized values.") | |
1bbd0b84 | 467 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
468 | { |
469 | timet itime; | |
470 | struct tm lt, *utc; | |
471 | SCM result; | |
472 | int zoff; | |
473 | char *zname = 0; | |
ef9ff3fd | 474 | char **oldenv; |
b9525b92 GH |
475 | int err; |
476 | ||
1bbd0b84 | 477 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
19468eff GH |
478 | |
479 | SCM_DEFER_INTS; | |
1bbd0b84 | 480 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
481 | #ifdef LOCALTIME_CACHE |
482 | tzset (); | |
483 | #endif | |
19468eff | 484 | itime = mktime (<); |
b9525b92 | 485 | err = errno; |
19468eff | 486 | |
b9525b92 GH |
487 | if (itime != -1) |
488 | { | |
4d3bacdd | 489 | const char *ptr; |
ef9ff3fd | 490 | |
43ff3170 GH |
491 | /* copy zone name before calling gmtime or restoring the zone. */ |
492 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 493 | ptr = lt.tm_zone; |
43ff3170 | 494 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 495 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
496 | #else |
497 | ptr = ""; | |
b9525b92 | 498 | #endif |
1bbd0b84 | 499 | zname = SCM_MUST_MALLOC (strlen (ptr) + 1); |
ef9ff3fd | 500 | strcpy (zname, ptr); |
b9525b92 | 501 | } |
ef9ff3fd GH |
502 | |
503 | /* get timezone offset in seconds west of UTC. */ | |
504 | utc = gmtime (&itime); | |
505 | if (utc == NULL) | |
506 | err = errno; | |
507 | ||
1bbd0b84 | 508 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
509 | /* delayed until zone has been restored. */ |
510 | errno = err; | |
511 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 512 | SCM_SYSERROR; |
b9525b92 | 513 | |
19468eff GH |
514 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
515 | + utc->tm_sec - lt.tm_sec; | |
516 | if (utc->tm_year < lt.tm_year) | |
517 | zoff -= 24 * 60 * 60; | |
518 | else if (utc->tm_year > lt.tm_year) | |
519 | zoff += 24 * 60 * 60; | |
520 | else if (utc->tm_yday < lt.tm_yday) | |
521 | zoff -= 24 * 60 * 60; | |
522 | else if (utc->tm_yday > lt.tm_yday) | |
523 | zoff += 24 * 60 * 60; | |
524 | ||
19468eff GH |
525 | result = scm_cons (scm_long2num ((long) itime), |
526 | filltime (<, zoff, zname)); | |
527 | SCM_ALLOW_INTS; | |
ef9ff3fd | 528 | scm_must_free (zname); |
19468eff | 529 | return result; |
0f2d19dd | 530 | } |
1bbd0b84 | 531 | #undef FUNC_NAME |
0f2d19dd | 532 | |
38c1d3c4 | 533 | #ifdef HAVE_TZSET |
a1ec6916 | 534 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 535 | (void), |
a3c8b9fc MD |
536 | "Initialize the timezone from the TZ environment variable\n" |
537 | "or the system default. It's not usually necessary to call this procedure\n" | |
538 | "since it's done automatically by other procedures that depend on the\n" | |
539 | "timezone.") | |
1bbd0b84 | 540 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 541 | { |
19468eff GH |
542 | tzset(); |
543 | return SCM_UNSPECIFIED; | |
0f2d19dd | 544 | } |
1bbd0b84 | 545 | #undef FUNC_NAME |
38c1d3c4 | 546 | #endif /* HAVE_TZSET */ |
0f2d19dd | 547 | |
a1ec6916 | 548 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 549 | (SCM format, SCM stime), |
a3c8b9fc MD |
550 | "Formats a time specification @var{time} using @var{template}. @var{time}\n" |
551 | "is an object with time components in the form returned by @code{localtime}\n" | |
552 | "or @code{gmtime}. @var{template} is a string which can include formatting\n" | |
553 | "specifications introduced by a @code{%} character. The formatting of\n" | |
554 | "month and day names is dependent on the current locale. The value returned\n" | |
555 | "is the formatted string.\n" | |
556 | "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 557 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
558 | { |
559 | struct tm t; | |
560 | ||
561 | char *tbuf; | |
562 | int size = 50; | |
563 | char *fmt; | |
564 | int len; | |
ef9ff3fd | 565 | SCM result; |
b9525b92 | 566 | |
3b3b36dd | 567 | SCM_VALIDATE_ROSTRING (1,format); |
1bbd0b84 | 568 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 569 | |
89958ad0 | 570 | SCM_COERCE_SUBSTR (format); |
b9525b92 GH |
571 | fmt = SCM_ROCHARS (format); |
572 | len = SCM_ROLENGTH (format); | |
573 | ||
1bbd0b84 | 574 | tbuf = SCM_MUST_MALLOC (size); |
38c1d3c4 GH |
575 | #ifdef LOCALTIME_CACHE |
576 | tzset (); | |
577 | #endif | |
b9525b92 GH |
578 | while ((len = strftime (tbuf, size, fmt, &t)) == size) |
579 | { | |
580 | scm_must_free (tbuf); | |
581 | size *= 2; | |
1bbd0b84 | 582 | tbuf = SCM_MUST_MALLOC (size); |
b9525b92 | 583 | } |
ef9ff3fd GH |
584 | result = scm_makfromstr (tbuf, len, 0); |
585 | scm_must_free (tbuf); | |
586 | return result; | |
b9525b92 | 587 | } |
1bbd0b84 | 588 | #undef FUNC_NAME |
b9525b92 | 589 | |
f25f761d | 590 | #ifdef HAVE_STRPTIME |
a1ec6916 | 591 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 592 | (SCM format, SCM string), |
a3c8b9fc MD |
593 | "Performs the reverse action to @code{strftime}, parsing @var{string}\n" |
594 | "according to the specification supplied in @var{template}. The\n" | |
595 | "interpretation of month and day names is dependent on the current\n" | |
596 | "locale. The\n" | |
597 | "value returned is a pair. The CAR has an object with time components \n" | |
598 | "in the form returned by @code{localtime} or @code{gmtime},\n" | |
599 | "but the time zone components\n" | |
600 | "are not usefully set.\n" | |
601 | "The CDR reports the number of characters from @var{string} which\n" | |
602 | "vwere used for the conversion.") | |
1bbd0b84 | 603 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 604 | { |
b9525b92 GH |
605 | struct tm t; |
606 | char *fmt, *str, *rest; | |
607 | ||
3b3b36dd GB |
608 | SCM_VALIDATE_ROSTRING (1,format); |
609 | SCM_VALIDATE_ROSTRING (2,string); | |
b9525b92 | 610 | |
89958ad0 JB |
611 | SCM_COERCE_SUBSTR (format); |
612 | SCM_COERCE_SUBSTR (string); | |
b9525b92 GH |
613 | fmt = SCM_ROCHARS (format); |
614 | str = SCM_ROCHARS (string); | |
615 | ||
616 | /* initialize the struct tm */ | |
617 | #define tm_init(field) t.field = 0 | |
618 | tm_init (tm_sec); | |
619 | tm_init (tm_min); | |
620 | tm_init (tm_hour); | |
621 | tm_init (tm_mday); | |
622 | tm_init (tm_mon); | |
623 | tm_init (tm_year); | |
624 | tm_init (tm_wday); | |
625 | tm_init (tm_yday); | |
626 | #undef tm_init | |
627 | ||
628 | t.tm_isdst = -1; | |
629 | SCM_DEFER_INTS; | |
630 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
1bbd0b84 | 631 | SCM_SYSERROR; |
b9525b92 GH |
632 | |
633 | SCM_ALLOW_INTS; | |
634 | return scm_cons (filltime (&t, 0, NULL), SCM_MAKINUM (rest - str)); | |
b9525b92 | 635 | } |
1bbd0b84 | 636 | #undef FUNC_NAME |
f25f761d | 637 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 638 | |
0f2d19dd JB |
639 | void |
640 | scm_init_stime() | |
0f2d19dd JB |
641 | { |
642 | scm_sysintern("internal-time-units-per-second", | |
19468eff | 643 | scm_long2num((long)CLKTCK)); |
0f2d19dd JB |
644 | |
645 | #ifdef HAVE_FTIME | |
646 | if (!scm_your_base.time) ftime(&scm_your_base); | |
647 | #else | |
648 | if (!scm_your_base) time(&scm_your_base); | |
649 | #endif | |
650 | ||
651 | if (!scm_my_base) scm_my_base = mytime(); | |
652 | ||
876c87ce | 653 | scm_add_feature ("current-time"); |
0f2d19dd JB |
654 | #include "stime.x" |
655 | } | |
656 | ||
89e00824 ML |
657 | |
658 | /* | |
659 | Local Variables: | |
660 | c-file-style: "gnu" | |
661 | End: | |
662 | */ |