Commit | Line | Data |
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f40771d8 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004 Free Software Foundation, Inc. |
1c299a6b | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
1c299a6b | 7 | * |
73be1d9e | 8 | * This library is distributed in the hope that it will be useful, |
0f2d19dd | 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
1c299a6b | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
3c61e80f | 21 | #define _GNU_SOURCE /* ask glibc for everything, in particular strptime */ |
edea856c | 22 | #ifndef __MINGW32__ |
95f31774 | 23 | #define _POSIX_C_SOURCE 199506L /* for gmtime_r prototype */ |
edea856c | 24 | #endif |
3c61e80f | 25 | |
3cf2f52d RB |
26 | #if HAVE_CONFIG_H |
27 | # include <config.h> | |
28 | #endif | |
29 | ||
0f2d19dd | 30 | #include <stdio.h> |
e6e2e95a MD |
31 | #include <errno.h> |
32 | ||
a0599745 MD |
33 | #include "libguile/_scm.h" |
34 | #include "libguile/feature.h" | |
35 | #include "libguile/strings.h" | |
36 | #include "libguile/vectors.h" | |
cc95e00a | 37 | #include "libguile/dynwind.h" |
20e6290e | 38 | |
a0599745 MD |
39 | #include "libguile/validate.h" |
40 | #include "libguile/stime.h" | |
20e6290e | 41 | |
0f2d19dd JB |
42 | #ifdef HAVE_UNISTD_H |
43 | #include <unistd.h> | |
44 | #endif | |
45 | ||
46 | \f | |
47 | # ifdef HAVE_SYS_TYPES_H | |
48 | # include <sys/types.h> | |
49 | # endif | |
50 | ||
a15e6dcc MV |
51 | #ifdef HAVE_STRING_H |
52 | #include <string.h> | |
53 | #endif | |
54 | ||
b1978258 GH |
55 | #ifdef HAVE_SYS_TIMES_H |
56 | # include <sys/times.h> | |
57 | #endif | |
58 | ||
59 | #ifdef HAVE_SYS_TIMEB_H | |
60 | # include <sys/timeb.h> | |
61 | #endif | |
0f2d19dd | 62 | |
eb7e1603 KR |
63 | #if HAVE_CRT_EXTERNS_H |
64 | #include <crt_externs.h> /* for Darwin _NSGetEnviron */ | |
65 | #endif | |
66 | ||
b9525b92 GH |
67 | #ifndef tzname /* For SGI. */ |
68 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
69 | #endif | |
79dcdf51 MV |
70 | #if defined (__MINGW32__) |
71 | # define tzname _tzname | |
72 | #endif | |
b9525b92 | 73 | |
3c61e80f | 74 | #if ! HAVE_DECL_STRPTIME |
4d3bacdd JB |
75 | extern char *strptime (); |
76 | #endif | |
77 | ||
0f2d19dd JB |
78 | #ifdef __STDC__ |
79 | # define timet time_t | |
80 | #else | |
81 | # define timet long | |
82 | #endif | |
83 | ||
eb7e1603 KR |
84 | extern char ** environ; |
85 | ||
86 | /* On Apple Darwin in a shared library there's no "environ" to access | |
87 | directly, instead the address of that variable must be obtained with | |
88 | _NSGetEnviron(). */ | |
89 | #if HAVE__NSGETENVIRON && defined (PIC) | |
90 | #define environ (*_NSGetEnviron()) | |
91 | #endif | |
92 | ||
93 | ||
0f2d19dd | 94 | #ifdef HAVE_TIMES |
0f2d19dd | 95 | static |
1c299a6b | 96 | timet mytime() |
0f2d19dd JB |
97 | { |
98 | struct tms time_buffer; | |
99 | times(&time_buffer); | |
100 | return time_buffer.tms_utime + time_buffer.tms_stime; | |
101 | } | |
102 | #else | |
103 | # ifdef LACK_CLOCK | |
756414cf | 104 | # define mytime() ((time((timet*)0) - scm_your_base) * SCM_TIME_UNITS_PER_SECOND) |
0f2d19dd JB |
105 | # else |
106 | # define mytime clock | |
107 | # endif | |
108 | #endif | |
109 | ||
0f2d19dd | 110 | #ifdef HAVE_FTIME |
0f2d19dd | 111 | struct timeb scm_your_base = {0}; |
b450f070 GB |
112 | #else |
113 | timet scm_your_base = 0; | |
114 | #endif | |
1bbd0b84 | 115 | |
1c299a6b | 116 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 117 | (), |
1e6808ea MG |
118 | "Return the number of time units since the interpreter was\n" |
119 | "started.") | |
1bbd0b84 | 120 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd | 121 | { |
b450f070 | 122 | #ifdef HAVE_FTIME |
0f2d19dd | 123 | struct timeb time_buffer; |
55c4d089 JB |
124 | |
125 | SCM tmp; | |
126 | ftime (&time_buffer); | |
0f2d19dd | 127 | time_buffer.time -= scm_your_base.time; |
b9bd8526 | 128 | tmp = scm_from_long (time_buffer.millitm - scm_your_base.millitm); |
55c4d089 | 129 | tmp = scm_sum (tmp, |
e11e83f3 MV |
130 | scm_product (scm_from_int (1000), |
131 | scm_from_int (time_buffer.time))); | |
b9bd8526 MV |
132 | return scm_quotient (scm_product (tmp, |
133 | scm_from_int (SCM_TIME_UNITS_PER_SECOND)), | |
e11e83f3 | 134 | scm_from_int (1000)); |
0f2d19dd | 135 | #else |
b9bd8526 MV |
136 | return scm_from_long ((time((timet*)0) - scm_your_base) |
137 | * (int)SCM_TIME_UNITS_PER_SECOND); | |
b450f070 | 138 | #endif /* HAVE_FTIME */ |
0f2d19dd | 139 | } |
1bbd0b84 GB |
140 | #undef FUNC_NAME |
141 | ||
0f2d19dd | 142 | |
f25f761d | 143 | #ifdef HAVE_TIMES |
1c299a6b | 144 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 145 | (void), |
1e6808ea MG |
146 | "Return an object with information about real and processor\n" |
147 | "time. The following procedures accept such an object as an\n" | |
148 | "argument and return a selected component:\n" | |
149 | "\n" | |
b380b885 MD |
150 | "@table @code\n" |
151 | "@item tms:clock\n" | |
152 | "The current real time, expressed as time units relative to an\n" | |
153 | "arbitrary base.\n" | |
154 | "@item tms:utime\n" | |
155 | "The CPU time units used by the calling process.\n" | |
156 | "@item tms:stime\n" | |
1e6808ea MG |
157 | "The CPU time units used by the system on behalf of the calling\n" |
158 | "process.\n" | |
b380b885 | 159 | "@item tms:cutime\n" |
1e6808ea MG |
160 | "The CPU time units used by terminated child processes of the\n" |
161 | "calling process, whose status has been collected (e.g., using\n" | |
162 | "@code{waitpid}).\n" | |
b380b885 | 163 | "@item tms:cstime\n" |
1e6808ea | 164 | "Similarly, the CPU times units used by the system on behalf of\n" |
b380b885 MD |
165 | "terminated child processes.\n" |
166 | "@end table") | |
1bbd0b84 | 167 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 168 | { |
6afcd3b2 GH |
169 | struct tms t; |
170 | clock_t rv; | |
171 | ||
00ffa0e7 | 172 | SCM result = scm_c_make_vector (5, SCM_UNDEFINED); |
6afcd3b2 GH |
173 | rv = times (&t); |
174 | if (rv == -1) | |
1bbd0b84 | 175 | SCM_SYSERROR; |
b9bd8526 MV |
176 | SCM_VECTOR_SET (result, 0, scm_from_long (rv)); |
177 | SCM_VECTOR_SET (result, 1, scm_from_long (t.tms_utime)); | |
178 | SCM_VECTOR_SET (result, 2, scm_from_long (t.tms_stime)); | |
179 | SCM_VECTOR_SET (result ,3, scm_from_long (t.tms_cutime)); | |
180 | SCM_VECTOR_SET (result, 4, scm_from_long (t.tms_cstime)); | |
6afcd3b2 | 181 | return result; |
6afcd3b2 | 182 | } |
1bbd0b84 | 183 | #undef FUNC_NAME |
f25f761d | 184 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 185 | |
0f2d19dd JB |
186 | static long scm_my_base = 0; |
187 | ||
1c299a6b ML |
188 | long |
189 | scm_c_get_internal_run_time () | |
190 | { | |
191 | return mytime () - scm_my_base; | |
192 | } | |
193 | ||
194 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, | |
1bbd0b84 | 195 | (void), |
1e6808ea MG |
196 | "Return the number of time units of processor time used by the\n" |
197 | "interpreter. Both @emph{system} and @emph{user} time are\n" | |
198 | "included but subprocesses are not.") | |
1bbd0b84 | 199 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 200 | { |
b9bd8526 | 201 | return scm_from_long (scm_c_get_internal_run_time ()); |
0f2d19dd | 202 | } |
1bbd0b84 | 203 | #undef FUNC_NAME |
0f2d19dd | 204 | |
f40771d8 KR |
205 | /* For reference, note that current-time and gettimeofday both should be |
206 | protected against setzone/restorezone changes in another thread, since on | |
207 | DOS the system time is normally kept as local time, which means TZ | |
208 | affects the return from current-time and gettimeofday. Not sure if DJGPP | |
209 | etc actually has concurrent multi-threading, but it seems prudent not to | |
210 | make assumptions about this. */ | |
211 | ||
1c299a6b | 212 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 213 | (void), |
1e6808ea MG |
214 | "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n" |
215 | "excluding leap seconds.") | |
1bbd0b84 | 216 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 217 | { |
19468eff GH |
218 | timet timv; |
219 | ||
220 | SCM_DEFER_INTS; | |
221 | if ((timv = time (0)) == -1) | |
2d99b584 | 222 | SCM_MISC_ERROR ("current time not available", SCM_EOL); |
19468eff | 223 | SCM_ALLOW_INTS; |
b9bd8526 | 224 | return scm_from_long (timv); |
19468eff | 225 | } |
1bbd0b84 | 226 | #undef FUNC_NAME |
19468eff | 227 | |
1c299a6b | 228 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 229 | (void), |
1e6808ea MG |
230 | "Return a pair containing the number of seconds and microseconds\n" |
231 | "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n" | |
232 | "whether true microsecond resolution is available depends on the\n" | |
233 | "operating system.") | |
1bbd0b84 | 234 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
235 | { |
236 | #ifdef HAVE_GETTIMEOFDAY | |
237 | struct timeval time; | |
238 | ||
239 | SCM_DEFER_INTS; | |
240 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 241 | SCM_SYSERROR; |
19468eff | 242 | SCM_ALLOW_INTS; |
b9bd8526 MV |
243 | return scm_cons (scm_from_long (time.tv_sec), |
244 | scm_from_long (time.tv_usec)); | |
19468eff GH |
245 | #else |
246 | # ifdef HAVE_FTIME | |
247 | struct timeb time; | |
248 | ||
249 | ftime(&time); | |
b9bd8526 | 250 | return scm_cons (scm_from_long (time.time), |
e11e83f3 | 251 | scm_from_int (time.millitm * 1000)); |
19468eff GH |
252 | # else |
253 | timet timv; | |
1c299a6b | 254 | |
19468eff GH |
255 | SCM_DEFER_INTS; |
256 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 257 | SCM_SYSERROR; |
19468eff | 258 | SCM_ALLOW_INTS; |
b9bd8526 | 259 | return scm_cons (scm_from_long (timv), scm_from_int (0)); |
19468eff GH |
260 | # endif |
261 | #endif | |
262 | } | |
1bbd0b84 | 263 | #undef FUNC_NAME |
19468eff GH |
264 | |
265 | static SCM | |
d6d9e957 | 266 | filltime (struct tm *bd_time, int zoff, const char *zname) |
19468eff | 267 | { |
00ffa0e7 | 268 | SCM result = scm_c_make_vector (11, SCM_UNDEFINED); |
19468eff | 269 | |
e11e83f3 MV |
270 | SCM_VECTOR_SET (result,0, scm_from_int (bd_time->tm_sec)); |
271 | SCM_VECTOR_SET (result,1, scm_from_int (bd_time->tm_min)); | |
272 | SCM_VECTOR_SET (result,2, scm_from_int (bd_time->tm_hour)); | |
273 | SCM_VECTOR_SET (result,3, scm_from_int (bd_time->tm_mday)); | |
274 | SCM_VECTOR_SET (result,4, scm_from_int (bd_time->tm_mon)); | |
275 | SCM_VECTOR_SET (result,5, scm_from_int (bd_time->tm_year)); | |
276 | SCM_VECTOR_SET (result,6, scm_from_int (bd_time->tm_wday)); | |
277 | SCM_VECTOR_SET (result,7, scm_from_int (bd_time->tm_yday)); | |
278 | SCM_VECTOR_SET (result,8, scm_from_int (bd_time->tm_isdst)); | |
279 | SCM_VECTOR_SET (result,9, scm_from_int (zoff)); | |
cc95e00a MV |
280 | SCM_VECTOR_SET (result,10, (zname |
281 | ? scm_from_locale_string (zname) | |
282 | : SCM_BOOL_F)); | |
19468eff GH |
283 | return result; |
284 | } | |
285 | ||
ef9ff3fd | 286 | static char tzvar[3] = "TZ"; |
ef9ff3fd | 287 | |
38c1d3c4 GH |
288 | /* if zone is set, create a temporary environment with only a TZ |
289 | string. other threads or interrupt handlers shouldn't be allowed | |
290 | to run until the corresponding restorezone is called. hence the use | |
291 | of a static variable for tmpenv is no big deal. */ | |
ef9ff3fd | 292 | static char ** |
3eeba8d4 | 293 | setzone (SCM zone, int pos, const char *subr) |
b9525b92 | 294 | { |
ef9ff3fd | 295 | char **oldenv = 0; |
b9525b92 GH |
296 | |
297 | if (!SCM_UNBNDP (zone)) | |
298 | { | |
ef9ff3fd | 299 | static char *tmpenv[2]; |
b9525b92 | 300 | char *buf; |
7f9994d9 MV |
301 | size_t zone_len; |
302 | ||
303 | zone_len = scm_to_locale_stringbuf (zone, NULL, 0); | |
304 | buf = scm_malloc (zone_len + sizeof (tzvar) + 1); | |
305 | strcpy (buf, tzvar); | |
306 | buf[sizeof(tzvar)-1] = '='; | |
307 | scm_to_locale_stringbuf (zone, buf+sizeof(tzvar), zone_len); | |
308 | buf[sizeof(tzvar)+zone_len] = '\0'; | |
ef9ff3fd GH |
309 | oldenv = environ; |
310 | tmpenv[0] = buf; | |
311 | tmpenv[1] = 0; | |
312 | environ = tmpenv; | |
b9525b92 | 313 | } |
ef9ff3fd | 314 | return oldenv; |
b9525b92 GH |
315 | } |
316 | ||
317 | static void | |
e81d98ec | 318 | restorezone (SCM zone, char **oldenv, const char *subr SCM_UNUSED) |
b9525b92 GH |
319 | { |
320 | if (!SCM_UNBNDP (zone)) | |
321 | { | |
4c9419ac | 322 | free (environ[0]); |
ef9ff3fd | 323 | environ = oldenv; |
38c1d3c4 GH |
324 | #ifdef HAVE_TZSET |
325 | /* for the possible benefit of user code linked with libguile. */ | |
b9525b92 | 326 | tzset(); |
38c1d3c4 | 327 | #endif |
b9525b92 GH |
328 | } |
329 | } | |
330 | ||
1c299a6b | 331 | SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0, |
1bbd0b84 | 332 | (SCM time, SCM zone), |
1e6808ea MG |
333 | "Return an object representing the broken down components of\n" |
334 | "@var{time}, an integer like the one returned by\n" | |
335 | "@code{current-time}. The time zone for the calculation is\n" | |
336 | "optionally specified by @var{zone} (a string), otherwise the\n" | |
337 | "@code{TZ} environment variable or the system default is used.") | |
1bbd0b84 | 338 | #define FUNC_NAME s_scm_localtime |
19468eff GH |
339 | { |
340 | timet itime; | |
4edc089c | 341 | struct tm *ltptr, lt, *utc; |
19468eff GH |
342 | SCM result; |
343 | int zoff; | |
344 | char *zname = 0; | |
ef9ff3fd | 345 | char **oldenv; |
19468eff GH |
346 | int err; |
347 | ||
e4b265d8 | 348 | itime = SCM_NUM2LONG (1, time); |
38c1d3c4 GH |
349 | |
350 | /* deferring interupts is essential since a) setzone may install a temporary | |
351 | environment b) localtime uses a static buffer. */ | |
19468eff | 352 | SCM_DEFER_INTS; |
1bbd0b84 | 353 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
354 | #ifdef LOCALTIME_CACHE |
355 | tzset (); | |
356 | #endif | |
73ae3b4c KR |
357 | /* POSIX says localtime sets errno, but C99 doesn't say that. |
358 | Give a sensible default value in case localtime doesn't set it. */ | |
359 | errno = EINVAL; | |
4edc089c | 360 | ltptr = localtime (&itime); |
19468eff | 361 | err = errno; |
4edc089c | 362 | if (ltptr) |
19468eff | 363 | { |
4d3bacdd | 364 | const char *ptr; |
ef9ff3fd | 365 | |
43ff3170 GH |
366 | /* copy zone name before calling gmtime or restoring zone. */ |
367 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 368 | ptr = ltptr->tm_zone; |
43ff3170 | 369 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 370 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
371 | #else |
372 | ptr = ""; | |
b9525b92 | 373 | #endif |
4c9419ac | 374 | zname = scm_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; | |
73ae3b4c KR |
380 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
381 | Give a sensible default value in case gmtime doesn't set it. */ | |
382 | errno = EINVAL; | |
ef9ff3fd GH |
383 | utc = gmtime (&itime); |
384 | if (utc == NULL) | |
385 | err = errno; | |
1bbd0b84 | 386 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 387 | /* delayed until zone has been restored. */ |
19468eff | 388 | errno = err; |
4edc089c | 389 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 390 | SCM_SYSERROR; |
19468eff GH |
391 | |
392 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
393 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
394 | + utc->tm_sec - lt.tm_sec; | |
395 | if (utc->tm_year < lt.tm_year) | |
19468eff | 396 | zoff -= 24 * 60 * 60; |
4edc089c | 397 | else if (utc->tm_year > lt.tm_year) |
19468eff | 398 | zoff += 24 * 60 * 60; |
4edc089c | 399 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 400 | zoff -= 24 * 60 * 60; |
4edc089c | 401 | else if (utc->tm_yday > lt.tm_yday) |
19468eff | 402 | zoff += 24 * 60 * 60; |
1c299a6b | 403 | |
4edc089c | 404 | result = filltime (<, zoff, zname); |
19468eff | 405 | SCM_ALLOW_INTS; |
4c9419ac MV |
406 | if (zname) |
407 | free (zname); | |
19468eff GH |
408 | return result; |
409 | } | |
1bbd0b84 | 410 | #undef FUNC_NAME |
19468eff | 411 | |
45198ffb KR |
412 | /* tm_zone is normally a pointer, not an array within struct tm, so we might |
413 | have to worry about the lifespan of what it points to. The posix specs | |
414 | don't seem to say anything about this, let's assume here that tm_zone | |
415 | will be a constant and therefore no protection or anything is needed | |
416 | until we copy it in filltime(). */ | |
417 | ||
1c299a6b | 418 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 419 | (SCM time), |
1e6808ea MG |
420 | "Return an object representing the broken down components of\n" |
421 | "@var{time}, an integer like the one returned by\n" | |
422 | "@code{current-time}. The values are calculated for UTC.") | |
1bbd0b84 | 423 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
424 | { |
425 | timet itime; | |
45198ffb | 426 | struct tm bd_buf, *bd_time; |
d6d9e957 | 427 | const char *zname; |
19468eff | 428 | |
e4b265d8 | 429 | itime = SCM_NUM2LONG (1, time); |
45198ffb | 430 | |
73ae3b4c KR |
431 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
432 | Give a sensible default value in case gmtime doesn't set it. */ | |
433 | errno = EINVAL; | |
45198ffb KR |
434 | |
435 | #if HAVE_GMTIME_R | |
436 | bd_time = gmtime_r (&itime, &bd_buf); | |
437 | #else | |
438 | SCM_DEFER_INTS; | |
19468eff | 439 | bd_time = gmtime (&itime); |
45198ffb KR |
440 | if (bd_time != NULL) |
441 | bd_buf = *bd_time; | |
442 | SCM_ALLOW_INTS; | |
443 | #endif | |
19468eff | 444 | if (bd_time == NULL) |
1bbd0b84 | 445 | SCM_SYSERROR; |
45198ffb | 446 | |
d6d9e957 | 447 | #if HAVE_STRUCT_TM_TM_ZONE |
45198ffb | 448 | zname = bd_buf.tm_zone; |
d6d9e957 KR |
449 | #else |
450 | zname = "GMT"; | |
451 | #endif | |
45198ffb | 452 | return filltime (&bd_buf, 0, zname); |
19468eff | 453 | } |
1bbd0b84 | 454 | #undef FUNC_NAME |
19468eff | 455 | |
b9525b92 GH |
456 | /* copy time components from a Scheme object to a struct tm. */ |
457 | static void | |
3eeba8d4 | 458 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 459 | { |
34d19ef6 | 460 | SCM const *velts; |
55a7fc62 GH |
461 | int i; |
462 | ||
0c95b57d | 463 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
9fd38a3d | 464 | && SCM_VECTOR_LENGTH (sbd_time) == 11, |
b9525b92 | 465 | sbd_time, pos, subr); |
55a7fc62 GH |
466 | velts = SCM_VELTS (sbd_time); |
467 | for (i = 0; i < 10; i++) | |
468 | { | |
e11e83f3 | 469 | SCM_ASSERT (scm_is_integer (velts[i]), sbd_time, pos, subr); |
55a7fc62 | 470 | } |
7f9994d9 | 471 | SCM_ASSERT (scm_is_false (velts[10]) || scm_is_string (velts[10]), |
55a7fc62 GH |
472 | sbd_time, pos, subr); |
473 | ||
e11e83f3 MV |
474 | lt->tm_sec = scm_to_int (velts[0]); |
475 | lt->tm_min = scm_to_int (velts[1]); | |
476 | lt->tm_hour = scm_to_int (velts[2]); | |
477 | lt->tm_mday = scm_to_int (velts[3]); | |
478 | lt->tm_mon = scm_to_int (velts[4]); | |
479 | lt->tm_year = scm_to_int (velts[5]); | |
480 | lt->tm_wday = scm_to_int (velts[6]); | |
481 | lt->tm_yday = scm_to_int (velts[7]); | |
482 | lt->tm_isdst = scm_to_int (velts[8]); | |
c7abe4f3 | 483 | #ifdef HAVE_TM_ZONE |
e11e83f3 | 484 | lt->tm_gmtoff = scm_to_int (velts[9]); |
7888309b | 485 | if (scm_is_false (velts[10])) |
55a7fc62 GH |
486 | lt->tm_zone = NULL; |
487 | else | |
cc95e00a | 488 | lt->tm_zone = scm_to_locale_string (velts[10]); |
c7abe4f3 | 489 | #endif |
b9525b92 GH |
490 | } |
491 | ||
1c299a6b | 492 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 493 | (SCM sbd_time, SCM zone), |
a3c8b9fc MD |
494 | "@var{bd-time} is an object representing broken down time and @code{zone}\n" |
495 | "is an optional time zone specifier (otherwise the TZ environment variable\n" | |
496 | "or the system default is used).\n\n" | |
a8eac221 | 497 | "Returns a pair: the car is a corresponding\n" |
a3c8b9fc | 498 | "integer time value like that returned\n" |
a8eac221 | 499 | "by @code{current-time}; the cdr is a broken down time object, similar to\n" |
a3c8b9fc | 500 | "as @var{bd-time} but with normalized values.") |
1bbd0b84 | 501 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
502 | { |
503 | timet itime; | |
504 | struct tm lt, *utc; | |
505 | SCM result; | |
506 | int zoff; | |
507 | char *zname = 0; | |
ef9ff3fd | 508 | char **oldenv; |
b9525b92 GH |
509 | int err; |
510 | ||
cc95e00a MV |
511 | scm_frame_begin (0); |
512 | ||
1bbd0b84 | 513 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
edea856c | 514 | #if HAVE_STRUCT_TM_TM_ZONE |
cc95e00a | 515 | scm_frame_free ((char *)lt.tm_zone); |
edea856c | 516 | #endif |
19468eff GH |
517 | |
518 | SCM_DEFER_INTS; | |
1bbd0b84 | 519 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
520 | #ifdef LOCALTIME_CACHE |
521 | tzset (); | |
522 | #endif | |
19468eff | 523 | itime = mktime (<); |
73ae3b4c KR |
524 | /* POSIX doesn't say mktime sets errno, and on glibc 2.3.2 for instance it |
525 | doesn't. Force a sensible value for our error message. */ | |
526 | err = EINVAL; | |
19468eff | 527 | |
b9525b92 GH |
528 | if (itime != -1) |
529 | { | |
4d3bacdd | 530 | const char *ptr; |
ef9ff3fd | 531 | |
43ff3170 GH |
532 | /* copy zone name before calling gmtime or restoring the zone. */ |
533 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 534 | ptr = lt.tm_zone; |
43ff3170 | 535 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 536 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
537 | #else |
538 | ptr = ""; | |
b9525b92 | 539 | #endif |
4c9419ac | 540 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 541 | strcpy (zname, ptr); |
b9525b92 | 542 | } |
ef9ff3fd GH |
543 | |
544 | /* get timezone offset in seconds west of UTC. */ | |
73ae3b4c KR |
545 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
546 | Give a sensible default value in case gmtime doesn't set it. */ | |
ef9ff3fd GH |
547 | utc = gmtime (&itime); |
548 | if (utc == NULL) | |
549 | err = errno; | |
550 | ||
1bbd0b84 | 551 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
552 | /* delayed until zone has been restored. */ |
553 | errno = err; | |
554 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 555 | SCM_SYSERROR; |
b9525b92 | 556 | |
19468eff GH |
557 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
558 | + utc->tm_sec - lt.tm_sec; | |
559 | if (utc->tm_year < lt.tm_year) | |
560 | zoff -= 24 * 60 * 60; | |
561 | else if (utc->tm_year > lt.tm_year) | |
562 | zoff += 24 * 60 * 60; | |
563 | else if (utc->tm_yday < lt.tm_yday) | |
564 | zoff -= 24 * 60 * 60; | |
565 | else if (utc->tm_yday > lt.tm_yday) | |
566 | zoff += 24 * 60 * 60; | |
567 | ||
b9bd8526 | 568 | result = scm_cons (scm_from_long (itime), |
19468eff GH |
569 | filltime (<, zoff, zname)); |
570 | SCM_ALLOW_INTS; | |
4c9419ac MV |
571 | if (zname) |
572 | free (zname); | |
cc95e00a MV |
573 | |
574 | scm_frame_end (); | |
19468eff | 575 | return result; |
0f2d19dd | 576 | } |
1bbd0b84 | 577 | #undef FUNC_NAME |
0f2d19dd | 578 | |
38c1d3c4 | 579 | #ifdef HAVE_TZSET |
1c299a6b | 580 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 581 | (void), |
a3c8b9fc MD |
582 | "Initialize the timezone from the TZ environment variable\n" |
583 | "or the system default. It's not usually necessary to call this procedure\n" | |
584 | "since it's done automatically by other procedures that depend on the\n" | |
585 | "timezone.") | |
1bbd0b84 | 586 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 587 | { |
19468eff GH |
588 | tzset(); |
589 | return SCM_UNSPECIFIED; | |
0f2d19dd | 590 | } |
1bbd0b84 | 591 | #undef FUNC_NAME |
38c1d3c4 | 592 | #endif /* HAVE_TZSET */ |
0f2d19dd | 593 | |
a1ec6916 | 594 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 595 | (SCM format, SCM stime), |
a3c8b9fc MD |
596 | "Formats a time specification @var{time} using @var{template}. @var{time}\n" |
597 | "is an object with time components in the form returned by @code{localtime}\n" | |
598 | "or @code{gmtime}. @var{template} is a string which can include formatting\n" | |
599 | "specifications introduced by a @code{%} character. The formatting of\n" | |
600 | "month and day names is dependent on the current locale. The value returned\n" | |
601 | "is the formatted string.\n" | |
602 | "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 603 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
604 | { |
605 | struct tm t; | |
606 | ||
607 | char *tbuf; | |
608 | int size = 50; | |
cc95e00a MV |
609 | const char *fmt; |
610 | char *myfmt; | |
b9525b92 | 611 | int len; |
ef9ff3fd | 612 | SCM result; |
b9525b92 | 613 | |
a6d9e5ab | 614 | SCM_VALIDATE_STRING (1, format); |
1bbd0b84 | 615 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 616 | |
cc95e00a MV |
617 | fmt = scm_i_string_chars (format); |
618 | len = scm_i_string_length (format); | |
b9525b92 | 619 | |
a15e6dcc MV |
620 | /* Ugly hack: strftime can return 0 if its buffer is too small, |
621 | but some valid time strings (e.g. "%p") can sometimes produce | |
622 | a zero-byte output string! Workaround is to prepend a junk | |
623 | character to the format string, so that valid returns are always | |
624 | nonzero. */ | |
4c9419ac | 625 | myfmt = scm_malloc (len+2); |
a15e6dcc MV |
626 | *myfmt = 'x'; |
627 | strncpy(myfmt+1, fmt, len); | |
628 | myfmt[len+1] = 0; | |
629 | ||
4c9419ac | 630 | tbuf = scm_malloc (size); |
b8a1b29b GH |
631 | { |
632 | #if !defined (HAVE_TM_ZONE) | |
633 | /* it seems the only way to tell non-GNU versions of strftime what | |
634 | zone to use (for the %Z format) is to set TZ in the | |
635 | environment. interrupts and thread switching must be deferred | |
636 | until TZ is restored. */ | |
637 | char **oldenv = NULL; | |
2e945bcc | 638 | SCM *velts = (SCM *) SCM_VELTS (stime); |
e652b54f | 639 | int have_zone = 0; |
b8a1b29b | 640 | |
7888309b | 641 | if (scm_is_true (velts[10]) && *SCM_STRING_CHARS (velts[10]) != 0) |
b8a1b29b GH |
642 | { |
643 | /* it's not required that the TZ setting be correct, just that | |
e652b54f GH |
644 | it has the right name. so try something like TZ=EST0. |
645 | using only TZ=EST would be simpler but it doesn't work on | |
646 | some OSs, e.g., Solaris. */ | |
647 | SCM zone = | |
648 | scm_string_append (scm_cons (velts[10], | |
edea856c | 649 | scm_cons (scm_from_locale_string ("0"), |
e652b54f | 650 | SCM_EOL))); |
1c299a6b | 651 | |
e652b54f | 652 | have_zone = 1; |
b8a1b29b | 653 | SCM_DEFER_INTS; |
e652b54f | 654 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
b8a1b29b GH |
655 | } |
656 | #endif | |
657 | ||
38c1d3c4 | 658 | #ifdef LOCALTIME_CACHE |
b8a1b29b GH |
659 | tzset (); |
660 | #endif | |
661 | ||
a15e6dcc MV |
662 | /* POSIX says strftime returns 0 on buffer overrun, but old |
663 | systems (i.e. libc 4 on GNU/Linux) might return `size' in that | |
664 | case. */ | |
665 | while ((len = strftime (tbuf, size, myfmt, &t)) == 0 || len == size) | |
b8a1b29b | 666 | { |
4c9419ac | 667 | free (tbuf); |
b8a1b29b | 668 | size *= 2; |
4c9419ac | 669 | tbuf = scm_malloc (size); |
b8a1b29b GH |
670 | } |
671 | ||
672 | #if !defined (HAVE_TM_ZONE) | |
e652b54f | 673 | if (have_zone) |
b8a1b29b GH |
674 | { |
675 | restorezone (velts[10], oldenv, FUNC_NAME); | |
676 | SCM_ALLOW_INTS; | |
677 | } | |
38c1d3c4 | 678 | #endif |
b9525b92 | 679 | } |
b8a1b29b | 680 | |
cc95e00a | 681 | result = scm_from_locale_stringn (tbuf + 1, len - 1); |
4c9419ac MV |
682 | free (tbuf); |
683 | free (myfmt); | |
ef9ff3fd | 684 | return result; |
b9525b92 | 685 | } |
1bbd0b84 | 686 | #undef FUNC_NAME |
b9525b92 | 687 | |
f25f761d | 688 | #ifdef HAVE_STRPTIME |
a1ec6916 | 689 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 690 | (SCM format, SCM string), |
a8eac221 MG |
691 | "Performs the reverse action to @code{strftime}, parsing\n" |
692 | "@var{string} according to the specification supplied in\n" | |
693 | "@var{template}. The interpretation of month and day names is\n" | |
694 | "dependent on the current locale. The value returned is a pair.\n" | |
695 | "The car has an object with time components\n" | |
a3c8b9fc MD |
696 | "in the form returned by @code{localtime} or @code{gmtime},\n" |
697 | "but the time zone components\n" | |
698 | "are not usefully set.\n" | |
a8eac221 MG |
699 | "The cdr reports the number of characters from @var{string}\n" |
700 | "which were used for the conversion.") | |
1bbd0b84 | 701 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 702 | { |
b9525b92 | 703 | struct tm t; |
cc95e00a | 704 | const char *fmt, *str, *rest; |
b9525b92 | 705 | |
a6d9e5ab DH |
706 | SCM_VALIDATE_STRING (1, format); |
707 | SCM_VALIDATE_STRING (2, string); | |
b9525b92 | 708 | |
cc95e00a MV |
709 | fmt = scm_i_string_chars (format); |
710 | str = scm_i_string_chars (string); | |
b9525b92 GH |
711 | |
712 | /* initialize the struct tm */ | |
713 | #define tm_init(field) t.field = 0 | |
714 | tm_init (tm_sec); | |
715 | tm_init (tm_min); | |
716 | tm_init (tm_hour); | |
717 | tm_init (tm_mday); | |
718 | tm_init (tm_mon); | |
719 | tm_init (tm_year); | |
720 | tm_init (tm_wday); | |
721 | tm_init (tm_yday); | |
722 | #undef tm_init | |
723 | ||
03b79aa3 KR |
724 | /* GNU glibc strptime() "%s" is affected by the current timezone, since it |
725 | reads a UTC time_t value and converts with localtime_r() to set the tm | |
726 | fields, hence the use of SCM_DEFER_INTS. */ | |
b9525b92 GH |
727 | t.tm_isdst = -1; |
728 | SCM_DEFER_INTS; | |
729 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
73ae3b4c KR |
730 | { |
731 | /* POSIX doesn't say strptime sets errno, and on glibc 2.3.2 for | |
732 | instance it doesn't. Force a sensible value for our error | |
733 | message. */ | |
734 | errno = EINVAL; | |
735 | SCM_SYSERROR; | |
736 | } | |
b9525b92 GH |
737 | |
738 | SCM_ALLOW_INTS; | |
e11e83f3 MV |
739 | return scm_cons (filltime (&t, 0, NULL), |
740 | scm_from_signed_integer (rest - str)); | |
b9525b92 | 741 | } |
1bbd0b84 | 742 | #undef FUNC_NAME |
f25f761d | 743 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 744 | |
0f2d19dd JB |
745 | void |
746 | scm_init_stime() | |
0f2d19dd | 747 | { |
86d31dfe | 748 | scm_c_define ("internal-time-units-per-second", |
b9bd8526 | 749 | scm_from_long (SCM_TIME_UNITS_PER_SECOND)); |
0f2d19dd JB |
750 | |
751 | #ifdef HAVE_FTIME | |
752 | if (!scm_your_base.time) ftime(&scm_your_base); | |
753 | #else | |
754 | if (!scm_your_base) time(&scm_your_base); | |
755 | #endif | |
756 | ||
757 | if (!scm_my_base) scm_my_base = mytime(); | |
758 | ||
876c87ce | 759 | scm_add_feature ("current-time"); |
a0599745 | 760 | #include "libguile/stime.x" |
0f2d19dd JB |
761 | } |
762 | ||
89e00824 ML |
763 | |
764 | /* | |
765 | Local Variables: | |
766 | c-file-style: "gnu" | |
767 | End: | |
768 | */ |