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 | ||
3cf2f52d RB |
21 | #if HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
24 | ||
0f2d19dd | 25 | #include <stdio.h> |
e6e2e95a MD |
26 | #include <errno.h> |
27 | ||
a0599745 MD |
28 | #include "libguile/_scm.h" |
29 | #include "libguile/feature.h" | |
30 | #include "libguile/strings.h" | |
31 | #include "libguile/vectors.h" | |
20e6290e | 32 | |
a0599745 MD |
33 | #include "libguile/validate.h" |
34 | #include "libguile/stime.h" | |
20e6290e | 35 | |
0f2d19dd JB |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #endif | |
39 | ||
40 | \f | |
41 | # ifdef HAVE_SYS_TYPES_H | |
42 | # include <sys/types.h> | |
43 | # endif | |
44 | ||
a15e6dcc MV |
45 | #ifdef HAVE_STRING_H |
46 | #include <string.h> | |
47 | #endif | |
48 | ||
b1978258 GH |
49 | #ifdef HAVE_SYS_TIMES_H |
50 | # include <sys/times.h> | |
51 | #endif | |
52 | ||
53 | #ifdef HAVE_SYS_TIMEB_H | |
54 | # include <sys/timeb.h> | |
55 | #endif | |
0f2d19dd | 56 | |
eb7e1603 KR |
57 | #if HAVE_CRT_EXTERNS_H |
58 | #include <crt_externs.h> /* for Darwin _NSGetEnviron */ | |
59 | #endif | |
60 | ||
b9525b92 GH |
61 | #ifndef tzname /* For SGI. */ |
62 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
63 | #endif | |
79dcdf51 MV |
64 | #if defined (__MINGW32__) |
65 | # define tzname _tzname | |
66 | #endif | |
b9525b92 | 67 | |
4d3bacdd JB |
68 | #ifdef MISSING_STRPTIME_DECL |
69 | extern char *strptime (); | |
70 | #endif | |
71 | ||
0f2d19dd JB |
72 | #ifdef __STDC__ |
73 | # define timet time_t | |
74 | #else | |
75 | # define timet long | |
76 | #endif | |
77 | ||
eb7e1603 KR |
78 | extern char ** environ; |
79 | ||
80 | /* On Apple Darwin in a shared library there's no "environ" to access | |
81 | directly, instead the address of that variable must be obtained with | |
82 | _NSGetEnviron(). */ | |
83 | #if HAVE__NSGETENVIRON && defined (PIC) | |
84 | #define environ (*_NSGetEnviron()) | |
85 | #endif | |
86 | ||
87 | ||
0f2d19dd | 88 | #ifdef HAVE_TIMES |
0f2d19dd | 89 | static |
1c299a6b | 90 | timet mytime() |
0f2d19dd JB |
91 | { |
92 | struct tms time_buffer; | |
93 | times(&time_buffer); | |
94 | return time_buffer.tms_utime + time_buffer.tms_stime; | |
95 | } | |
96 | #else | |
97 | # ifdef LACK_CLOCK | |
756414cf | 98 | # define mytime() ((time((timet*)0) - scm_your_base) * SCM_TIME_UNITS_PER_SECOND) |
0f2d19dd JB |
99 | # else |
100 | # define mytime clock | |
101 | # endif | |
102 | #endif | |
103 | ||
0f2d19dd | 104 | #ifdef HAVE_FTIME |
0f2d19dd | 105 | struct timeb scm_your_base = {0}; |
b450f070 GB |
106 | #else |
107 | timet scm_your_base = 0; | |
108 | #endif | |
1bbd0b84 | 109 | |
1c299a6b | 110 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 111 | (), |
1e6808ea MG |
112 | "Return the number of time units since the interpreter was\n" |
113 | "started.") | |
1bbd0b84 | 114 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd | 115 | { |
b450f070 | 116 | #ifdef HAVE_FTIME |
0f2d19dd | 117 | struct timeb time_buffer; |
55c4d089 JB |
118 | |
119 | SCM tmp; | |
120 | ftime (&time_buffer); | |
0f2d19dd | 121 | time_buffer.time -= scm_your_base.time; |
55c4d089 JB |
122 | tmp = scm_long2num (time_buffer.millitm - scm_your_base.millitm); |
123 | tmp = scm_sum (tmp, | |
124 | scm_product (SCM_MAKINUM (1000), | |
125 | SCM_MAKINUM (time_buffer.time))); | |
756414cf | 126 | return scm_quotient (scm_product (tmp, SCM_MAKINUM (SCM_TIME_UNITS_PER_SECOND)), |
55c4d089 | 127 | SCM_MAKINUM (1000)); |
0f2d19dd | 128 | #else |
756414cf | 129 | return scm_long2num((time((timet*)0) - scm_your_base) * (int)SCM_TIME_UNITS_PER_SECOND); |
b450f070 | 130 | #endif /* HAVE_FTIME */ |
0f2d19dd | 131 | } |
1bbd0b84 GB |
132 | #undef FUNC_NAME |
133 | ||
0f2d19dd | 134 | |
f25f761d | 135 | #ifdef HAVE_TIMES |
1c299a6b | 136 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 137 | (void), |
1e6808ea MG |
138 | "Return an object with information about real and processor\n" |
139 | "time. The following procedures accept such an object as an\n" | |
140 | "argument and return a selected component:\n" | |
141 | "\n" | |
b380b885 MD |
142 | "@table @code\n" |
143 | "@item tms:clock\n" | |
144 | "The current real time, expressed as time units relative to an\n" | |
145 | "arbitrary base.\n" | |
146 | "@item tms:utime\n" | |
147 | "The CPU time units used by the calling process.\n" | |
148 | "@item tms:stime\n" | |
1e6808ea MG |
149 | "The CPU time units used by the system on behalf of the calling\n" |
150 | "process.\n" | |
b380b885 | 151 | "@item tms:cutime\n" |
1e6808ea MG |
152 | "The CPU time units used by terminated child processes of the\n" |
153 | "calling process, whose status has been collected (e.g., using\n" | |
154 | "@code{waitpid}).\n" | |
b380b885 | 155 | "@item tms:cstime\n" |
1e6808ea | 156 | "Similarly, the CPU times units used by the system on behalf of\n" |
b380b885 MD |
157 | "terminated child processes.\n" |
158 | "@end table") | |
1bbd0b84 | 159 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 160 | { |
6afcd3b2 GH |
161 | struct tms t; |
162 | clock_t rv; | |
163 | ||
00ffa0e7 | 164 | SCM result = scm_c_make_vector (5, SCM_UNDEFINED); |
6afcd3b2 GH |
165 | rv = times (&t); |
166 | if (rv == -1) | |
1bbd0b84 | 167 | SCM_SYSERROR; |
34d19ef6 HWN |
168 | SCM_VECTOR_SET (result, 0, scm_long2num (rv)); |
169 | SCM_VECTOR_SET (result, 1, scm_long2num (t.tms_utime)); | |
170 | SCM_VECTOR_SET (result, 2, scm_long2num (t.tms_stime)); | |
171 | SCM_VECTOR_SET (result ,3, scm_long2num (t.tms_cutime)); | |
172 | SCM_VECTOR_SET (result, 4, scm_long2num (t.tms_cstime)); | |
6afcd3b2 | 173 | return result; |
6afcd3b2 | 174 | } |
1bbd0b84 | 175 | #undef FUNC_NAME |
f25f761d | 176 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 177 | |
0f2d19dd JB |
178 | static long scm_my_base = 0; |
179 | ||
1c299a6b ML |
180 | long |
181 | scm_c_get_internal_run_time () | |
182 | { | |
183 | return mytime () - scm_my_base; | |
184 | } | |
185 | ||
186 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, | |
1bbd0b84 | 187 | (void), |
1e6808ea MG |
188 | "Return the number of time units of processor time used by the\n" |
189 | "interpreter. Both @emph{system} and @emph{user} time are\n" | |
190 | "included but subprocesses are not.") | |
1bbd0b84 | 191 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 192 | { |
1c299a6b | 193 | return scm_long2num (scm_c_get_internal_run_time ()); |
0f2d19dd | 194 | } |
1bbd0b84 | 195 | #undef FUNC_NAME |
0f2d19dd | 196 | |
f40771d8 KR |
197 | /* For reference, note that current-time and gettimeofday both should be |
198 | protected against setzone/restorezone changes in another thread, since on | |
199 | DOS the system time is normally kept as local time, which means TZ | |
200 | affects the return from current-time and gettimeofday. Not sure if DJGPP | |
201 | etc actually has concurrent multi-threading, but it seems prudent not to | |
202 | make assumptions about this. */ | |
203 | ||
1c299a6b | 204 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 205 | (void), |
1e6808ea MG |
206 | "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n" |
207 | "excluding leap seconds.") | |
1bbd0b84 | 208 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 209 | { |
19468eff GH |
210 | timet timv; |
211 | ||
212 | SCM_DEFER_INTS; | |
213 | if ((timv = time (0)) == -1) | |
2d99b584 | 214 | SCM_MISC_ERROR ("current time not available", SCM_EOL); |
19468eff GH |
215 | SCM_ALLOW_INTS; |
216 | return scm_long2num((long) timv); | |
217 | } | |
1bbd0b84 | 218 | #undef FUNC_NAME |
19468eff | 219 | |
1c299a6b | 220 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 221 | (void), |
1e6808ea MG |
222 | "Return a pair containing the number of seconds and microseconds\n" |
223 | "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n" | |
224 | "whether true microsecond resolution is available depends on the\n" | |
225 | "operating system.") | |
1bbd0b84 | 226 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
227 | { |
228 | #ifdef HAVE_GETTIMEOFDAY | |
229 | struct timeval time; | |
230 | ||
231 | SCM_DEFER_INTS; | |
232 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 233 | SCM_SYSERROR; |
19468eff GH |
234 | SCM_ALLOW_INTS; |
235 | return scm_cons (scm_long2num ((long) time.tv_sec), | |
236 | scm_long2num ((long) time.tv_usec)); | |
237 | #else | |
238 | # ifdef HAVE_FTIME | |
239 | struct timeb time; | |
240 | ||
241 | ftime(&time); | |
1c299a6b | 242 | return scm_cons (scm_long2num ((long) time.time), |
9a81afca | 243 | SCM_MAKINUM (time.millitm * 1000)); |
19468eff GH |
244 | # else |
245 | timet timv; | |
1c299a6b | 246 | |
19468eff GH |
247 | SCM_DEFER_INTS; |
248 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 249 | SCM_SYSERROR; |
19468eff GH |
250 | SCM_ALLOW_INTS; |
251 | return scm_cons (scm_long2num (timv), SCM_MAKINUM (0)); | |
252 | # endif | |
253 | #endif | |
254 | } | |
1bbd0b84 | 255 | #undef FUNC_NAME |
19468eff GH |
256 | |
257 | static SCM | |
d6d9e957 | 258 | filltime (struct tm *bd_time, int zoff, const char *zname) |
19468eff | 259 | { |
00ffa0e7 | 260 | SCM result = scm_c_make_vector (11, SCM_UNDEFINED); |
19468eff | 261 | |
34d19ef6 HWN |
262 | SCM_VECTOR_SET (result,0, SCM_MAKINUM (bd_time->tm_sec)); |
263 | SCM_VECTOR_SET (result,1, SCM_MAKINUM (bd_time->tm_min)); | |
264 | SCM_VECTOR_SET (result,2, SCM_MAKINUM (bd_time->tm_hour)); | |
265 | SCM_VECTOR_SET (result,3, SCM_MAKINUM (bd_time->tm_mday)); | |
266 | SCM_VECTOR_SET (result,4, SCM_MAKINUM (bd_time->tm_mon)); | |
267 | SCM_VECTOR_SET (result,5, SCM_MAKINUM (bd_time->tm_year)); | |
268 | SCM_VECTOR_SET (result,6, SCM_MAKINUM (bd_time->tm_wday)); | |
269 | SCM_VECTOR_SET (result,7, SCM_MAKINUM (bd_time->tm_yday)); | |
270 | SCM_VECTOR_SET (result,8, SCM_MAKINUM (bd_time->tm_isdst)); | |
271 | SCM_VECTOR_SET (result,9, SCM_MAKINUM (zoff)); | |
272 | SCM_VECTOR_SET (result,10, zname ? scm_makfrom0str (zname) : SCM_BOOL_F); | |
19468eff GH |
273 | return result; |
274 | } | |
275 | ||
ef9ff3fd | 276 | static char tzvar[3] = "TZ"; |
ef9ff3fd | 277 | |
38c1d3c4 GH |
278 | /* if zone is set, create a temporary environment with only a TZ |
279 | string. other threads or interrupt handlers shouldn't be allowed | |
280 | to run until the corresponding restorezone is called. hence the use | |
281 | of a static variable for tmpenv is no big deal. */ | |
ef9ff3fd | 282 | static char ** |
3eeba8d4 | 283 | setzone (SCM zone, int pos, const char *subr) |
b9525b92 | 284 | { |
ef9ff3fd | 285 | char **oldenv = 0; |
b9525b92 GH |
286 | |
287 | if (!SCM_UNBNDP (zone)) | |
288 | { | |
ef9ff3fd | 289 | static char *tmpenv[2]; |
b9525b92 GH |
290 | char *buf; |
291 | ||
9fd38a3d | 292 | SCM_ASSERT (SCM_STRINGP (zone), zone, pos, subr); |
4c9419ac | 293 | buf = scm_malloc (SCM_STRING_LENGTH (zone) + sizeof (tzvar) + 1); |
a6d9e5ab | 294 | sprintf (buf, "%s=%s", tzvar, SCM_STRING_CHARS (zone)); |
ef9ff3fd GH |
295 | oldenv = environ; |
296 | tmpenv[0] = buf; | |
297 | tmpenv[1] = 0; | |
298 | environ = tmpenv; | |
b9525b92 | 299 | } |
ef9ff3fd | 300 | return oldenv; |
b9525b92 GH |
301 | } |
302 | ||
303 | static void | |
e81d98ec | 304 | restorezone (SCM zone, char **oldenv, const char *subr SCM_UNUSED) |
b9525b92 GH |
305 | { |
306 | if (!SCM_UNBNDP (zone)) | |
307 | { | |
4c9419ac | 308 | free (environ[0]); |
ef9ff3fd | 309 | environ = oldenv; |
38c1d3c4 GH |
310 | #ifdef HAVE_TZSET |
311 | /* for the possible benefit of user code linked with libguile. */ | |
b9525b92 | 312 | tzset(); |
38c1d3c4 | 313 | #endif |
b9525b92 GH |
314 | } |
315 | } | |
316 | ||
1c299a6b | 317 | SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0, |
1bbd0b84 | 318 | (SCM time, SCM zone), |
1e6808ea MG |
319 | "Return an object representing the broken down components of\n" |
320 | "@var{time}, an integer like the one returned by\n" | |
321 | "@code{current-time}. The time zone for the calculation is\n" | |
322 | "optionally specified by @var{zone} (a string), otherwise the\n" | |
323 | "@code{TZ} environment variable or the system default is used.") | |
1bbd0b84 | 324 | #define FUNC_NAME s_scm_localtime |
19468eff GH |
325 | { |
326 | timet itime; | |
4edc089c | 327 | struct tm *ltptr, lt, *utc; |
19468eff GH |
328 | SCM result; |
329 | int zoff; | |
330 | char *zname = 0; | |
ef9ff3fd | 331 | char **oldenv; |
19468eff GH |
332 | int err; |
333 | ||
e4b265d8 | 334 | itime = SCM_NUM2LONG (1, time); |
38c1d3c4 GH |
335 | |
336 | /* deferring interupts is essential since a) setzone may install a temporary | |
337 | environment b) localtime uses a static buffer. */ | |
19468eff | 338 | SCM_DEFER_INTS; |
1bbd0b84 | 339 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
340 | #ifdef LOCALTIME_CACHE |
341 | tzset (); | |
342 | #endif | |
73ae3b4c KR |
343 | /* POSIX says localtime sets errno, but C99 doesn't say that. |
344 | Give a sensible default value in case localtime doesn't set it. */ | |
345 | errno = EINVAL; | |
4edc089c | 346 | ltptr = localtime (&itime); |
19468eff | 347 | err = errno; |
4edc089c | 348 | if (ltptr) |
19468eff | 349 | { |
4d3bacdd | 350 | const char *ptr; |
ef9ff3fd | 351 | |
43ff3170 GH |
352 | /* copy zone name before calling gmtime or restoring zone. */ |
353 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 354 | ptr = ltptr->tm_zone; |
43ff3170 | 355 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 356 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
357 | #else |
358 | ptr = ""; | |
b9525b92 | 359 | #endif |
4c9419ac | 360 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 361 | strcpy (zname, ptr); |
19468eff | 362 | } |
ef9ff3fd GH |
363 | /* the struct is copied in case localtime and gmtime share a buffer. */ |
364 | if (ltptr) | |
365 | lt = *ltptr; | |
73ae3b4c KR |
366 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
367 | Give a sensible default value in case gmtime doesn't set it. */ | |
368 | errno = EINVAL; | |
ef9ff3fd GH |
369 | utc = gmtime (&itime); |
370 | if (utc == NULL) | |
371 | err = errno; | |
1bbd0b84 | 372 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 373 | /* delayed until zone has been restored. */ |
19468eff | 374 | errno = err; |
4edc089c | 375 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 376 | SCM_SYSERROR; |
19468eff GH |
377 | |
378 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
379 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
380 | + utc->tm_sec - lt.tm_sec; | |
381 | if (utc->tm_year < lt.tm_year) | |
19468eff | 382 | zoff -= 24 * 60 * 60; |
4edc089c | 383 | else if (utc->tm_year > lt.tm_year) |
19468eff | 384 | zoff += 24 * 60 * 60; |
4edc089c | 385 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 386 | zoff -= 24 * 60 * 60; |
4edc089c | 387 | else if (utc->tm_yday > lt.tm_yday) |
19468eff | 388 | zoff += 24 * 60 * 60; |
1c299a6b | 389 | |
4edc089c | 390 | result = filltime (<, zoff, zname); |
19468eff | 391 | SCM_ALLOW_INTS; |
4c9419ac MV |
392 | if (zname) |
393 | free (zname); | |
19468eff GH |
394 | return result; |
395 | } | |
1bbd0b84 | 396 | #undef FUNC_NAME |
19468eff | 397 | |
1c299a6b | 398 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 399 | (SCM time), |
1e6808ea MG |
400 | "Return an object representing the broken down components of\n" |
401 | "@var{time}, an integer like the one returned by\n" | |
402 | "@code{current-time}. The values are calculated for UTC.") | |
1bbd0b84 | 403 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
404 | { |
405 | timet itime; | |
406 | struct tm *bd_time; | |
407 | SCM result; | |
d6d9e957 | 408 | const char *zname; |
19468eff | 409 | |
e4b265d8 | 410 | itime = SCM_NUM2LONG (1, time); |
19468eff | 411 | SCM_DEFER_INTS; |
73ae3b4c KR |
412 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
413 | Give a sensible default value in case gmtime doesn't set it. */ | |
414 | errno = EINVAL; | |
19468eff GH |
415 | bd_time = gmtime (&itime); |
416 | if (bd_time == NULL) | |
1bbd0b84 | 417 | SCM_SYSERROR; |
d6d9e957 KR |
418 | #if HAVE_STRUCT_TM_TM_ZONE |
419 | zname = bd_time->tm_zone; | |
420 | #else | |
421 | zname = "GMT"; | |
422 | #endif | |
423 | result = filltime (bd_time, 0, zname); | |
19468eff GH |
424 | SCM_ALLOW_INTS; |
425 | return result; | |
426 | } | |
1bbd0b84 | 427 | #undef FUNC_NAME |
19468eff | 428 | |
b9525b92 GH |
429 | /* copy time components from a Scheme object to a struct tm. */ |
430 | static void | |
3eeba8d4 | 431 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 432 | { |
34d19ef6 | 433 | SCM const *velts; |
55a7fc62 GH |
434 | int i; |
435 | ||
0c95b57d | 436 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
9fd38a3d | 437 | && SCM_VECTOR_LENGTH (sbd_time) == 11, |
b9525b92 | 438 | sbd_time, pos, subr); |
55a7fc62 GH |
439 | velts = SCM_VELTS (sbd_time); |
440 | for (i = 0; i < 10; i++) | |
441 | { | |
442 | SCM_ASSERT (SCM_INUMP (velts[i]), sbd_time, pos, subr); | |
443 | } | |
0c95b57d | 444 | SCM_ASSERT (SCM_FALSEP (velts[10]) || SCM_STRINGP (velts[10]), |
55a7fc62 GH |
445 | sbd_time, pos, subr); |
446 | ||
447 | lt->tm_sec = SCM_INUM (velts[0]); | |
448 | lt->tm_min = SCM_INUM (velts[1]); | |
449 | lt->tm_hour = SCM_INUM (velts[2]); | |
450 | lt->tm_mday = SCM_INUM (velts[3]); | |
451 | lt->tm_mon = SCM_INUM (velts[4]); | |
452 | lt->tm_year = SCM_INUM (velts[5]); | |
453 | lt->tm_wday = SCM_INUM (velts[6]); | |
454 | lt->tm_yday = SCM_INUM (velts[7]); | |
455 | lt->tm_isdst = SCM_INUM (velts[8]); | |
c7abe4f3 | 456 | #ifdef HAVE_TM_ZONE |
55a7fc62 GH |
457 | lt->tm_gmtoff = SCM_INUM (velts[9]); |
458 | if (SCM_FALSEP (velts[10])) | |
459 | lt->tm_zone = NULL; | |
460 | else | |
a002f1a2 | 461 | lt->tm_zone = SCM_STRING_CHARS (velts[10]); |
c7abe4f3 | 462 | #endif |
b9525b92 GH |
463 | } |
464 | ||
1c299a6b | 465 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 466 | (SCM sbd_time, SCM zone), |
a3c8b9fc MD |
467 | "@var{bd-time} is an object representing broken down time and @code{zone}\n" |
468 | "is an optional time zone specifier (otherwise the TZ environment variable\n" | |
469 | "or the system default is used).\n\n" | |
a8eac221 | 470 | "Returns a pair: the car is a corresponding\n" |
a3c8b9fc | 471 | "integer time value like that returned\n" |
a8eac221 | 472 | "by @code{current-time}; the cdr is a broken down time object, similar to\n" |
a3c8b9fc | 473 | "as @var{bd-time} but with normalized values.") |
1bbd0b84 | 474 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
475 | { |
476 | timet itime; | |
477 | struct tm lt, *utc; | |
478 | SCM result; | |
479 | int zoff; | |
480 | char *zname = 0; | |
ef9ff3fd | 481 | char **oldenv; |
b9525b92 GH |
482 | int err; |
483 | ||
1bbd0b84 | 484 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
19468eff GH |
485 | |
486 | SCM_DEFER_INTS; | |
1bbd0b84 | 487 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
488 | #ifdef LOCALTIME_CACHE |
489 | tzset (); | |
490 | #endif | |
19468eff | 491 | itime = mktime (<); |
73ae3b4c KR |
492 | /* POSIX doesn't say mktime sets errno, and on glibc 2.3.2 for instance it |
493 | doesn't. Force a sensible value for our error message. */ | |
494 | err = EINVAL; | |
19468eff | 495 | |
b9525b92 GH |
496 | if (itime != -1) |
497 | { | |
4d3bacdd | 498 | const char *ptr; |
ef9ff3fd | 499 | |
43ff3170 GH |
500 | /* copy zone name before calling gmtime or restoring the zone. */ |
501 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 502 | ptr = lt.tm_zone; |
43ff3170 | 503 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 504 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
505 | #else |
506 | ptr = ""; | |
b9525b92 | 507 | #endif |
4c9419ac | 508 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 509 | strcpy (zname, ptr); |
b9525b92 | 510 | } |
ef9ff3fd GH |
511 | |
512 | /* get timezone offset in seconds west of UTC. */ | |
73ae3b4c KR |
513 | /* POSIX says gmtime sets errno, but C99 doesn't say that. |
514 | Give a sensible default value in case gmtime doesn't set it. */ | |
ef9ff3fd GH |
515 | utc = gmtime (&itime); |
516 | if (utc == NULL) | |
517 | err = errno; | |
518 | ||
1bbd0b84 | 519 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
520 | /* delayed until zone has been restored. */ |
521 | errno = err; | |
522 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 523 | SCM_SYSERROR; |
b9525b92 | 524 | |
19468eff GH |
525 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
526 | + utc->tm_sec - lt.tm_sec; | |
527 | if (utc->tm_year < lt.tm_year) | |
528 | zoff -= 24 * 60 * 60; | |
529 | else if (utc->tm_year > lt.tm_year) | |
530 | zoff += 24 * 60 * 60; | |
531 | else if (utc->tm_yday < lt.tm_yday) | |
532 | zoff -= 24 * 60 * 60; | |
533 | else if (utc->tm_yday > lt.tm_yday) | |
534 | zoff += 24 * 60 * 60; | |
535 | ||
19468eff GH |
536 | result = scm_cons (scm_long2num ((long) itime), |
537 | filltime (<, zoff, zname)); | |
538 | SCM_ALLOW_INTS; | |
4c9419ac MV |
539 | if (zname) |
540 | free (zname); | |
19468eff | 541 | return result; |
0f2d19dd | 542 | } |
1bbd0b84 | 543 | #undef FUNC_NAME |
0f2d19dd | 544 | |
38c1d3c4 | 545 | #ifdef HAVE_TZSET |
1c299a6b | 546 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 547 | (void), |
a3c8b9fc MD |
548 | "Initialize the timezone from the TZ environment variable\n" |
549 | "or the system default. It's not usually necessary to call this procedure\n" | |
550 | "since it's done automatically by other procedures that depend on the\n" | |
551 | "timezone.") | |
1bbd0b84 | 552 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 553 | { |
19468eff GH |
554 | tzset(); |
555 | return SCM_UNSPECIFIED; | |
0f2d19dd | 556 | } |
1bbd0b84 | 557 | #undef FUNC_NAME |
38c1d3c4 | 558 | #endif /* HAVE_TZSET */ |
0f2d19dd | 559 | |
a1ec6916 | 560 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 561 | (SCM format, SCM stime), |
a3c8b9fc MD |
562 | "Formats a time specification @var{time} using @var{template}. @var{time}\n" |
563 | "is an object with time components in the form returned by @code{localtime}\n" | |
564 | "or @code{gmtime}. @var{template} is a string which can include formatting\n" | |
565 | "specifications introduced by a @code{%} character. The formatting of\n" | |
566 | "month and day names is dependent on the current locale. The value returned\n" | |
567 | "is the formatted string.\n" | |
568 | "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 569 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
570 | { |
571 | struct tm t; | |
572 | ||
573 | char *tbuf; | |
574 | int size = 50; | |
a15e6dcc | 575 | char *fmt, *myfmt; |
b9525b92 | 576 | int len; |
ef9ff3fd | 577 | SCM result; |
b9525b92 | 578 | |
a6d9e5ab | 579 | SCM_VALIDATE_STRING (1, format); |
1bbd0b84 | 580 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 581 | |
a6d9e5ab DH |
582 | fmt = SCM_STRING_CHARS (format); |
583 | len = SCM_STRING_LENGTH (format); | |
b9525b92 | 584 | |
a15e6dcc MV |
585 | /* Ugly hack: strftime can return 0 if its buffer is too small, |
586 | but some valid time strings (e.g. "%p") can sometimes produce | |
587 | a zero-byte output string! Workaround is to prepend a junk | |
588 | character to the format string, so that valid returns are always | |
589 | nonzero. */ | |
4c9419ac | 590 | myfmt = scm_malloc (len+2); |
a15e6dcc MV |
591 | *myfmt = 'x'; |
592 | strncpy(myfmt+1, fmt, len); | |
593 | myfmt[len+1] = 0; | |
594 | ||
4c9419ac | 595 | tbuf = scm_malloc (size); |
b8a1b29b GH |
596 | { |
597 | #if !defined (HAVE_TM_ZONE) | |
598 | /* it seems the only way to tell non-GNU versions of strftime what | |
599 | zone to use (for the %Z format) is to set TZ in the | |
600 | environment. interrupts and thread switching must be deferred | |
601 | until TZ is restored. */ | |
602 | char **oldenv = NULL; | |
2e945bcc | 603 | SCM *velts = (SCM *) SCM_VELTS (stime); |
e652b54f | 604 | int have_zone = 0; |
b8a1b29b | 605 | |
36284627 | 606 | if (!SCM_FALSEP (velts[10]) && *SCM_STRING_CHARS (velts[10]) != 0) |
b8a1b29b GH |
607 | { |
608 | /* it's not required that the TZ setting be correct, just that | |
e652b54f GH |
609 | it has the right name. so try something like TZ=EST0. |
610 | using only TZ=EST would be simpler but it doesn't work on | |
611 | some OSs, e.g., Solaris. */ | |
612 | SCM zone = | |
613 | scm_string_append (scm_cons (velts[10], | |
614 | scm_cons (scm_makfrom0str ("0"), | |
615 | SCM_EOL))); | |
1c299a6b | 616 | |
e652b54f | 617 | have_zone = 1; |
b8a1b29b | 618 | SCM_DEFER_INTS; |
e652b54f | 619 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
b8a1b29b GH |
620 | } |
621 | #endif | |
622 | ||
38c1d3c4 | 623 | #ifdef LOCALTIME_CACHE |
b8a1b29b GH |
624 | tzset (); |
625 | #endif | |
626 | ||
a15e6dcc MV |
627 | /* POSIX says strftime returns 0 on buffer overrun, but old |
628 | systems (i.e. libc 4 on GNU/Linux) might return `size' in that | |
629 | case. */ | |
630 | while ((len = strftime (tbuf, size, myfmt, &t)) == 0 || len == size) | |
b8a1b29b | 631 | { |
4c9419ac | 632 | free (tbuf); |
b8a1b29b | 633 | size *= 2; |
4c9419ac | 634 | tbuf = scm_malloc (size); |
b8a1b29b GH |
635 | } |
636 | ||
637 | #if !defined (HAVE_TM_ZONE) | |
e652b54f | 638 | if (have_zone) |
b8a1b29b GH |
639 | { |
640 | restorezone (velts[10], oldenv, FUNC_NAME); | |
641 | SCM_ALLOW_INTS; | |
642 | } | |
38c1d3c4 | 643 | #endif |
b9525b92 | 644 | } |
b8a1b29b | 645 | |
36284627 | 646 | result = scm_mem2string (tbuf + 1, len - 1); |
4c9419ac MV |
647 | free (tbuf); |
648 | free (myfmt); | |
ef9ff3fd | 649 | return result; |
b9525b92 | 650 | } |
1bbd0b84 | 651 | #undef FUNC_NAME |
b9525b92 | 652 | |
f25f761d | 653 | #ifdef HAVE_STRPTIME |
a1ec6916 | 654 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 655 | (SCM format, SCM string), |
a8eac221 MG |
656 | "Performs the reverse action to @code{strftime}, parsing\n" |
657 | "@var{string} according to the specification supplied in\n" | |
658 | "@var{template}. The interpretation of month and day names is\n" | |
659 | "dependent on the current locale. The value returned is a pair.\n" | |
660 | "The car has an object with time components\n" | |
a3c8b9fc MD |
661 | "in the form returned by @code{localtime} or @code{gmtime},\n" |
662 | "but the time zone components\n" | |
663 | "are not usefully set.\n" | |
a8eac221 MG |
664 | "The cdr reports the number of characters from @var{string}\n" |
665 | "which were used for the conversion.") | |
1bbd0b84 | 666 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 667 | { |
b9525b92 GH |
668 | struct tm t; |
669 | char *fmt, *str, *rest; | |
670 | ||
a6d9e5ab DH |
671 | SCM_VALIDATE_STRING (1, format); |
672 | SCM_VALIDATE_STRING (2, string); | |
b9525b92 | 673 | |
a6d9e5ab DH |
674 | fmt = SCM_STRING_CHARS (format); |
675 | str = SCM_STRING_CHARS (string); | |
b9525b92 GH |
676 | |
677 | /* initialize the struct tm */ | |
678 | #define tm_init(field) t.field = 0 | |
679 | tm_init (tm_sec); | |
680 | tm_init (tm_min); | |
681 | tm_init (tm_hour); | |
682 | tm_init (tm_mday); | |
683 | tm_init (tm_mon); | |
684 | tm_init (tm_year); | |
685 | tm_init (tm_wday); | |
686 | tm_init (tm_yday); | |
687 | #undef tm_init | |
688 | ||
03b79aa3 KR |
689 | /* GNU glibc strptime() "%s" is affected by the current timezone, since it |
690 | reads a UTC time_t value and converts with localtime_r() to set the tm | |
691 | fields, hence the use of SCM_DEFER_INTS. */ | |
b9525b92 GH |
692 | t.tm_isdst = -1; |
693 | SCM_DEFER_INTS; | |
694 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
73ae3b4c KR |
695 | { |
696 | /* POSIX doesn't say strptime sets errno, and on glibc 2.3.2 for | |
697 | instance it doesn't. Force a sensible value for our error | |
698 | message. */ | |
699 | errno = EINVAL; | |
700 | SCM_SYSERROR; | |
701 | } | |
b9525b92 GH |
702 | |
703 | SCM_ALLOW_INTS; | |
704 | return scm_cons (filltime (&t, 0, NULL), SCM_MAKINUM (rest - str)); | |
b9525b92 | 705 | } |
1bbd0b84 | 706 | #undef FUNC_NAME |
f25f761d | 707 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 708 | |
0f2d19dd JB |
709 | void |
710 | scm_init_stime() | |
0f2d19dd | 711 | { |
86d31dfe | 712 | scm_c_define ("internal-time-units-per-second", |
756414cf | 713 | scm_long2num((long) SCM_TIME_UNITS_PER_SECOND)); |
0f2d19dd JB |
714 | |
715 | #ifdef HAVE_FTIME | |
716 | if (!scm_your_base.time) ftime(&scm_your_base); | |
717 | #else | |
718 | if (!scm_your_base) time(&scm_your_base); | |
719 | #endif | |
720 | ||
721 | if (!scm_my_base) scm_my_base = mytime(); | |
722 | ||
876c87ce | 723 | scm_add_feature ("current-time"); |
a0599745 | 724 | #include "libguile/stime.x" |
0f2d19dd JB |
725 | } |
726 | ||
89e00824 ML |
727 | |
728 | /* | |
729 | Local Variables: | |
730 | c-file-style: "gnu" | |
731 | End: | |
732 | */ |