Commit | Line | Data |
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756414cf | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003 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 | |
b9525b92 GH |
57 | #ifndef tzname /* For SGI. */ |
58 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
59 | #endif | |
79dcdf51 MV |
60 | #if defined (__MINGW32__) |
61 | # define tzname _tzname | |
62 | #endif | |
b9525b92 | 63 | |
4d3bacdd JB |
64 | #ifdef MISSING_STRPTIME_DECL |
65 | extern char *strptime (); | |
66 | #endif | |
67 | ||
0f2d19dd JB |
68 | #ifdef __STDC__ |
69 | # define timet time_t | |
70 | #else | |
71 | # define timet long | |
72 | #endif | |
73 | ||
74 | #ifdef HAVE_TIMES | |
0f2d19dd | 75 | static |
1c299a6b | 76 | timet mytime() |
0f2d19dd JB |
77 | { |
78 | struct tms time_buffer; | |
79 | times(&time_buffer); | |
80 | return time_buffer.tms_utime + time_buffer.tms_stime; | |
81 | } | |
82 | #else | |
83 | # ifdef LACK_CLOCK | |
756414cf | 84 | # define mytime() ((time((timet*)0) - scm_your_base) * SCM_TIME_UNITS_PER_SECOND) |
0f2d19dd JB |
85 | # else |
86 | # define mytime clock | |
87 | # endif | |
88 | #endif | |
89 | ||
0f2d19dd | 90 | #ifdef HAVE_FTIME |
0f2d19dd | 91 | struct timeb scm_your_base = {0}; |
b450f070 GB |
92 | #else |
93 | timet scm_your_base = 0; | |
94 | #endif | |
1bbd0b84 | 95 | |
1c299a6b | 96 | SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0, |
1bbd0b84 | 97 | (), |
1e6808ea MG |
98 | "Return the number of time units since the interpreter was\n" |
99 | "started.") | |
1bbd0b84 | 100 | #define FUNC_NAME s_scm_get_internal_real_time |
0f2d19dd | 101 | { |
b450f070 | 102 | #ifdef HAVE_FTIME |
0f2d19dd | 103 | struct timeb time_buffer; |
55c4d089 JB |
104 | |
105 | SCM tmp; | |
106 | ftime (&time_buffer); | |
0f2d19dd | 107 | time_buffer.time -= scm_your_base.time; |
55c4d089 JB |
108 | tmp = scm_long2num (time_buffer.millitm - scm_your_base.millitm); |
109 | tmp = scm_sum (tmp, | |
110 | scm_product (SCM_MAKINUM (1000), | |
111 | SCM_MAKINUM (time_buffer.time))); | |
756414cf | 112 | return scm_quotient (scm_product (tmp, SCM_MAKINUM (SCM_TIME_UNITS_PER_SECOND)), |
55c4d089 | 113 | SCM_MAKINUM (1000)); |
0f2d19dd | 114 | #else |
756414cf | 115 | return scm_long2num((time((timet*)0) - scm_your_base) * (int)SCM_TIME_UNITS_PER_SECOND); |
b450f070 | 116 | #endif /* HAVE_FTIME */ |
0f2d19dd | 117 | } |
1bbd0b84 GB |
118 | #undef FUNC_NAME |
119 | ||
0f2d19dd | 120 | |
f25f761d | 121 | #ifdef HAVE_TIMES |
1c299a6b | 122 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 123 | (void), |
1e6808ea MG |
124 | "Return an object with information about real and processor\n" |
125 | "time. The following procedures accept such an object as an\n" | |
126 | "argument and return a selected component:\n" | |
127 | "\n" | |
b380b885 MD |
128 | "@table @code\n" |
129 | "@item tms:clock\n" | |
130 | "The current real time, expressed as time units relative to an\n" | |
131 | "arbitrary base.\n" | |
132 | "@item tms:utime\n" | |
133 | "The CPU time units used by the calling process.\n" | |
134 | "@item tms:stime\n" | |
1e6808ea MG |
135 | "The CPU time units used by the system on behalf of the calling\n" |
136 | "process.\n" | |
b380b885 | 137 | "@item tms:cutime\n" |
1e6808ea MG |
138 | "The CPU time units used by terminated child processes of the\n" |
139 | "calling process, whose status has been collected (e.g., using\n" | |
140 | "@code{waitpid}).\n" | |
b380b885 | 141 | "@item tms:cstime\n" |
1e6808ea | 142 | "Similarly, the CPU times units used by the system on behalf of\n" |
b380b885 MD |
143 | "terminated child processes.\n" |
144 | "@end table") | |
1bbd0b84 | 145 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 146 | { |
6afcd3b2 GH |
147 | struct tms t; |
148 | clock_t rv; | |
149 | ||
00ffa0e7 | 150 | SCM result = scm_c_make_vector (5, SCM_UNDEFINED); |
6afcd3b2 GH |
151 | rv = times (&t); |
152 | if (rv == -1) | |
1bbd0b84 | 153 | SCM_SYSERROR; |
34d19ef6 HWN |
154 | SCM_VECTOR_SET (result, 0, scm_long2num (rv)); |
155 | SCM_VECTOR_SET (result, 1, scm_long2num (t.tms_utime)); | |
156 | SCM_VECTOR_SET (result, 2, scm_long2num (t.tms_stime)); | |
157 | SCM_VECTOR_SET (result ,3, scm_long2num (t.tms_cutime)); | |
158 | SCM_VECTOR_SET (result, 4, scm_long2num (t.tms_cstime)); | |
6afcd3b2 | 159 | return result; |
6afcd3b2 | 160 | } |
1bbd0b84 | 161 | #undef FUNC_NAME |
f25f761d | 162 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 163 | |
0f2d19dd JB |
164 | static long scm_my_base = 0; |
165 | ||
1c299a6b ML |
166 | long |
167 | scm_c_get_internal_run_time () | |
168 | { | |
169 | return mytime () - scm_my_base; | |
170 | } | |
171 | ||
172 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, | |
1bbd0b84 | 173 | (void), |
1e6808ea MG |
174 | "Return the number of time units of processor time used by the\n" |
175 | "interpreter. Both @emph{system} and @emph{user} time are\n" | |
176 | "included but subprocesses are not.") | |
1bbd0b84 | 177 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 178 | { |
1c299a6b | 179 | return scm_long2num (scm_c_get_internal_run_time ()); |
0f2d19dd | 180 | } |
1bbd0b84 | 181 | #undef FUNC_NAME |
0f2d19dd | 182 | |
1c299a6b | 183 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 184 | (void), |
1e6808ea MG |
185 | "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n" |
186 | "excluding leap seconds.") | |
1bbd0b84 | 187 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 188 | { |
19468eff GH |
189 | timet timv; |
190 | ||
191 | SCM_DEFER_INTS; | |
192 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 193 | SCM_SYSERROR; |
19468eff GH |
194 | SCM_ALLOW_INTS; |
195 | return scm_long2num((long) timv); | |
196 | } | |
1bbd0b84 | 197 | #undef FUNC_NAME |
19468eff | 198 | |
1c299a6b | 199 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 200 | (void), |
1e6808ea MG |
201 | "Return a pair containing the number of seconds and microseconds\n" |
202 | "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n" | |
203 | "whether true microsecond resolution is available depends on the\n" | |
204 | "operating system.") | |
1bbd0b84 | 205 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
206 | { |
207 | #ifdef HAVE_GETTIMEOFDAY | |
208 | struct timeval time; | |
209 | ||
210 | SCM_DEFER_INTS; | |
211 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 212 | SCM_SYSERROR; |
19468eff GH |
213 | SCM_ALLOW_INTS; |
214 | return scm_cons (scm_long2num ((long) time.tv_sec), | |
215 | scm_long2num ((long) time.tv_usec)); | |
216 | #else | |
217 | # ifdef HAVE_FTIME | |
218 | struct timeb time; | |
219 | ||
220 | ftime(&time); | |
1c299a6b | 221 | return scm_cons (scm_long2num ((long) time.time), |
9a81afca | 222 | SCM_MAKINUM (time.millitm * 1000)); |
19468eff GH |
223 | # else |
224 | timet timv; | |
1c299a6b | 225 | |
19468eff GH |
226 | SCM_DEFER_INTS; |
227 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 228 | SCM_SYSERROR; |
19468eff GH |
229 | SCM_ALLOW_INTS; |
230 | return scm_cons (scm_long2num (timv), SCM_MAKINUM (0)); | |
231 | # endif | |
232 | #endif | |
233 | } | |
1bbd0b84 | 234 | #undef FUNC_NAME |
19468eff GH |
235 | |
236 | static SCM | |
237 | filltime (struct tm *bd_time, int zoff, char *zname) | |
238 | { | |
00ffa0e7 | 239 | SCM result = scm_c_make_vector (11, SCM_UNDEFINED); |
19468eff | 240 | |
34d19ef6 HWN |
241 | SCM_VECTOR_SET (result,0, SCM_MAKINUM (bd_time->tm_sec)); |
242 | SCM_VECTOR_SET (result,1, SCM_MAKINUM (bd_time->tm_min)); | |
243 | SCM_VECTOR_SET (result,2, SCM_MAKINUM (bd_time->tm_hour)); | |
244 | SCM_VECTOR_SET (result,3, SCM_MAKINUM (bd_time->tm_mday)); | |
245 | SCM_VECTOR_SET (result,4, SCM_MAKINUM (bd_time->tm_mon)); | |
246 | SCM_VECTOR_SET (result,5, SCM_MAKINUM (bd_time->tm_year)); | |
247 | SCM_VECTOR_SET (result,6, SCM_MAKINUM (bd_time->tm_wday)); | |
248 | SCM_VECTOR_SET (result,7, SCM_MAKINUM (bd_time->tm_yday)); | |
249 | SCM_VECTOR_SET (result,8, SCM_MAKINUM (bd_time->tm_isdst)); | |
250 | SCM_VECTOR_SET (result,9, SCM_MAKINUM (zoff)); | |
251 | SCM_VECTOR_SET (result,10, zname ? scm_makfrom0str (zname) : SCM_BOOL_F); | |
19468eff GH |
252 | return result; |
253 | } | |
254 | ||
ef9ff3fd GH |
255 | static char tzvar[3] = "TZ"; |
256 | extern char ** environ; | |
257 | ||
38c1d3c4 GH |
258 | /* if zone is set, create a temporary environment with only a TZ |
259 | string. other threads or interrupt handlers shouldn't be allowed | |
260 | to run until the corresponding restorezone is called. hence the use | |
261 | of a static variable for tmpenv is no big deal. */ | |
ef9ff3fd | 262 | static char ** |
3eeba8d4 | 263 | setzone (SCM zone, int pos, const char *subr) |
b9525b92 | 264 | { |
ef9ff3fd | 265 | char **oldenv = 0; |
b9525b92 GH |
266 | |
267 | if (!SCM_UNBNDP (zone)) | |
268 | { | |
ef9ff3fd | 269 | static char *tmpenv[2]; |
b9525b92 GH |
270 | char *buf; |
271 | ||
9fd38a3d | 272 | SCM_ASSERT (SCM_STRINGP (zone), zone, pos, subr); |
4c9419ac | 273 | buf = scm_malloc (SCM_STRING_LENGTH (zone) + sizeof (tzvar) + 1); |
a6d9e5ab | 274 | sprintf (buf, "%s=%s", tzvar, SCM_STRING_CHARS (zone)); |
ef9ff3fd GH |
275 | oldenv = environ; |
276 | tmpenv[0] = buf; | |
277 | tmpenv[1] = 0; | |
278 | environ = tmpenv; | |
b9525b92 | 279 | } |
ef9ff3fd | 280 | return oldenv; |
b9525b92 GH |
281 | } |
282 | ||
283 | static void | |
e81d98ec | 284 | restorezone (SCM zone, char **oldenv, const char *subr SCM_UNUSED) |
b9525b92 GH |
285 | { |
286 | if (!SCM_UNBNDP (zone)) | |
287 | { | |
4c9419ac | 288 | free (environ[0]); |
ef9ff3fd | 289 | environ = oldenv; |
38c1d3c4 GH |
290 | #ifdef HAVE_TZSET |
291 | /* for the possible benefit of user code linked with libguile. */ | |
b9525b92 | 292 | tzset(); |
38c1d3c4 | 293 | #endif |
b9525b92 GH |
294 | } |
295 | } | |
296 | ||
1c299a6b | 297 | SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0, |
1bbd0b84 | 298 | (SCM time, SCM zone), |
1e6808ea MG |
299 | "Return an object representing the broken down components of\n" |
300 | "@var{time}, an integer like the one returned by\n" | |
301 | "@code{current-time}. The time zone for the calculation is\n" | |
302 | "optionally specified by @var{zone} (a string), otherwise the\n" | |
303 | "@code{TZ} environment variable or the system default is used.") | |
1bbd0b84 | 304 | #define FUNC_NAME s_scm_localtime |
19468eff GH |
305 | { |
306 | timet itime; | |
4edc089c | 307 | struct tm *ltptr, lt, *utc; |
19468eff GH |
308 | SCM result; |
309 | int zoff; | |
310 | char *zname = 0; | |
ef9ff3fd | 311 | char **oldenv; |
19468eff GH |
312 | int err; |
313 | ||
e4b265d8 | 314 | itime = SCM_NUM2LONG (1, time); |
38c1d3c4 GH |
315 | |
316 | /* deferring interupts is essential since a) setzone may install a temporary | |
317 | environment b) localtime uses a static buffer. */ | |
19468eff | 318 | SCM_DEFER_INTS; |
1bbd0b84 | 319 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
320 | #ifdef LOCALTIME_CACHE |
321 | tzset (); | |
322 | #endif | |
4edc089c | 323 | ltptr = localtime (&itime); |
19468eff | 324 | err = errno; |
4edc089c | 325 | if (ltptr) |
19468eff | 326 | { |
4d3bacdd | 327 | const char *ptr; |
ef9ff3fd | 328 | |
43ff3170 GH |
329 | /* copy zone name before calling gmtime or restoring zone. */ |
330 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 331 | ptr = ltptr->tm_zone; |
43ff3170 | 332 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 333 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
334 | #else |
335 | ptr = ""; | |
b9525b92 | 336 | #endif |
4c9419ac | 337 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 338 | strcpy (zname, ptr); |
19468eff | 339 | } |
ef9ff3fd GH |
340 | /* the struct is copied in case localtime and gmtime share a buffer. */ |
341 | if (ltptr) | |
342 | lt = *ltptr; | |
343 | utc = gmtime (&itime); | |
344 | if (utc == NULL) | |
345 | err = errno; | |
1bbd0b84 | 346 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 347 | /* delayed until zone has been restored. */ |
19468eff | 348 | errno = err; |
4edc089c | 349 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 350 | SCM_SYSERROR; |
19468eff GH |
351 | |
352 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
353 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
354 | + utc->tm_sec - lt.tm_sec; | |
355 | if (utc->tm_year < lt.tm_year) | |
19468eff | 356 | zoff -= 24 * 60 * 60; |
4edc089c | 357 | else if (utc->tm_year > lt.tm_year) |
19468eff | 358 | zoff += 24 * 60 * 60; |
4edc089c | 359 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 360 | zoff -= 24 * 60 * 60; |
4edc089c | 361 | else if (utc->tm_yday > lt.tm_yday) |
19468eff | 362 | zoff += 24 * 60 * 60; |
1c299a6b | 363 | |
4edc089c | 364 | result = filltime (<, zoff, zname); |
19468eff | 365 | SCM_ALLOW_INTS; |
4c9419ac MV |
366 | if (zname) |
367 | free (zname); | |
19468eff GH |
368 | return result; |
369 | } | |
1bbd0b84 | 370 | #undef FUNC_NAME |
19468eff | 371 | |
1c299a6b | 372 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 373 | (SCM time), |
1e6808ea MG |
374 | "Return an object representing the broken down components of\n" |
375 | "@var{time}, an integer like the one returned by\n" | |
376 | "@code{current-time}. The values are calculated for UTC.") | |
1bbd0b84 | 377 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
378 | { |
379 | timet itime; | |
380 | struct tm *bd_time; | |
381 | SCM result; | |
382 | ||
e4b265d8 | 383 | itime = SCM_NUM2LONG (1, time); |
19468eff GH |
384 | SCM_DEFER_INTS; |
385 | bd_time = gmtime (&itime); | |
386 | if (bd_time == NULL) | |
1bbd0b84 | 387 | SCM_SYSERROR; |
19468eff GH |
388 | result = filltime (bd_time, 0, "GMT"); |
389 | SCM_ALLOW_INTS; | |
390 | return result; | |
391 | } | |
1bbd0b84 | 392 | #undef FUNC_NAME |
19468eff | 393 | |
b9525b92 GH |
394 | /* copy time components from a Scheme object to a struct tm. */ |
395 | static void | |
3eeba8d4 | 396 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 397 | { |
34d19ef6 | 398 | SCM const *velts; |
55a7fc62 GH |
399 | int i; |
400 | ||
0c95b57d | 401 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
9fd38a3d | 402 | && SCM_VECTOR_LENGTH (sbd_time) == 11, |
b9525b92 | 403 | sbd_time, pos, subr); |
55a7fc62 GH |
404 | velts = SCM_VELTS (sbd_time); |
405 | for (i = 0; i < 10; i++) | |
406 | { | |
407 | SCM_ASSERT (SCM_INUMP (velts[i]), sbd_time, pos, subr); | |
408 | } | |
0c95b57d | 409 | SCM_ASSERT (SCM_FALSEP (velts[10]) || SCM_STRINGP (velts[10]), |
55a7fc62 GH |
410 | sbd_time, pos, subr); |
411 | ||
412 | lt->tm_sec = SCM_INUM (velts[0]); | |
413 | lt->tm_min = SCM_INUM (velts[1]); | |
414 | lt->tm_hour = SCM_INUM (velts[2]); | |
415 | lt->tm_mday = SCM_INUM (velts[3]); | |
416 | lt->tm_mon = SCM_INUM (velts[4]); | |
417 | lt->tm_year = SCM_INUM (velts[5]); | |
418 | lt->tm_wday = SCM_INUM (velts[6]); | |
419 | lt->tm_yday = SCM_INUM (velts[7]); | |
420 | lt->tm_isdst = SCM_INUM (velts[8]); | |
c7abe4f3 | 421 | #ifdef HAVE_TM_ZONE |
55a7fc62 GH |
422 | lt->tm_gmtoff = SCM_INUM (velts[9]); |
423 | if (SCM_FALSEP (velts[10])) | |
424 | lt->tm_zone = NULL; | |
425 | else | |
a002f1a2 | 426 | lt->tm_zone = SCM_STRING_CHARS (velts[10]); |
c7abe4f3 | 427 | #endif |
b9525b92 GH |
428 | } |
429 | ||
1c299a6b | 430 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 431 | (SCM sbd_time, SCM zone), |
a3c8b9fc MD |
432 | "@var{bd-time} is an object representing broken down time and @code{zone}\n" |
433 | "is an optional time zone specifier (otherwise the TZ environment variable\n" | |
434 | "or the system default is used).\n\n" | |
a8eac221 | 435 | "Returns a pair: the car is a corresponding\n" |
a3c8b9fc | 436 | "integer time value like that returned\n" |
a8eac221 | 437 | "by @code{current-time}; the cdr is a broken down time object, similar to\n" |
a3c8b9fc | 438 | "as @var{bd-time} but with normalized values.") |
1bbd0b84 | 439 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
440 | { |
441 | timet itime; | |
442 | struct tm lt, *utc; | |
443 | SCM result; | |
444 | int zoff; | |
445 | char *zname = 0; | |
ef9ff3fd | 446 | char **oldenv; |
b9525b92 GH |
447 | int err; |
448 | ||
1bbd0b84 | 449 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
19468eff GH |
450 | |
451 | SCM_DEFER_INTS; | |
1bbd0b84 | 452 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
453 | #ifdef LOCALTIME_CACHE |
454 | tzset (); | |
455 | #endif | |
19468eff | 456 | itime = mktime (<); |
b9525b92 | 457 | err = errno; |
19468eff | 458 | |
b9525b92 GH |
459 | if (itime != -1) |
460 | { | |
4d3bacdd | 461 | const char *ptr; |
ef9ff3fd | 462 | |
43ff3170 GH |
463 | /* copy zone name before calling gmtime or restoring the zone. */ |
464 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 465 | ptr = lt.tm_zone; |
43ff3170 | 466 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 467 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
468 | #else |
469 | ptr = ""; | |
b9525b92 | 470 | #endif |
4c9419ac | 471 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 472 | strcpy (zname, ptr); |
b9525b92 | 473 | } |
ef9ff3fd GH |
474 | |
475 | /* get timezone offset in seconds west of UTC. */ | |
476 | utc = gmtime (&itime); | |
477 | if (utc == NULL) | |
478 | err = errno; | |
479 | ||
1bbd0b84 | 480 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
481 | /* delayed until zone has been restored. */ |
482 | errno = err; | |
483 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 484 | SCM_SYSERROR; |
b9525b92 | 485 | |
19468eff GH |
486 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
487 | + utc->tm_sec - lt.tm_sec; | |
488 | if (utc->tm_year < lt.tm_year) | |
489 | zoff -= 24 * 60 * 60; | |
490 | else if (utc->tm_year > lt.tm_year) | |
491 | zoff += 24 * 60 * 60; | |
492 | else if (utc->tm_yday < lt.tm_yday) | |
493 | zoff -= 24 * 60 * 60; | |
494 | else if (utc->tm_yday > lt.tm_yday) | |
495 | zoff += 24 * 60 * 60; | |
496 | ||
19468eff GH |
497 | result = scm_cons (scm_long2num ((long) itime), |
498 | filltime (<, zoff, zname)); | |
499 | SCM_ALLOW_INTS; | |
4c9419ac MV |
500 | if (zname) |
501 | free (zname); | |
19468eff | 502 | return result; |
0f2d19dd | 503 | } |
1bbd0b84 | 504 | #undef FUNC_NAME |
0f2d19dd | 505 | |
38c1d3c4 | 506 | #ifdef HAVE_TZSET |
1c299a6b | 507 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 508 | (void), |
a3c8b9fc MD |
509 | "Initialize the timezone from the TZ environment variable\n" |
510 | "or the system default. It's not usually necessary to call this procedure\n" | |
511 | "since it's done automatically by other procedures that depend on the\n" | |
512 | "timezone.") | |
1bbd0b84 | 513 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 514 | { |
19468eff GH |
515 | tzset(); |
516 | return SCM_UNSPECIFIED; | |
0f2d19dd | 517 | } |
1bbd0b84 | 518 | #undef FUNC_NAME |
38c1d3c4 | 519 | #endif /* HAVE_TZSET */ |
0f2d19dd | 520 | |
a1ec6916 | 521 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 522 | (SCM format, SCM stime), |
a3c8b9fc MD |
523 | "Formats a time specification @var{time} using @var{template}. @var{time}\n" |
524 | "is an object with time components in the form returned by @code{localtime}\n" | |
525 | "or @code{gmtime}. @var{template} is a string which can include formatting\n" | |
526 | "specifications introduced by a @code{%} character. The formatting of\n" | |
527 | "month and day names is dependent on the current locale. The value returned\n" | |
528 | "is the formatted string.\n" | |
529 | "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 530 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
531 | { |
532 | struct tm t; | |
533 | ||
534 | char *tbuf; | |
535 | int size = 50; | |
a15e6dcc | 536 | char *fmt, *myfmt; |
b9525b92 | 537 | int len; |
ef9ff3fd | 538 | SCM result; |
b9525b92 | 539 | |
a6d9e5ab | 540 | SCM_VALIDATE_STRING (1, format); |
1bbd0b84 | 541 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 542 | |
a6d9e5ab DH |
543 | fmt = SCM_STRING_CHARS (format); |
544 | len = SCM_STRING_LENGTH (format); | |
b9525b92 | 545 | |
a15e6dcc MV |
546 | /* Ugly hack: strftime can return 0 if its buffer is too small, |
547 | but some valid time strings (e.g. "%p") can sometimes produce | |
548 | a zero-byte output string! Workaround is to prepend a junk | |
549 | character to the format string, so that valid returns are always | |
550 | nonzero. */ | |
4c9419ac | 551 | myfmt = scm_malloc (len+2); |
a15e6dcc MV |
552 | *myfmt = 'x'; |
553 | strncpy(myfmt+1, fmt, len); | |
554 | myfmt[len+1] = 0; | |
555 | ||
4c9419ac | 556 | tbuf = scm_malloc (size); |
b8a1b29b GH |
557 | { |
558 | #if !defined (HAVE_TM_ZONE) | |
559 | /* it seems the only way to tell non-GNU versions of strftime what | |
560 | zone to use (for the %Z format) is to set TZ in the | |
561 | environment. interrupts and thread switching must be deferred | |
562 | until TZ is restored. */ | |
563 | char **oldenv = NULL; | |
2e945bcc | 564 | SCM *velts = (SCM *) SCM_VELTS (stime); |
e652b54f | 565 | int have_zone = 0; |
b8a1b29b | 566 | |
36284627 | 567 | if (!SCM_FALSEP (velts[10]) && *SCM_STRING_CHARS (velts[10]) != 0) |
b8a1b29b GH |
568 | { |
569 | /* it's not required that the TZ setting be correct, just that | |
e652b54f GH |
570 | it has the right name. so try something like TZ=EST0. |
571 | using only TZ=EST would be simpler but it doesn't work on | |
572 | some OSs, e.g., Solaris. */ | |
573 | SCM zone = | |
574 | scm_string_append (scm_cons (velts[10], | |
575 | scm_cons (scm_makfrom0str ("0"), | |
576 | SCM_EOL))); | |
1c299a6b | 577 | |
e652b54f | 578 | have_zone = 1; |
b8a1b29b | 579 | SCM_DEFER_INTS; |
e652b54f | 580 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
b8a1b29b GH |
581 | } |
582 | #endif | |
583 | ||
38c1d3c4 | 584 | #ifdef LOCALTIME_CACHE |
b8a1b29b GH |
585 | tzset (); |
586 | #endif | |
587 | ||
a15e6dcc MV |
588 | /* POSIX says strftime returns 0 on buffer overrun, but old |
589 | systems (i.e. libc 4 on GNU/Linux) might return `size' in that | |
590 | case. */ | |
591 | while ((len = strftime (tbuf, size, myfmt, &t)) == 0 || len == size) | |
b8a1b29b | 592 | { |
4c9419ac | 593 | free (tbuf); |
b8a1b29b | 594 | size *= 2; |
4c9419ac | 595 | tbuf = scm_malloc (size); |
b8a1b29b GH |
596 | } |
597 | ||
598 | #if !defined (HAVE_TM_ZONE) | |
e652b54f | 599 | if (have_zone) |
b8a1b29b GH |
600 | { |
601 | restorezone (velts[10], oldenv, FUNC_NAME); | |
602 | SCM_ALLOW_INTS; | |
603 | } | |
38c1d3c4 | 604 | #endif |
b9525b92 | 605 | } |
b8a1b29b | 606 | |
36284627 | 607 | result = scm_mem2string (tbuf + 1, len - 1); |
4c9419ac MV |
608 | free (tbuf); |
609 | free (myfmt); | |
ef9ff3fd | 610 | return result; |
b9525b92 | 611 | } |
1bbd0b84 | 612 | #undef FUNC_NAME |
b9525b92 | 613 | |
f25f761d | 614 | #ifdef HAVE_STRPTIME |
a1ec6916 | 615 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 616 | (SCM format, SCM string), |
a8eac221 MG |
617 | "Performs the reverse action to @code{strftime}, parsing\n" |
618 | "@var{string} according to the specification supplied in\n" | |
619 | "@var{template}. The interpretation of month and day names is\n" | |
620 | "dependent on the current locale. The value returned is a pair.\n" | |
621 | "The car has an object with time components\n" | |
a3c8b9fc MD |
622 | "in the form returned by @code{localtime} or @code{gmtime},\n" |
623 | "but the time zone components\n" | |
624 | "are not usefully set.\n" | |
a8eac221 MG |
625 | "The cdr reports the number of characters from @var{string}\n" |
626 | "which were used for the conversion.") | |
1bbd0b84 | 627 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 628 | { |
b9525b92 GH |
629 | struct tm t; |
630 | char *fmt, *str, *rest; | |
631 | ||
a6d9e5ab DH |
632 | SCM_VALIDATE_STRING (1, format); |
633 | SCM_VALIDATE_STRING (2, string); | |
b9525b92 | 634 | |
a6d9e5ab DH |
635 | fmt = SCM_STRING_CHARS (format); |
636 | str = SCM_STRING_CHARS (string); | |
b9525b92 GH |
637 | |
638 | /* initialize the struct tm */ | |
639 | #define tm_init(field) t.field = 0 | |
640 | tm_init (tm_sec); | |
641 | tm_init (tm_min); | |
642 | tm_init (tm_hour); | |
643 | tm_init (tm_mday); | |
644 | tm_init (tm_mon); | |
645 | tm_init (tm_year); | |
646 | tm_init (tm_wday); | |
647 | tm_init (tm_yday); | |
648 | #undef tm_init | |
649 | ||
650 | t.tm_isdst = -1; | |
651 | SCM_DEFER_INTS; | |
652 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
1bbd0b84 | 653 | SCM_SYSERROR; |
b9525b92 GH |
654 | |
655 | SCM_ALLOW_INTS; | |
656 | return scm_cons (filltime (&t, 0, NULL), SCM_MAKINUM (rest - str)); | |
b9525b92 | 657 | } |
1bbd0b84 | 658 | #undef FUNC_NAME |
f25f761d | 659 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 660 | |
0f2d19dd JB |
661 | void |
662 | scm_init_stime() | |
0f2d19dd | 663 | { |
86d31dfe | 664 | scm_c_define ("internal-time-units-per-second", |
756414cf | 665 | scm_long2num((long) SCM_TIME_UNITS_PER_SECOND)); |
0f2d19dd JB |
666 | |
667 | #ifdef HAVE_FTIME | |
668 | if (!scm_your_base.time) ftime(&scm_your_base); | |
669 | #else | |
670 | if (!scm_your_base) time(&scm_your_base); | |
671 | #endif | |
672 | ||
673 | if (!scm_my_base) scm_my_base = mytime(); | |
674 | ||
876c87ce | 675 | scm_add_feature ("current-time"); |
a0599745 | 676 | #include "libguile/stime.x" |
0f2d19dd JB |
677 | } |
678 | ||
89e00824 ML |
679 | |
680 | /* | |
681 | Local Variables: | |
682 | c-file-style: "gnu" | |
683 | End: | |
684 | */ |