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 | * |
0f2d19dd JB |
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. | |
1c299a6b | 7 | * |
0f2d19dd JB |
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. | |
1c299a6b | 12 | * |
0f2d19dd JB |
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 | 41 | |
1bbd0b84 | 42 | |
0f2d19dd JB |
43 | \f |
44 | ||
45 | #include <stdio.h> | |
e6e2e95a MD |
46 | #include <errno.h> |
47 | ||
a0599745 MD |
48 | #include "libguile/_scm.h" |
49 | #include "libguile/feature.h" | |
50 | #include "libguile/strings.h" | |
51 | #include "libguile/vectors.h" | |
20e6290e | 52 | |
a0599745 MD |
53 | #include "libguile/validate.h" |
54 | #include "libguile/stime.h" | |
20e6290e | 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 | ||
a15e6dcc MV |
65 | #ifdef HAVE_STRING_H |
66 | #include <string.h> | |
67 | #endif | |
68 | ||
b1978258 GH |
69 | #ifdef HAVE_SYS_TIMES_H |
70 | # include <sys/times.h> | |
71 | #endif | |
72 | ||
73 | #ifdef HAVE_SYS_TIMEB_H | |
74 | # include <sys/timeb.h> | |
75 | #endif | |
0f2d19dd | 76 | |
b9525b92 GH |
77 | #ifndef tzname /* For SGI. */ |
78 | extern char *tzname[]; /* RS6000 and others reject char **tzname. */ | |
79 | #endif | |
79dcdf51 MV |
80 | #if defined (__MINGW32__) |
81 | # define tzname _tzname | |
82 | #endif | |
b9525b92 | 83 | |
4d3bacdd JB |
84 | #ifdef MISSING_STRPTIME_DECL |
85 | extern char *strptime (); | |
86 | #endif | |
87 | ||
0f2d19dd JB |
88 | #ifdef __STDC__ |
89 | # define timet time_t | |
90 | #else | |
91 | # define timet long | |
92 | #endif | |
93 | ||
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; |
55c4d089 JB |
128 | tmp = scm_long2num (time_buffer.millitm - scm_your_base.millitm); |
129 | tmp = scm_sum (tmp, | |
130 | scm_product (SCM_MAKINUM (1000), | |
131 | SCM_MAKINUM (time_buffer.time))); | |
756414cf | 132 | return scm_quotient (scm_product (tmp, SCM_MAKINUM (SCM_TIME_UNITS_PER_SECOND)), |
55c4d089 | 133 | SCM_MAKINUM (1000)); |
0f2d19dd | 134 | #else |
756414cf | 135 | return scm_long2num((time((timet*)0) - scm_your_base) * (int)SCM_TIME_UNITS_PER_SECOND); |
b450f070 | 136 | #endif /* HAVE_FTIME */ |
0f2d19dd | 137 | } |
1bbd0b84 GB |
138 | #undef FUNC_NAME |
139 | ||
0f2d19dd | 140 | |
f25f761d | 141 | #ifdef HAVE_TIMES |
1c299a6b | 142 | SCM_DEFINE (scm_times, "times", 0, 0, 0, |
1bbd0b84 | 143 | (void), |
1e6808ea MG |
144 | "Return an object with information about real and processor\n" |
145 | "time. The following procedures accept such an object as an\n" | |
146 | "argument and return a selected component:\n" | |
147 | "\n" | |
b380b885 MD |
148 | "@table @code\n" |
149 | "@item tms:clock\n" | |
150 | "The current real time, expressed as time units relative to an\n" | |
151 | "arbitrary base.\n" | |
152 | "@item tms:utime\n" | |
153 | "The CPU time units used by the calling process.\n" | |
154 | "@item tms:stime\n" | |
1e6808ea MG |
155 | "The CPU time units used by the system on behalf of the calling\n" |
156 | "process.\n" | |
b380b885 | 157 | "@item tms:cutime\n" |
1e6808ea MG |
158 | "The CPU time units used by terminated child processes of the\n" |
159 | "calling process, whose status has been collected (e.g., using\n" | |
160 | "@code{waitpid}).\n" | |
b380b885 | 161 | "@item tms:cstime\n" |
1e6808ea | 162 | "Similarly, the CPU times units used by the system on behalf of\n" |
b380b885 MD |
163 | "terminated child processes.\n" |
164 | "@end table") | |
1bbd0b84 | 165 | #define FUNC_NAME s_scm_times |
6afcd3b2 | 166 | { |
6afcd3b2 GH |
167 | struct tms t; |
168 | clock_t rv; | |
169 | ||
00ffa0e7 | 170 | SCM result = scm_c_make_vector (5, SCM_UNDEFINED); |
6afcd3b2 GH |
171 | rv = times (&t); |
172 | if (rv == -1) | |
1bbd0b84 | 173 | SCM_SYSERROR; |
34d19ef6 HWN |
174 | SCM_VECTOR_SET (result, 0, scm_long2num (rv)); |
175 | SCM_VECTOR_SET (result, 1, scm_long2num (t.tms_utime)); | |
176 | SCM_VECTOR_SET (result, 2, scm_long2num (t.tms_stime)); | |
177 | SCM_VECTOR_SET (result ,3, scm_long2num (t.tms_cutime)); | |
178 | SCM_VECTOR_SET (result, 4, scm_long2num (t.tms_cstime)); | |
6afcd3b2 | 179 | return result; |
6afcd3b2 | 180 | } |
1bbd0b84 | 181 | #undef FUNC_NAME |
f25f761d | 182 | #endif /* HAVE_TIMES */ |
6afcd3b2 | 183 | |
0f2d19dd JB |
184 | static long scm_my_base = 0; |
185 | ||
1c299a6b ML |
186 | long |
187 | scm_c_get_internal_run_time () | |
188 | { | |
189 | return mytime () - scm_my_base; | |
190 | } | |
191 | ||
192 | SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0, | |
1bbd0b84 | 193 | (void), |
1e6808ea MG |
194 | "Return the number of time units of processor time used by the\n" |
195 | "interpreter. Both @emph{system} and @emph{user} time are\n" | |
196 | "included but subprocesses are not.") | |
1bbd0b84 | 197 | #define FUNC_NAME s_scm_get_internal_run_time |
0f2d19dd | 198 | { |
1c299a6b | 199 | return scm_long2num (scm_c_get_internal_run_time ()); |
0f2d19dd | 200 | } |
1bbd0b84 | 201 | #undef FUNC_NAME |
0f2d19dd | 202 | |
1c299a6b | 203 | SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0, |
1bbd0b84 | 204 | (void), |
1e6808ea MG |
205 | "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n" |
206 | "excluding leap seconds.") | |
1bbd0b84 | 207 | #define FUNC_NAME s_scm_current_time |
0f2d19dd | 208 | { |
19468eff GH |
209 | timet timv; |
210 | ||
211 | SCM_DEFER_INTS; | |
212 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 213 | SCM_SYSERROR; |
19468eff GH |
214 | SCM_ALLOW_INTS; |
215 | return scm_long2num((long) timv); | |
216 | } | |
1bbd0b84 | 217 | #undef FUNC_NAME |
19468eff | 218 | |
1c299a6b | 219 | SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0, |
1bbd0b84 | 220 | (void), |
1e6808ea MG |
221 | "Return a pair containing the number of seconds and microseconds\n" |
222 | "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n" | |
223 | "whether true microsecond resolution is available depends on the\n" | |
224 | "operating system.") | |
1bbd0b84 | 225 | #define FUNC_NAME s_scm_gettimeofday |
19468eff GH |
226 | { |
227 | #ifdef HAVE_GETTIMEOFDAY | |
228 | struct timeval time; | |
229 | ||
230 | SCM_DEFER_INTS; | |
231 | if (gettimeofday (&time, NULL) == -1) | |
1bbd0b84 | 232 | SCM_SYSERROR; |
19468eff GH |
233 | SCM_ALLOW_INTS; |
234 | return scm_cons (scm_long2num ((long) time.tv_sec), | |
235 | scm_long2num ((long) time.tv_usec)); | |
236 | #else | |
237 | # ifdef HAVE_FTIME | |
238 | struct timeb time; | |
239 | ||
240 | ftime(&time); | |
1c299a6b | 241 | return scm_cons (scm_long2num ((long) time.time), |
9a81afca | 242 | SCM_MAKINUM (time.millitm * 1000)); |
19468eff GH |
243 | # else |
244 | timet timv; | |
1c299a6b | 245 | |
19468eff GH |
246 | SCM_DEFER_INTS; |
247 | if ((timv = time (0)) == -1) | |
1bbd0b84 | 248 | SCM_SYSERROR; |
19468eff GH |
249 | SCM_ALLOW_INTS; |
250 | return scm_cons (scm_long2num (timv), SCM_MAKINUM (0)); | |
251 | # endif | |
252 | #endif | |
253 | } | |
1bbd0b84 | 254 | #undef FUNC_NAME |
19468eff GH |
255 | |
256 | static SCM | |
257 | filltime (struct tm *bd_time, int zoff, char *zname) | |
258 | { | |
00ffa0e7 | 259 | SCM result = scm_c_make_vector (11, SCM_UNDEFINED); |
19468eff | 260 | |
34d19ef6 HWN |
261 | SCM_VECTOR_SET (result,0, SCM_MAKINUM (bd_time->tm_sec)); |
262 | SCM_VECTOR_SET (result,1, SCM_MAKINUM (bd_time->tm_min)); | |
263 | SCM_VECTOR_SET (result,2, SCM_MAKINUM (bd_time->tm_hour)); | |
264 | SCM_VECTOR_SET (result,3, SCM_MAKINUM (bd_time->tm_mday)); | |
265 | SCM_VECTOR_SET (result,4, SCM_MAKINUM (bd_time->tm_mon)); | |
266 | SCM_VECTOR_SET (result,5, SCM_MAKINUM (bd_time->tm_year)); | |
267 | SCM_VECTOR_SET (result,6, SCM_MAKINUM (bd_time->tm_wday)); | |
268 | SCM_VECTOR_SET (result,7, SCM_MAKINUM (bd_time->tm_yday)); | |
269 | SCM_VECTOR_SET (result,8, SCM_MAKINUM (bd_time->tm_isdst)); | |
270 | SCM_VECTOR_SET (result,9, SCM_MAKINUM (zoff)); | |
271 | SCM_VECTOR_SET (result,10, zname ? scm_makfrom0str (zname) : SCM_BOOL_F); | |
19468eff GH |
272 | return result; |
273 | } | |
274 | ||
ef9ff3fd GH |
275 | static char tzvar[3] = "TZ"; |
276 | extern char ** environ; | |
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 | |
4edc089c | 343 | ltptr = localtime (&itime); |
19468eff | 344 | err = errno; |
4edc089c | 345 | if (ltptr) |
19468eff | 346 | { |
4d3bacdd | 347 | const char *ptr; |
ef9ff3fd | 348 | |
43ff3170 GH |
349 | /* copy zone name before calling gmtime or restoring zone. */ |
350 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 351 | ptr = ltptr->tm_zone; |
43ff3170 | 352 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 353 | ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
354 | #else |
355 | ptr = ""; | |
b9525b92 | 356 | #endif |
4c9419ac | 357 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 358 | strcpy (zname, ptr); |
19468eff | 359 | } |
ef9ff3fd GH |
360 | /* the struct is copied in case localtime and gmtime share a buffer. */ |
361 | if (ltptr) | |
362 | lt = *ltptr; | |
363 | utc = gmtime (&itime); | |
364 | if (utc == NULL) | |
365 | err = errno; | |
1bbd0b84 | 366 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 | 367 | /* delayed until zone has been restored. */ |
19468eff | 368 | errno = err; |
4edc089c | 369 | if (utc == NULL || ltptr == NULL) |
1bbd0b84 | 370 | SCM_SYSERROR; |
19468eff GH |
371 | |
372 | /* calculate timezone offset in seconds west of UTC. */ | |
4edc089c GH |
373 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
374 | + utc->tm_sec - lt.tm_sec; | |
375 | if (utc->tm_year < lt.tm_year) | |
19468eff | 376 | zoff -= 24 * 60 * 60; |
4edc089c | 377 | else if (utc->tm_year > lt.tm_year) |
19468eff | 378 | zoff += 24 * 60 * 60; |
4edc089c | 379 | else if (utc->tm_yday < lt.tm_yday) |
19468eff | 380 | zoff -= 24 * 60 * 60; |
4edc089c | 381 | else if (utc->tm_yday > lt.tm_yday) |
19468eff | 382 | zoff += 24 * 60 * 60; |
1c299a6b | 383 | |
4edc089c | 384 | result = filltime (<, zoff, zname); |
19468eff | 385 | SCM_ALLOW_INTS; |
4c9419ac MV |
386 | if (zname) |
387 | free (zname); | |
19468eff GH |
388 | return result; |
389 | } | |
1bbd0b84 | 390 | #undef FUNC_NAME |
19468eff | 391 | |
1c299a6b | 392 | SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0, |
1bbd0b84 | 393 | (SCM time), |
1e6808ea MG |
394 | "Return an object representing the broken down components of\n" |
395 | "@var{time}, an integer like the one returned by\n" | |
396 | "@code{current-time}. The values are calculated for UTC.") | |
1bbd0b84 | 397 | #define FUNC_NAME s_scm_gmtime |
19468eff GH |
398 | { |
399 | timet itime; | |
400 | struct tm *bd_time; | |
401 | SCM result; | |
402 | ||
e4b265d8 | 403 | itime = SCM_NUM2LONG (1, time); |
19468eff GH |
404 | SCM_DEFER_INTS; |
405 | bd_time = gmtime (&itime); | |
406 | if (bd_time == NULL) | |
1bbd0b84 | 407 | SCM_SYSERROR; |
19468eff GH |
408 | result = filltime (bd_time, 0, "GMT"); |
409 | SCM_ALLOW_INTS; | |
410 | return result; | |
411 | } | |
1bbd0b84 | 412 | #undef FUNC_NAME |
19468eff | 413 | |
b9525b92 GH |
414 | /* copy time components from a Scheme object to a struct tm. */ |
415 | static void | |
3eeba8d4 | 416 | bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr) |
19468eff | 417 | { |
34d19ef6 | 418 | SCM const *velts; |
55a7fc62 GH |
419 | int i; |
420 | ||
0c95b57d | 421 | SCM_ASSERT (SCM_VECTORP (sbd_time) |
9fd38a3d | 422 | && SCM_VECTOR_LENGTH (sbd_time) == 11, |
b9525b92 | 423 | sbd_time, pos, subr); |
55a7fc62 GH |
424 | velts = SCM_VELTS (sbd_time); |
425 | for (i = 0; i < 10; i++) | |
426 | { | |
427 | SCM_ASSERT (SCM_INUMP (velts[i]), sbd_time, pos, subr); | |
428 | } | |
0c95b57d | 429 | SCM_ASSERT (SCM_FALSEP (velts[10]) || SCM_STRINGP (velts[10]), |
55a7fc62 GH |
430 | sbd_time, pos, subr); |
431 | ||
432 | lt->tm_sec = SCM_INUM (velts[0]); | |
433 | lt->tm_min = SCM_INUM (velts[1]); | |
434 | lt->tm_hour = SCM_INUM (velts[2]); | |
435 | lt->tm_mday = SCM_INUM (velts[3]); | |
436 | lt->tm_mon = SCM_INUM (velts[4]); | |
437 | lt->tm_year = SCM_INUM (velts[5]); | |
438 | lt->tm_wday = SCM_INUM (velts[6]); | |
439 | lt->tm_yday = SCM_INUM (velts[7]); | |
440 | lt->tm_isdst = SCM_INUM (velts[8]); | |
c7abe4f3 | 441 | #ifdef HAVE_TM_ZONE |
55a7fc62 GH |
442 | lt->tm_gmtoff = SCM_INUM (velts[9]); |
443 | if (SCM_FALSEP (velts[10])) | |
444 | lt->tm_zone = NULL; | |
445 | else | |
a002f1a2 | 446 | lt->tm_zone = SCM_STRING_CHARS (velts[10]); |
c7abe4f3 | 447 | #endif |
b9525b92 GH |
448 | } |
449 | ||
1c299a6b | 450 | SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0, |
1bbd0b84 | 451 | (SCM sbd_time, SCM zone), |
a3c8b9fc MD |
452 | "@var{bd-time} is an object representing broken down time and @code{zone}\n" |
453 | "is an optional time zone specifier (otherwise the TZ environment variable\n" | |
454 | "or the system default is used).\n\n" | |
a8eac221 | 455 | "Returns a pair: the car is a corresponding\n" |
a3c8b9fc | 456 | "integer time value like that returned\n" |
a8eac221 | 457 | "by @code{current-time}; the cdr is a broken down time object, similar to\n" |
a3c8b9fc | 458 | "as @var{bd-time} but with normalized values.") |
1bbd0b84 | 459 | #define FUNC_NAME s_scm_mktime |
b9525b92 GH |
460 | { |
461 | timet itime; | |
462 | struct tm lt, *utc; | |
463 | SCM result; | |
464 | int zoff; | |
465 | char *zname = 0; | |
ef9ff3fd | 466 | char **oldenv; |
b9525b92 GH |
467 | int err; |
468 | ||
1bbd0b84 | 469 | bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME); |
19468eff GH |
470 | |
471 | SCM_DEFER_INTS; | |
1bbd0b84 | 472 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
38c1d3c4 GH |
473 | #ifdef LOCALTIME_CACHE |
474 | tzset (); | |
475 | #endif | |
19468eff | 476 | itime = mktime (<); |
b9525b92 | 477 | err = errno; |
19468eff | 478 | |
b9525b92 GH |
479 | if (itime != -1) |
480 | { | |
4d3bacdd | 481 | const char *ptr; |
ef9ff3fd | 482 | |
43ff3170 GH |
483 | /* copy zone name before calling gmtime or restoring the zone. */ |
484 | #if defined (HAVE_TM_ZONE) | |
ef9ff3fd | 485 | ptr = lt.tm_zone; |
43ff3170 | 486 | #elif defined (HAVE_TZNAME) |
ef9ff3fd | 487 | ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ]; |
43ff3170 GH |
488 | #else |
489 | ptr = ""; | |
b9525b92 | 490 | #endif |
4c9419ac | 491 | zname = scm_malloc (strlen (ptr) + 1); |
ef9ff3fd | 492 | strcpy (zname, ptr); |
b9525b92 | 493 | } |
ef9ff3fd GH |
494 | |
495 | /* get timezone offset in seconds west of UTC. */ | |
496 | utc = gmtime (&itime); | |
497 | if (utc == NULL) | |
498 | err = errno; | |
499 | ||
1bbd0b84 | 500 | restorezone (zone, oldenv, FUNC_NAME); |
b9525b92 GH |
501 | /* delayed until zone has been restored. */ |
502 | errno = err; | |
503 | if (utc == NULL || itime == -1) | |
1bbd0b84 | 504 | SCM_SYSERROR; |
b9525b92 | 505 | |
19468eff GH |
506 | zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60 |
507 | + utc->tm_sec - lt.tm_sec; | |
508 | if (utc->tm_year < lt.tm_year) | |
509 | zoff -= 24 * 60 * 60; | |
510 | else if (utc->tm_year > lt.tm_year) | |
511 | zoff += 24 * 60 * 60; | |
512 | else if (utc->tm_yday < lt.tm_yday) | |
513 | zoff -= 24 * 60 * 60; | |
514 | else if (utc->tm_yday > lt.tm_yday) | |
515 | zoff += 24 * 60 * 60; | |
516 | ||
19468eff GH |
517 | result = scm_cons (scm_long2num ((long) itime), |
518 | filltime (<, zoff, zname)); | |
519 | SCM_ALLOW_INTS; | |
4c9419ac MV |
520 | if (zname) |
521 | free (zname); | |
19468eff | 522 | return result; |
0f2d19dd | 523 | } |
1bbd0b84 | 524 | #undef FUNC_NAME |
0f2d19dd | 525 | |
38c1d3c4 | 526 | #ifdef HAVE_TZSET |
1c299a6b | 527 | SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0, |
1bbd0b84 | 528 | (void), |
a3c8b9fc MD |
529 | "Initialize the timezone from the TZ environment variable\n" |
530 | "or the system default. It's not usually necessary to call this procedure\n" | |
531 | "since it's done automatically by other procedures that depend on the\n" | |
532 | "timezone.") | |
1bbd0b84 | 533 | #define FUNC_NAME s_scm_tzset |
0f2d19dd | 534 | { |
19468eff GH |
535 | tzset(); |
536 | return SCM_UNSPECIFIED; | |
0f2d19dd | 537 | } |
1bbd0b84 | 538 | #undef FUNC_NAME |
38c1d3c4 | 539 | #endif /* HAVE_TZSET */ |
0f2d19dd | 540 | |
a1ec6916 | 541 | SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0, |
1bbd0b84 | 542 | (SCM format, SCM stime), |
a3c8b9fc MD |
543 | "Formats a time specification @var{time} using @var{template}. @var{time}\n" |
544 | "is an object with time components in the form returned by @code{localtime}\n" | |
545 | "or @code{gmtime}. @var{template} is a string which can include formatting\n" | |
546 | "specifications introduced by a @code{%} character. The formatting of\n" | |
547 | "month and day names is dependent on the current locale. The value returned\n" | |
548 | "is the formatted string.\n" | |
549 | "@xref{Formatting Date and Time, , , libc, The GNU C Library Reference Manual}.)") | |
1bbd0b84 | 550 | #define FUNC_NAME s_scm_strftime |
b9525b92 GH |
551 | { |
552 | struct tm t; | |
553 | ||
554 | char *tbuf; | |
555 | int size = 50; | |
a15e6dcc | 556 | char *fmt, *myfmt; |
b9525b92 | 557 | int len; |
ef9ff3fd | 558 | SCM result; |
b9525b92 | 559 | |
a6d9e5ab | 560 | SCM_VALIDATE_STRING (1, format); |
1bbd0b84 | 561 | bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME); |
b9525b92 | 562 | |
a6d9e5ab DH |
563 | fmt = SCM_STRING_CHARS (format); |
564 | len = SCM_STRING_LENGTH (format); | |
b9525b92 | 565 | |
a15e6dcc MV |
566 | /* Ugly hack: strftime can return 0 if its buffer is too small, |
567 | but some valid time strings (e.g. "%p") can sometimes produce | |
568 | a zero-byte output string! Workaround is to prepend a junk | |
569 | character to the format string, so that valid returns are always | |
570 | nonzero. */ | |
4c9419ac | 571 | myfmt = scm_malloc (len+2); |
a15e6dcc MV |
572 | *myfmt = 'x'; |
573 | strncpy(myfmt+1, fmt, len); | |
574 | myfmt[len+1] = 0; | |
575 | ||
4c9419ac | 576 | tbuf = scm_malloc (size); |
b8a1b29b GH |
577 | { |
578 | #if !defined (HAVE_TM_ZONE) | |
579 | /* it seems the only way to tell non-GNU versions of strftime what | |
580 | zone to use (for the %Z format) is to set TZ in the | |
581 | environment. interrupts and thread switching must be deferred | |
582 | until TZ is restored. */ | |
583 | char **oldenv = NULL; | |
584 | SCM *velts = SCM_VELTS (stime); | |
e652b54f | 585 | int have_zone = 0; |
b8a1b29b | 586 | |
36284627 | 587 | if (!SCM_FALSEP (velts[10]) && *SCM_STRING_CHARS (velts[10]) != 0) |
b8a1b29b GH |
588 | { |
589 | /* it's not required that the TZ setting be correct, just that | |
e652b54f GH |
590 | it has the right name. so try something like TZ=EST0. |
591 | using only TZ=EST would be simpler but it doesn't work on | |
592 | some OSs, e.g., Solaris. */ | |
593 | SCM zone = | |
594 | scm_string_append (scm_cons (velts[10], | |
595 | scm_cons (scm_makfrom0str ("0"), | |
596 | SCM_EOL))); | |
1c299a6b | 597 | |
e652b54f | 598 | have_zone = 1; |
b8a1b29b | 599 | SCM_DEFER_INTS; |
e652b54f | 600 | oldenv = setzone (zone, SCM_ARG2, FUNC_NAME); |
b8a1b29b GH |
601 | } |
602 | #endif | |
603 | ||
38c1d3c4 | 604 | #ifdef LOCALTIME_CACHE |
b8a1b29b GH |
605 | tzset (); |
606 | #endif | |
607 | ||
a15e6dcc MV |
608 | /* POSIX says strftime returns 0 on buffer overrun, but old |
609 | systems (i.e. libc 4 on GNU/Linux) might return `size' in that | |
610 | case. */ | |
611 | while ((len = strftime (tbuf, size, myfmt, &t)) == 0 || len == size) | |
b8a1b29b | 612 | { |
4c9419ac | 613 | free (tbuf); |
b8a1b29b | 614 | size *= 2; |
4c9419ac | 615 | tbuf = scm_malloc (size); |
b8a1b29b GH |
616 | } |
617 | ||
618 | #if !defined (HAVE_TM_ZONE) | |
e652b54f | 619 | if (have_zone) |
b8a1b29b GH |
620 | { |
621 | restorezone (velts[10], oldenv, FUNC_NAME); | |
622 | SCM_ALLOW_INTS; | |
623 | } | |
38c1d3c4 | 624 | #endif |
b9525b92 | 625 | } |
b8a1b29b | 626 | |
36284627 | 627 | result = scm_mem2string (tbuf + 1, len - 1); |
4c9419ac MV |
628 | free (tbuf); |
629 | free (myfmt); | |
ef9ff3fd | 630 | return result; |
b9525b92 | 631 | } |
1bbd0b84 | 632 | #undef FUNC_NAME |
b9525b92 | 633 | |
f25f761d | 634 | #ifdef HAVE_STRPTIME |
a1ec6916 | 635 | SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0, |
1bbd0b84 | 636 | (SCM format, SCM string), |
a8eac221 MG |
637 | "Performs the reverse action to @code{strftime}, parsing\n" |
638 | "@var{string} according to the specification supplied in\n" | |
639 | "@var{template}. The interpretation of month and day names is\n" | |
640 | "dependent on the current locale. The value returned is a pair.\n" | |
641 | "The car has an object with time components\n" | |
a3c8b9fc MD |
642 | "in the form returned by @code{localtime} or @code{gmtime},\n" |
643 | "but the time zone components\n" | |
644 | "are not usefully set.\n" | |
a8eac221 MG |
645 | "The cdr reports the number of characters from @var{string}\n" |
646 | "which were used for the conversion.") | |
1bbd0b84 | 647 | #define FUNC_NAME s_scm_strptime |
b9525b92 | 648 | { |
b9525b92 GH |
649 | struct tm t; |
650 | char *fmt, *str, *rest; | |
651 | ||
a6d9e5ab DH |
652 | SCM_VALIDATE_STRING (1, format); |
653 | SCM_VALIDATE_STRING (2, string); | |
b9525b92 | 654 | |
a6d9e5ab DH |
655 | fmt = SCM_STRING_CHARS (format); |
656 | str = SCM_STRING_CHARS (string); | |
b9525b92 GH |
657 | |
658 | /* initialize the struct tm */ | |
659 | #define tm_init(field) t.field = 0 | |
660 | tm_init (tm_sec); | |
661 | tm_init (tm_min); | |
662 | tm_init (tm_hour); | |
663 | tm_init (tm_mday); | |
664 | tm_init (tm_mon); | |
665 | tm_init (tm_year); | |
666 | tm_init (tm_wday); | |
667 | tm_init (tm_yday); | |
668 | #undef tm_init | |
669 | ||
670 | t.tm_isdst = -1; | |
671 | SCM_DEFER_INTS; | |
672 | if ((rest = strptime (str, fmt, &t)) == NULL) | |
1bbd0b84 | 673 | SCM_SYSERROR; |
b9525b92 GH |
674 | |
675 | SCM_ALLOW_INTS; | |
676 | return scm_cons (filltime (&t, 0, NULL), SCM_MAKINUM (rest - str)); | |
b9525b92 | 677 | } |
1bbd0b84 | 678 | #undef FUNC_NAME |
f25f761d | 679 | #endif /* HAVE_STRPTIME */ |
b9525b92 | 680 | |
0f2d19dd JB |
681 | void |
682 | scm_init_stime() | |
0f2d19dd | 683 | { |
86d31dfe | 684 | scm_c_define ("internal-time-units-per-second", |
756414cf | 685 | scm_long2num((long) SCM_TIME_UNITS_PER_SECOND)); |
0f2d19dd JB |
686 | |
687 | #ifdef HAVE_FTIME | |
688 | if (!scm_your_base.time) ftime(&scm_your_base); | |
689 | #else | |
690 | if (!scm_your_base) time(&scm_your_base); | |
691 | #endif | |
692 | ||
693 | if (!scm_my_base) scm_my_base = mytime(); | |
694 | ||
876c87ce | 695 | scm_add_feature ("current-time"); |
a0599745 | 696 | #include "libguile/stime.x" |
0f2d19dd JB |
697 | } |
698 | ||
89e00824 ML |
699 | |
700 | /* | |
701 | Local Variables: | |
702 | c-file-style: "gnu" | |
703 | End: | |
704 | */ |