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