--- /dev/null
+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+
+/* _POSIX_C_SOURCE is not defined always, because it causes problems on some
+ systems, notably
+
+ - FreeBSD loses all BSD and XOPEN defines.
+ - glibc loses some things like CLK_TCK.
+ - On MINGW it conflicts with the pthread headers.
+
+ But on HP-UX _POSIX_C_SOURCE is needed, as noted, for gmtime_r.
+
+ Perhaps a configure test could figure out what _POSIX_C_SOURCE gives and
+ what it takes away, and decide from that whether to use it, instead of
+ hard coding __hpux. */
+
+#ifndef _REENTRANT
+# define _REENTRANT /* ask solaris for gmtime_r prototype */
+#endif
+#ifdef __hpux
+#define _POSIX_C_SOURCE 199506L /* for gmtime_r prototype */
+#endif
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "libguile/_scm.h"
+#include "libguile/async.h"
+#include "libguile/feature.h"
+#include "libguile/strings.h"
+#include "libguile/vectors.h"
+#include "libguile/dynwind.h"
+
+#include "libguile/validate.h"
+#include "libguile/stime.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+\f
+# ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+# endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifdef HAVE_SYS_TIMES_H
+# include <sys/times.h>
+#endif
+
+#ifdef HAVE_SYS_TIMEB_H
+# include <sys/timeb.h>
+#endif
+
+#if HAVE_CRT_EXTERNS_H
+#include <crt_externs.h> /* for Darwin _NSGetEnviron */
+#endif
+
+#if defined (__MINGW32__)
+# define tzname _tzname
+#else
+#ifndef tzname /* For SGI. */
+extern char *tzname[]; /* RS6000 and others reject char **tzname. */
+#endif
+#endif
+
+#if ! HAVE_DECL_STRPTIME
+extern char *strptime ();
+#endif
+
+#ifdef __STDC__
+# define timet time_t
+#else
+# define timet long
+#endif
+
+extern char ** environ;
+
+/* On Apple Darwin in a shared library there's no "environ" to access
+ directly, instead the address of that variable must be obtained with
+ _NSGetEnviron(). */
+#if HAVE__NSGETENVIRON && defined (PIC)
+#define environ (*_NSGetEnviron())
+#endif
+
+
+#ifdef HAVE_TIMES
+static
+timet mytime()
+{
+ struct tms time_buffer;
+ times(&time_buffer);
+ return time_buffer.tms_utime + time_buffer.tms_stime;
+}
+#else
+# ifdef LACK_CLOCK
+# define mytime() ((time((timet*)0) - scm_your_base) * SCM_TIME_UNITS_PER_SECOND)
+# else
+# define mytime clock
+# endif
+#endif
+
+#ifdef HAVE_FTIME
+struct timeb scm_your_base = {0};
+#else
+timet scm_your_base = 0;
+#endif
+
+SCM_DEFINE (scm_get_internal_real_time, "get-internal-real-time", 0, 0, 0,
+ (),
+ "Return the number of time units since the interpreter was\n"
+ "started.")
+#define FUNC_NAME s_scm_get_internal_real_time
+{
+#ifdef HAVE_FTIME
+ struct timeb time_buffer;
+
+ SCM tmp;
+ ftime (&time_buffer);
+ time_buffer.time -= scm_your_base.time;
+ tmp = scm_from_long (time_buffer.millitm - scm_your_base.millitm);
+ tmp = scm_sum (tmp,
+ scm_product (scm_from_int (1000),
+ scm_from_int (time_buffer.time)));
+ return scm_quotient (scm_product (tmp,
+ scm_from_int (SCM_TIME_UNITS_PER_SECOND)),
+ scm_from_int (1000));
+#else
+ return scm_from_long ((time((timet*)0) - scm_your_base)
+ * (int)SCM_TIME_UNITS_PER_SECOND);
+#endif /* HAVE_FTIME */
+}
+#undef FUNC_NAME
+
+
+#ifdef HAVE_TIMES
+SCM_DEFINE (scm_times, "times", 0, 0, 0,
+ (void),
+ "Return an object with information about real and processor\n"
+ "time. The following procedures accept such an object as an\n"
+ "argument and return a selected component:\n"
+ "\n"
+ "@table @code\n"
+ "@item tms:clock\n"
+ "The current real time, expressed as time units relative to an\n"
+ "arbitrary base.\n"
+ "@item tms:utime\n"
+ "The CPU time units used by the calling process.\n"
+ "@item tms:stime\n"
+ "The CPU time units used by the system on behalf of the calling\n"
+ "process.\n"
+ "@item tms:cutime\n"
+ "The CPU time units used by terminated child processes of the\n"
+ "calling process, whose status has been collected (e.g., using\n"
+ "@code{waitpid}).\n"
+ "@item tms:cstime\n"
+ "Similarly, the CPU times units used by the system on behalf of\n"
+ "terminated child processes.\n"
+ "@end table")
+#define FUNC_NAME s_scm_times
+{
+ struct tms t;
+ clock_t rv;
+
+ SCM result = scm_c_make_vector (5, SCM_UNDEFINED);
+ rv = times (&t);
+ if (rv == -1)
+ SCM_SYSERROR;
+ SCM_SIMPLE_VECTOR_SET (result, 0, scm_from_long (rv));
+ SCM_SIMPLE_VECTOR_SET (result, 1, scm_from_long (t.tms_utime));
+ SCM_SIMPLE_VECTOR_SET (result, 2, scm_from_long (t.tms_stime));
+ SCM_SIMPLE_VECTOR_SET (result ,3, scm_from_long (t.tms_cutime));
+ SCM_SIMPLE_VECTOR_SET (result, 4, scm_from_long (t.tms_cstime));
+ return result;
+}
+#undef FUNC_NAME
+#endif /* HAVE_TIMES */
+
+static long scm_my_base = 0;
+
+long
+scm_c_get_internal_run_time ()
+{
+ return mytime () - scm_my_base;
+}
+
+SCM_DEFINE (scm_get_internal_run_time, "get-internal-run-time", 0, 0, 0,
+ (void),
+ "Return the number of time units of processor time used by the\n"
+ "interpreter. Both @emph{system} and @emph{user} time are\n"
+ "included but subprocesses are not.")
+#define FUNC_NAME s_scm_get_internal_run_time
+{
+ return scm_from_long (scm_c_get_internal_run_time ());
+}
+#undef FUNC_NAME
+
+/* For reference, note that current-time and gettimeofday both should be
+ protected against setzone/restorezone changes in another thread, since on
+ DOS the system time is normally kept as local time, which means TZ
+ affects the return from current-time and gettimeofday. Not sure if DJGPP
+ etc actually has concurrent multi-threading, but it seems prudent not to
+ make assumptions about this. */
+
+SCM_DEFINE (scm_current_time, "current-time", 0, 0, 0,
+ (void),
+ "Return the number of seconds since 1970-01-01 00:00:00 UTC,\n"
+ "excluding leap seconds.")
+#define FUNC_NAME s_scm_current_time
+{
+ timet timv;
+
+ SCM_CRITICAL_SECTION_START;
+ timv = time (NULL);
+ SCM_CRITICAL_SECTION_END;
+ if (timv == -1)
+ SCM_MISC_ERROR ("current time not available", SCM_EOL);
+ return scm_from_long (timv);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_gettimeofday, "gettimeofday", 0, 0, 0,
+ (void),
+ "Return a pair containing the number of seconds and microseconds\n"
+ "since 1970-01-01 00:00:00 UTC, excluding leap seconds. Note:\n"
+ "whether true microsecond resolution is available depends on the\n"
+ "operating system.")
+#define FUNC_NAME s_scm_gettimeofday
+{
+#ifdef HAVE_GETTIMEOFDAY
+ struct timeval time;
+ int ret, err;
+
+ SCM_CRITICAL_SECTION_START;
+ ret = gettimeofday (&time, NULL);
+ err = errno;
+ SCM_CRITICAL_SECTION_END;
+ if (ret == -1)
+ {
+ errno = err;
+ SCM_SYSERROR;
+ }
+ return scm_cons (scm_from_long (time.tv_sec),
+ scm_from_long (time.tv_usec));
+#else
+# ifdef HAVE_FTIME
+ struct timeb time;
+
+ ftime(&time);
+ return scm_cons (scm_from_long (time.time),
+ scm_from_int (time.millitm * 1000));
+# else
+ timet timv;
+ int err;
+
+ SCM_CRITICAL_SECTION_START;
+ timv = time (NULL);
+ err = errno;
+ SCM_CRITICAL_SECTION_END;
+ if (timv == -1)
+ {
+ errno = err;
+ SCM_SYSERROR;
+ }
+ return scm_cons (scm_from_long (timv), scm_from_int (0));
+# endif
+#endif
+}
+#undef FUNC_NAME
+
+static SCM
+filltime (struct tm *bd_time, int zoff, const char *zname)
+{
+ SCM result = scm_c_make_vector (11, SCM_UNDEFINED);
+
+ SCM_SIMPLE_VECTOR_SET (result,0, scm_from_int (bd_time->tm_sec));
+ SCM_SIMPLE_VECTOR_SET (result,1, scm_from_int (bd_time->tm_min));
+ SCM_SIMPLE_VECTOR_SET (result,2, scm_from_int (bd_time->tm_hour));
+ SCM_SIMPLE_VECTOR_SET (result,3, scm_from_int (bd_time->tm_mday));
+ SCM_SIMPLE_VECTOR_SET (result,4, scm_from_int (bd_time->tm_mon));
+ SCM_SIMPLE_VECTOR_SET (result,5, scm_from_int (bd_time->tm_year));
+ SCM_SIMPLE_VECTOR_SET (result,6, scm_from_int (bd_time->tm_wday));
+ SCM_SIMPLE_VECTOR_SET (result,7, scm_from_int (bd_time->tm_yday));
+ SCM_SIMPLE_VECTOR_SET (result,8, scm_from_int (bd_time->tm_isdst));
+ SCM_SIMPLE_VECTOR_SET (result,9, scm_from_int (zoff));
+ SCM_SIMPLE_VECTOR_SET (result,10, (zname
+ ? scm_from_locale_string (zname)
+ : SCM_BOOL_F));
+ return result;
+}
+
+static char tzvar[3] = "TZ";
+
+/* if zone is set, create a temporary environment with only a TZ
+ string. other threads or interrupt handlers shouldn't be allowed
+ to run until the corresponding restorezone is called. hence the use
+ of a static variable for tmpenv is no big deal. */
+static char **
+setzone (SCM zone, int pos, const char *subr)
+{
+ char **oldenv = 0;
+
+ if (!SCM_UNBNDP (zone))
+ {
+ static char *tmpenv[2];
+ char *buf;
+ size_t zone_len;
+
+ zone_len = scm_to_locale_stringbuf (zone, NULL, 0);
+ buf = scm_malloc (zone_len + sizeof (tzvar) + 1);
+ strcpy (buf, tzvar);
+ buf[sizeof(tzvar)-1] = '=';
+ scm_to_locale_stringbuf (zone, buf+sizeof(tzvar), zone_len);
+ buf[sizeof(tzvar)+zone_len] = '\0';
+ oldenv = environ;
+ tmpenv[0] = buf;
+ tmpenv[1] = 0;
+ environ = tmpenv;
+ }
+ return oldenv;
+}
+
+static void
+restorezone (SCM zone, char **oldenv, const char *subr SCM_UNUSED)
+{
+ if (!SCM_UNBNDP (zone))
+ {
+ free (environ[0]);
+ environ = oldenv;
+#ifdef HAVE_TZSET
+ /* for the possible benefit of user code linked with libguile. */
+ tzset();
+#endif
+ }
+}
+
+SCM_DEFINE (scm_localtime, "localtime", 1, 1, 0,
+ (SCM time, SCM zone),
+ "Return an object representing the broken down components of\n"
+ "@var{time}, an integer like the one returned by\n"
+ "@code{current-time}. The time zone for the calculation is\n"
+ "optionally specified by @var{zone} (a string), otherwise the\n"
+ "@code{TZ} environment variable or the system default is used.")
+#define FUNC_NAME s_scm_localtime
+{
+ timet itime;
+ struct tm *ltptr, lt, *utc;
+ SCM result;
+ int zoff;
+ char *zname = 0;
+ char **oldenv;
+ int err;
+
+ itime = SCM_NUM2LONG (1, time);
+
+ /* deferring interupts is essential since a) setzone may install a temporary
+ environment b) localtime uses a static buffer. */
+ SCM_CRITICAL_SECTION_START;
+ oldenv = setzone (zone, SCM_ARG2, FUNC_NAME);
+#ifdef LOCALTIME_CACHE
+ tzset ();
+#endif
+ /* POSIX says localtime sets errno, but C99 doesn't say that.
+ Give a sensible default value in case localtime doesn't set it. */
+ errno = EINVAL;
+ ltptr = localtime (&itime);
+ err = errno;
+ if (ltptr)
+ {
+ const char *ptr;
+
+ /* copy zone name before calling gmtime or restoring zone. */
+#if defined (HAVE_TM_ZONE)
+ ptr = ltptr->tm_zone;
+#elif defined (HAVE_TZNAME)
+ ptr = tzname[ (ltptr->tm_isdst == 1) ? 1 : 0 ];
+#else
+ ptr = "";
+#endif
+ zname = scm_malloc (strlen (ptr) + 1);
+ strcpy (zname, ptr);
+ }
+ /* the struct is copied in case localtime and gmtime share a buffer. */
+ if (ltptr)
+ lt = *ltptr;
+ /* POSIX says gmtime sets errno, but C99 doesn't say that.
+ Give a sensible default value in case gmtime doesn't set it. */
+ errno = EINVAL;
+ utc = gmtime (&itime);
+ if (utc == NULL)
+ err = errno;
+ restorezone (zone, oldenv, FUNC_NAME);
+ /* delayed until zone has been restored. */
+ errno = err;
+ if (utc == NULL || ltptr == NULL)
+ SCM_SYSERROR;
+
+ /* calculate timezone offset in seconds west of UTC. */
+ zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60
+ + utc->tm_sec - lt.tm_sec;
+ if (utc->tm_year < lt.tm_year)
+ zoff -= 24 * 60 * 60;
+ else if (utc->tm_year > lt.tm_year)
+ zoff += 24 * 60 * 60;
+ else if (utc->tm_yday < lt.tm_yday)
+ zoff -= 24 * 60 * 60;
+ else if (utc->tm_yday > lt.tm_yday)
+ zoff += 24 * 60 * 60;
+
+ result = filltime (<, zoff, zname);
+ SCM_CRITICAL_SECTION_END;
+ if (zname)
+ free (zname);
+ return result;
+}
+#undef FUNC_NAME
+
+/* tm_zone is normally a pointer, not an array within struct tm, so we might
+ have to worry about the lifespan of what it points to. The posix specs
+ don't seem to say anything about this, let's assume here that tm_zone
+ will be a constant and therefore no protection or anything is needed
+ until we copy it in filltime(). */
+
+SCM_DEFINE (scm_gmtime, "gmtime", 1, 0, 0,
+ (SCM time),
+ "Return an object representing the broken down components of\n"
+ "@var{time}, an integer like the one returned by\n"
+ "@code{current-time}. The values are calculated for UTC.")
+#define FUNC_NAME s_scm_gmtime
+{
+ timet itime;
+ struct tm bd_buf, *bd_time;
+ const char *zname;
+
+ itime = SCM_NUM2LONG (1, time);
+
+ /* POSIX says gmtime sets errno, but C99 doesn't say that.
+ Give a sensible default value in case gmtime doesn't set it. */
+ errno = EINVAL;
+
+#if HAVE_GMTIME_R
+ bd_time = gmtime_r (&itime, &bd_buf);
+#else
+ SCM_CRITICAL_SECTION_START;
+ bd_time = gmtime (&itime);
+ if (bd_time != NULL)
+ bd_buf = *bd_time;
+ SCM_CRITICAL_SECTION_END;
+#endif
+ if (bd_time == NULL)
+ SCM_SYSERROR;
+
+#if HAVE_STRUCT_TM_TM_ZONE
+ zname = bd_buf.tm_zone;
+#else
+ zname = "GMT";
+#endif
+ return filltime (&bd_buf, 0, zname);
+}
+#undef FUNC_NAME
+
+/* copy time components from a Scheme object to a struct tm. */
+static void
+bdtime2c (SCM sbd_time, struct tm *lt, int pos, const char *subr)
+{
+ SCM_ASSERT (scm_is_simple_vector (sbd_time)
+ && SCM_SIMPLE_VECTOR_LENGTH (sbd_time) == 11,
+ sbd_time, pos, subr);
+
+ lt->tm_sec = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 0));
+ lt->tm_min = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 1));
+ lt->tm_hour = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 2));
+ lt->tm_mday = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 3));
+ lt->tm_mon = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 4));
+ lt->tm_year = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 5));
+ lt->tm_wday = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 6));
+ lt->tm_yday = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 7));
+ lt->tm_isdst = scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 8));
+#if HAVE_STRUCT_TM_TM_GMTOFF
+ lt->tm_gmtoff = - scm_to_int (SCM_SIMPLE_VECTOR_REF (sbd_time, 9));
+#endif
+#ifdef HAVE_TM_ZONE
+ if (scm_is_false (SCM_SIMPLE_VECTOR_REF (sbd_time, 10)))
+ lt->tm_zone = NULL;
+ else
+ lt->tm_zone = scm_to_locale_string (SCM_SIMPLE_VECTOR_REF (sbd_time, 10));
+#endif
+}
+
+SCM_DEFINE (scm_mktime, "mktime", 1, 1, 0,
+ (SCM sbd_time, SCM zone),
+ "@var{bd-time} is an object representing broken down time and @code{zone}\n"
+ "is an optional time zone specifier (otherwise the TZ environment variable\n"
+ "or the system default is used).\n\n"
+ "Returns a pair: the car is a corresponding\n"
+ "integer time value like that returned\n"
+ "by @code{current-time}; the cdr is a broken down time object, similar to\n"
+ "as @var{bd-time} but with normalized values.")
+#define FUNC_NAME s_scm_mktime
+{
+ timet itime;
+ struct tm lt, *utc;
+ SCM result;
+ int zoff;
+ char *zname = 0;
+ char **oldenv;
+ int err;
+
+ scm_dynwind_begin (0);
+
+ bdtime2c (sbd_time, <, SCM_ARG1, FUNC_NAME);
+#if HAVE_STRUCT_TM_TM_ZONE
+ scm_dynwind_free ((char *)lt.tm_zone);
+#endif
+
+ scm_dynwind_critical_section (SCM_BOOL_F);
+
+ oldenv = setzone (zone, SCM_ARG2, FUNC_NAME);
+#ifdef LOCALTIME_CACHE
+ tzset ();
+#endif
+ itime = mktime (<);
+ /* POSIX doesn't say mktime sets errno, and on glibc 2.3.2 for instance it
+ doesn't. Force a sensible value for our error message. */
+ err = EINVAL;
+
+ if (itime != -1)
+ {
+ const char *ptr;
+
+ /* copy zone name before calling gmtime or restoring the zone. */
+#if defined (HAVE_TM_ZONE)
+ ptr = lt.tm_zone;
+#elif defined (HAVE_TZNAME)
+ ptr = tzname[ (lt.tm_isdst == 1) ? 1 : 0 ];
+#else
+ ptr = "";
+#endif
+ zname = scm_malloc (strlen (ptr) + 1);
+ strcpy (zname, ptr);
+ }
+
+ /* get timezone offset in seconds west of UTC. */
+ /* POSIX says gmtime sets errno, but C99 doesn't say that.
+ Give a sensible default value in case gmtime doesn't set it. */
+ errno = EINVAL;
+ utc = gmtime (&itime);
+ if (utc == NULL)
+ err = errno;
+
+ restorezone (zone, oldenv, FUNC_NAME);
+ /* delayed until zone has been restored. */
+ errno = err;
+ if (utc == NULL || itime == -1)
+ SCM_SYSERROR;
+
+ zoff = (utc->tm_hour - lt.tm_hour) * 3600 + (utc->tm_min - lt.tm_min) * 60
+ + utc->tm_sec - lt.tm_sec;
+ if (utc->tm_year < lt.tm_year)
+ zoff -= 24 * 60 * 60;
+ else if (utc->tm_year > lt.tm_year)
+ zoff += 24 * 60 * 60;
+ else if (utc->tm_yday < lt.tm_yday)
+ zoff -= 24 * 60 * 60;
+ else if (utc->tm_yday > lt.tm_yday)
+ zoff += 24 * 60 * 60;
+
+ result = scm_cons (scm_from_long (itime),
+ filltime (<, zoff, zname));
+ if (zname)
+ free (zname);
+
+ scm_dynwind_end ();
+ return result;
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_TZSET
+SCM_DEFINE (scm_tzset, "tzset", 0, 0, 0,
+ (void),
+ "Initialize the timezone from the TZ environment variable\n"
+ "or the system default. It's not usually necessary to call this procedure\n"
+ "since it's done automatically by other procedures that depend on the\n"
+ "timezone.")
+#define FUNC_NAME s_scm_tzset
+{
+ tzset();
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif /* HAVE_TZSET */
+
+SCM_DEFINE (scm_strftime, "strftime", 2, 0, 0,
+ (SCM format, SCM stime),
+ "Return a string which is broken-down time structure @var{stime}\n"
+ "formatted according to the given @var{format} string.\n"
+ "\n"
+ "@var{format} contains field specifications introduced by a\n"
+ "@samp{%} character. See @ref{Formatting Calendar Time,,, libc,\n"
+ "The GNU C Library Reference Manual}, or @samp{man 3 strftime},\n"
+ "for the available formatting.\n"
+ "\n"
+ "@lisp\n"
+ "(strftime \"%c\" (localtime (current-time)))\n"
+ "@result{} \"Mon Mar 11 20:17:43 2002\"\n"
+ "@end lisp\n"
+ "\n"
+ "If @code{setlocale} has been called (@pxref{Locales}), month\n"
+ "and day names are from the current locale and in the locale\n"
+ "character set.")
+#define FUNC_NAME s_scm_strftime
+{
+ struct tm t;
+
+ char *tbuf;
+ int size = 50;
+ const char *fmt;
+ char *myfmt;
+ int len;
+ SCM result;
+
+ SCM_VALIDATE_STRING (1, format);
+ bdtime2c (stime, &t, SCM_ARG2, FUNC_NAME);
+
+ fmt = scm_i_string_chars (format);
+ len = scm_i_string_length (format);
+
+ /* Ugly hack: strftime can return 0 if its buffer is too small,
+ but some valid time strings (e.g. "%p") can sometimes produce
+ a zero-byte output string! Workaround is to prepend a junk
+ character to the format string, so that valid returns are always
+ nonzero. */
+ myfmt = scm_malloc (len+2);
+ *myfmt = 'x';
+ strncpy(myfmt+1, fmt, len);
+ myfmt[len+1] = 0;
+
+ tbuf = scm_malloc (size);
+ {
+#if !defined (HAVE_TM_ZONE)
+ /* it seems the only way to tell non-GNU versions of strftime what
+ zone to use (for the %Z format) is to set TZ in the
+ environment. interrupts and thread switching must be deferred
+ until TZ is restored. */
+ char **oldenv = NULL;
+ SCM zone_spec = SCM_SIMPLE_VECTOR_REF (stime, 10);
+ int have_zone = 0;
+
+ if (scm_is_true (zone_spec) && scm_c_string_length (zone_spec) > 0)
+ {
+ /* it's not required that the TZ setting be correct, just that
+ it has the right name. so try something like TZ=EST0.
+ using only TZ=EST would be simpler but it doesn't work on
+ some OSs, e.g., Solaris. */
+ SCM zone =
+ scm_string_append (scm_list_2 (zone_spec,
+ scm_from_locale_string ("0")));
+
+ have_zone = 1;
+ SCM_CRITICAL_SECTION_START;
+ oldenv = setzone (zone, SCM_ARG2, FUNC_NAME);
+ }
+#endif
+
+#ifdef LOCALTIME_CACHE
+ tzset ();
+#endif
+
+ /* POSIX says strftime returns 0 on buffer overrun, but old
+ systems (i.e. libc 4 on GNU/Linux) might return `size' in that
+ case. */
+ while ((len = strftime (tbuf, size, myfmt, &t)) == 0 || len == size)
+ {
+ free (tbuf);
+ size *= 2;
+ tbuf = scm_malloc (size);
+ }
+
+#if !defined (HAVE_TM_ZONE)
+ if (have_zone)
+ {
+ restorezone (zone_spec, oldenv, FUNC_NAME);
+ SCM_CRITICAL_SECTION_END;
+ }
+#endif
+ }
+
+ result = scm_from_locale_stringn (tbuf + 1, len - 1);
+ free (tbuf);
+ free (myfmt);
+#if HAVE_STRUCT_TM_TM_ZONE
+ free ((char *) t.tm_zone);
+#endif
+ return result;
+}
+#undef FUNC_NAME
+
+#ifdef HAVE_STRPTIME
+SCM_DEFINE (scm_strptime, "strptime", 2, 0, 0,
+ (SCM format, SCM string),
+ "Performs the reverse action to @code{strftime}, parsing\n"
+ "@var{string} according to the specification supplied in\n"
+ "@var{template}. The interpretation of month and day names is\n"
+ "dependent on the current locale. The value returned is a pair.\n"
+ "The car has an object with time components\n"
+ "in the form returned by @code{localtime} or @code{gmtime},\n"
+ "but the time zone components\n"
+ "are not usefully set.\n"
+ "The cdr reports the number of characters from @var{string}\n"
+ "which were used for the conversion.")
+#define FUNC_NAME s_scm_strptime
+{
+ struct tm t;
+ const char *fmt, *str, *rest;
+ long zoff;
+
+ SCM_VALIDATE_STRING (1, format);
+ SCM_VALIDATE_STRING (2, string);
+
+ fmt = scm_i_string_chars (format);
+ str = scm_i_string_chars (string);
+
+ /* initialize the struct tm */
+#define tm_init(field) t.field = 0
+ tm_init (tm_sec);
+ tm_init (tm_min);
+ tm_init (tm_hour);
+ tm_init (tm_mday);
+ tm_init (tm_mon);
+ tm_init (tm_year);
+ tm_init (tm_wday);
+ tm_init (tm_yday);
+#if HAVE_STRUCT_TM_TM_GMTOFF
+ tm_init (tm_gmtoff);
+#endif
+#undef tm_init
+
+ /* GNU glibc strptime() "%s" is affected by the current timezone, since it
+ reads a UTC time_t value and converts with localtime_r() to set the tm
+ fields, hence the use of SCM_CRITICAL_SECTION_START. */
+ t.tm_isdst = -1;
+ SCM_CRITICAL_SECTION_START;
+ rest = strptime (str, fmt, &t);
+ SCM_CRITICAL_SECTION_END;
+ if (rest == NULL)
+ {
+ /* POSIX doesn't say strptime sets errno, and on glibc 2.3.2 for
+ instance it doesn't. Force a sensible value for our error
+ message. */
+ errno = EINVAL;
+ SCM_SYSERROR;
+ }
+
+ /* tm_gmtoff is set by GNU glibc strptime "%s", so capture it when
+ available */
+#if HAVE_STRUCT_TM_TM_GMTOFF
+ zoff = - t.tm_gmtoff; /* seconds west, not east */
+#else
+ zoff = 0;
+#endif
+
+ return scm_cons (filltime (&t, zoff, NULL),
+ scm_from_signed_integer (rest - str));
+}
+#undef FUNC_NAME
+#endif /* HAVE_STRPTIME */
+
+void
+scm_init_stime()
+{
+ scm_c_define ("internal-time-units-per-second",
+ scm_from_long (SCM_TIME_UNITS_PER_SECOND));
+
+#ifdef HAVE_FTIME
+ if (!scm_your_base.time) ftime(&scm_your_base);
+#else
+ if (!scm_your_base) time(&scm_your_base);
+#endif
+
+ if (!scm_my_base) scm_my_base = mytime();
+
+ scm_add_feature ("current-time");
+#include "libguile/stime.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff