Move timestamp-related stuff to timefns.c

This does not change behavior; it’s just long-overdue
refactoring (Bug#32902).
* src/emacs.c (main): Call init_timefns, syms_of_timefns.
* src/timefns.c: New file, containing timestamp-related stuff
from editfns.c and sysdep.c.
* src/Makefile.in (base_obj): Add timefns.o.
* src/editfns.c: Simplify by moving a big chunk to timefns.c.
Do not include systime.h, sys/resource.h, sys/param.h,
strftime.h, coding.h.
(HAVE_TZALLOC_BUG, TM_YEAR_BASE, HAVE_TM_GMTOFF, tzeqlen)
(local_tz, utc_tz, emacs_localtime_rz, emacs_mktime_z)
(invalid_time_zone_specification, xtzfree, tzlookup)
(TIME_T_MIN, TIME_T_MAX, time_overflow, invalid_time)
(check_time_validity, hi_time, lo_time, Fcurrent_time)
(time_add, time_subtract, time_arith, Ftime_add)
(Ftime_subtract, Ftime_less_p, Fget_internal_run_time)
(make_lisp_time, disassemble_lisp_time, decode_float_time)
(lisp_to_timespec, lisp_time_struct, lisp_time_argument)
(lisp_seconds_argument, Ffloat_time, emacs_nmemftime)
(Fformat_time_string, format_time_string, Fdecode_time)
(check_tm_member, Fencode_time, Fcurrent_time_string)
(tm_gmtoff, Fcurrent_time_zone, Fset_time_zone_rule)
(emacs_getenv_TZ, emacs_setenv_TZ): Move to timefns.c.
* src/emacs.c (main): Adjust to initialization changes.
* src/sysdep.c: Include <sys/resource.h> if it's present.
Regularize includes a bit.
(Fget_internal_run_time): Move here from editfns.c.
(init_timefns, syms_of_timefns): New functions.
* src/w32.h (w32_get_internal_run_time): Move decl here
so that it need not be cloned.
* test/src/editfns-tests.el:
* test/src/editfns-tests.el (format-time-string-with-zone)
(format-time-string-with-outlandish-zone)
(editfns-tests--have-leap-seconds)
(format-time-string-with-bignum-on-32-bit):
Move to ...
* test/src/timefns-tests.el: ... this new file.

1 files changed, 54 insertions, 33 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index 722d8138ded..06956863611 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -91,13 +91,19 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include <sys/file.h>
 #include <fcntl.h>
 
+#include "syssignal.h"
+#include "systime.h"
 #include "systty.h"
 #include "syswait.h"
 
+#ifdef HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
 #ifdef HAVE_SYS_UTSNAME_H
-#include <sys/utsname.h>
-#include <memory.h>
-#endif /* HAVE_SYS_UTSNAME_H */
+# include <sys/utsname.h>
+# include <memory.h>
+#endif
 
 #include "keyboard.h"
 #include "frame.h"
@@ -118,18 +124,15 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #endif
 
 #ifdef WINDOWSNT
-#include <direct.h>
+# include <direct.h>
 /* In process.h which conflicts with the local copy.  */
-#define _P_WAIT 0
+# define _P_WAIT 0
 int _cdecl _spawnlp (int, const char *, const char *, ...);
 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
    several prototypes of functions called below.  */
-#include <sys/socket.h>
+# include <sys/socket.h>
 #endif
 
-#include "syssignal.h"
-#include "systime.h"
-
 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781.  */
 #ifndef ULLONG_MAX
 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
@@ -2704,30 +2707,6 @@ emacs_perror (char const *message)
   errno = err;
 }
 
-/* Return a struct timeval that is roughly equivalent to T.
-   Use the least timeval not less than T.
-   Return an extremal value if the result would overflow.  */
-struct timeval
-make_timeval (struct timespec t)
-{
-  struct timeval tv;
-  tv.tv_sec = t.tv_sec;
-  tv.tv_usec = t.tv_nsec / 1000;
-
-  if (t.tv_nsec % 1000 != 0)
-    {
-      if (tv.tv_usec < 999999)
-        tv.tv_usec++;
-      else if (tv.tv_sec < TYPE_MAXIMUM (time_t))
-        {
-          tv.tv_sec++;
-          tv.tv_usec = 0;
-        }
-    }
-
-  return tv;
-}
-
 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
    ATIME and MTIME, respectively.
    FD must be either negative -- in which case it is ignored --
@@ -3911,6 +3890,42 @@ system_process_attributes (Lisp_Object pid)
 }
 
 #endif  /* !defined (WINDOWSNT) */
+
+DEFUN ("get-internal-run-time", Fget_internal_run_time, Sget_internal_run_time,
+       0, 0, 0,
+       doc: /* Return the current run time used by Emacs.
+The time is returned as in the style of `current-time'.
+
+On systems that can't determine the run time, `get-internal-run-time'
+does the same thing as `current-time'.  */)
+  (void)
+{
+#ifdef HAVE_GETRUSAGE
+  struct rusage usage;
+  time_t secs;
+  int usecs;
+
+  if (getrusage (RUSAGE_SELF, &usage) < 0)
+    /* This shouldn't happen.  What action is appropriate?  */
+    xsignal0 (Qerror);
+
+  /* Sum up user time and system time.  */
+  secs = usage.ru_utime.tv_sec + usage.ru_stime.tv_sec;
+  usecs = usage.ru_utime.tv_usec + usage.ru_stime.tv_usec;
+  if (usecs >= 1000000)
+    {
+      usecs -= 1000000;
+      secs++;
+    }
+  return make_lisp_time (make_timespec (secs, usecs * 1000));
+#else /* ! HAVE_GETRUSAGE  */
+#ifdef WINDOWSNT
+  return w32_get_internal_run_time ();
+#else /* ! WINDOWSNT  */
+  return Fcurrent_time ();
+#endif /* WINDOWSNT  */
+#endif /* HAVE_GETRUSAGE  */
+}
 
 /* Wide character string collation.  */
 
@@ -4116,3 +4131,9 @@ str_collate (Lisp_Object s1, Lisp_Object s2,
   return res;
 }
 #endif  /* WINDOWSNT */
+
+void
+syms_of_sysdep (void)
+{
+  defsubr (&Sget_internal_run_time);
+}