From 4972b017b63f3ce324bfa65a1b46a2a173baf463 Mon Sep 17 00:00:00 2001
From: Paul Smith <psmith@gnu.org>
Date: Tue, 13 Jun 2000 05:22:52 +0000
Subject: * Some timestamp fixes from Paul Eggert. * Fix compilation on Linux;
 use libintl.h and not gettext.h when using   the system gettext.

---
 file.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 50 insertions(+), 10 deletions(-)

(limited to 'file.c')

diff --git a/file.c b/file.c
index daaea69..b583db9 100644
--- a/file.c
+++ b/file.c
@@ -475,8 +475,8 @@ snap_deps ()
 	{
 	  /* Mark this file as phony and nonexistent.  */
 	  f2->phony = 1;
-	  f2->last_mtime = (FILE_TIMESTAMP) -1;
-	  f2->mtime_before_update = (FILE_TIMESTAMP) -1;
+	  f2->last_mtime = NONEXISTENT_MTIME;
+	  f2->mtime_before_update = NONEXISTENT_MTIME;
 	}
 
   for (f = lookup_file (".INTERMEDIATE"); f != 0; f = f->prev)
@@ -564,35 +564,73 @@ set_command_state (file, state)
     d->file->command_state = state;
 }
 
+/* Convert an external file timestamp to internal form.  */
+
+FILE_TIMESTAMP
+file_timestamp_cons (fname, s, ns)
+     char const *fname;
+     time_t s;
+     int ns;
+{
+  int offset = ORDINARY_MTIME_MIN + (FILE_TIMESTAMP_HI_RES ? ns : 0);
+  FILE_TIMESTAMP product = (FILE_TIMESTAMP) s << FILE_TIMESTAMP_LO_BITS;
+  FILE_TIMESTAMP ts = product + offset;
+
+  if (! (s <= FILE_TIMESTAMP_S (ORDINARY_MTIME_MAX)
+	 && product <= ts && ts <= ORDINARY_MTIME_MAX))
+    {
+      char buf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];
+      ts = s <= OLD_MTIME ? ORDINARY_MTIME_MIN : ORDINARY_MTIME_MAX;
+      file_timestamp_sprintf (buf, ts);
+      error (NILF, _("%s: Timestamp out of range; substituting %s"),
+	     fname ? fname : _("Current time"), buf);
+    }
+    
+  return ts;
+}
+
 /* Get and print file timestamps.  */
 
 FILE_TIMESTAMP
 file_timestamp_now ()
 {
+  time_t s;
+  int ns;
+
   /* Don't bother with high-resolution clocks if file timestamps have
      only one-second resolution.  The code below should work, but it's
      not worth the hassle of debugging it on hosts where it fails.  */
-  if (1 < FILE_TIMESTAMPS_PER_S)
+  if (FILE_TIMESTAMP_HI_RES)
     {
 #if HAVE_CLOCK_GETTIME && defined CLOCK_REALTIME
       {
 	struct timespec timespec;
 	if (clock_gettime (CLOCK_REALTIME, &timespec) == 0)
-	  return FILE_TIMESTAMP_FROM_S_AND_NS (timespec.tv_sec,
-					       timespec.tv_nsec);
+	  {
+	    s = timespec.tv_sec;
+	    ns = timespec.tv_nsec;
+	    goto got_time;
+	  }
       }
 #endif
 #if HAVE_GETTIMEOFDAY
       {
 	struct timeval timeval;
 	if (gettimeofday (&timeval, 0) == 0)
-	  return FILE_TIMESTAMP_FROM_S_AND_NS (timeval.tv_sec,
-					       timeval.tv_usec * 1000);
+	  {
+	    s = timeval.tv_sec;
+	    ns = timeval.tv_usec * 1000;
+	    goto got_time;
+	  }
       }
 #endif
     }
 
-  return FILE_TIMESTAMP_FROM_S_AND_NS (time ((time_t *) 0), 0);
+  s = time ((time_t *) 0);
+  ns = 0;
+
+ got_time:
+  return file_timestamp_cons (0, s, ns);
 }
 
 void
@@ -666,10 +704,12 @@ print_file (f)
 	printf (" %s", dep_name (d));
       putchar ('\n');
     }
-  if (f->last_mtime == 0)
+  if (f->last_mtime == UNKNOWN_MTIME)
     puts (_("#  Modification time never checked."));
-  else if (f->last_mtime == (FILE_TIMESTAMP) -1)
+  else if (f->last_mtime == NONEXISTENT_MTIME)
     puts (_("#  File does not exist."));
+  else if (f->last_mtime == OLD_MTIME)
+    puts (_("#  File is very old."));
   else
     {
       char buf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1];
-- 
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