From 94527665c27e664f480924dfdc2ace65ceec1a4b Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@redhat.com>
Date: Fri, 17 Jan 1992 08:30:31 +0000
Subject: Initial revision

---
 ar.c | 172 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 ar.c

diff --git a/ar.c b/ar.c
new file mode 100644
index 0000000..82e2e52
--- /dev/null
+++ b/ar.c
@@ -0,0 +1,172 @@
+/* Copyright (C) 1988, 1989, 1990, 1991 Free Software Foundation, Inc.
+This file is part of GNU Make.
+
+GNU Make is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Make 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Make; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "make.h"
+#include "file.h"
+
+
+/* Defined in arscan.c.  */
+extern long int ar_scan ();
+extern int ar_member_touch ();
+extern int ar_name_equal ();
+
+
+/* Return nonzero if NAME is an archive-member reference, zero if not.
+   An archive-member reference is a name like `lib(member)'.
+   If a name like `lib((entry))' is used, a fatal error is signaled at
+   the attempt to use this unsupported feature.  */
+
+int
+ar_name (name)
+     char *name;
+{
+  char *p = index (name, '('), *end = name + strlen (name) - 1;
+  
+  if (p == 0 || p == name || *end != ')')
+    return 0;
+
+  if (p[1] == '(' && end[-1] == ')')
+    fatal ("attempt to use unsupported feature: `%s'", name);
+
+  return 1;
+}
+
+
+/* Parse the archive-member reference NAME into the archive and member names.
+   Put the malloc'd archive name in *ARNAME_P if ARNAME_P is non-nil;
+   put the malloc'd member name in *MEMNAME_P if MEMNAME_P is non-nil.  */
+
+void
+ar_parse_name (name, arname_p, memname_p)
+     char *name, **arname_p, **memname_p;
+{
+  char *p = index (name, '('), *end = name + strlen (name) - 1;
+
+  if (arname_p != 0)
+    *arname_p = savestring (name, p - name);
+
+  if (memname_p != 0)
+    *memname_p = savestring (p + 1, end - (p + 1));
+}  
+
+static long int ar_member_date_1 ();
+
+/* Return the modtime of NAME.  */
+
+time_t
+ar_member_date (name)
+     char *name;
+{
+  char *arname;
+  int arname_used = 0;
+  char *memname;
+  long int val;
+
+  ar_parse_name (name, &arname, &memname);
+
+  /* Make sure we know the modtime of the archive itself because
+     we are likely to be called just before commands to remake a
+     member are run, and they will change the archive itself.  */
+  {
+    struct file *arfile;
+    arfile = lookup_file (arname);
+    if (arfile == 0)
+      {
+	arfile = enter_file (arname);
+	arname_used = 1;
+      }
+
+    (void) f_mtime (arfile, 0);
+  }
+
+  val = ar_scan (arname, ar_member_date_1, (long int) memname);
+
+  if (!arname_used)
+    free (arname);
+  free (memname);
+
+  return (val <= 0 ? (time_t) -1 : (time_t) val);
+}
+
+/* This function is called by `ar_scan' to find which member to look at.  */
+
+/* ARGSUSED */
+static long int
+ar_member_date_1 (desc, mem, hdrpos, datapos, size, date, uid, gid, mode, name)
+     int desc;
+     char *mem;
+     long int hdrpos, datapos, size, date;
+     int uid, gid, mode;
+     char *name;
+{
+  return ar_name_equal (name, mem) ? date : 0;
+}
+
+/* Set the archive-member NAME's modtime to now.  */
+
+int
+ar_touch (name)
+     char *name;
+{
+  char *arname, *memname;
+  int arname_used = 0;
+  register int val;
+
+  ar_parse_name (name, &arname, &memname);
+
+  /* Make sure we know the modtime of the archive itself before we
+     touch the member, since this will change the archive itself.  */
+  {
+    struct file *arfile;
+    arfile = lookup_file (arname);
+    if (arfile == 0)
+      {
+	arfile = enter_file (arname);
+	arname_used = 1;
+      }
+
+    (void) f_mtime (arfile, 0);
+  }
+
+  val = 1;
+  switch (ar_member_touch (arname, memname))
+    {
+    case -1:
+      error ("touch: Archive `%s' does not exist", arname);
+      break;
+    case -2:
+      error ("touch: `%s' is not a valid archive", arname);
+      break;
+    case -3:
+      perror_with_name ("touch: ", arname);
+      break;
+    case 1:
+      error ("touch: Member `%s' does not exist in `%s'", memname, arname);
+      break;
+    case 0:
+      val = 0;
+      break;
+    default:
+      error ("touch: Bad return code from ar_member_touch on `%s'", name);
+    }
+
+  if (!arname_used)
+    free (arname);
+  free (memname);
+
+  return val;
+}
-- 
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