1 files changed, 101 insertions, 0 deletions
diff --git a/contrib/cvs/src/no_diff.c b/contrib/cvs/src/no_diff.c
new file mode 100644
index 0000000..45847a1
--- /dev/null
+++ b/contrib/cvs/src/no_diff.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 1986-2005 The Free Software Foundation, Inc.
+ *
+ * Portions Copyright (C) 1998-2005 Derek Price, Ximbiot <http://ximbiot.com>,
+ *                                  and others.
+ *
+ * Portions Copyright (C) 1992, Brian Berliner and Jeff Polk
+ * Portions Copyright (C) 1989-1992, Brian Berliner
+ * 
+ * You may distribute under the terms of the GNU General Public License as
+ * specified in the README file that comes with the CVS source distribution.
+ * 
+ * No Difference
+ * 
+ * The user file looks modified judging from its time stamp; however it needn't
+ * be.  No_Difference() finds out whether it is or not. If it is not, it
+ * updates the administration.
+ * 
+ * returns 0 if no differences are found and non-zero otherwise
+ */
+
+#include "cvs.h"
+#include <assert.h>
+
+int
+No_Difference (finfo, vers)
+    struct file_info *finfo;
+    Vers_TS *vers;
+{
+    Node *p;
+    int ret;
+    char *ts, *options;
+    int retcode = 0;
+    char *tocvsPath;
+
+    /* If ts_user is "Is-modified", we can only conclude the files are
+       different (since we don't have the file's contents).  */
+    if (vers->ts_user != NULL
+	&& strcmp (vers->ts_user, "Is-modified") == 0)
+	return -1;
+
+    if (!vers->srcfile || !vers->srcfile->path)
+	return (-1);			/* different since we couldn't tell */
+
+#ifdef PRESERVE_PERMISSIONS_SUPPORT
+    /* If special files are in use, then any mismatch of file metadata
+       information also means that the files should be considered different. */
+    if (preserve_perms && special_file_mismatch (finfo, vers->vn_user, NULL))
+	return 1;
+#endif
+
+    if (vers->entdata && vers->entdata->options)
+	options = xstrdup (vers->entdata->options);
+    else
+	options = xstrdup ("");
+
+    tocvsPath = wrap_tocvs_process_file (finfo->file);
+    retcode = RCS_cmp_file( vers->srcfile, vers->vn_user, (char **)NULL,
+                            (char *)NULL, options,
+			    tocvsPath == NULL ? finfo->file : tocvsPath );
+    if (retcode == 0)
+    {
+	/* no difference was found, so fix the entries file */
+	ts = time_stamp (finfo->file);
+	Register (finfo->entries, finfo->file,
+		  vers->vn_user ? vers->vn_user : vers->vn_rcs, ts,
+		  options, vers->tag, vers->date, (char *) 0);
+#ifdef SERVER_SUPPORT
+	if (server_active)
+	{
+	    /* We need to update the entries line on the client side.  */
+	    server_update_entries
+	      (finfo->file, finfo->update_dir, finfo->repository, SERVER_UPDATED);
+	}
+#endif
+	free (ts);
+
+	/* update the entdata pointer in the vers_ts structure */
+	p = findnode (finfo->entries, finfo->file);
+	assert (p);
+	vers->entdata = p->data;
+
+	ret = 0;
+    }
+    else
+	ret = 1;			/* files were really different */
+
+    if (tocvsPath)
+    {
+	/* Need to call unlink myself because the noexec variable
+	 * has been set to 1.  */
+	if (trace)
+	    (void) fprintf (stderr, "%s-> unlink (%s)\n",
+			    CLIENT_SERVER_STR, tocvsPath);
+	if ( CVS_UNLINK (tocvsPath) < 0)
+	    error (0, errno, "could not remove %s", tocvsPath);
+    }
+
+    free (options);
+    return (ret);
+}