X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffilevercmp.c;h=20522d1c4c387ae9b505ad8156b75d2a92a206ed;hb=31d3154399f8c679ba23afb0f6bef03b73d4c741;hp=7b40c98f7bff874f50b2b097749efe6447975d02;hpb=0443c2f39943017f0aaa0afacbf68fb725858963;p=gnulib.git

diff --git a/lib/filevercmp.c b/lib/filevercmp.c
index 7b40c98f7..20522d1c4 100644
--- a/lib/filevercmp.c
+++ b/lib/filevercmp.c
@@ -1,7 +1,7 @@
 /*
    Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
    Copyright (C) 2001 Anthony Towns <aj@azure.humbug.org.au>
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -27,7 +27,7 @@
 #include <limits.h>
 
 /* Match a file suffix defined by this regular expression:
-   /(\.[A-Za-z][A-Za-z0-9]*)*$/
+   /(\.[A-Za-z~][A-Za-z0-9~]*)*$/
    Scan the string *STR and return a pointer to the matching suffix, or
    NULL if not found.  Upon return, *STR points to terminating NUL.  */
 static const char *
@@ -40,7 +40,7 @@ match_suffix (const char **str)
       if (read_alpha)
         {
           read_alpha = false;
-          if (!c_isalpha (**str))
+          if (!c_isalpha (**str) && '~' != **str)
             match = NULL;
         }
       else if ('.' == **str)
@@ -49,7 +49,7 @@ match_suffix (const char **str)
           if (!match)
             match = *str;
         }
-      else if (!c_isalnum (**str))
+      else if (!c_isalnum (**str) && '~' != **str)
         match = NULL;
       (*str)++;
     }
@@ -135,11 +135,27 @@ filevercmp (const char *s1, const char *s2)
   if (simple_cmp == 0)
     return 0;
 
-  /* handle hidden files */
-  while (*s1 == '.' || *s2 == '.')
+  /* special handle for "", "." and ".." */
+  if (!*s1)
+    return -1;
+  if (!*s2)
+    return 1;
+  if (0 == strcmp (".", s1))
+    return -1;
+  if (0 == strcmp (".", s2))
+    return 1;
+  if (0 == strcmp ("..", s1))
+    return -1;
+  if (0 == strcmp ("..", s2))
+    return 1;
+
+  /* special handle for other hidden files */
+  if (*s1 == '.' && *s2 != '.')
+    return -1;
+  if (*s1 != '.' && *s2 == '.')
+    return 1;
+  if (*s1 == '.' && *s2 == '.')
     {
-      if (*s1 != *s2)
-	return *s1 - *s2;
       s1++;
       s2++;
     }