X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fmemcoll.c;h=a2decfe27c47806ded45cd40046771e5c96fcc8a;hb=443b16b2043248e0a3e527c6674a8202df1a7eca;hp=11a61ad60c5535ba065fea018d76da7a8f24abb4;hpb=8b13b4035ef3cd79149f4a555a84ac632aa73e03;p=gnulib.git

diff --git a/lib/memcoll.c b/lib/memcoll.c
index 11a61ad60..a2decfe27 100644
--- a/lib/memcoll.c
+++ b/lib/memcoll.c
@@ -1,5 +1,5 @@
 /* Locale-specific memory comparison.
-   Copyright 1999 Free Software Foundation, Inc.
+   Copyright 1999, 2002 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
@@ -21,62 +21,33 @@
 # include <config.h>
 #endif
 
-#ifndef __GNUC__
-# ifdef HAVE_ALLOCA_H
-#  include <alloca.h>
-# else
-#  ifdef _AIX
- #  pragma alloca
-#  else
-#   ifdef _WIN32
-#    include <malloc.h>
-#    include <io.h>
-#   else
-#    ifndef alloca
-char *alloca ();
-#    endif
-#   endif
-#  endif
-# endif
+#include <errno.h>
+#ifndef errno
+extern int errno;
 #endif
 
+#include <sys/types.h>
+
 #if HAVE_STRING_H
 # include <string.h>
 #endif
 
 /* Compare S1 (with length S1LEN) and S2 (with length S2LEN) according
-   to the LC_COLLATE locale.  S1 and S2 do not overlap, but may be
+   to the LC_COLLATE locale.  S1 and S2 do not overlap, and are not
    adjacent.  Temporarily modify the bytes after S1 and S2, but
-   restore their original contents before returning.  */
+   restore their original contents before returning.  Set errno to an
+   error number if there is an error, and to zero otherwise.  */
 int
 memcoll (char *s1, size_t s1len, char *s2, size_t s2len)
 {
   int diff;
-  char n1;
-  char n2;
-
-  /* We will temporarily set the bytes after S1 and S2 to zero, so if
-     S1 and S2 are adjacent, compare to a temporary copy of the
-     earlier, to avoid temporarily stomping on the later.  */
-
-  if (s1 + s1len == s2)
-    {
-      char *s2copy = alloca (s2len + 1);
-      memcpy (s2copy, s2, s2len);
-      s2 = s2copy;
-    }
-
-  if (s2 + s2len == s1)
-    {
-      char *s1copy = alloca (s1len + 1);
-      memcpy (s1copy, s1, s1len);
-      s1 = s1copy;
-    }
+  char n1 = s1[s1len];
+  char n2 = s2[s2len];
 
-  n1 = s1[s1len];  s1[s1len++] = '\0';
-  n2 = s2[s2len];  s2[s2len++] = '\0';
+  s1[s1len++] = '\0';
+  s2[s2len++] = '\0';
 
-  while (! (diff = strcoll (s1, s2)))
+  while (! (errno = 0, (diff = strcoll (s1, s2)) || errno))
     {
       /* strcoll found no difference, but perhaps it was fooled by NUL
 	 characters in the data.  Work around this problem by advancing