stpncpy: Allow stpncpy to be defined as a macro.

[gnulib.git] / lib / memchr2.c

diff --git a/lib/memchr2.c b/lib/memchr2.c
index 1eb8f9b..1ad936b 100644 (file)
--- a/lib/memchr2.c
+++ b/lib/memchr2.c
@@ -1,5 +1,5 @@
-/* Copyright (C) 1991, 1993, 1996, 1997, 1999, 2000, 2003, 2004, 2006,
-   2008 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1993, 1996, 1997, 1999, 2000, 2003, 2004, 2006, 2008,
+   2009, 2010 Free Software Foundation, Inc.
 
    Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
    with help from Dan Sahlin (dan@sics.se) and
@@ -29,8 +29,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdint.h>
 #include <string.h>
 
-#include "intprops.h"
-
 /* Return the first address of either C1 or C2 (treated as unsigned
    char) that occurs within N bytes of the memory region S.  If
    neither byte appears, return NULL.  */
@@ -42,7 +40,7 @@ memchr2 (void const *s, int c1_in, int c2_in, size_t n)
      performance.  On 64-bit hardware, unsigned long is generally 64
      bits already.  Change this typedef to experiment with
      performance.  */
-  typedef unsigned long longword;
+  typedef unsigned long int longword;
 
   const unsigned char *char_ptr;
   const longword *longword_ptr;
@@ -80,22 +78,22 @@ memchr2 (void const *s, int c1_in, int c2_in, size_t n)
   repeated_c2 = c2 | (c2 << 8);
   repeated_c1 |= repeated_c1 << 16;
   repeated_c2 |= repeated_c2 << 16;
-  if (0xffffffffU < TYPE_MAXIMUM (longword))
+  if (0xffffffffU < (longword) -1)
     {
       repeated_one |= repeated_one << 31 << 1;
       repeated_c1 |= repeated_c1 << 31 << 1;
       repeated_c2 |= repeated_c2 << 31 << 1;
       if (8 < sizeof (longword))
-       {
-         int i;
-
-         for (i = 64; i < sizeof (longword) * 8; i *= 2)
-           {
-             repeated_one |= repeated_one << i;
-             repeated_c1 |= repeated_c1 << i;
-             repeated_c2 |= repeated_c2 << i;
-           }
-       }
+        {
+          size_t i;
+
+          for (i = 64; i < sizeof (longword) * 8; i *= 2)
+            {
+              repeated_one |= repeated_one << i;
+              repeated_c1 |= repeated_c1 << i;
+              repeated_c2 |= repeated_c2 << i;
+            }
+        }
     }
 
   /* Instead of the traditional loop which tests each byte, we will test a
@@ -140,9 +138,9 @@ memchr2 (void const *s, int c1_in, int c2_in, size_t n)
       longword longword2 = *longword_ptr ^ repeated_c2;
 
       if (((((longword1 - repeated_one) & ~longword1)
-           | ((longword2 - repeated_one) & ~longword2))
-          & (repeated_one << 7)) != 0)
-       break;
+            | ((longword2 - repeated_one) & ~longword2))
+           & (repeated_one << 7)) != 0)
+        break;
       longword_ptr++;
       n -= sizeof (longword);
     }
@@ -159,7 +157,7 @@ memchr2 (void const *s, int c1_in, int c2_in, size_t n)
   for (; n > 0; --n, ++char_ptr)
     {
       if (*char_ptr == c1 || *char_ptr == c2)
-       return (void *) char_ptr;
+        return (void *) char_ptr;
     }
 
   return NULL;