/* memrchr -- find the last occurrence of a byte in a memory block
- Copyright (C) 1991, 93, 96, 97, 99, 2000 Free Software Foundation, Inc.
+
+ Copyright (C) 1991, 1993, 1996, 1997, 1999, 2000, 2003 Free
+ Software Foundation, Inc.
+
Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
with help from Dan Sahlin (dan@sics.se) and
commentary by Jim Blandy (jimb@ai.mit.edu);
#endif
#include <stdlib.h>
-
-#undef __ptr_t
-#if defined (__cplusplus) || (defined (__STDC__) && __STDC__)
-# define __ptr_t void *
-#else /* Not C++ or ANSI C. */
-# define __ptr_t char *
-#endif /* C++ or ANSI C. */
+#include <string.h>
#if defined (_LIBC)
-# include <string.h>
# include <memcopy.h>
#else
# define reg_char char
#endif
-#if defined (HAVE_LIMITS_H) || defined (_LIBC)
-# include <limits.h>
-#endif
+#include <limits.h>
#define LONG_MAX_32_BITS 2147483647
-#ifndef LONG_MAX
-# define LONG_MAX LONG_MAX_32_BITS
-#endif
-
#include <sys/types.h>
#undef __memrchr
#endif
/* Search no more than N bytes of S for C. */
-__ptr_t
-__memrchr (s, c_in, n)
- const __ptr_t s;
- int c_in;
- size_t n;
+void *
+__memrchr (void const *s, int c_in, size_t n)
{
const unsigned char *char_ptr;
const unsigned long int *longword_ptr;
& (sizeof (longword) - 1)) != 0;
--n)
if (*--char_ptr == c)
- return (__ptr_t) char_ptr;
+ return (void *) char_ptr;
/* All these elucidatory comments refer to 4-byte longwords,
but the theory applies equally well to 8-byte longwords. */
#if LONG_MAX > 2147483647
if (cp[7] == c)
- return (__ptr_t) &cp[7];
+ return (void *) &cp[7];
if (cp[6] == c)
- return (__ptr_t) &cp[6];
+ return (void *) &cp[6];
if (cp[5] == c)
- return (__ptr_t) &cp[5];
+ return (void *) &cp[5];
if (cp[4] == c)
- return (__ptr_t) &cp[4];
+ return (void *) &cp[4];
#endif
if (cp[3] == c)
- return (__ptr_t) &cp[3];
+ return (void *) &cp[3];
if (cp[2] == c)
- return (__ptr_t) &cp[2];
+ return (void *) &cp[2];
if (cp[1] == c)
- return (__ptr_t) &cp[1];
+ return (void *) &cp[1];
if (cp[0] == c)
- return (__ptr_t) cp;
+ return (void *) cp;
}
n -= sizeof (longword);
while (n-- > 0)
{
if (*--char_ptr == c)
- return (__ptr_t) char_ptr;
+ return (void *) char_ptr;
}
return 0;