libport: Remove the strnlen() function replacement.

configure

@@ -17783,7 +17783,6 @@ for ac_func in \
 	setprogname \
 	settimeofday \
 	sigprocmask \
-	strnlen \
 	strtold \
 	symlink \
 	sysinfo \

configure.ac

@@ -2192,7 +2192,6 @@ AC_CHECK_FUNCS(\
 	setprogname \
 	settimeofday \
 	sigprocmask \
-	strnlen \
 	strtold \
 	symlink \
 	sysinfo \

dlls/wined3d/shader_sm4.c

@@ -1939,18 +1939,13 @@ static HRESULT parse_dxbc(const char *data, SIZE_T data_size,
 
 static const char *shader_get_string(const char *data, size_t data_size, DWORD offset)
 {
-    size_t len, max_len;
-
     if (offset >= data_size)
     {
         WARN("Invalid offset %#x (data size %#lx).\n", offset, (long)data_size);
         return NULL;
     }
 
-    max_len = data_size - offset;
-    len = strnlen(data + offset, max_len);
-
-    if (len == max_len)
+    if (!memchr( data + offset, 0, data_size - offset ))
         return NULL;
 
     return data + offset;

include/config.h.in

@@ -807,9 +807,6 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
-/* Define to 1 if you have the `strnlen' function. */
-#undef HAVE_STRNLEN
-
 /* Define to 1 if you have the <stropts.h> header file. */
 #undef HAVE_STROPTS_H
 

include/wine/port.h

@@ -273,10 +273,6 @@ ssize_t pwrite( int fd, const void *buf, size_t count, off_t offset );
 int readlink( const char *path, char *buf, size_t size );
 #endif /* HAVE_READLINK */
 
-#ifndef HAVE_STRNLEN
-size_t strnlen( const char *str, size_t maxlen );
-#endif /* !defined(HAVE_STRNLEN) */
-
 #ifndef HAVE_SYMLINK
 int symlink(const char *from, const char *to);
 #endif
@@ -296,7 +292,6 @@ extern int mkstemps(char *template, int suffix_len);
 #define lstat                   __WINE_NOT_PORTABLE(lstat)
 #define pread                   __WINE_NOT_PORTABLE(pread)
 #define pwrite                  __WINE_NOT_PORTABLE(pwrite)
-#define strnlen                 __WINE_NOT_PORTABLE(strnlen)
 #define usleep                  __WINE_NOT_PORTABLE(usleep)
 
 #endif /* NO_LIBWINE_PORT */

libs/port/Makefile.in

@@ -12,6 +12,5 @@ C_SRCS = \
 	pwrite.c \
 	readlink.c \
 	spawn.c \
-	strnlen.c \
 	symlink.c \
 	usleep.c

libs/port/strnlen.c

-/*
- * strnlen function
- *
- * Copyright 2017 Alexandre Julliard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "config.h"
-#include "wine/port.h"
-
-#ifndef HAVE_STRNLEN
-size_t strnlen( const char *str, size_t maxlen )
-{
-    const char *ptr = memchr( str, 0, maxlen );
-    if (!ptr) return maxlen;
-    return ptr - str;
-}
-#endif /* HAVE_STRNLEN */