File hton-identity.patch of Package glibc.i686

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File hton-identity.patch of Package glibc.i686

2017-01-11  Joseph Myers  <joseph@codesourcery.com>

[BZ #16458]
	* bits/uintn-identity.h: New file.
	* inet/netinet/in.h: Include <bits/uintn-identity.h>.
	[__BYTE_ORDER == __BIG_ENDIAN] (ntohl): Use __uint32_identity.
	[__BYTE_ORDER == __BIG_ENDIAN] (ntohs): Use __uint16_identity.
	[__BYTE_ORDER == __BIG_ENDIAN] (htonl): Use __uint32_identity.
	[__BYTE_ORDER == __BIG_ENDIAN] (htohs): Use __uint16_identity.
	* string/endian.h: Include <bits/uintn-identity.h>.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (htole16): Use
	__uint16_identity.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (le16toh): Likewise.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (htole32): Use
	__uint32_identity.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (le32toh): Likewise.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (htole64): Use
	__uint64_identity.
	[__BYTE_ORDER == __LITTLE_ENDIAN] (le64toh): Likewise.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (htobe16): Use
	__uint16_identity.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (be16toh): Likewise.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (htobe32): Use
	__uint32_identity.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (be32toh): Likewise.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (htobe64): Use
	__uint64_identity.
	[__BYTE_ORDER != __LITTLE_ENDIAN] (be64toh): Likewise.
	* string/Makefile (headers): Add bits/uintn-identity.h.
	(tests): Add test-endian-types.
	* string/test-endian-types.c: New file.
	* inet/Makefile (tests): Add test-hnto-types.
	* inet/test-hnto-types.c: New file.

Index: glibc-2.22/bits/uintn-identity.h
===================================================================
--- /dev/null
+++ glibc-2.22/bits/uintn-identity.h
@@ -0,0 +1,50 @@
+/* Inline functions to return unsigned integer values unchanged.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#if !defined _NETINET_IN_H && !defined _ENDIAN_H
+# error "Never use <bits/uintn-identity.h> directly; include <netinet/in.h> or <endian.h> instead."
+#endif
+
+#ifndef _BITS_UINTN_IDENTITY_H
+#define _BITS_UINTN_IDENTITY_H 1
+
+#include <bits/types.h>
+
+/* These inline functions are to ensure the appropriate type
+   conversions and associated diagnostics from macros that convert to
+   a given endianness.  */
+
+static __inline __uint16_t
+__uint16_identity (__uint16_t __x)
+{
+  return __x;
+}
+
+static __inline __uint32_t
+__uint32_identity (__uint32_t __x)
+{
+  return __x;
+}
+
+static __inline __uint64_t
+__uint64_identity (__uint64_t __x)
+{
+  return __x;
+}
+
+#endif /* _BITS_UINTN_IDENTITY_H.  */
Index: glibc-2.22/inet/netinet/in.h
===================================================================
--- glibc-2.22.orig/inet/netinet/in.h
+++ glibc-2.22/inet/netinet/in.h
@@ -383,6 +383,7 @@ extern uint16_t htons (uint16_t __hostsh
 
 /* Get machine dependent optimized versions of byte swapping functions.  */
 #include <bits/byteswap.h>
+#include <bits/uintn-identity.h>
 
 #ifdef __OPTIMIZE__
 /* We can optimize calls to the conversion functions.  Either nothing has
@@ -391,10 +392,10 @@ extern uint16_t htons (uint16_t __hostsh
 # if __BYTE_ORDER == __BIG_ENDIAN
 /* The host byte order is the same as network byte order,
    so these functions are all just identity.  */
-# define ntohl(x)	(x)
-# define ntohs(x)	(x)
-# define htonl(x)	(x)
-# define htons(x)	(x)
+# define ntohl(x)	__uint32_identity (x)
+# define ntohs(x)	__uint16_identity (x)
+# define htonl(x)	__uint32_identity (x)
+# define htons(x)	__uint16_identity (x)
 # else
 #  if __BYTE_ORDER == __LITTLE_ENDIAN
 #   define ntohl(x)	__bswap_32 (x)
Index: glibc-2.22/string/Makefile
===================================================================
--- glibc-2.22.orig/string/Makefile
+++ glibc-2.22/string/Makefile
@@ -24,7 +24,8 @@ include ../Makeconfig
 
 headers	:= string.h strings.h memory.h endian.h bits/endian.h \
 	   argz.h envz.h byteswap.h bits/byteswap.h bits/byteswap-16.h \
-	   bits/string.h bits/string2.h bits/string3.h
+	   bits/string.h bits/string2.h bits/string3.h \
+	   bits/uintn-identity.h
 
 routines	:= strcat strchr strcmp strcoll strcpy strcspn		\
 		   strverscmp strdup strndup				\
Index: glibc-2.22/string/endian.h
===================================================================
--- glibc-2.22.orig/string/endian.h
+++ glibc-2.22/string/endian.h
@@ -58,37 +58,38 @@
 #if defined __USE_MISC && !defined __ASSEMBLER__
 /* Conversion interfaces.  */
 # include <bits/byteswap.h>
+# include <bits/uintn-identity.h>
 
 # if __BYTE_ORDER == __LITTLE_ENDIAN
 #  define htobe16(x) __bswap_16 (x)
-#  define htole16(x) (x)
+#  define htole16(x) __uint16_identity (x)
 #  define be16toh(x) __bswap_16 (x)
-#  define le16toh(x) (x)
+#  define le16toh(x) __uint16_identity (x)
 
 #  define htobe32(x) __bswap_32 (x)
-#  define htole32(x) (x)
+#  define htole32(x) __uint32_identity (x)
 #  define be32toh(x) __bswap_32 (x)
-#  define le32toh(x) (x)
+#  define le32toh(x) __uint32_identity (x)
 
 #  define htobe64(x) __bswap_64 (x)
-#  define htole64(x) (x)
+#  define htole64(x) __uint64_identity (x)
 #  define be64toh(x) __bswap_64 (x)
-#  define le64toh(x) (x)
+#  define le64toh(x) __uint64_identity (x)
 
 # else
-#  define htobe16(x) (x)
+#  define htobe16(x) __uint16_identity (x)
 #  define htole16(x) __bswap_16 (x)
-#  define be16toh(x) (x)
+#  define be16toh(x) __uint16_identity (x)
 #  define le16toh(x) __bswap_16 (x)
 
-#  define htobe32(x) (x)
+#  define htobe32(x) __uint32_identity (x)
 #  define htole32(x) __bswap_32 (x)
-#  define be32toh(x) (x)
+#  define be32toh(x) __uint32_identity (x)
 #  define le32toh(x) __bswap_32 (x)
 
-#  define htobe64(x) (x)
+#  define htobe64(x) __uint64_identity (x)
 #  define htole64(x) __bswap_64 (x)
-#  define be64toh(x) (x)
+#  define be64toh(x) __uint64_identity (x)
 #  define le64toh(x) __bswap_64 (x)
 # endif
 #endif

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File hton-identity.patch of Package glibc.i686

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