include/linux/byteorder/generic.h - kernel/msm-4.9 - Gitiles

 #ifndef _LINUX_BYTEORDER_GENERIC_H
 #define _LINUX_BYTEORDER_GENERIC_H

 /*
  * linux/byteorder_generic.h
  * Generic Byte-reordering support
  *
  * Francois-Rene Rideau <fare@tunes.org> 19970707
  *    gathered all the good ideas from all asm-foo/byteorder.h into one file,
  *    cleaned them up.
  *    I hope it is compliant with non-GCC compilers.
  *    I decided to put __BYTEORDER_HAS_U64__ in byteorder.h,
  *    because I wasn't sure it would be ok to put it in types.h
  *    Upgraded it to 2.1.43
  * Francois-Rene Rideau <fare@tunes.org> 19971012
  *    Upgraded it to 2.1.57
  *    to please Linus T., replaced huge #ifdef's between little/big endian
  *    by nestedly #include'd files.
  * Francois-Rene Rideau <fare@tunes.org> 19971205
  *    Made it to 2.1.71; now a facelift:
  *    Put files under include/linux/byteorder/
  *    Split swab from generic support.
  *
  * TODO:
  *   = Regular kernel maintainers could also replace all these manual
  *    byteswap macros that remain, disseminated among drivers,
  *    after some grep or the sources...
  *   = Linus might want to rename all these macros and files to fit his taste,
  *    to fit his personal naming scheme.
  *   = it seems that a few drivers would also appreciate
  *    nybble swapping support...
  *   = every architecture could add their byteswap macro in asm/byteorder.h
  *    see how some architectures already do (i386, alpha, ppc, etc)
  *   = cpu_to_beXX and beXX_to_cpu might some day need to be well
  *    distinguished throughout the kernel. This is not the case currently,
  *    since little endian, big endian, and pdp endian machines needn't it.
  *    But this might be the case for, say, a port of Linux to 20/21 bit
  *    architectures (and F21 Linux addict around?).
  */

 /*
  * The following macros are to be defined by <asm/byteorder.h>:
  *
  * Conversion of long and short int between network and host format
  *	ntohl(__u32 x)
  *	ntohs(__u16 x)
  *	htonl(__u32 x)
  *	htons(__u16 x)
  * It seems that some programs (which? where? or perhaps a standard? POSIX?)
  * might like the above to be functions, not macros (why?).
  * if that's true, then detect them, and take measures.
  * Anyway, the measure is: define only ___ntohl as a macro instead,
  * and in a separate file, have
  * unsigned long inline ntohl(x){return ___ntohl(x);}
  *
  * The same for constant arguments
  *	__constant_ntohl(__u32 x)
  *	__constant_ntohs(__u16 x)
  *	__constant_htonl(__u32 x)
  *	__constant_htons(__u16 x)
  *
  * Conversion of XX-bit integers (16- 32- or 64-)
  * between native CPU format and little/big endian format
  * 64-bit stuff only defined for proper architectures
  *	cpu_to_[bl]eXX(__uXX x)
  *	[bl]eXX_to_cpu(__uXX x)
  *
  * The same, but takes a pointer to the value to convert
  *	cpu_to_[bl]eXXp(__uXX x)
  *	[bl]eXX_to_cpup(__uXX x)
  *
  * The same, but change in situ
  *	cpu_to_[bl]eXXs(__uXX x)
  *	[bl]eXX_to_cpus(__uXX x)
  *
  * See asm-foo/byteorder.h for examples of how to provide
  * architecture-optimized versions
  *
  */


 #if defined(__KERNEL__)
 /*
  * inside the kernel, we can use nicknames;
  * outside of it, we must avoid POSIX namespace pollution...
  */
 #define cpu_to_le64 __cpu_to_le64
 #define le64_to_cpu __le64_to_cpu
 #define cpu_to_le32 __cpu_to_le32
 #define le32_to_cpu __le32_to_cpu
 #define cpu_to_le16 __cpu_to_le16
 #define le16_to_cpu __le16_to_cpu
 #define cpu_to_be64 __cpu_to_be64
 #define be64_to_cpu __be64_to_cpu
 #define cpu_to_be32 __cpu_to_be32
 #define be32_to_cpu __be32_to_cpu
 #define cpu_to_be16 __cpu_to_be16
 #define be16_to_cpu __be16_to_cpu
 #define cpu_to_le64p __cpu_to_le64p
 #define le64_to_cpup __le64_to_cpup
 #define cpu_to_le32p __cpu_to_le32p
 #define le32_to_cpup __le32_to_cpup
 #define cpu_to_le16p __cpu_to_le16p
 #define le16_to_cpup __le16_to_cpup
 #define cpu_to_be64p __cpu_to_be64p
 #define be64_to_cpup __be64_to_cpup
 #define cpu_to_be32p __cpu_to_be32p
 #define be32_to_cpup __be32_to_cpup
 #define cpu_to_be16p __cpu_to_be16p
 #define be16_to_cpup __be16_to_cpup
 #define cpu_to_le64s __cpu_to_le64s
 #define le64_to_cpus __le64_to_cpus
 #define cpu_to_le32s __cpu_to_le32s
 #define le32_to_cpus __le32_to_cpus
 #define cpu_to_le16s __cpu_to_le16s
 #define le16_to_cpus __le16_to_cpus
 #define cpu_to_be64s __cpu_to_be64s
 #define be64_to_cpus __be64_to_cpus
 #define cpu_to_be32s __cpu_to_be32s
 #define be32_to_cpus __be32_to_cpus
 #define cpu_to_be16s __cpu_to_be16s
 #define be16_to_cpus __be16_to_cpus
 #endif


 #if defined(__KERNEL__)
 /*
  * Handle ntohl and suches. These have various compatibility
  * issues - like we want to give the prototype even though we
  * also have a macro for them in case some strange program
  * wants to take the address of the thing or something..
  *
  * Note that these used to return a "long" in libc5, even though
  * long is often 64-bit these days.. Thus the casts.
  *
  * They have to be macros in order to do the constant folding
  * correctly - if the argument passed into a inline function
  * it is no longer constant according to gcc..
  */

 #undef ntohl
 #undef ntohs
 #undef htonl
 #undef htons

 /*
  * Do the prototypes. Somebody might want to take the
  * address or some such sick thing..
  */
 extern __u32			ntohl(__be32);
 extern __be32			htonl(__u32);
 extern __u16			ntohs(__be16);
 extern __be16			htons(__u16);

 #if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__)

 #define ___htonl(x) __cpu_to_be32(x)
 #define ___htons(x) __cpu_to_be16(x)
 #define ___ntohl(x) __be32_to_cpu(x)
 #define ___ntohs(x) __be16_to_cpu(x)

 #define htonl(x) ___htonl(x)
 #define ntohl(x) ___ntohl(x)
 #define htons(x) ___htons(x)
 #define ntohs(x) ___ntohs(x)

 #endif /* OPTIMIZE */

 #endif /* KERNEL */


 #endif /* _LINUX_BYTEORDER_GENERIC_H */
	#ifndef _LINUX_BYTEORDER_GENERIC_H
	#define _LINUX_BYTEORDER_GENERIC_H

	/*
	* linux/byteorder_generic.h
	* Generic Byte-reordering support
	*
	* Francois-Rene Rideau <fare@tunes.org> 19970707
	* gathered all the good ideas from all asm-foo/byteorder.h into one file,
	* cleaned them up.
	* I hope it is compliant with non-GCC compilers.
	* I decided to put __BYTEORDER_HAS_U64__ in byteorder.h,
	* because I wasn't sure it would be ok to put it in types.h
	* Upgraded it to 2.1.43
	* Francois-Rene Rideau <fare@tunes.org> 19971012
	* Upgraded it to 2.1.57
	* to please Linus T., replaced huge #ifdef's between little/big endian
	* by nestedly #include'd files.
	* Francois-Rene Rideau <fare@tunes.org> 19971205
	* Made it to 2.1.71; now a facelift:
	* Put files under include/linux/byteorder/
	* Split swab from generic support.
	*
	* TODO:
	* = Regular kernel maintainers could also replace all these manual
	* byteswap macros that remain, disseminated among drivers,
	* after some grep or the sources...
	* = Linus might want to rename all these macros and files to fit his taste,
	* to fit his personal naming scheme.
	* = it seems that a few drivers would also appreciate
	* nybble swapping support...
	* = every architecture could add their byteswap macro in asm/byteorder.h
	* see how some architectures already do (i386, alpha, ppc, etc)
	* = cpu_to_beXX and beXX_to_cpu might some day need to be well
	* distinguished throughout the kernel. This is not the case currently,
	* since little endian, big endian, and pdp endian machines needn't it.
	* But this might be the case for, say, a port of Linux to 20/21 bit
	* architectures (and F21 Linux addict around?).
	*/

	/*
	* The following macros are to be defined by <asm/byteorder.h>:
	*
	* Conversion of long and short int between network and host format
	* ntohl(__u32 x)
	* ntohs(__u16 x)
	* htonl(__u32 x)
	* htons(__u16 x)
	* It seems that some programs (which? where? or perhaps a standard? POSIX?)
	* might like the above to be functions, not macros (why?).
	* if that's true, then detect them, and take measures.
	* Anyway, the measure is: define only ___ntohl as a macro instead,
	* and in a separate file, have
	* unsigned long inline ntohl(x){return ___ntohl(x);}
	*
	* The same for constant arguments
	* __constant_ntohl(__u32 x)
	* __constant_ntohs(__u16 x)
	* __constant_htonl(__u32 x)
	* __constant_htons(__u16 x)
	*
	* Conversion of XX-bit integers (16- 32- or 64-)
	* between native CPU format and little/big endian format
	* 64-bit stuff only defined for proper architectures
	* cpu_to_[bl]eXX(__uXX x)
	* [bl]eXX_to_cpu(__uXX x)
	*
	* The same, but takes a pointer to the value to convert
	* cpu_to_[bl]eXXp(__uXX x)
	* [bl]eXX_to_cpup(__uXX x)
	*
	* The same, but change in situ
	* cpu_to_[bl]eXXs(__uXX x)
	* [bl]eXX_to_cpus(__uXX x)
	*
	* See asm-foo/byteorder.h for examples of how to provide
	* architecture-optimized versions
	*
	*/


	#if defined(__KERNEL__)
	/*
	* inside the kernel, we can use nicknames;
	* outside of it, we must avoid POSIX namespace pollution...
	*/
	#define cpu_to_le64 __cpu_to_le64
	#define le64_to_cpu __le64_to_cpu
	#define cpu_to_le32 __cpu_to_le32
	#define le32_to_cpu __le32_to_cpu
	#define cpu_to_le16 __cpu_to_le16
	#define le16_to_cpu __le16_to_cpu
	#define cpu_to_be64 __cpu_to_be64
	#define be64_to_cpu __be64_to_cpu
	#define cpu_to_be32 __cpu_to_be32
	#define be32_to_cpu __be32_to_cpu
	#define cpu_to_be16 __cpu_to_be16
	#define be16_to_cpu __be16_to_cpu
	#define cpu_to_le64p __cpu_to_le64p
	#define le64_to_cpup __le64_to_cpup
	#define cpu_to_le32p __cpu_to_le32p
	#define le32_to_cpup __le32_to_cpup
	#define cpu_to_le16p __cpu_to_le16p
	#define le16_to_cpup __le16_to_cpup
	#define cpu_to_be64p __cpu_to_be64p
	#define be64_to_cpup __be64_to_cpup
	#define cpu_to_be32p __cpu_to_be32p
	#define be32_to_cpup __be32_to_cpup
	#define cpu_to_be16p __cpu_to_be16p
	#define be16_to_cpup __be16_to_cpup
	#define cpu_to_le64s __cpu_to_le64s
	#define le64_to_cpus __le64_to_cpus
	#define cpu_to_le32s __cpu_to_le32s
	#define le32_to_cpus __le32_to_cpus
	#define cpu_to_le16s __cpu_to_le16s
	#define le16_to_cpus __le16_to_cpus
	#define cpu_to_be64s __cpu_to_be64s
	#define be64_to_cpus __be64_to_cpus
	#define cpu_to_be32s __cpu_to_be32s
	#define be32_to_cpus __be32_to_cpus
	#define cpu_to_be16s __cpu_to_be16s
	#define be16_to_cpus __be16_to_cpus
	#endif


	#if defined(__KERNEL__)
	/*
	* Handle ntohl and suches. These have various compatibility
	* issues - like we want to give the prototype even though we
	* also have a macro for them in case some strange program
	* wants to take the address of the thing or something..
	*
	* Note that these used to return a "long" in libc5, even though
	* long is often 64-bit these days.. Thus the casts.
	*
	* They have to be macros in order to do the constant folding
	* correctly - if the argument passed into a inline function
	* it is no longer constant according to gcc..
	*/

	#undef ntohl
	#undef ntohs
	#undef htonl
	#undef htons

	/*
	* Do the prototypes. Somebody might want to take the
	* address or some such sick thing..
	*/
	extern __u32 ntohl(__be32);
	extern __be32 htonl(__u32);
	extern __u16 ntohs(__be16);
	extern __be16 htons(__u16);

	#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__)

	#define ___htonl(x) __cpu_to_be32(x)
	#define ___htons(x) __cpu_to_be16(x)
	#define ___ntohl(x) __be32_to_cpu(x)
	#define ___ntohs(x) __be16_to_cpu(x)

	#define htonl(x) ___htonl(x)
	#define ntohl(x) ___ntohl(x)
	#define htons(x) ___htons(x)
	#define ntohs(x) ___ntohs(x)

	#endif /* OPTIMIZE */

	#endif /* KERNEL */


	#endif /* _LINUX_BYTEORDER_GENERIC_H */