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Date:	Thu, 12 Aug 2010 21:12:46 -0300
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Subject:	Re: diff /usr/include/endian.orig.h /usr/include/endian.h > endian.h.diff
From:	Pedro Izecksohn <pedro DOT izecksohn AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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--- Eric Blake wrote:
> Christopher Faylor wrote:
>> I wrote:
>>> =C2=A0I hope this list accepts attachments.
>>
>> It does but the list mind-reading gizmo is on the fritz.
>
> Translation - a ChangeLog entry justifying your changes, a diff in
> unified or context format (-u or -c) rather than the default ed format,
> and attaching the patch inline with a text/plain MIME type instead of
> base64 encoded, are all necessary before anyone is likely to act on your
> proposed patch.

Defines macros for to convert the endianness of 16, 32 and 64 bits
integer types.

diff -c /usr/include/endian.orig.h /usr/include/endian.h
*** /usr/include/endian.orig.h	Mon Apr 12 14:09:58 2010
--- /usr/include/endian.h	Thu Aug 12 19:40:20 2010
***************
*** 36,40 ****
  #elif __BYTE_ORDER =3D=3D __BIG_ENDIAN
  # define __LONG_LONG_PAIR(HI, LO) HI, LO
  #endif
- #endif /*_ENDIAN_H_*/

--- 36,82 ----
  #elif __BYTE_ORDER =3D=3D __BIG_ENDIAN
  # define __LONG_LONG_PAIR(HI, LO) HI, LO
  #endif

+ #ifdef _BSD_SOURCE
+ #if __BYTE_ORDER =3D=3D __LITTLE_ENDIAN
+
+ #include <byteswap.h>
+
+ #define htobe16(x) bswap_16(x)
+ #define htobe32(x) bswap_32(x)
+ #define htobe64(x) bswap_64(x)
+
+ #define be16toh(x) bswap_16(x)
+ #define be32toh(x) bswap_32(x)
+ #define be64toh(x) bswap_64(x)
+
+ #define htole16(x) (x)
+ #define htole32(x) (x)
+ #define htole64(x) (x)
+
+ #define le16toh(x) (x)
+ #define le32toh(x) (x)
+ #define le64toh(x) (x)
+
+ #else /* __BYTE_ORDER =3D=3D __BIG_ENDIAN */
+
+ #define htobe16(x) (x)
+ #define htobe32(x) (x)
+ #define htobe64(x) (x)
+
+ #define be16toh(x) (x)
+ #define be32toh(x) (x)
+ #define be64toh(x) (x)
+
+ #define htole16(x) bswap_16(x)
+ #define htole32(x) bswap_32(x)
+ #define htole64(x) bswap_64(x)
+
+ #define le16toh(x) bswap_16(x)
+ #define le32toh(x) bswap_32(x)
+ #define le64toh(x) bswap_64(x)
+
+ #endif
+ #endif /*_BSD_SOURCE*/
+
+ #endif /*_ENDIAN_H_*/

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