This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x in repository nx-libs. commit 3937db18a203f9936387286b95328f27013a5ffe Author: Peter Hutterer <peter.hutterer@who-t.net> Date: Mon Jun 29 13:09:57 2009 +1000 include: introduce byte counting functions. This patch adds the following three functions: bits_to_bytes(bits) - the number of bytes needed to hold 'bits' bytes_to_int32(bytes) - the number of 4-byte units to hold 'bytes' pad_to_int32(bytes) - the closest multiple of 4 equal to or larger than 'bytes'. All three operations are common in protocol processing and currently the server has ((foo + 7)/8 + 3)/4 operations all over the place. A common set of functions reduce the error rate of these (albeit simple) calculations and improve readability of the code. The functions do not check for overflow. v2: backport to nx-libs 3.6.x as a prereq for the CVE-2015-0255 fix (Mike DePaulo) Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> --- nx-X11/programs/Xserver/include/misc.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/nx-X11/programs/Xserver/include/misc.h b/nx-X11/programs/Xserver/include/misc.h index 5944a42..849f1b5 100644 --- a/nx-X11/programs/Xserver/include/misc.h +++ b/nx-X11/programs/Xserver/include/misc.h @@ -193,6 +193,36 @@ typedef struct _xReq *xReqPtr; #endif +/** + * Calculate the number of bytes needed to hold bits. + * @param bits The minimum number of bits needed. + * @return The number of bytes needed to hold bits. + */ +static __inline__ int +bits_to_bytes(const int bits) { + return ((bits + 7) >> 3); +} +/** + * Calculate the number of 4-byte units needed to hold the given number of + * bytes. + * @param bytes The minimum number of bytes needed. + * @return The number of 4-byte units needed to hold bytes. + */ +static __inline__ int +bytes_to_int32(const int bytes) { + return (((bytes) + 3) >> 2); +} + +/** + * Calculate the number of bytes (in multiples of 4) needed to hold bytes. + * @param bytes The minimum number of bytes needed. + * @return The closest multiple of 4 that is equal or higher than bytes. + */ +static __inline__ int +pad_to_int32(const int bytes) { + return (((bytes) + 3) & ~3); +} + /* some macros to help swap requests, replies, and events */ #define LengthRestB(stuff) \ -- Alioth's /srv/git/_hooks_/post-receive-email on /srv/git/code.x2go.org/nx-libs.git