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author | Peter Hutterer <peter.hutterer@who-t.net> | 2009-06-29 13:09:57 +1000 |
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committer | Mike DePaulo <mikedep333@gmail.com> | 2015-02-17 21:23:43 -0500 |
commit | 3937db18a203f9936387286b95328f27013a5ffe (patch) | |
tree | 8da4e05a2c24642612ad684cb68db76fd220a1b5 /nx-X11/programs/Xserver/mi/midispcur.c | |
parent | d6ce946f9c0bb5746b8333b3f589aa8527739431 (diff) | |
download | nx-libs-3937db18a203f9936387286b95328f27013a5ffe.tar.gz nx-libs-3937db18a203f9936387286b95328f27013a5ffe.tar.bz2 nx-libs-3937db18a203f9936387286b95328f27013a5ffe.zip |
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>
Diffstat (limited to 'nx-X11/programs/Xserver/mi/midispcur.c')
0 files changed, 0 insertions, 0 deletions