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| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-10-30 14:21:15 -0400 |
|---|---|---|
| committer | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-11-03 16:28:12 -0500 |
| commit | 265f83fd35977a80e93b3cc13ceb65f52f129a3c (patch) | |
| tree | 201254e4c394e0f977d78b66be9e7cf16174c486 /COPYING.LGPLv2.1 | |
| parent | 03f5bcd92123f632ef3f24f3acde050431423099 (diff) | |
avutil/common: add FFDIFFSIGN macro
This is of use for defining comparator callbacks. Common approaches like
return x-y are not safe due to the risks of overflow.
Furthermore, the (x > y) - (x < y) trick is optimized to branchless
code.
This also documents this macro accordingly.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Diffstat (limited to 'COPYING.LGPLv2.1')
0 files changed, 0 insertions, 0 deletions