|author||Rich Felker <email@example.com>||2018-10-18 13:53:44 -0400|
|committer||Rich Felker <firstname.lastname@example.org>||2018-10-18 13:59:17 -0400|
adjust types in FILE struct to make line buffering check less expensive
the choice of signed char for lbf was a theoretically space-saving hack that was not helping, and was unwantedly expensive. while comparing bytes against a byte-sized member sounds easy, the trick here was that the byte to be compared was unsigned while the lbf member was signed, making it possible to set lbf negative to disable line buffering. however, this imposed a requirement to promote both operands, zero-extending one and sign-extending the other, in order to compare them. to fix this, repurpose the waiters count slot (unused since commit c21f750727515602a9e84f2a190ee8a0a2aeb2a1). while we're at it, switch mode (orientation) from signed char to int as well. this makes no semantic difference (its only possible values are -1, 0, and 1) but it might help on archs where byte access is awkward.
Diffstat (limited to 'src/internal/locale_impl.h')
0 files changed, 0 insertions, 0 deletions