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| author | Kevin O'Connor <kevin@koconnor.net> | 2016-10-08 20:28:43 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2016-10-10 11:31:56 -0400 |
| commit | 9fa0a62c8a0990178aa2f0485d48ee7aaf975e7a (patch) | |
| tree | c0b06d84526ccf92b5c2159c1f5d5cb634aa95fe /klippy | |
| parent | 9faa0fbd25b948fc5fd7144a68ad03803d61784e (diff) | |
| download | kutter-9fa0a62c8a0990178aa2f0485d48ee7aaf975e7a.tar.gz kutter-9fa0a62c8a0990178aa2f0485d48ee7aaf975e7a.tar.xz kutter-9fa0a62c8a0990178aa2f0485d48ee7aaf975e7a.zip | |
stepcompress: Eliminate possible infinite loop in compress_bisect_add()
Commit 47f30331 converted compress_bisect_add() to use "best reach"
instead of "best add". However, that change caused
compress_bisect_add() to behave poorly when passed in invalid data
(negative times). Change the code to better handle invalid data.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'klippy')
| -rw-r--r-- | klippy/stepcompress.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/klippy/stepcompress.c b/klippy/stepcompress.c index 584bde04..55cb09e8 100644 --- a/klippy/stepcompress.c +++ b/klippy/stepcompress.c @@ -142,7 +142,7 @@ compress_bisect_add(struct stepcompress *sc) struct points point = minmax_point(sc, sc->queue_pos); int32_t outer_mininterval = point.minp, outer_maxinterval = point.maxp; int32_t add = 0, minadd = -0x8001, maxadd = 0x8000; - int32_t bestinterval = 0, bestcount = 0, bestadd = 0, bestreach = 0; + int32_t bestinterval = 0, bestcount = 1, bestadd = 0, bestreach = INT32_MIN; for (;;) { // Find longest valid sequence with the given 'add' |