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| author | Henrik Rydberg <rydberg@euromail.se> | 2010-05-14 01:10:17 +0200 |
|---|---|---|
| committer | Henrik Rydberg <rydberg@euromail.se> | 2010-05-14 01:41:39 +0200 |
| commit | 2b271ed5348daec2bcf90b83da47781e2d8b964c (patch) | |
| tree | 1828f251cf4b7d4f6a66a6af67c2681998f2483e /src/common.h | |
| parent | f02210172efc6bfc05c4598c14e1268d2828097e (diff) | |
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janitor: Move min/max and dist functions up to common.h
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Diffstat (limited to 'src/common.h')
| -rw-r--r-- | src/common.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/common.h b/src/common.h index 1b4d007..32be48d 100644 --- a/src/common.h +++ b/src/common.h @@ -61,6 +61,22 @@ #define SETBIT(m, x) (m |= BITMASK(x)) #define CLEARBIT(m, x) (m &= ~BITMASK(x)) +static inline int maxval(int x, int y) { return x > y ? x : y; } +static inline int minval(int x, int y) { return x < y ? x : y; } + +static inline int clamp15(int x) +{ + return x < -32767 ? -32767 : x > 32767 ? 32767 : x; +} + +/* absolute scale is assumed to fit in 15 bits */ +static inline int dist2(int dx, int dy) +{ + dx = clamp15(dx); + dy = clamp15(dy); + return dx * dx + dy * dy; +} + /* Count number of bits (Sean Eron Andersson's Bit Hacks) */ static inline int bitcount(unsigned v) { |