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author | Perry Hung <iperry@alum.mit.edu> | 2010-03-30 22:03:00 -0400 |
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committer | Perry Hung <iperry@alum.mit.edu> | 2010-03-30 22:03:00 -0400 |
commit | 2c33d55bae8f9e0e009634072ab05302fc734a65 (patch) | |
tree | 63285f96e795fc423cd5bf573340d12f6c8d5513 /core/wiring_math.cpp | |
parent | 23149e9706ff0a6a338e13804456dff4c655e34b (diff) | |
parent | 1d3861ef93f8423176c6010ab606abdab00a7cbd (diff) | |
download | librambutan-2c33d55bae8f9e0e009634072ab05302fc734a65.tar.gz librambutan-2c33d55bae8f9e0e009634072ab05302fc734a65.zip |
Merge branch 'master' into rcc-dev
Conflicts:
Makefile
Diffstat (limited to 'core/wiring_math.cpp')
-rw-r--r-- | core/wiring_math.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/core/wiring_math.cpp b/core/wiring_math.cpp new file mode 100644 index 0000000..9be7dc3 --- /dev/null +++ b/core/wiring_math.cpp @@ -0,0 +1,38 @@ +#include <stdlib.h> +#include "math.h" + +/* from newlib: + * + * rand returns the next pseudo-random integer in sequence; it is a number + * between 0 and RAND_MAX (inclusive). + * + * srand does not return a result. */ + + +/* The rest copied from WMath.cpp */ +void randomSeed(unsigned int seed) { + if (seed != 0) { + srand(seed); + } +} + +long random(long howbig) { + if (howbig == 0) { + return 0; + } + return rand() % howbig; +} + +long random(long howsmall, long howbig) { + if (howsmall >= howbig) { + return howsmall; + } + long diff = howbig - howsmall; + return random(diff) + howsmall; +} + +long map(long x, long in_min, long in_max, long out_min, long out_max) { + return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; +} + + |