From a038b4f9875d06be339d3abb33967ec9a89c2f8a Mon Sep 17 00:00:00 2001 From: iperry Date: Fri, 8 Jan 2010 01:22:43 +0000 Subject: changed math.h to wiring_math.h to avoid collision with newlib's math library git-svn-id: https://leaflabs.googlecode.com/svn/trunk/library@99 749a229e-a60e-11de-b98f-4500b42dc123 --- src/wiring/wiring_math.cpp | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/wiring/wiring_math.cpp (limited to 'src/wiring/wiring_math.cpp') diff --git a/src/wiring/wiring_math.cpp b/src/wiring/wiring_math.cpp new file mode 100644 index 0000000..9be7dc3 --- /dev/null +++ b/src/wiring/wiring_math.cpp @@ -0,0 +1,38 @@ +#include +#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; +} + + -- cgit v1.2.3