GfMath

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GfMath.h

#ifndef __GFMATH_H__#define __GFMATH_H__u32 wordAbs(u32,u32);int intAbs(int, int);int byteAbs(int , int);int sameSign(int a,int b,int c);int getMid(int a,int b,int c);int inRange(int a,int b,int c);int getNext(int now,int pre);#endif

GfMath.c

#include "All_includes.h"u32 wordAbs(u32 a, u32 b){    if(a > b)        return (a - b);    else        return (b - a);}int intAbs(int a, int b){    if(a > b)        return (int)(a - b);    else        return (int)(b - a);}int byteAbs(int a, int b){    if(a > b)        return (int)(a - b);    else        return (int)(b - a);}int sameSign(int a,int b,int c){    if ( a==200 || b==200 || c==200 ) return 0;    if ( byteAbs(a,b)>5 || byteAbs(b,c)>5 || byteAbs(a,c)>5 ) return 0;    if ( a<=b && b<=c || a>=b && b>=c ) return 1;    return 0;}int getMid(int a,int b,int c){     if(a > b){a ^= b ^= a ^= b}  if(b > c){b ^= c ^= b ^= c}  if(a > b){a ^= b ^= a ^= b}  return b;}int inRange(int pre,int now,int next){    if (now == pre && pre == 0)    {              //允许跳一半        if (next < 80) return 1;        else return 0;    }    if (now == pre && pre == 160)    {        if (next > 80) return 1;        else return 0;    }    if (pre > now)    {        if (next <= now)        {            if (MAX((now << 1) - pre - 5, 0) <= next) return 1;        }        else         {            if (pre - now + next - now < 5) return 1;        }    }    else     {                   if (next >= now){            if (next <= MIN((now << 1) - pre + 5, 160)) return 1;        }        else         {            if (now - pre + now - next < 5) return 1;        }    }                return 0;}int getNext(int now,int pre){    int next;    if ( now > pre )    {                  next = MIN((int)((now << 1) - pre), 160);                }    else if ((now << 1) > pre)    {        next = (now << 1) - pre;    }    else next = 0;    return next;}