starfighter/code/math.h

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/*
Copyright (C) 2003 Parallel Realities
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
static inline void limitChar(signed char *in, int low, int high)
{
if (*in < low)
*in = low;
if (*in > high)
*in = high;
}
static inline void limitChar(unsigned char *in, int low, int high)
{
if (*in < low)
*in = low;
if (*in > high)
*in = high;
}
static inline void limitCharAdd(signed char *in, int add, int low, int high)
{
int tmp = (int)*in + add;
if (tmp < low)
tmp = low;
if (tmp > high)
tmp = high;
*in = tmp;
}
static inline void limitCharAdd(unsigned char *in, int add, int low, int high)
{
int tmp = (int)*in + add;
if (tmp < low)
tmp = low;
if (tmp > high)
tmp = high;
*in = tmp;
}
static inline void limitInt(int *in, int low, int high)
{
if (*in < low)
*in = low;
if (*in > high)
*in = high;
}
static inline void limitFloat(float *in, float low, float high)
{
if (*in < low)
*in = low;
if (*in > high)
*in = high;
}
static inline void wrapChar(signed char *in, signed char low, signed char high)
{
if (*in < low)
*in += high - low;
if (*in > high)
*in -= high - low;
}
static inline void wrapInt(int *in, int low, int high)
{
if (*in < low)
*in += high - low;
if (*in > high)
*in -= high - low;
}
static inline void wrapFloat(float *in, float low, float high)
{
if (*in < low)
*in += high - low;
if (*in > high)
*in -= high - low;
}
static inline int rrand(int min, int max)
{
int r = min;
max++;
if ((max - min) == 0)
return min;
r += rand() % (max - min);
return r;
}