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132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
#ifndef _STDINC_H_
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#define _STDINC_H_
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#include <stdio.h>
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#include <math.h>
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#ifndef AND
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#define AND &&
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#define OR ||
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#define NOT !
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#endif
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#ifndef true
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#define true 1
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#define false 0
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#endif
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#ifndef Bool
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typedef char Bool;
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#endif
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#ifndef MAX
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#define MAX(a,b) ((a)>(b) ? (a) : (b))
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#define MIN(a,b) ((a)<(b) ? (a) : (b))
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#endif
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#ifndef ABS
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#define ABS(a) ((a)>=0 ? (a) : (-(a)))
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#endif
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/********* TOGGLE_BOOL(boolean) : toggles values of 'boolean' ******/
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#ifndef TOGGLE_BOOL
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#define TOGGLE_BOOL(a) ((a)=1-(a))
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#endif
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/******************** bit comparisons and operations ***************/
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#ifndef TEST_BIT
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#define TEST_BIT( x, b ) (((x) & (1<<(b))) != 0 )
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#define SET_BIT( x, b ) ((x) |= (1 << (b)))
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#define CLEAR_BIT( x, b ) ((x) &= ~(1 << (b)))
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#define TOGGLE_BIT( x, b ) ((TEST_BIT(x,b)) ?(CLEAR_BIT(x,b)):(SET_BIT(x,b)))
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#endif
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#ifndef TEST_AND
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#define TEST_AND( a, b ) ((a&b)==b)
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#endif
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#ifndef M_PI
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#define M_PI 3.141592654
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#endif
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typedef char String[81];
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/*********** flush the stdout and stderr output streams *************/
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#ifndef flushout
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#define flushout fflush(stdout)
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#define flusherr fflush(stderr)
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#endif
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/********** Debugging functions *************************************/
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#ifndef error_return
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#define error_return( c ); {fprintf(stderr,c);return;}
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#endif
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/************************* floating-point random ********************/
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#ifndef randf
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#define randf() ((float) rand() / (float)RAND_MAX )
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#endif
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#ifndef SIGN
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#define SIGN(x) ((x)>=0 ? 1 : -1)
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#endif
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/****************** conversion between degrees and radians **********/
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#ifndef DEG2RAD
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#define DEG2RAD(x) ((x)/180.0*M_PI)
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#define RAD2DEG(x) ((x)/M_PI*180.0)
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#endif
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/***************** clamp a value to some fixed interval *************/
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#ifndef CLAMP
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#define CLAMP(x,lo,hi) {if ((x) < (lo)) {(x)=(lo);} else if((x) > (hi)) {(x)=(hi);}}
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#endif
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/************ check if a value lies within a closed interval *********/
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#ifndef IN_BOUNDS
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#define IN_BOUNDS( x, lo, hi ) ( (x) >= (lo) AND (x) <= (hi) )
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#endif
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/************ check if a 2D point lies within a 2D box ***************/
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#ifndef PT_IN_BOX
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#define PT_IN_BOX( x, y, lo_x, hi_x, lo_y, hi_y ) \
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( IN_BOUNDS(x,lo_x,hi_x) AND IN_BOUNDS(y,lo_y,hi_y) )
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#endif
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/****** check if value lies on proper side of another value *****/
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/*** if side is positive => proper side is positive, else negative **/
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#ifndef CHECK_PROPER_SIDE
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#define CHECK_PROPER_SIDE(x,val,side) ((side) > 0 ? (x) > (val) : (x) < (val))
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#endif
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/***** Small value when we want to do a comparison to 'close to zero' *****/
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#ifndef FUDGE
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#define FUDGE .00001
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#endif
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/******************* swap two values, using a temp variable *********/
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#ifndef SWAP2
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#define SWAP2(a,b,t) {t=a;a=b;b=t;}
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#endif
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#define VEC3_TO_ARRAY(v,a) a[0]=v[0], a[1]=v[1], a[2]=v[2]
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#endif /* _STDINC_H_ */
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