testfilters.c
#include <stdio.h>

typedef float      RtFloat;

RtFloat
   RiBoxFilter( RtFloat x, RtFloat y, RtFloat xwidth, RtFloat ywidth ),
   RiTriangleFilter( RtFloat x, RtFloat y, RtFloat xwidth, RtFloat ywidth ),
   RiCatmullRomFilter( RtFloat x, RtFloat y, RtFloat xwidth, RtFloat ywidth ),
   RiGaussianFilter( RtFloat x, RtFloat y, RtFloat xwidth, RtFloat ywidth ),
   RiSincFilter( RtFloat x, RtFloat y, RtFloat xwidth, RtFloat ywidth );

#define BOX
#define WIDTH 3.0

int main(int argc, char **argv)
{
   float d;
   float x,y;
   

   y = 0.;
   for ( x = 0.; x <= WIDTH; x+=0.01 )
     {
#ifdef BOX
	d = RiBoxFilter( x, y, WIDTH, WIDTH );
#endif
#ifdef TRIANGLE
	d = RiTriangleFilter( x, y, WIDTH, WIDTH );
#endif

#ifdef CATMULLROM
	d = RiCatmullRomFilter( x, y, WIDTH, WIDTH );
#endif

#ifdef GAUSSIAN
	d = RiGaussianFilter( x, y, WIDTH, WIDTH );
#endif

#ifdef SINC
	d = RiSincFilter( x, y, WIDTH, WIDTH );
#endif

	printf( "v %g %g %g\n", x, y, d );
     }

   printf("cstype bspline\n");
   printf("deg 1\n");
   printf("g Obj_curve#1\n");
   printf("curv ");
   for ( x = 0.,d=0.; x <= WIDTH; x+=0.01,d+=1.0 )
      printf( "%g %g ",d,d);
   printf("\n");
   printf("end\n");
   printf("g\n");

   return 0;
}

Makefile
all: testprman testrdc

testprman: test.c
	cc -g -n32 -o testprman test.c \
		/usr/local/prman/prman/lib/libprman.a -lm

testrdc: test.c
	cc -g -n32 -o testrdc test.c \
		/usr/local/rdc/lib32/mips4/librdc.so \
		/usr/local/rdc/lib32/mips4/libsl.so

clean:
	rm testprman testrdc