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#define V3P_NETLIB_SRC
#include "v3p_netlib.h"
#ifdef KR_headers
#ifdef IEEE_drem
double drem();
#else
double floor();
#endif
double d_mod(x,y) doublereal *x, *y;
#else
#ifdef IEEE_drem
double drem(double, double);
#else
#undef abs
#include "math.h"
#endif
double d_mod(doublereal *x, doublereal *y)
#endif
{
#ifdef IEEE_drem
double xa, ya, z;
if ((ya = *y) < 0.)
ya = -ya;
z = drem(xa = *x, ya);
if (xa > 0) {
if (z < 0)
z += ya;
}
else if (z > 0)
z -= ya;
return z;
#else
double quotient;
if( (quotient = *x / *y) >= 0)
quotient = floor(quotient);
else
quotient = -floor(-quotient);
return(*x - (*y) * quotient );
#endif
}
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