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- #include "f2c.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"
- #ifdef __cplusplus
- extern "C" {
- #endif
- #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
- }
- #ifdef __cplusplus
- }
- #endif
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