| #include "f2c.h" | |
| #ifdef IEEE_drem | |
| double drem (double, double); | |
| #else | |
| #undef abs | |
| #include <math.h> | |
| #endif | |
| double | |
| d_mod (doublereal * x, doublereal * y) | |
| { | |
| #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 | |
| } |