| #include "f2c.h" |
| |
| #ifdef KR_headers |
| #ifdef IEEE_drem |
| double drem(); |
| #else |
| double floor(); |
| #endif |
| double r_mod(x,y) real *x, *y; |
| #else |
| #ifdef IEEE_drem |
| double drem(double, double); |
| #else |
| #undef abs |
| #include <math.h> |
| #endif |
| double r_mod(real *x, real *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 = (double)*x / *y) >= 0) |
| quotient = floor(quotient); |
| else |
| quotient = -floor(-quotient); |
| return(*x - (*y) * quotient ); |
| #endif |
| } |
