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| Commit | Line | Data |
|---|---|---|
| 547779a8 WH |
1 | #include "f2c.h" |
| 2 | ||
| 3 | #ifdef KR_headers | |
| 4 | #ifdef IEEE_drem | |
| 5 | double drem(); | |
| 6 | #else | |
| 7 | double floor(); | |
| 8 | #endif | |
| 9 | double r_mod(x,y) real *x, *y; | |
| 10 | #else | |
| 11 | #ifdef IEEE_drem | |
| 12 | double drem(double, double); | |
| 13 | #else | |
| 14 | #undef abs | |
| 15 | #include "math.h" | |
| 16 | #endif | |
| 17 | double r_mod(real *x, real *y) | |
| 18 | #endif | |
| 19 | { | |
| 20 | #ifdef IEEE_drem | |
| 21 | double xa, ya, z; | |
| 22 | if ((ya = *y) < 0.) | |
| 23 | ya = -ya; | |
| 24 | z = drem(xa = *x, ya); | |
| 25 | if (xa > 0) { | |
| 26 | if (z < 0) | |
| 27 | z += ya; | |
| 28 | } | |
| 29 | else if (z > 0) | |
| 30 | z -= ya; | |
| 31 | return z; | |
| 32 | #else | |
| 33 | double quotient; | |
| 34 | if( (quotient = (double)*x / *y) >= 0) | |
| 35 | quotient = floor(quotient); | |
| 36 | else | |
| 37 | quotient = -floor(-quotient); | |
| 38 | return(*x - (*y) * quotient ); | |
| 39 | #endif | |
| 40 | } |