src/real/division/cl_R_ftrunc22.cc

   1 // ftruncate2().
   2
   3 // General includes.
   4 #include "cl_sysdep.h"
   5
   6 // Specification.
   7 #include "cl_real.h"
   8
   9
  10 // Implementation.
  11
  12 #include "cl_R.h"
  13 #include "cl_R_div_t.h"
  14
  15 const cl_R_fdiv_t ftruncate2 (const cl_R& x, const cl_R& y)
  16 {
  17 // Methode:
  18 // x,y beide rational: truncate(x,y), Quotienten in Float umwandeln.
  19 // Sonst: ftruncate(x/y) -> q,r. Liefere die Werte q und x-y*q = y*r.
  20         if (rationalp(x))
  21                 if (rationalp(y)) {
  22                         // beides rationale Zahlen
  23                         DeclareType(cl_RA,x);
  24                         DeclareType(cl_RA,y);
  25                         var cl_R_div_t q_r = truncate2(x,y);
  26                         var cl_I& q = q_r.quotient;
  27                         var cl_R& r = q_r.remainder;
  28                         return cl_R_fdiv_t(cl_float(q),r);
  29                 }
  30         var cl_R_fdiv_t q_r = ftruncate2(x/y);
  31         var cl_F& q = q_r.quotient;
  32         var cl_R& r = q_r.remainder;
  33         return cl_R_fdiv_t(q,y*r);
  34 }