src/rational/input/cl_RA_readparsed.cc

   1 // read_rational().
   2
   3 // General includes.
   4 #include "base/cl_sysdep.h"
   5
   6 // Specification.
   7 #include "cln/rational_io.h"
   8
   9
  10 // Implementation.
  11
  12 #include "rational/cl_RA.h"
  13 #include "integer/cl_I.h"
  14 #include "base/cl_N.h"
  15
  16 namespace cln {
  17
  18 const cl_RA read_rational (unsigned int base, cl_signean sign, const char * string, uintC index1, uintC index3, uintC index2)
  19 {
  20         var uintC index3_1 = index3+1; // Index der ersten Nennerziffer
  21         var cl_I den = // Nenner
  22           digits_to_I(&string[index3_1],index2-index3_1,(uintD)base);
  23         if (zerop(den)) // Division durch 0 abfangen
  24                 { throw division_by_0_exception(); }
  25         var cl_I num = // Zähler
  26           digits_to_I(&string[index1],index3-index1,(uintD)base);
  27         if (!(sign == 0))
  28                 num = -num; // incl. Vorzeichen
  29         return I_posI_div_RA(num,den);
  30 }
  31
  32 }  // namespace cln