src/rational/input/cl_RA_readparsed.cc

   1 // read_rational().
   2
   3 // General includes.
   4 #include "cl_sysdep.h"
   5
   6 // Specification.
   7 #include "cl_rational_io.h"
   8
   9
  10 // Implementation.
  11
  12 #include "cl_RA.h"
  13 #include "cl_I.h"
  14 #include "cl_N.h"
  15
  16 const cl_RA read_rational (unsigned int base, cl_signean sign, const char * string, uintL index1, uintL index3, uintL index2)
  17 {
  18         var uintL index3_1 = index3+1; // Index der ersten Nennerziffer
  19         var cl_I den = // Nenner
  20           digits_to_I(&string[index3_1],index2-index3_1,(uintD)base);
  21         if (zerop(den)) // Division durch 0 abfangen
  22                 { cl_error_division_by_0(); }
  23         var cl_I num = // Zähler
  24           digits_to_I(&string[index1],index3-index1,(uintD)base);
  25         if (!(sign == 0))
  26                 num = -num; // incl. Vorzeichen
  27         return I_posI_div_RA(num,den);
  28 }