/cln-1.3.2/src/rational/input/cl_RA_readparsed.cc
C++ | 32 lines | 20 code | 8 blank | 4 comment | 3 complexity | d6b7ed645c6c55dfb653ce25500a7648 MD5 | raw file
Possible License(s): GPL-2.0
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
16namespace cln {
17
18const 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 = // Z?hler
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