flower/scalar.cc

   1 #if 0
   2 /*
   3   scalar.cc -- implement Scalar
   4
   5   source file of the Flower Library
   6
   7   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   8 */
   9
  10 #include <assert.h>
  11 #include <stdio.h>
  12
  13 #include "rational.hh"
  14
  15 Scalar::Scalar (Rational r)
  16 {
  17   (*this) = r.str ();
  18 }
  19
  20 Scalar::operator Rational ()
  21 {
  22   return to_rat ();
  23 }
  24
  25 Rational
  26 Scalar::to_rat () const
  27 {
  28   int p = index_i ('/');
  29   if (p == -1)
  30     return this->to_i ();
  31
  32   String s2 = right_str (length_i ()-p-1);
  33   String s1 = left_str (p);
  34
  35   return Rational (s1.value_i (), s2.value_i ());
  36 }
  37
  38 bool
  39 Scalar::isdir_b () const
  40 {
  41   int conv = length_i ();
  42   if (conv)
  43     {
  44       long l =0;
  45       conv = sscanf (strh_.ch_C (), "%ld", &l);
  46       conv = conv && (l >= -1 && l <= 1);
  47     }
  48   return conv;
  49 }
  50
  51 bool
  52 Scalar::isnum_b () const
  53 {
  54   int conv = false;
  55   if (length_i ())
  56     {
  57       long l =0;
  58       conv = sscanf (strh_.ch_C (), "%lf", &l);
  59     }
  60   return length_i () && conv;
  61 }
  62
  63 Scalar::operator Real()
  64 {
  65   return to_f ();
  66 }
  67
  68 Real
  69 Scalar::to_f () const
  70 {
  71   assert (isnum_b ());
  72   return value_f ();
  73 }
  74
  75 Scalar::operator int ()
  76 {
  77   return to_i ();
  78 }
  79
  80 int
  81 Scalar::to_i () const
  82 {
  83   if (!length_i ())
  84     return 0;                   // ugh
  85
  86   assert (isnum_b());
  87   return value_i ();
  88 }
  89
  90 Scalar::operator bool () const
  91 {
  92   return to_bool ();
  93 }
  94
  95 bool
  96 Scalar::to_bool () const
  97 {
  98   if (!length_i ())
  99     return false;
 100   if (*this == "0")
 101     return false;
 102   String u (*this);
 103   if (u.upper_str () == "FALSE")
 104     return false;
 105   return true;
 106 }
 107
 108
 109 #endif