dimen.cc

   1 #include <ctype.h>
   2 #include "dimen.hh"
   3 #include "debug.hh"
   4 #include "string.hh"
   5
   6 Real
   7 parse_dimen(String dim)
   8 {
   9     int i=dim.len()-1;
  10     const char *s = dim;
  11     while  (i > 0 && (isspace(s[i]) || isalpha(s[i])) ){
  12         i--;
  13     }
  14     String unit(s + i+1);
  15     return convert_dimen(dim.fvalue(), unit);
  16 }
  17
  18 const Real CM_TO_PT=72/2.54;
  19
  20 Real
  21 convert_dimen(Real quant, String unit)
  22 {
  23     if (unit == "cm")
  24         return quant * CM_TO_PT;
  25     if (unit == "pt")
  26         return quant;
  27     if (unit == "mm")
  28         return quant*CM_TO_PT/10;
  29     if (unit == "in")
  30         return quant * 72;
  31     error ("unknown length unit: `" + unit+"'");
  32 }
  33
  34 String
  35 print_dimen(Real r)
  36 {
  37     String s(r);
  38     s += "pt ";
  39     return s;
  40 }