ChapterConversions: conversions.d

import tango.convert.Atoi,
  tango.convert.Double,
  tango.convert.DGDouble,
  tango.convert.Format,
  tango.convert.Integer,
  tango.convert.Rfc1123,
  tango.convert.Sprint,
  tango.convert.Unicode,
  tango.convert.UnicodeBom,
  tango.convert.Type,
  tango.io.Stdout;




void main ()
{
  
  char [] i = "+2100";
  char [] r = "2006.21";
  char [] d = "2006.314159";


  /* String to Number conversions */


  int integer = Atoi.parse(i);

  int alternate = Integer.parse(i);

  double double_ = Double.parse(r);

  real real_ = DGDouble.parse(d); // for extended accuracy

  Stdout("Integer [ %d:%d ], DGDouble [ %r ], Double [ %d ]",integer,alternate,real_ , double_).newline;


  /* Number to String conversions */


  char [64] intBuffer;
  char [64] floatBuffer;
  char [64] realBuffer;

  char [] intString = Integer.format(intBuffer,32 );

  char [] floatString = Double.format(floatBuffer,45 );

  char [] realString = DGDouble.format(realBuffer,32.65798,3 );

  Stdout("Integer [ %s ], Double [ %s ], DGDouble [ %s ] ",intString,floatString,realString ).newline;

  

  /* HTTP date conversions , accepts strings in RFC1123 format*/

  char [] date = "Sun, 06 Nov 1994 08:49:37 GMT";

  ulong secondsSinceEpoch = Rfc1123.parse(date);
  
  char [100] dateBuffer;

  char [] dateString = Rfc1123.format(dateBuffer,secondsSinceEpoch);

  Stdout("secondsSinceEpoch [ %d] , dateString [ %s ]",secondsSinceEpoch,dateString ).newline;

  
  /* String formatting , replaces vsprintf() style functions*/

  // struct based sprint with no precision specifiers, all stack based

  char [100] stackSprintString;

  SprintStruct stackSprint;

  stackSprint.ctor(stackSprintString);
  
  char [] stringWithNoPrecision = stackSprint("%s %s %s - %d ","All your base","are","belong to us",2100 );

  Stdout(stringWithNoPrecision).newline;

  // class based sprint with precision specifiers, we use Double.format 
  
  Sprint sprint = new Sprint(100, &Double.format);

  char [] stringWithPrecision = sprint ( "%s is %d times %2.3f","Julio",32, 5.68732 );

  Stdout(stringWithPrecision).newline;


  /* converting to / from UTF8, UTF16, UTF32, both Big Endian and Little Endian */

  char [] str = "Marry had a little endian";

  wchar [] wstr = Unicode.toUtf16(str);

  dchar [] dstr = Unicode.toUtf32(str);

  char [] newStr = Unicode.toUtf8(wstr); // and back again

  newStr = Unicode.toUtf8(dstr); //and back again

  Stdout(newStr).newline;

  // or the alternate way

  Unicode.Into!(char) into; //  char is what converting into
  
  char [] catchAllConverter = cast(char[])into.convert(cast(void[])wstr /* what you want to convert*/,Type.Utf16 /* the type the your converting _from_ */);
  Stdout(catchAllConverter).newline;


  /* Converting content to unicode for writing files.  See alsio tango.io.UnicodeFile .*/

  char [] bubbleBoy = "What you've never seen anyone in a bubble  before ?";

  // since were just encoding and not reading in ( if we were reading in the encoding would be figured out by the BOM ) , have to sepcify big or little endian

  UnicodeBomT!(char) bom = new UnicodeBomT!(char)(Unicode.UTF_16BE);

  void [] encoded = bom.encode(bubbleBoy );

  Stdout(cast(char[])bubbleBoy );


}