hwrecordc.hh

手写识别是模式识别中研究得一个热点

/****************************************************************

 Description:

This module allows HWHeaderC and HWRecordC objects to be read and
written to/from the C++ stream objects.  Return characters are
automatically appended to the output line.

 Examples:

        ifstream F("hello.hw", ios::in || ios::nocreate);
	HWHeaderC Header;
	F >> Header;
	HWRecordC Rec1, Rec2;
	F >> Rec1 >> Rec2;

	ofstream F("hello.hw", ios::out);
	HWHeaderC Header;
	strcpy(Header.String, "hello");
	F << Header;
	while (<not done reading user input>) {
	  HWRecordC Rec;
	  <get input point from user into Rec>
  	  F << Rec;
	}

****************************************************************/


#include <fstream.h>
#include <string.h>

struct HWHeaderC {
  HWHeaderC() 
    {
      strcpy(Magic, "HW_file");
      strcpy(String, "");
    }

  IsValid() {return strcmp(Magic, "HW_file") == 0;}

  // A magic string.
  char Magic[20];

  // The letter, word, or string written in the file.  An
  // empty string if it is unknown.
  char String[80];
};


// If unknown, XTilt, YTilt, and Pressure can be filled with the value -1.
// XPos and YPos must be non-negative.
struct DataPointC {
  DataPointC() {
    XPos = YPos = 0;
    XTilt = YTilt = Pressure = -1;
  }

  // The co-ordinates of the point in any units.  Must 
  // be positive.
  long XPos, YPos;

  // Stylus tilt in degrees along the X and Y axis.  
  // This record would be unused by
  // the digitizing tablet we have, but could be faked or
  // used by other digitizing tablets.
  long XTilt, YTilt;

  // Pressure or width of the pen stroke in some units.
  long Pressure;
};


struct HWRecordC {
  HWRecordC()
    {
      Type = Time = 0;
    }

  // The "type" of the record.
  // 0 = A data record.
  // 1 = A pen down event.
  // 2 = A pen up event.
  // 3 = A character boundary.
  // 4 = A word boundary.
  // 5 = End of file (EOF).
  int Type;

  // The time, in ms, between the first record in the file 
  // and this record.
  long Time;

  // If type == 0, then this is the data point of the data record.
  DataPointC DataPoint;
};


ostream& operator << (ostream& outfile, HWHeaderC Header);
ostream& operator << (ostream& outfile, HWRecordC Record);
istream& operator >> (istream& infile, HWHeaderC& Header);
istream& operator >> (istream& infile, HWRecordC& Record);