tesseract::DIR128 Class Reference

#include <mod128.h>

Public Member Functions
	DIR128 ()=default
	DIR128 (int16_t value)
	DIR128 (const FCOORD fc)
DIR128 &	operator= (int16_t value)
int8_t	operator- (const DIR128 &minus) const
DIR128	operator+ (const DIR128 &add) const
DIR128 &	operator+= (const DIR128 &add)
int8_t	get_dir () const

Public Attributes
int8_t	dir

Detailed Description

Definition at line 30 of file mod128.h.

Constructor & Destructor Documentation

DIR128() [1/3]

tesseract::DIR128::DIR128 ( )

default

DIR128() [2/3]

tesseract::DIR128::DIR128 ( int16_t  value )

inline

Definition at line 34 of file mod128.h.

                     { // value to assign
    value %= MODULUS;  // modulo arithmetic
    if (value < 0) {
      value += MODULUS; // done properly
    }
    dir = static_cast<int8_t>(value);
  }

DIR128() [3/3]

tesseract::DIR128::DIR128

(

const FCOORD

fc

)

Definition at line 51 of file mod128.cpp.

  {
  int high, low, current; // binary search
 
  low = 0;
  if (fc.y() == 0) {
    if (fc.x() >= 0) {
      dir = 0;
    } else {
      dir = MODULUS / 2;
    }
    return;
  }
  high = MODULUS;
  do {
    current = (high + low) / 2;
    if (dirtab[current] * fc >= 0) {
      low = current;
    } else {
      high = current;
    }
  } while (high - low > 1);
  dir = low;
}

Member Function Documentation

get_dir()

int8_t tesseract::DIR128::get_dir ( ) const

inline

Definition at line 79 of file mod128.h.

                         { // access function
    return dir;
  }

operator+()

DIR128 tesseract::DIR128::operator+ ( const DIR128 &  add ) const

inline

Definition at line 66 of file mod128.h.

  {
    DIR128 result; // sum
 
    result = dir + add.dir; // let = do the work
    return result;
  }

operator+=()

DIR128 & tesseract::DIR128::operator+= ( const DIR128 &  add )

inline

Definition at line 74 of file mod128.h.

                         {
    *this = dir + add.dir; // let = do the work
    return *this;
  }

operator-()

int8_t tesseract::DIR128::operator- ( const DIR128 &  minus ) const

inline

Definition at line 53 of file mod128.h.

  {
    // result
    int16_t result = dir - minus.dir;
 
    if (result > MODULUS / 2) {
      result -= MODULUS; // get in range
    } else if (result < -MODULUS / 2) {
      result += MODULUS;
    }
    return static_cast<int8_t>(result);
  }

operator=()

DIR128 & tesseract::DIR128::operator= ( int16_t  value )

inline

Definition at line 44 of file mod128.h.

                     { // value to assign
    value %= MODULUS;  // modulo arithmetic
    if (value < 0) {
      value += MODULUS; // done properly
    }
    dir = static_cast<int8_t>(value);
    return *this;
  }

Member Data Documentation

dir

int8_t tesseract::DIR128::dir

Definition at line 83 of file mod128.h.

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The documentation for this class was generated from the following files:

• /media/home/debian/src/github/tesseract-ocr/tesseract/src/ccstruct/mod128.h
• /media/home/debian/src/github/tesseract-ocr/tesseract/src/ccstruct/mod128.cpp