UnicodeText::const_iterator Class Reference

#include <unicodetext.h>

Public Types
typedef std::bidirectional_iterator_tag	iterator_category
typedef char32	value_type
typedef ptrdiff_t	difference_type
typedef void	pointer
typedef const char32	reference

Public Member Functions
	const_iterator ()
	const_iterator (const const_iterator &other)
const_iterator &	operator= (const const_iterator &other)
char32	operator* () const
const_iterator &	operator++ ()
const_iterator	operator++ (int)
const_iterator &	operator-- ()
const_iterator	operator-- (int)
int	get_utf8 (char *buf) const
string	get_utf8_string () const
int	utf8_length () const
const char *	utf8_data () const
string	DebugString () const

Friends
class	UnicodeText
class	UnicodeTextUtils
class	UTF8StateTableProperty
bool	operator== (const CI &lhs, const CI &rhs)
bool	operator!= (const CI &lhs, const CI &rhs)
bool	operator< (const CI &lhs, const CI &rhs)
bool	operator> (const CI &lhs, const CI &rhs)
bool	operator<= (const CI &lhs, const CI &rhs)
bool	operator>= (const CI &lhs, const CI &rhs)
difference_type	distance (const CI &first, const CI &last)

Detailed Description

Definition at line 181 of file unicodetext.h.

Member Typedef Documentation

difference_type

typedef ptrdiff_t UnicodeText::const_iterator::difference_type

Definition at line 187 of file unicodetext.h.

iterator_category

typedef std::bidirectional_iterator_tag UnicodeText::const_iterator::iterator_category

Definition at line 185 of file unicodetext.h.

pointer

typedef void UnicodeText::const_iterator::pointer

Definition at line 188 of file unicodetext.h.

reference

typedef const char32 UnicodeText::const_iterator::reference

Definition at line 189 of file unicodetext.h.

value_type

typedef char32 UnicodeText::const_iterator::value_type

Definition at line 186 of file unicodetext.h.

Constructor & Destructor Documentation

const_iterator() [1/2]

UnicodeText::const_iterator::const_iterator

(

)

Definition at line 398 of file unicodetext.cc.

: it_(nullptr) {}

const_iterator() [2/2]

UnicodeText::const_iterator::const_iterator

(

const const_iterator &

other

)

Definition at line 400 of file unicodetext.cc.

: it_(other.it_) {}

Member Function Documentation

DebugString()

string UnicodeText::const_iterator::DebugString

(

)

const

get_utf8()

int UnicodeText::const_iterator::get_utf8

(

char *

buf

)

const

Definition at line 454 of file unicodetext.cc.

                                                               {
  utf8_output[0] = it_[0];
  if ((it_[0] & 0xff) < 0x80)
    return 1;
  utf8_output[1] = it_[1];
  if ((it_[0] & 0xff) < 0xE0)
    return 2;
  utf8_output[2] = it_[2];
  if ((it_[0] & 0xff) < 0xF0)
    return 3;
  utf8_output[3] = it_[3];
  return 4;
}

get_utf8_string()

string UnicodeText::const_iterator::get_utf8_string

(

)

const

Definition at line 468 of file unicodetext.cc.

                                                        {
  return string(utf8_data(), utf8_length());
}

operator*()

char32 UnicodeText::const_iterator::operator*

(

)

const

Definition at line 420 of file unicodetext.cc.

                                                  {
  // (We could call chartorune here, but that does some
  // error-checking, and we're guaranteed that our data is valid
  // UTF-8. Also, we expect this routine to be called very often. So
  // for speed, we do the calculation ourselves.)
 
  // Convert from UTF-8
  unsigned char byte1 = it_[0];
  if (byte1 < 0x80)
    return byte1;
 
  unsigned char byte2 = it_[1];
  if (byte1 < 0xE0)
    return ((byte1 & 0x1F) << 6) | (byte2 & 0x3F);
 
  unsigned char byte3 = it_[2];
  if (byte1 < 0xF0)
    return ((byte1 & 0x0F) << 12) | ((byte2 & 0x3F) << 6) | (byte3 & 0x3F);
 
  unsigned char byte4 = it_[3];
  return ((byte1 & 0x07) << 18) | ((byte2 & 0x3F) << 12) | ((byte3 & 0x3F) << 6) | (byte4 & 0x3F);
}

operator++() [1/2]

UnicodeText::const_iterator & UnicodeText::const_iterator::operator++

(

)

Definition at line 443 of file unicodetext.cc.

                                                                 {
  it_ += UniLib::OneCharLen(it_);
  return *this;
}

operator++() [2/2]

const_iterator UnicodeText::const_iterator::operator++ ( int  )

inline

Definition at line 201 of file unicodetext.h.

                                   { // (iter++)
      const_iterator result(*this);
      ++*this;
      return result;
    }

operator--() [1/2]

UnicodeText::const_iterator & UnicodeText::const_iterator::operator--

(

)

Definition at line 448 of file unicodetext.cc.

                                                                 {
  while (UniLib::IsTrailByte(*--it_))
    ;
  return *this;
}

operator--() [2/2]

const_iterator UnicodeText::const_iterator::operator-- ( int  )

inline

Definition at line 208 of file unicodetext.h.

                                   { // (iter--)
      const_iterator result(*this);
      --*this;
      return result;
    }

operator=()

UnicodeText::const_iterator & UnicodeText::const_iterator::operator=

(

const const_iterator &

other

)

Definition at line 402 of file unicodetext.cc.

                                                                                           {
  if (&other != this)
    it_ = other.it_;
  return *this;
}

utf8_data()

const char * UnicodeText::const_iterator::utf8_data ( ) const

inline

Definition at line 244 of file unicodetext.h.

                                  {
      return it_;
    }

utf8_length()

int UnicodeText::const_iterator::utf8_length

(

)

const

Definition at line 472 of file unicodetext.cc.

                                                 {
  if ((it_[0] & 0xff) < 0x80) {
    return 1;
  } else if ((it_[0] & 0xff) < 0xE0) {
    return 2;
  } else if ((it_[0] & 0xff) < 0xF0) {
    return 3;
  } else {
    return 4;
  }
}

Friends And Related Function Documentation

distance

difference_type distance ( const CI &  first, const CI &  last  )

friend

Definition at line 44 of file unicodetext.cc.

                                                                                             {
  return CodepointDistance(first.it_, last.it_);
}

operator!=

bool operator!= ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 218 of file unicodetext.h.

                                                         {
      return !(lhs == rhs);
    }

operator<

bool operator< ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 416 of file unicodetext.cc.

                                                                                           {
  return lhs.it_ < rhs.it_;
}

operator<=

bool operator<= ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 225 of file unicodetext.h.

                                                         {
      return !(rhs < lhs);
    }

operator==

bool operator== ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 215 of file unicodetext.h.

                                                         {
      return lhs.it_ == rhs.it_;
    }

operator>

bool operator> ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 222 of file unicodetext.h.

                                                        {
      return rhs < lhs;
    }

operator>=

bool operator>= ( const CI &  lhs, const CI &  rhs  )

friend

Definition at line 228 of file unicodetext.h.

                                                         {
      return !(lhs < rhs);
    }

UnicodeText

friend class UnicodeText

friend

Definition at line 251 of file unicodetext.h.

UnicodeTextUtils

friend class UnicodeTextUtils

friend

Definition at line 252 of file unicodetext.h.

UTF8StateTableProperty

friend class UTF8StateTableProperty

friend

Definition at line 253 of file unicodetext.h.

---

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

• /media/home/debian/src/github/tesseract-ocr/tesseract/unittest/util/utf8/unicodetext.h
• /media/home/debian/src/github/tesseract-ocr/tesseract/unittest/util/utf8/unicodetext.cc