CHAR_FRAGMENT Class Reference

#include <unicharset.h>

Public Member Functions
void	set_all (const char *unichar, int pos, int total, bool natural)
void	set_unichar (const char *uch)
void	set_pos (int p)
void	set_total (int t)
const char *	get_unichar () const
int	get_pos () const
int	get_total () const
STRING	to_string () const
bool	equals (const char *other_unichar, int other_pos, int other_total) const
bool	equals (const CHAR_FRAGMENT *other) const
bool	is_continuation_of (const CHAR_FRAGMENT *fragment) const
bool	is_beginning () const
bool	is_ending () const
bool	is_natural () const
void	set_natural (bool value)

Static Public Member Functions
static STRING	to_string (const char *unichar, int pos, int total, bool natural)
static CHAR_FRAGMENT *	parse_from_string (const char *str)

Static Public Attributes
static const int	kMinLen = 6
static const int	kMaxLen = 3 + UNICHAR_LEN + 2
static const int	kMaxChunks = 5

Detailed Description

Definition at line 48 of file unicharset.h.

Member Function Documentation

equals() [1/2]

bool CHAR_FRAGMENT::equals ( const char *  other_unichar, int  other_pos, int  other_total  ) const

inline

Definition at line 85 of file unicharset.h.

                                                           {
    return (strcmp(this->unichar, other_unichar) == 0 &&
            this->pos == other_pos && this->total == other_total);
  }

equals() [2/2]

bool CHAR_FRAGMENT::equals ( const CHAR_FRAGMENT *  other ) const

inline

Definition at line 90 of file unicharset.h.

                                                       {
    return this->equals(other->get_unichar(),
                        other->get_pos(),
                        other->get_total());
  }

get_pos()

int CHAR_FRAGMENT::get_pos ( ) const

inline

Definition at line 71 of file unicharset.h.

{ return this->pos; }

get_total()

int CHAR_FRAGMENT::get_total ( ) const

inline

Definition at line 72 of file unicharset.h.

{ return this->total; }

get_unichar()

const char* CHAR_FRAGMENT::get_unichar ( ) const

inline

Definition at line 70 of file unicharset.h.

{ return this->unichar; }

is_beginning()

bool CHAR_FRAGMENT::is_beginning ( ) const

inline

Definition at line 105 of file unicharset.h.

{ return this->pos == 0; }

is_continuation_of()

bool CHAR_FRAGMENT::is_continuation_of ( const CHAR_FRAGMENT *  fragment ) const

inline

Definition at line 98 of file unicharset.h.

                                                                      {
    return (strcmp(this->unichar, fragment->get_unichar()) == 0 &&
            this->total == fragment->get_total() &&
            this->pos == fragment->get_pos() + 1);
  }

is_ending()

bool CHAR_FRAGMENT::is_ending ( ) const

inline

Definition at line 108 of file unicharset.h.

{ return this->pos == this->total-1; }

is_natural()

bool CHAR_FRAGMENT::is_natural ( ) const

inline

Definition at line 113 of file unicharset.h.

{ return natural; }

parse_from_string()

CHAR_FRAGMENT * CHAR_FRAGMENT::parse_from_string ( const char *  str )

static

Definition at line 1057 of file unicharset.cpp.

                                                                  {
  const char *ptr = string;
  int len = strlen(string);
  if (len < kMinLen || *ptr != kSeparator) {
    return nullptr;  // this string can not represent a fragment
  }
  ptr++;  // move to the next character
  int step = 0;
  while ((ptr + step) < (string + len) && *(ptr + step) != kSeparator) {
    step += UNICHAR::utf8_step(ptr + step);
  }
  if (step == 0 || step > UNICHAR_LEN) {
    return nullptr;  // no character for unichar or the character is too long
  }
  char unichar[UNICHAR_LEN + 1];
  strncpy(unichar, ptr, step);
  unichar[step] = '\0';  // null terminate unichar
  ptr += step;  // move to the next fragment separator
  int pos = 0;
  int total = 0;
  bool natural = false;
  char *end_ptr = nullptr;
  for (int i = 0; i < 2; i++) {
    if (ptr > string + len || *ptr != kSeparator) {
      if (i == 1 && *ptr == kNaturalFlag)
        natural = true;
      else
        return nullptr;  // Failed to parse fragment representation.
    }
    ptr++;  // move to the next character
    i == 0 ? pos = static_cast<int>(strtol(ptr, &end_ptr, 10))
      : total = static_cast<int>(strtol(ptr, &end_ptr, 10));
    ptr = end_ptr;
  }
  if (ptr != string + len) {
    return nullptr;  // malformed fragment representation
  }
  auto *fragment = new CHAR_FRAGMENT();
  fragment->set_all(unichar, pos, total, natural);
  return fragment;
}

set_all()

void CHAR_FRAGMENT::set_all ( const char *  unichar, int  pos, int  total, bool  natural  )

inline

Definition at line 58 of file unicharset.h.

                                                                             {
    set_unichar(unichar);
    set_pos(pos);
    set_total(total);
    set_natural(natural);
  }

set_natural()

void CHAR_FRAGMENT::set_natural ( bool  value )

inline

Definition at line 114 of file unicharset.h.

{ natural = value; }

set_pos()

void CHAR_FRAGMENT::set_pos ( int  p )

inline

Definition at line 68 of file unicharset.h.

{ this->pos = p; }

set_total()

void CHAR_FRAGMENT::set_total ( int  t )

inline

Definition at line 69 of file unicharset.h.

{ this->total = t; }

set_unichar()

void CHAR_FRAGMENT::set_unichar ( const char *  uch )

inline

Definition at line 64 of file unicharset.h.

                                           {
    strncpy(this->unichar, uch, sizeof(this->unichar));
    this->unichar[UNICHAR_LEN] = '\0';
  }

to_string() [1/2]

STRING CHAR_FRAGMENT::to_string ( ) const

inline

Definition at line 79 of file unicharset.h.

                           {
    return to_string(unichar, pos, total, natural);
  }

to_string() [2/2]

STRING CHAR_FRAGMENT::to_string ( const char *  unichar, int  pos, int  total, bool  natural  )

static

Definition at line 1044 of file unicharset.cpp.

                                              {
  if (total == 1) return STRING(unichar);
  STRING result = "";
  result += kSeparator;
  result += unichar;
  char buffer[kMaxLen];
  snprintf(buffer, kMaxLen, "%c%d%c%d", kSeparator, pos,
           natural ? kNaturalFlag : kSeparator, total);
  result += buffer;
  return result;
}

Member Data Documentation

kMaxChunks

const int CHAR_FRAGMENT::kMaxChunks = 5

static

Definition at line 55 of file unicharset.h.

kMaxLen

const int CHAR_FRAGMENT::kMaxLen = 3 + UNICHAR_LEN + 2

static

Definition at line 53 of file unicharset.h.

kMinLen

const int CHAR_FRAGMENT::kMinLen = 6

static

Definition at line 51 of file unicharset.h.

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

• /tesseract/src/ccutil/unicharset.h
• /tesseract/src/ccutil/unicharset.cpp