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9ceb0c6430
Replace DOS line endings (CRLF) by standard (LF only). Signed-off-by: Stefan Weil <sw@weilnetz.de>
48 lines
1.8 KiB
C++
48 lines
1.8 KiB
C++
#ifndef TESSERACT_TRAINING_VALIDATE_MYANMAR_H_
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#define TESSERACT_TRAINING_VALIDATE_MYANMAR_H_
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#include "validator.h"
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namespace tesseract {
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// Subclass of Validator that validates and segments Myanmar.
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class ValidateMyanmar : public Validator {
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public:
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ValidateMyanmar(ViramaScript script, bool report_errors)
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: Validator(script, report_errors) {}
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~ValidateMyanmar() {}
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protected:
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// Returns whether codes matches the pattern for a Myanmar Grapheme.
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// Consumes the next Grapheme in codes_[codes_used_++...] and copies it to
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// parts_ and output_. Returns true if a valid Grapheme was consumed,
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// otherwise does not increment codes_used_.
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bool ConsumeGraphemeIfValid() override;
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// Returns the CharClass corresponding to the given Unicode ch.
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Validator::CharClass UnicodeToCharClass(char32 ch) const override;
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private:
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// Helper consumes/copies a virama and any subscript consonant.
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// Returns true if the end of input is reached.
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bool ConsumeSubscriptIfPresent();
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// Helper consumes/copies a series of optional signs.
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// Returns true if the end of input is reached.
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bool ConsumeOptionalSignsIfPresent();
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// Returns true if the unicode is a Myanmar "letter" including consonants
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// and independent vowels. Although table 16-3 distinguishes between some
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// base consonants and vowels, the extensions make no such distinction, so we
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// put them all into a single bucket.
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static bool IsMyanmarLetter(char32 ch);
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// Returns true if ch is a Myanmar digit or other symbol that does not take
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// part in being a syllable.
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static bool IsMyanmarOther(char32 ch);
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// Some special unicodes used only for Myanmar processing.
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static const char32 kMyanmarAsat = 0x103a;
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static const char32 kMyanmarMedialYa = 0x103b;
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};
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} // namespace tesseract
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#endif // TESSERACT_TRAINING_VALIDATE_MYANMAR_H_
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