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annotate mupdf-source/thirdparty/tesseract/src/training/unicharset/validate_indic.h @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
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children
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1 #ifndef TESSERACT_TRAINING_VALIDATE_INDIC_H_
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2 #define TESSERACT_TRAINING_VALIDATE_INDIC_H_
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4 #include "validator.h"
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6 namespace tesseract {
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8 // Subclass of Validator that validates and segments Indic scripts in the
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9 // unicode range 0x900-0xdff (Devanagari-Sinhala).
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10 class ValidateIndic : public Validator {
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11 public:
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12 ValidateIndic(ViramaScript script, bool report_errors) : Validator(script, report_errors) {}
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13 ~ValidateIndic() override = default;
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15 protected:
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16 // Returns whether codes matches the pattern for an Indic Grapheme.
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17 // Consumes the next Grapheme in codes_[codes_used_++...] and copies it to
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18 // parts_ and output_. Returns true if a valid Grapheme was consumed,
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19 // otherwise does not increment codes_used_.
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20 bool ConsumeGraphemeIfValid() override;
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21 // Returns the CharClass corresponding to the given Unicode ch.
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22 Validator::CharClass UnicodeToCharClass(char32 ch) const override;
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24 private:
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25 // Helper consumes/copies a virama and any associated post-virama joiners.
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26 bool ConsumeViramaIfValid(IndicPair joiner, bool post_matra);
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27 // Helper consumes/copies a series of consonants separated by viramas while
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28 // valid, but not any vowel or other modifiers.
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29 bool ConsumeConsonantHeadIfValid();
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30 // Helper consumes/copies a tail part of a consonant, comprising optional
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31 // matra/piece, vowel modifier, vedic mark, terminating virama.
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32 bool ConsumeConsonantTailIfValid();
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33 // Helper consumes/copies a vowel and optional modifiers.
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34 bool ConsumeVowelIfValid();
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36 // Some special unicodes used only for Indic processing.
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37 static const char32 kYayana = 0xdba; // Sinhala Ya
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38 static const char32 kRayana = 0xdbb; // Sinhala Ra
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39 };
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41 } // namespace tesseract
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43 #endif // TESSERACT_TRAINING_VALIDATE_INDIC_H_