--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/tesseract/src/training/unicharset/validate_indic.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,43 @@
+#ifndef TESSERACT_TRAINING_VALIDATE_INDIC_H_
+#define TESSERACT_TRAINING_VALIDATE_INDIC_H_
+
+#include "validator.h"
+
+namespace tesseract {
+
+// Subclass of Validator that validates and segments Indic scripts in the
+// unicode range 0x900-0xdff (Devanagari-Sinhala).
+class ValidateIndic : public Validator {
+public:
+  ValidateIndic(ViramaScript script, bool report_errors) : Validator(script, report_errors) {}
+  ~ValidateIndic() override = default;
+
+protected:
+  // Returns whether codes matches the pattern for an Indic Grapheme.
+  // Consumes the next Grapheme in codes_[codes_used_++...] and copies it to
+  // parts_ and output_. Returns true if a valid Grapheme was consumed,
+  // otherwise does not increment codes_used_.
+  bool ConsumeGraphemeIfValid() override;
+  // Returns the CharClass corresponding to the given Unicode ch.
+  Validator::CharClass UnicodeToCharClass(char32 ch) const override;
+
+private:
+  // Helper consumes/copies a virama and any associated post-virama joiners.
+  bool ConsumeViramaIfValid(IndicPair joiner, bool post_matra);
+  // Helper consumes/copies a series of consonants separated by viramas while
+  // valid, but not any vowel or other modifiers.
+  bool ConsumeConsonantHeadIfValid();
+  // Helper consumes/copies a tail part of a consonant, comprising optional
+  // matra/piece, vowel modifier, vedic mark, terminating virama.
+  bool ConsumeConsonantTailIfValid();
+  // Helper consumes/copies a vowel and optional modifiers.
+  bool ConsumeVowelIfValid();
+
+  // Some special unicodes used only for Indic processing.
+  static const char32 kYayana = 0xdba; // Sinhala Ya
+  static const char32 kRayana = 0xdbb; // Sinhala Ra
+};
+
+} // namespace tesseract
+
+#endif // TESSERACT_TRAINING_VALIDATE_INDIC_H_