CharacterCategory.h

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// Scintilla source code edit control
/** @file CharacterCategory.h
 ** Returns the Unicode general category of a character.
 **/
// Copyright 2013 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
 
#ifndef CHARACTERCATEGORY_H
#define CHARACTERCATEGORY_H
 
namespace Scintilla {
 
enum CharacterCategory {
    ccLu, ccLl, ccLt, ccLm, ccLo,
    ccMn, ccMc, ccMe,
    ccNd, ccNl, ccNo,
    ccPc, ccPd, ccPs, ccPe, ccPi, ccPf, ccPo,
    ccSm, ccSc, ccSk, ccSo,
    ccZs, ccZl, ccZp,
    ccCc, ccCf, ccCs, ccCo, ccCn
};
 
CharacterCategory CategoriseCharacter(int character);
 
// Common definitions of allowable characters in identifiers from UAX #31.
bool IsIdStart(int character);
bool IsIdContinue(int character);
bool IsXidStart(int character);
bool IsXidContinue(int character);
 
class CharacterCategoryMap {
private:
    std::vector<unsigned char> dense;
public:
    CharacterCategoryMap();
    CharacterCategory CategoryFor(int character) const {
        if (static_cast<size_t>(character) < dense.size()) {
            return static_cast<CharacterCategory>(dense[character]);
        } else {
            // binary search through ranges
            return CategoriseCharacter(character);
        }
    }
    int Size() const noexcept;
    void Optimize(int countCharacters);
};
 
}
 
#endif