61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
// Scintilla source code edit control
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/** @file CharClassify.cxx
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** Character classifications used by Document and RESearch.
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**/
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// Copyright 2006 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <cstdlib>
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#include <cassert>
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#include <stdexcept>
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#include "CharacterType.h"
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#include "CharClassify.h"
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using namespace Scintilla::Internal;
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CharClassify::CharClassify() : charClass{} {
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SetDefaultCharClasses(true);
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}
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void CharClassify::SetDefaultCharClasses(bool includeWordClass) {
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// Initialize all char classes to default values
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for (int ch = 0; ch < maxChar; ch++) {
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if (ch == '\r' || ch == '\n')
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charClass[ch] = CharacterClass::newLine;
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else if (IsControl(ch) || ch == ' ')
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charClass[ch] = CharacterClass::space;
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else if (includeWordClass && (ch >= 0x80 || IsAlphaNumeric(ch) || ch == '_'))
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charClass[ch] = CharacterClass::word;
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else
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charClass[ch] = CharacterClass::punctuation;
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}
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}
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void CharClassify::SetCharClasses(const unsigned char *chars, CharacterClass newCharClass) {
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// Apply the newCharClass to the specified chars
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if (chars) {
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while (*chars) {
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charClass[*chars] = newCharClass;
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chars++;
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}
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}
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}
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int CharClassify::GetCharsOfClass(CharacterClass characterClass, unsigned char *buffer) const noexcept {
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// Get characters belonging to the given char class; return the number
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// of characters (if the buffer is NULL, don't write to it).
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int count = 0;
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for (int ch = maxChar - 1; ch >= 0; --ch) {
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if (charClass[ch] == characterClass) {
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++count;
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if (buffer) {
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*buffer = static_cast<unsigned char>(ch);
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buffer++;
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}
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}
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}
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return count;
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}
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