1 | // Scintilla source code edit control |
---|---|
2 | /** @file CharClassify.cxx |
3 | ** Character classifications used by Document and RESearch. |
4 | **/ |
5 | // Copyright 2006 by Neil Hodgson <neilh@scintilla.org> |
6 | // The License.txt file describes the conditions under which this software may be distributed. |
7 | |
8 | #include <cstdlib> |
9 | #include <cassert> |
10 | |
11 | #include <stdexcept> |
12 | |
13 | #include "CharacterType.h" |
14 | #include "CharClassify.h" |
15 | |
16 | using namespace Scintilla::Internal; |
17 | |
18 | CharClassify::CharClassify() : charClass{} { |
19 | SetDefaultCharClasses(true); |
20 | } |
21 | |
22 | void CharClassify::SetDefaultCharClasses(bool includeWordClass) { |
23 | // Initialize all char classes to default values |
24 | for (int ch = 0; ch < maxChar; ch++) { |
25 | if (ch == '\r' || ch == '\n') |
26 | charClass[ch] = CharacterClass::newLine; |
27 | else if (IsControl(ch) || ch == ' ') |
28 | charClass[ch] = CharacterClass::space; |
29 | else if (includeWordClass && (ch >= 0x80 || IsAlphaNumeric(ch) || ch == '_')) |
30 | charClass[ch] = CharacterClass::word; |
31 | else |
32 | charClass[ch] = CharacterClass::punctuation; |
33 | } |
34 | } |
35 | |
36 | void CharClassify::SetCharClasses(const unsigned char *chars, CharacterClass newCharClass) { |
37 | // Apply the newCharClass to the specified chars |
38 | if (chars) { |
39 | while (*chars) { |
40 | charClass[*chars] = newCharClass; |
41 | chars++; |
42 | } |
43 | } |
44 | } |
45 | |
46 | int CharClassify::GetCharsOfClass(CharacterClass characterClass, unsigned char *buffer) const noexcept { |
47 | // Get characters belonging to the given char class; return the number |
48 | // of characters (if the buffer is NULL, don't write to it). |
49 | int count = 0; |
50 | for (int ch = maxChar - 1; ch >= 0; --ch) { |
51 | if (charClass[ch] == characterClass) { |
52 | ++count; |
53 | if (buffer) { |
54 | *buffer = static_cast<unsigned char>(ch); |
55 | buffer++; |
56 | } |
57 | } |
58 | } |
59 | return count; |
60 | } |
61 |