scintilla/CharClassify.cxx

   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 <stdlib.h>
   9 #include <ctype.h>
  10
  11 #include "CharClassify.h"
  12
  13 // Shut up annoying Visual C++ warnings:
  14 #ifdef _MSC_VER
  15 #pragma warning(disable: 4514)
  16 #endif
  17
  18 CharClassify::CharClassify() {
  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 < 256; ch++) {
  25                 if (ch == '\r' || ch == '\n')
  26                         charClass[ch] = ccNewLine;
  27                 else if (ch < 0x20 || ch == ' ')
  28                         charClass[ch] = ccSpace;
  29                 else if (includeWordClass && (ch >= 0x80 || isalnum(ch) || ch == '_'))
  30                         charClass[ch] = ccWord;
  31                 else
  32                         charClass[ch] = ccPunctuation;
  33         }
  34 }
  35
  36 void CharClassify::SetCharClasses(const unsigned char *chars, cc newCharClass) {
  37         // Apply the newCharClass to the specifed chars
  38         if (chars) {
  39                 while (*chars) {
  40                         charClass[*chars] = static_cast<unsigned char>(newCharClass);
  41                         chars++;
  42                 }
  43         }
  44 }
  45
  46 int CompareCaseInsensitive(const char *a, const char *b) {
  47         while (*a && *b) {
  48                 if (*a != *b) {
  49                         char upperA = MakeUpperCase(*a);
  50                         char upperB = MakeUpperCase(*b);
  51                         if (upperA != upperB)
  52                                 return upperA - upperB;
  53                 }
  54                 a++;
  55                 b++;
  56         }
  57         // Either *a or *b is nul
  58         return *a - *b;
  59 }
  60
  61 int CompareNCaseInsensitive(const char *a, const char *b, size_t len) {
  62         while (*a && *b && len) {
  63                 if (*a != *b) {
  64                         char upperA = MakeUpperCase(*a);
  65                         char upperB = MakeUpperCase(*b);
  66                         if (upperA != upperB)
  67                                 return upperA - upperB;
  68                 }
  69                 a++;
  70                 b++;
  71                 len--;
  72         }
  73         if (len == 0)
  74                 return 0;
  75         else
  76                 // Either *a or *b is nul
  77                 return *a - *b;
  78 }