ext/scintilla/lexlib/CharacterSet.cxx

   1 // Scintilla source code edit control
   2 /** @file CharacterSet.cxx
   3  ** Simple case functions for ASCII.
   4  ** Lexer infrastructure.
   5  **/
   6 // Copyright 1998-2010 by Neil Hodgson <neilh@scintilla.org>
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #include <cstdlib>
  10 #include <cassert>
  11
  12 #include "CharacterSet.h"
  13
  14 using namespace Scintilla;
  15
  16 namespace Scintilla {
  17
  18 int CompareCaseInsensitive(const char *a, const char *b) {
  19         while (*a && *b) {
  20                 if (*a != *b) {
  21                         const char upperA = static_cast<char>(MakeUpperCase(*a));
  22                         const char upperB = static_cast<char>(MakeUpperCase(*b));
  23                         if (upperA != upperB)
  24                                 return upperA - upperB;
  25                 }
  26                 a++;
  27                 b++;
  28         }
  29         // Either *a or *b is nul
  30         return *a - *b;
  31 }
  32
  33 int CompareNCaseInsensitive(const char *a, const char *b, size_t len) {
  34         while (*a && *b && len) {
  35                 if (*a != *b) {
  36                         const char upperA = static_cast<char>(MakeUpperCase(*a));
  37                         const char upperB = static_cast<char>(MakeUpperCase(*b));
  38                         if (upperA != upperB)
  39                                 return upperA - upperB;
  40                 }
  41                 a++;
  42                 b++;
  43                 len--;
  44         }
  45         if (len == 0)
  46                 return 0;
  47         else
  48                 // Either *a or *b is nul
  49                 return *a - *b;
  50 }
  51
  52 }