scintilla/CharacterSet.h

   1 // Scintilla source code edit control
   2 /** @file CharacterSet.h
   3  ** Encapsulates a set of characters. Used to test if a character is within a set.
   4  **/
   5 // Copyright 2007 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 class CharacterSet {
   9         int size;
  10         bool valueAfter;
  11         bool *bset;
  12 public:
  13         enum setBase {
  14                 setNone=0,
  15                 setLower=1,
  16                 setUpper=2,
  17                 setDigits=4,
  18                 setAlpha=setLower|setUpper,
  19                 setAlphaNum=setAlpha|setDigits
  20         };
  21         CharacterSet(setBase base=setNone, const char *initialSet="", int size_=0x80, bool valueAfter_=false) {
  22                 size = size_;
  23                 valueAfter = valueAfter_;
  24                 bset = new bool[size];
  25                 for (int i=0; i < size; i++) {
  26                         bset[i] = false;
  27                 }
  28                 AddString(initialSet);
  29                 if (base & setLower)
  30                         AddString("abcdefghijklmnopqrstuvwxyz");
  31                 if (base & setUpper)
  32                         AddString("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
  33                 if (base & setDigits)
  34                         AddString("0123456789");
  35         }
  36         ~CharacterSet() {
  37                 delete []bset;
  38                 bset = 0;
  39                 size = 0;
  40         }
  41         void Add(int val) {
  42                 PLATFORM_ASSERT(val >= 0);
  43                 PLATFORM_ASSERT(val < size);
  44                 bset[val] = true;
  45         }
  46         void AddString(const char *CharacterSet) {
  47                 for (const char *cp=CharacterSet; *cp; cp++) {
  48                         int val = static_cast<unsigned char>(*cp);
  49                         PLATFORM_ASSERT(val >= 0);
  50                         PLATFORM_ASSERT(val < size);
  51                         bset[val] = true;
  52                 }
  53         }
  54         bool Contains(int val) const {
  55                 PLATFORM_ASSERT(val >= 0);
  56                 if (val < 0) return false;
  57                 return (val < size) ? bset[val] : valueAfter;
  58         }
  59 };