1 files changed, 59 insertions, 0 deletions
diff --git a/lexlib/CharacterSet.h b/lexlib/CharacterSet.h
new file mode 100644
index 000000000..9b8869635
--- /dev/null
+++ b/lexlib/CharacterSet.h
@@ -0,0 +1,59 @@
+// Scintilla source code edit control
+/** @file CharacterSet.h
+ ** Encapsulates a set of characters. Used to test if a character is within a set.
+ **/
+// Copyright 2007 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+class CharacterSet {
+	int size;
+	bool valueAfter;
+	bool *bset;
+public:
+	enum setBase {
+		setNone=0,
+		setLower=1,
+		setUpper=2,
+		setDigits=4,
+		setAlpha=setLower|setUpper,
+		setAlphaNum=setAlpha|setDigits
+	};
+	CharacterSet(setBase base=setNone, const char *initialSet="", int size_=0x80, bool valueAfter_=false) {
+		size = size_;
+		valueAfter = valueAfter_;
+		bset = new bool[size];
+		for (int i=0; i < size; i++) {
+			bset[i] = false;
+		}
+		AddString(initialSet);
+		if (base & setLower)
+			AddString("abcdefghijklmnopqrstuvwxyz");
+		if (base & setUpper)
+			AddString("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
+		if (base & setDigits)
+			AddString("0123456789");
+	}
+	~CharacterSet() {
+		delete []bset;
+		bset = 0;
+		size = 0;
+	}
+	void Add(int val) {
+		PLATFORM_ASSERT(val >= 0);
+		PLATFORM_ASSERT(val < size);
+		bset[val] = true;
+	}
+	void AddString(const char *CharacterSet) {
+		for (const char *cp=CharacterSet; *cp; cp++) {
+			int val = static_cast<unsigned char>(*cp);
+			PLATFORM_ASSERT(val >= 0);
+			PLATFORM_ASSERT(val < size);
+			bset[val] = true;
+		}
+	}
+	bool Contains(int val) const {
+		PLATFORM_ASSERT(val >= 0);
+		if (val < 0) return false;
+		return (val < size) ? bset[val] : valueAfter;
+	}
+};