1 files changed, 52 insertions, 0 deletions
diff --git a/src/CharacterSet.cxx b/src/CharacterSet.cxx
new file mode 100644
index 000000000..b934c2dd4
--- /dev/null
+++ b/src/CharacterSet.cxx
@@ -0,0 +1,52 @@
+// Scintilla source code edit control
+/** @file CharacterSet.cxx
+ ** Simple case functions for ASCII.
+ ** Lexer infrastructure.
+ **/
+// Copyright 1998-2010 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <cstdlib>
+#include <cassert>
+
+#include "CharacterSet.h"
+
+using namespace Scintilla;
+
+namespace Scintilla {
+
+int CompareCaseInsensitive(const char *a, const char *b) noexcept {
+	while (*a && *b) {
+		if (*a != *b) {
+			const char upperA = MakeUpperCase(*a);
+			const char upperB = MakeUpperCase(*b);
+			if (upperA != upperB)
+				return upperA - upperB;
+		}
+		a++;
+		b++;
+	}
+	// Either *a or *b is nul
+	return *a - *b;
+}
+
+int CompareNCaseInsensitive(const char *a, const char *b, size_t len) noexcept {
+	while (*a && *b && len) {
+		if (*a != *b) {
+			const char upperA = MakeUpperCase(*a);
+			const char upperB = MakeUpperCase(*b);
+			if (upperA != upperB)
+				return upperA - upperB;
+		}
+		a++;
+		b++;
+		len--;
+	}
+	if (len == 0)
+		return 0;
+	else
+		// Either *a or *b is nul
+		return *a - *b;
+}
+
+}