1 files changed, 53 insertions, 0 deletions
diff --git a/gtk/Converter.h b/gtk/Converter.h
new file mode 100644
index 000000000..c408c220f
--- /dev/null
+++ b/gtk/Converter.h
@@ -0,0 +1,53 @@
+// Scintilla source code edit control
+// Converter.h - Encapsulation of iconv
+// Copyright 2004 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <iconv.h>
+const iconv_t iconvhBad = (iconv_t)(-1);
+// Since various versions of iconv can not agree on whether the src argument
+// is char ** or const char ** provide a templatised adaptor.
+template<typename T>
+size_t iconv_adaptor(size_t(*f_iconv)(iconv_t, T, size_t *, char **, size_t *),
+		iconv_t cd, char** src, size_t *srcleft,
+		char **dst, size_t *dstleft) {
+	return f_iconv(cd, (T)src, srcleft, dst, dstleft);
+}
+/**
+ * Encapsulate iconv safely and avoid iconv_adaptor complexity in client code.
+ */
+class Converter {
+	iconv_t iconvh;
+public:
+	Converter() {
+		iconvh = iconvhBad;
+	}
+	Converter(const char *charSetDestination, const char *charSetSource) {
+		iconvh = iconv_open(charSetDestination, charSetSource);
+	}
+	~Converter() {
+		Close();
+	}
+	operator bool() const {
+		return iconvh != iconvhBad;
+	}
+	void Open(const char *charSetDestination, const char *charSetSource) {
+		Close();
+		if (*charSetSource) {
+			iconvh = iconv_open(charSetDestination, charSetSource);
+		}
+	}
+	void Close() {
+		if (iconvh != iconvhBad) {
+			iconv_close(iconvh);
+			iconvh = iconvhBad;
+		}
+	}
+	size_t Convert(char** src, size_t *srcleft, char **dst, size_t *dstleft) const {
+		if (iconvh == iconvhBad) {
+			return (size_t)(-1);
+		} else {
+			return iconv_adaptor(iconv, iconvh, src, srcleft, dst, dstleft);
+		}
+	}
+};