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// 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>
#if GTK_MAJOR_VERSION >= 2
typedef GIConv ConverterHandle;
#else
typedef iconv_t ConverterHandle;
#endif
const ConverterHandle iconvhBad = (ConverterHandle)(-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)(ConverterHandle, T, size_t *, char **, size_t *),
ConverterHandle 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 {
ConverterHandle iconvh;
public:
Converter() {
iconvh = iconvhBad;
}
Converter(const char *charSetDestination, const char *charSetSource) {
iconvh = iconvhBad;
Open(charSetDestination, charSetSource);
}
~Converter() {
Close();
}
operator bool() const {
return iconvh != iconvhBad;
}
void Open(const char *charSetDestination, const char *charSetSource) {
Close();
if (*charSetSource) {
#if GTK_MAJOR_VERSION >= 2
iconvh = g_iconv_open(charSetDestination, charSetSource);
#else
iconvh = iconv_open(charSetDestination, charSetSource);
#endif
}
}
void Close() {
if (iconvh != iconvhBad) {
#if GTK_MAJOR_VERSION >= 2
g_iconv_close(iconvh);
#else
iconv_close(iconvh);
#endif
iconvh = iconvhBad;
}
}
size_t Convert(char** src, size_t *srcleft, char **dst, size_t *dstleft) const {
if (iconvh == iconvhBad) {
return (size_t)(-1);
} else {
#if GTK_MAJOR_VERSION >= 2
return iconv_adaptor(g_iconv, iconvh, src, srcleft, dst, dstleft);
#else
return iconv_adaptor(iconv, iconvh, src, srcleft, dst, dstleft);
#endif
}
}
};
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