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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.
#ifndef CONVERTER_H
#define CONVERTER_H
#ifdef SCI_NAMESPACE
namespace Scintilla {
#endif
typedef GIConv ConverterHandle;
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;
void OpenHandle(const char *fullDestination, const char *charSetSource) {
iconvh = g_iconv_open(fullDestination, charSetSource);
}
bool Succeeded() const {
return iconvh != iconvhBad;
}
public:
Converter() {
iconvh = iconvhBad;
}
Converter(const char *charSetDestination, const char *charSetSource, bool transliterations) {
iconvh = iconvhBad;
Open(charSetDestination, charSetSource, transliterations);
}
~Converter() {
Close();
}
operator bool() const {
return Succeeded();
}
void Open(const char *charSetDestination, const char *charSetSource, bool transliterations=true) {
Close();
if (*charSetSource) {
// Try allowing approximate transliterations
if (transliterations) {
char fullDest[200];
strcpy(fullDest, charSetDestination);
strcat(fullDest, "//TRANSLIT");
OpenHandle(fullDest, charSetSource);
}
if (!Succeeded()) {
// Transliterations failed so try basic name
OpenHandle(charSetDestination, charSetSource);
}
}
}
void Close() {
if (Succeeded()) {
g_iconv_close(iconvh);
iconvh = iconvhBad;
}
}
size_t Convert(char** src, size_t *srcleft, char **dst, size_t *dstleft) const {
if (!Succeeded()) {
return (size_t)(-1);
} else {
return iconv_adaptor(g_iconv, iconvh, src, srcleft, dst, dstleft);
}
}
};
#ifdef SCI_NAMESPACE
}
#endif
#endif
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