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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
namespace Scintilla {
const GIConv iconvhBad = (GIConv)(-1);
const gsize sizeFailure = static_cast<gsize>(-1);
/**
* Encapsulate g_iconv safely.
*/
class Converter {
GIConv iconvh = iconvhBad;
void OpenHandle(const char *fullDestination, const char *charSetSource) noexcept {
iconvh = g_iconv_open(fullDestination, charSetSource);
}
bool Succeeded() const noexcept {
return iconvh != iconvhBad;
}
public:
Converter() noexcept = default;
Converter(const char *charSetDestination, const char *charSetSource, bool transliterations) {
Open(charSetDestination, charSetSource, transliterations);
}
// Deleted so Converter objects can not be copied.
Converter(const Converter &) = delete;
Converter(Converter &&) = delete;
Converter &operator=(const Converter &) = delete;
Converter &operator=(Converter &&) = delete;
~Converter() {
Close();
}
operator bool() const noexcept {
return Succeeded();
}
void Open(const char *charSetDestination, const char *charSetSource, bool transliterations) {
Close();
if (*charSetSource) {
// Try allowing approximate transliterations
if (transliterations) {
std::string fullDest(charSetDestination);
fullDest.append("//TRANSLIT");
OpenHandle(fullDest.c_str(), charSetSource);
}
if (!Succeeded()) {
// Transliterations failed so try basic name
OpenHandle(charSetDestination, charSetSource);
}
}
}
void Close() noexcept {
if (Succeeded()) {
g_iconv_close(iconvh);
iconvh = iconvhBad;
}
}
gsize Convert(char **src, gsize *srcleft, char **dst, gsize *dstleft) const noexcept {
if (!Succeeded()) {
return sizeFailure;
} else {
return g_iconv(iconvh, src, srcleft, dst, dstleft);
}
}
};
}
#endif
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