84 строки
2.3 KiB
C++
84 строки
2.3 KiB
C++
// Scintilla source code edit control
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// Converter.h - Encapsulation of iconv
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// Copyright 2004 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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#ifndef CONVERTER_H
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#define CONVERTER_H
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#ifdef SCI_NAMESPACE
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namespace Scintilla {
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#endif
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typedef GIConv ConverterHandle;
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const ConverterHandle iconvhBad = (ConverterHandle)(-1);
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// Since various versions of iconv can not agree on whether the src argument
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// is char ** or const char ** provide a templatised adaptor.
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template<typename T>
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size_t iconv_adaptor(size_t(*f_iconv)(ConverterHandle, T, size_t *, char **, size_t *),
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ConverterHandle cd, char** src, size_t *srcleft,
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char **dst, size_t *dstleft) {
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return f_iconv(cd, (T)src, srcleft, dst, dstleft);
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}
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/**
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* Encapsulate iconv safely and avoid iconv_adaptor complexity in client code.
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*/
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class Converter {
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ConverterHandle iconvh;
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void OpenHandle(const char *fullDestination, const char *charSetSource) {
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iconvh = g_iconv_open(fullDestination, charSetSource);
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}
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bool Succeeded() const {
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return iconvh != iconvhBad;
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}
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public:
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Converter() {
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iconvh = iconvhBad;
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}
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Converter(const char *charSetDestination, const char *charSetSource, bool transliterations) {
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iconvh = iconvhBad;
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Open(charSetDestination, charSetSource, transliterations);
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}
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~Converter() {
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Close();
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}
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operator bool() const {
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return Succeeded();
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}
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void Open(const char *charSetDestination, const char *charSetSource, bool transliterations=true) {
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Close();
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if (*charSetSource) {
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// Try allowing approximate transliterations
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if (transliterations) {
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char fullDest[200];
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g_strlcpy(fullDest, charSetDestination, sizeof(fullDest));
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g_strlcat(fullDest, "//TRANSLIT", sizeof(fullDest));
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OpenHandle(fullDest, charSetSource);
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}
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if (!Succeeded()) {
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// Transliterations failed so try basic name
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OpenHandle(charSetDestination, charSetSource);
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}
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}
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}
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void Close() {
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if (Succeeded()) {
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g_iconv_close(iconvh);
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iconvh = iconvhBad;
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}
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}
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size_t Convert(char** src, size_t *srcleft, char **dst, size_t *dstleft) const {
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if (!Succeeded()) {
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return (size_t)(-1);
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} else {
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return iconv_adaptor(g_iconv, iconvh, src, srcleft, dst, dstleft);
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}
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}
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};
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#ifdef SCI_NAMESPACE
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}
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#endif
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#endif
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