Method convert

src/common/isc_file.cpp:1632–1650

	}

	void convert(AbstractString& str)
	{
		MutexLockGuard g(mtx, FB_FUNCTION);

		const size_t outlength = str.length() * 4;
		size_t outsize = outlength;
		char* outbuf = toBuf.getBuffer(outsize);
		size_t insize = str.length();
		char* inbuf = str.begin();
		if (iconv(ic, &inbuf, &insize, &outbuf, &outsize) == (size_t) -1)
		{
			(Arg::Gds(isc_bad_conn_str) <<
			 Arg::Gds(isc_transliteration_failed) <<
			 Arg::Unix(errno)).raise();
		}

		outsize = outlength - outsize;
		memcpy(str.getBuffer(outsize), toBuf.begin(), outsize);
	}

private:
	string charmapName(const char* name)