68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
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// lxdrgen-cpp-posix.cpp: POSIX support code for lxdrgen-cpp.awk.
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//
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// Copyright (c) 2023, Přemysl Eric Janouch <p@janouch.name>
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// SPDX-License-Identifier: 0BSD
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#include <iconv.h>
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#include <cstdint>
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#include <string>
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// Various BSD derivatives may have a problem here.
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// Linux defines __STDC_ISO_10646__, but also supports "WCHAR_T".
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#ifdef APPLE
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#define ICONV_WCHAR "UTF-32"
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#else
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#define ICONV_WCHAR "WCHAR_T"
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#endif
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namespace LibertyXDR {
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bool utf8_to_wstring(const uint8_t *utf8, size_t length, std::wstring &wide) {
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iconv_t conv = iconv_open(ICONV_WCHAR, "UTF-8");
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if (conv == (iconv_t) -1)
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return false;
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wchar_t buffer[1024] = {};
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char *start = (char *) buffer, *out = start, *in = (char *) utf8;
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size_t available = sizeof buffer;
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wide.clear();
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while (iconv(conv, &in, &length, &out, &available) == (size_t) -1) {
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if (errno != E2BIG) {
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iconv_close(conv);
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return false;
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}
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wide.append(buffer, (out - start) / sizeof *buffer);
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out = start;
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available = sizeof buffer;
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}
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wide.append(buffer, (out - start) / sizeof *buffer);
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iconv_close(conv);
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return true;
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}
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bool wstring_to_utf8(const std::wstring &wide, std::string &utf8) {
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iconv_t conv = iconv_open("UTF-8", ICONV_WCHAR);
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if (conv == (iconv_t) -1)
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return false;
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char buffer[1024] = {}, *out = buffer, *in = (char *) wide.data();
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size_t available = sizeof buffer, length = wide.size() * sizeof wide[0];
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utf8.clear();
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while (iconv(conv, &in, &length, &out, &available) == (size_t) -1) {
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if (errno != E2BIG) {
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iconv_close(conv);
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return false;
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}
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utf8.append(buffer, out - buffer);
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out = buffer;
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available = sizeof buffer;
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}
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utf8.append(buffer, out - buffer);
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iconv_close(conv);
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return true;
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}
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} // namespace LibertyXDR
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