From 2edc9c6fd10e34ca1da0d25d3ceb9b67a6b9c73c Mon Sep 17 00:00:00 2001 From: Přemysl Eric Janouch Date: Fri, 7 Jul 2023 12:25:14 +0200 Subject: Add a C++ backend for LibertyXDR Also change the C backend so that it also de/serializes unions without any other fields besides the tag. --- tools/lxdrgen-cpp-posix.cpp | 67 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 tools/lxdrgen-cpp-posix.cpp (limited to 'tools/lxdrgen-cpp-posix.cpp') diff --git a/tools/lxdrgen-cpp-posix.cpp b/tools/lxdrgen-cpp-posix.cpp new file mode 100644 index 0000000..f3b3d2b --- /dev/null +++ b/tools/lxdrgen-cpp-posix.cpp @@ -0,0 +1,67 @@ +// lxdrgen-cpp-posix.cpp: POSIX support code for lxdrgen-cpp.awk. +// +// Copyright (c) 2023, Přemysl Eric Janouch +// SPDX-License-Identifier: 0BSD +#include + +#include +#include + +// Various BSD derivatives may have a problem here. +// Linux defines __STDC_ISO_10646__, but also supports "WCHAR_T". +#ifdef APPLE +#define ICONV_WCHAR "UTF-32" +#else +#define ICONV_WCHAR "WCHAR_T" +#endif + +namespace LibertyXDR { + +bool utf8_to_wstring(const uint8_t *utf8, size_t length, std::wstring &wide) { + iconv_t conv = iconv_open(ICONV_WCHAR, "UTF-8"); + if (conv == (iconv_t) -1) + return false; + + wchar_t buffer[1024] = {}; + char *start = (char *) buffer, *out = start, *in = (char *) utf8; + size_t available = sizeof buffer; + wide.clear(); + while (iconv(conv, &in, &length, &out, &available) == (size_t) -1) { + if (errno != E2BIG) { + iconv_close(conv); + return false; + } + + wide.append(buffer, (out - start) / sizeof *buffer); + out = start; + available = sizeof buffer; + } + wide.append(buffer, (out - start) / sizeof *buffer); + iconv_close(conv); + return true; +} + +bool wstring_to_utf8(const std::wstring &wide, std::string &utf8) { + iconv_t conv = iconv_open("UTF-8", ICONV_WCHAR); + if (conv == (iconv_t) -1) + return false; + + char buffer[1024] = {}, *out = buffer, *in = (char *) wide.data(); + size_t available = sizeof buffer, length = wide.size() * sizeof wide[0]; + utf8.clear(); + while (iconv(conv, &in, &length, &out, &available) == (size_t) -1) { + if (errno != E2BIG) { + iconv_close(conv); + return false; + } + + utf8.append(buffer, out - buffer); + out = buffer; + available = sizeof buffer; + } + utf8.append(buffer, out - buffer); + iconv_close(conv); + return true; +} + +} // namespace LibertyXDR -- cgit v1.2.3-54-g00ecf