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author | Přemysl Eric Janouch <p@janouch.name> | 2023-07-07 12:25:14 +0200 |
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committer | Přemysl Eric Janouch <p@janouch.name> | 2023-07-07 16:43:52 +0200 |
commit | 2edc9c6fd10e34ca1da0d25d3ceb9b67a6b9c73c (patch) | |
tree | 83e3f3c9cd4b4200946ec2428672cecfd6d3d311 /tools/lxdrgen-cpp-posix.cpp | |
parent | f78f8a70f1753d687cae4a23659995b65e91fb3e (diff) | |
download | liberty-2edc9c6fd10e34ca1da0d25d3ceb9b67a6b9c73c.tar.gz liberty-2edc9c6fd10e34ca1da0d25d3ceb9b67a6b9c73c.tar.xz liberty-2edc9c6fd10e34ca1da0d25d3ceb9b67a6b9c73c.zip |
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.
Diffstat (limited to 'tools/lxdrgen-cpp-posix.cpp')
-rw-r--r-- | tools/lxdrgen-cpp-posix.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
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 <p@janouch.name> +// SPDX-License-Identifier: 0BSD +#include <iconv.h> + +#include <cstdint> +#include <string> + +// 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 |