mirror of
https://github.com/matrix-construct/construct
synced 2024-11-01 03:18:54 +01:00
103 lines
2.1 KiB
C++
103 lines
2.1 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <cxxabi.h>
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namespace ircd
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{
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static thread_local char
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demangle_outbuf[8192],
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demangle_symbuf[8192];
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}
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std::string
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ircd::demangle(const char *const &symbol)
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{
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const string_view demangled
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{
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demangle(demangle_outbuf, symbol)
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};
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return std::string(demangled);
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}
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std::string
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ircd::demangle(const string_view &symbol)
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{
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const string_view demangled
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{
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demangle(demangle_outbuf, symbol)
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};
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return std::string(demangled);
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}
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ircd::string_view
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ircd::demangle(const mutable_buffer &out,
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const string_view &symbol_)
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{
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assert(size(symbol_) < 4096);
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const string_view symbol
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{
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demangle_symbuf, strlcpy(demangle_symbuf, symbol_)
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};
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return demangle(out, symbol.data());
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}
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ircd::string_view
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ircd::demangle(const mutable_buffer &out,
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const char *const &symbol)
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{
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int status(0);
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size_t len(size(out));
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const char *const ret
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{
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abi::__cxa_demangle(symbol, data(out), &len, &status)
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};
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switch(status)
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{
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case 0: return string_view
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{
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ret, strnlen(ret, len)
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};
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case -1: throw demangle_error
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{
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"Demangle failed -1: memory allocation failure"
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};
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/*
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case -2: throw not_mangled
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{
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"Demangle failed -2: mangled name '%s' is not valid", symbol
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};
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*/
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// No real use case within IRCd for throwing not_mangled which may
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// happen for extern "C" related; instead simply copying the input
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// to the output (as per expectation) is much better behavior.
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case -2: return string_view
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{
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symbol, strlcpy(out, symbol)
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};
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case -3: throw demangle_error
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{
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"Demangle failed -3: invalid argument"
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};
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default: throw demangle_error
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{
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"Demangle failed %d: unknown error", status
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};
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}
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}
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