104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
//===- Strings.cpp -------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lld/Common/Strings.h"
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/Demangle/Demangle.h"
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#include "llvm/Support/GlobPattern.h"
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#include <algorithm>
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#include <mutex>
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#include <vector>
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using namespace llvm;
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using namespace lld;
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// Returns the demangled C++ symbol name for Name.
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Optional<std::string> lld::demangleItanium(StringRef name) {
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// itaniumDemangle can be used to demangle strings other than symbol
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// names which do not necessarily start with "_Z". Name can be
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// either a C or C++ symbol. Don't call itaniumDemangle if the name
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// does not look like a C++ symbol name to avoid getting unexpected
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// result for a C symbol that happens to match a mangled type name.
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if (!name.startswith("_Z"))
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return None;
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char *buf = itaniumDemangle(name.str().c_str(), nullptr, nullptr, nullptr);
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if (!buf)
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return None;
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std::string s(buf);
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free(buf);
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return s;
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}
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Optional<std::string> lld::demangleMSVC(StringRef name) {
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std::string prefix;
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if (name.consume_front("__imp_"))
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prefix = "__declspec(dllimport) ";
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// Demangle only C++ names.
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if (!name.startswith("?"))
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return None;
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char *buf = microsoftDemangle(name.str().c_str(), nullptr, nullptr, nullptr);
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if (!buf)
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return None;
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std::string s(buf);
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free(buf);
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return prefix + s;
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}
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StringMatcher::StringMatcher(ArrayRef<StringRef> pat) {
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for (StringRef s : pat) {
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Expected<GlobPattern> pat = GlobPattern::create(s);
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if (!pat)
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error(toString(pat.takeError()));
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else
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patterns.push_back(*pat);
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}
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}
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bool StringMatcher::match(StringRef s) const {
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for (const GlobPattern &pat : patterns)
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if (pat.match(s))
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return true;
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return false;
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}
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// Converts a hex string (e.g. "deadbeef") to a vector.
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std::vector<uint8_t> lld::parseHex(StringRef s) {
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std::vector<uint8_t> hex;
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while (!s.empty()) {
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StringRef b = s.substr(0, 2);
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s = s.substr(2);
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uint8_t h;
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if (!to_integer(b, h, 16)) {
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error("not a hexadecimal value: " + b);
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return {};
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}
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hex.push_back(h);
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}
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return hex;
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}
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// Returns true if S is valid as a C language identifier.
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bool lld::isValidCIdentifier(StringRef s) {
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return !s.empty() && (isAlpha(s[0]) || s[0] == '_') &&
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std::all_of(s.begin() + 1, s.end(),
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[](char c) { return c == '_' || isAlnum(c); });
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}
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// Write the contents of the a buffer to a file
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void lld::saveBuffer(StringRef buffer, const Twine &path) {
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std::error_code ec;
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raw_fd_ostream os(path.str(), ec, sys::fs::OpenFlags::F_None);
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if (ec)
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error("cannot create " + path + ": " + ec.message());
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os << buffer;
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}
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