2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
//===- lib/Core/Reader.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/Core/Reader.h"
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#include "lld/Core/File.h"
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#include "lld/Core/Reference.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Magic.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <algorithm>
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#include <memory>
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using llvm::file_magic;
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using llvm::identify_magic;
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namespace lld {
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YamlIOTaggedDocumentHandler::~YamlIOTaggedDocumentHandler() = default;
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void Registry::add(std::unique_ptr<Reader> reader) {
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_readers.push_back(std::move(reader));
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}
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void Registry::add(std::unique_ptr<YamlIOTaggedDocumentHandler> handler) {
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_yamlHandlers.push_back(std::move(handler));
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}
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ErrorOr<std::unique_ptr<File>>
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Registry::loadFile(std::unique_ptr<MemoryBuffer> mb) const {
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// Get file magic.
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StringRef content(mb->getBufferStart(), mb->getBufferSize());
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file_magic fileType = identify_magic(content);
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// Ask each registered reader if it can handle this file type or extension.
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for (const std::unique_ptr<Reader> &reader : _readers) {
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if (!reader->canParse(fileType, mb->getMemBufferRef()))
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continue;
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return reader->loadFile(std::move(mb), *this);
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}
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// No Reader could parse this file.
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return make_error_code(llvm::errc::executable_format_error);
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}
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static const Registry::KindStrings kindStrings[] = {
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{Reference::kindLayoutAfter, "layout-after"},
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{Reference::kindAssociate, "associate"},
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LLD_KIND_STRING_END};
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Registry::Registry() {
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addKindTable(Reference::KindNamespace::all, Reference::KindArch::all,
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kindStrings);
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}
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bool Registry::handleTaggedDoc(llvm::yaml::IO &io,
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const lld::File *&file) const {
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for (const std::unique_ptr<YamlIOTaggedDocumentHandler> &h : _yamlHandlers)
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if (h->handledDocTag(io, file))
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return true;
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return false;
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}
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void Registry::addKindTable(Reference::KindNamespace ns,
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Reference::KindArch arch,
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const KindStrings array[]) {
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KindEntry entry = { ns, arch, array };
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_kindEntries.push_back(entry);
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}
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bool Registry::referenceKindFromString(StringRef inputStr,
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Reference::KindNamespace &ns,
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Reference::KindArch &arch,
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Reference::KindValue &value) const {
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for (const KindEntry &entry : _kindEntries) {
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for (const KindStrings *pair = entry.array; !pair->name.empty(); ++pair) {
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if (!inputStr.equals(pair->name))
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continue;
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ns = entry.ns;
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arch = entry.arch;
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value = pair->value;
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return true;
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}
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}
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return false;
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}
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bool Registry::referenceKindToString(Reference::KindNamespace ns,
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Reference::KindArch arch,
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Reference::KindValue value,
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StringRef &str) const {
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for (const KindEntry &entry : _kindEntries) {
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if (entry.ns != ns)
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continue;
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if (entry.arch != arch)
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continue;
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for (const KindStrings *pair = entry.array; !pair->name.empty(); ++pair) {
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if (pair->value != value)
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continue;
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str = pair->name;
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return true;
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}
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}
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return false;
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}
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} // end namespace lld
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