1 //===- lib/Core/Reader.cpp ------------------------------------------------===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "lld/Core/Reader.h"
11 #include "lld/Core/File.h"
12 #include "lld/Core/Reference.h"
13 #include "llvm/ADT/StringRef.h"
14 #include "llvm/Support/Errc.h"
15 #include "llvm/Support/FileSystem.h"
16 #include "llvm/Support/MemoryBuffer.h"
22 YamlIOTaggedDocumentHandler::~YamlIOTaggedDocumentHandler() = default;
24 void Registry::add(std::unique_ptr<Reader> reader) {
25 _readers.push_back(std::move(reader));
28 void Registry::add(std::unique_ptr<YamlIOTaggedDocumentHandler> handler) {
29 _yamlHandlers.push_back(std::move(handler));
32 ErrorOr<std::unique_ptr<File>>
33 Registry::loadFile(std::unique_ptr<MemoryBuffer> mb) const {
35 StringRef content(mb->getBufferStart(), mb->getBufferSize());
36 llvm::sys::fs::file_magic fileType = llvm::sys::fs::identify_magic(content);
38 // Ask each registered reader if it can handle this file type or extension.
39 for (const std::unique_ptr<Reader> &reader : _readers) {
40 if (!reader->canParse(fileType, mb->getMemBufferRef()))
42 return reader->loadFile(std::move(mb), *this);
45 // No Reader could parse this file.
46 return make_error_code(llvm::errc::executable_format_error);
49 static const Registry::KindStrings kindStrings[] = {
50 {Reference::kindLayoutAfter, "layout-after"},
51 {Reference::kindAssociate, "associate"},
54 Registry::Registry() {
55 addKindTable(Reference::KindNamespace::all, Reference::KindArch::all,
59 bool Registry::handleTaggedDoc(llvm::yaml::IO &io,
60 const lld::File *&file) const {
61 for (const std::unique_ptr<YamlIOTaggedDocumentHandler> &h : _yamlHandlers)
62 if (h->handledDocTag(io, file))
67 void Registry::addKindTable(Reference::KindNamespace ns,
68 Reference::KindArch arch,
69 const KindStrings array[]) {
70 KindEntry entry = { ns, arch, array };
71 _kindEntries.push_back(entry);
74 bool Registry::referenceKindFromString(StringRef inputStr,
75 Reference::KindNamespace &ns,
76 Reference::KindArch &arch,
77 Reference::KindValue &value) const {
78 for (const KindEntry &entry : _kindEntries) {
79 for (const KindStrings *pair = entry.array; !pair->name.empty(); ++pair) {
80 if (!inputStr.equals(pair->name))
91 bool Registry::referenceKindToString(Reference::KindNamespace ns,
92 Reference::KindArch arch,
93 Reference::KindValue value,
94 StringRef &str) const {
95 for (const KindEntry &entry : _kindEntries) {
98 if (entry.arch != arch)
100 for (const KindStrings *pair = entry.array; !pair->name.empty(); ++pair) {
101 if (pair->value != value)
110 } // end namespace lld