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//===-- MsgPackDocumentYAML.cpp - MsgPack Document YAML interface -------*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// This file implements YAMLIO on a msgpack::Document.
//
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/MsgPackDocument.h"
#include "llvm/Support/YAMLTraits.h"
using namespace llvm;
using namespace msgpack;
namespace {
// Struct used to represent scalar node. (MapDocNode and ArrayDocNode already
// exist in MsgPackDocument.h.)
struct ScalarDocNode : DocNode {
ScalarDocNode(DocNode N) : DocNode(N) {}
/// Get the YAML tag for this ScalarDocNode. This normally returns ""; it only
/// returns something else if the result of toString would be ambiguous, e.g.
/// a string that parses as a number or boolean.
StringRef getYAMLTag() const;
};
} // namespace
/// Convert this DocNode to a string, assuming it is scalar.
std::string DocNode::toString() const {
std::string S;
raw_string_ostream OS(S);
switch (getKind()) {
case msgpack::Type::String:
OS << Raw;
break;
case msgpack::Type::Nil:
break;
case msgpack::Type::Boolean:
OS << (Bool ? "true" : "false");
break;
case msgpack::Type::Int:
OS << Int;
break;
case msgpack::Type::UInt:
if (getDocument()->getHexMode())
OS << format("%#llx", (unsigned long long)UInt);
else
OS << UInt;
break;
case msgpack::Type::Float:
OS << Float;
break;
default:
llvm_unreachable("not scalar");
break;
}
return OS.str();
}
/// Convert the StringRef and use it to set this DocNode (assuming scalar). If
/// it is a string, copy the string into the Document's strings list so we do
/// not rely on S having a lifetime beyond this call. Tag is "" or a YAML tag.
StringRef DocNode::fromString(StringRef S, StringRef Tag) {
if (Tag == "tag:yaml.org,2002:str")
Tag = "";
if (Tag == "!int" || Tag == "") {
// Try unsigned int then signed int.
*this = getDocument()->getNode(uint64_t(0));
StringRef Err = yaml::ScalarTraits<uint64_t>::input(S, nullptr, getUInt());
if (Err != "") {
*this = getDocument()->getNode(int64_t(0));
Err = yaml::ScalarTraits<int64_t>::input(S, nullptr, getInt());
}
if (Err == "" || Tag != "")
return Err;
}
if (Tag == "!nil") {
*this = getDocument()->getNode();
return "";
}
if (Tag == "!bool" || Tag == "") {
*this = getDocument()->getNode(false);
StringRef Err = yaml::ScalarTraits<bool>::input(S, nullptr, getBool());
if (Err == "" || Tag != "")
return Err;
}
if (Tag == "!float" || Tag == "") {
*this = getDocument()->getNode(0.0);
StringRef Err = yaml::ScalarTraits<double>::input(S, nullptr, getFloat());
if (Err == "" || Tag != "")
return Err;
}
assert((Tag == "!str" || Tag == "") && "unsupported tag");
std::string V;
StringRef Err = yaml::ScalarTraits<std::string>::input(S, nullptr, V);
if (Err == "")
*this = getDocument()->getNode(V, /*Copy=*/true);
return Err;
}
/// Get the YAML tag for this ScalarDocNode. This normally returns ""; it only
/// returns something else if the result of toString would be ambiguous, e.g.
/// a string that parses as a number or boolean.
StringRef ScalarDocNode::getYAMLTag() const {
if (getKind() == msgpack::Type::Nil)
return "!nil";
// Try converting both ways and see if we get the same kind. If not, we need
// a tag.
ScalarDocNode N = getDocument()->getNode();
N.fromString(toString(), "");
if (N.getKind() == getKind())
return "";
// Tolerate signedness of int changing, as tags do not differentiate between
// them anyway.
if (N.getKind() == msgpack::Type::UInt && getKind() == msgpack::Type::Int)
return "";
if (N.getKind() == msgpack::Type::Int && getKind() == msgpack::Type::UInt)
return "";
// We do need a tag.
switch (getKind()) {
case msgpack::Type::String:
return "!str";
case msgpack::Type::Int:
return "!int";
case msgpack::Type::UInt:
return "!int";
case msgpack::Type::Boolean:
return "!bool";
case msgpack::Type::Float:
return "!float";
default:
llvm_unreachable("unrecognized kind");
}
}
namespace llvm {
namespace yaml {
/// YAMLIO for DocNode
template <> struct PolymorphicTraits<DocNode> {
static NodeKind getKind(const DocNode &N) {
switch (N.getKind()) {
case msgpack::Type::Map:
return NodeKind::Map;
case msgpack::Type::Array:
return NodeKind::Sequence;
default:
return NodeKind::Scalar;
}
}
static MapDocNode &getAsMap(DocNode &N) { return N.getMap(/*Convert=*/true); }
static ArrayDocNode &getAsSequence(DocNode &N) {
N.getArray(/*Convert=*/true);
return *static_cast<ArrayDocNode *>(&N);
}
static ScalarDocNode &getAsScalar(DocNode &N) {
return *static_cast<ScalarDocNode *>(&N);
}
};
/// YAMLIO for ScalarDocNode
template <> struct TaggedScalarTraits<ScalarDocNode> {
static void output(const ScalarDocNode &S, void *Ctxt, raw_ostream &OS,
raw_ostream &TagOS) {
TagOS << S.getYAMLTag();
OS << S.toString();
}
static StringRef input(StringRef Str, StringRef Tag, void *Ctxt,
ScalarDocNode &S) {
return S.fromString(Str, Tag);
}
static QuotingType mustQuote(const ScalarDocNode &S, StringRef ScalarStr) {
switch (S.getKind()) {
case Type::Int:
return ScalarTraits<int64_t>::mustQuote(ScalarStr);
case Type::UInt:
return ScalarTraits<uint64_t>::mustQuote(ScalarStr);
case Type::Nil:
return ScalarTraits<StringRef>::mustQuote(ScalarStr);
case Type::Boolean:
return ScalarTraits<bool>::mustQuote(ScalarStr);
case Type::Float:
return ScalarTraits<double>::mustQuote(ScalarStr);
case Type::Binary:
case Type::String:
return ScalarTraits<std::string>::mustQuote(ScalarStr);
default:
llvm_unreachable("unrecognized ScalarKind");
}
}
};
/// YAMLIO for MapDocNode
template <> struct CustomMappingTraits<MapDocNode> {
static void inputOne(IO &IO, StringRef Key, MapDocNode &M) {
ScalarDocNode KeyObj = M.getDocument()->getNode();
KeyObj.fromString(Key, "");
IO.mapRequired(Key.str().c_str(), M.getMap()[KeyObj]);
}
static void output(IO &IO, MapDocNode &M) {
for (auto I : M.getMap()) {
IO.mapRequired(I.first.toString().c_str(), I.second);
}
}
};
/// YAMLIO for ArrayNode
template <> struct SequenceTraits<ArrayDocNode> {
static size_t size(IO &IO, ArrayDocNode &A) { return A.size(); }
static DocNode &element(IO &IO, ArrayDocNode &A, size_t Index) {
return A[Index];
}
};
} // namespace yaml
} // namespace llvm
/// Convert MsgPack Document to YAML text.
void msgpack::Document::toYAML(raw_ostream &OS) {
yaml::Output Yout(OS);
Yout << getRoot();
}
/// Read YAML text into the MsgPack document. Returns false on failure.
bool msgpack::Document::fromYAML(StringRef S) {
clear();
yaml::Input Yin(S);
Yin >> getRoot();
return !Yin.error();
}
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