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///===- llvm/Frontend/Offloading/PropertySet.cpp --------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/Frontend/Offloading/PropertySet.h"
#include "llvm/Support/Base64.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/MemoryBufferRef.h"
using namespace llvm;
using namespace llvm::offloading;
void llvm::offloading::writePropertiesToJSON(
const PropertySetRegistry &PSRegistry, raw_ostream &Out) {
json::OStream J(Out);
J.object([&] {
for (const auto &[CategoryName, PropSet] : PSRegistry) {
auto PropSetCapture = PropSet;
J.attributeObject(CategoryName, [&] {
for (const auto &[PropName, PropVal] : PropSetCapture) {
switch (PropVal.index()) {
case 0:
J.attribute(PropName, std::get<uint32_t>(PropVal));
break;
case 1:
J.attribute(PropName, encodeBase64(std::get<ByteArray>(PropVal)));
break;
default:
llvm_unreachable("unsupported property type");
}
}
});
}
});
}
// note: createStringError has an overload that takes a format string,
// but it uses llvm::format instead of llvm::formatv, which does
// not work with json::Value. This is a helper function to use
// llvm::formatv with createStringError.
template <typename... Ts> auto createStringErrorV(Ts &&...Args) {
return createStringError(formatv(std::forward<Ts>(Args)...));
}
Expected<PropertyValue>
readPropertyValueFromJSON(const json::Value &PropValueVal) {
if (std::optional<uint64_t> Val = PropValueVal.getAsUINT64())
return PropertyValue(static_cast<uint32_t>(*Val));
if (std::optional<StringRef> Val = PropValueVal.getAsString()) {
std::vector<char> Decoded;
if (Error E = decodeBase64(*Val, Decoded))
return createStringErrorV("unable to base64 decode the string {0}: {1}",
Val, toString(std::move(E)));
return PropertyValue(ByteArray(Decoded.begin(), Decoded.end()));
}
return createStringErrorV("expected a uint64 or a string, got {0}",
PropValueVal);
}
Expected<PropertySetRegistry>
llvm::offloading::readPropertiesFromJSON(MemoryBufferRef Buf) {
PropertySetRegistry Res;
Expected<json::Value> V = json::parse(Buf.getBuffer());
if (Error E = V.takeError())
return E;
const json::Object *O = V->getAsObject();
if (!O)
return createStringErrorV(
"error while deserializing property set registry: "
"expected JSON object, got {0}",
*V);
for (const auto &[CategoryName, Value] : *O) {
const json::Object *PropSetVal = Value.getAsObject();
if (!PropSetVal)
return createStringErrorV("error while deserializing property set {0}: "
"expected JSON array, got {1}",
CategoryName.str(), Value);
PropertySet &PropSet = Res[CategoryName.str()];
for (const auto &[PropName, PropValueVal] : *PropSetVal) {
Expected<PropertyValue> Prop = readPropertyValueFromJSON(PropValueVal);
if (Error E = Prop.takeError())
return createStringErrorV(
"error while deserializing property {0} in property set {1}: {2}",
PropName.str(), CategoryName.str(), toString(std::move(E)));
auto [It, Inserted] =
PropSet.try_emplace(PropName.str(), std::move(*Prop));
assert(Inserted && "Property already exists in PropertySet");
(void)Inserted;
}
}
return Res;
}
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