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//===-- Implementation of PublicAPICommand --------------------------------===//
//
// 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 "PublicAPICommand.h"
#include "utils/LibcTableGenUtil/APIIndexer.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/TableGen/Record.h"
// Text blocks for macro definitions and type decls can be indented to
// suit the surrounding tablegen listing. We need to dedent such blocks
// before writing them out.
static void dedentAndWrite(llvm::StringRef Text, llvm::raw_ostream &OS) {
llvm::SmallVector<llvm::StringRef, 10> Lines;
llvm::SplitString(Text, Lines, "\n");
size_t shortest_indent = 1024;
for (llvm::StringRef L : Lines) {
llvm::StringRef Indent = L.take_while([](char c) { return c == ' '; });
size_t IndentSize = Indent.size();
if (Indent.size() == L.size()) {
// Line is all spaces so no point noting the indent.
continue;
}
if (IndentSize < shortest_indent)
shortest_indent = IndentSize;
}
for (llvm::StringRef L : Lines) {
if (L.size() >= shortest_indent)
OS << L.drop_front(shortest_indent) << '\n';
}
}
static std::string getTypeHdrName(const std::string &Name) {
llvm::SmallVector<llvm::StringRef> Parts;
llvm::SplitString(llvm::StringRef(Name), Parts);
return llvm::join(Parts.begin(), Parts.end(), "_");
}
namespace llvm_libc {
void writeAPIFromIndex(APIIndexer &G,
std::vector<std::string> EntrypointNameList,
llvm::raw_ostream &OS) {
for (auto &Pair : G.MacroDefsMap) {
const std::string &Name = Pair.first;
if (G.MacroSpecMap.find(Name) == G.MacroSpecMap.end())
llvm::PrintFatalError(Name + " not found in any standard spec.\n");
llvm::Record *MacroDef = Pair.second;
dedentAndWrite(MacroDef->getValueAsString("Defn"), OS);
OS << '\n';
}
for (auto &TypeName : G.RequiredTypes) {
if (G.TypeSpecMap.find(TypeName) == G.TypeSpecMap.end())
llvm::PrintFatalError(TypeName + " not found in any standard spec.\n");
OS << "#include <llvm-libc-types/" << getTypeHdrName(TypeName) << ".h>\n";
}
OS << '\n';
if (G.Enumerations.size() != 0)
OS << "enum {" << '\n';
for (const auto &Name : G.Enumerations) {
if (G.EnumerationSpecMap.find(Name) == G.EnumerationSpecMap.end())
llvm::PrintFatalError(
Name + " is not listed as an enumeration in any standard spec.\n");
llvm::Record *EnumerationSpec = G.EnumerationSpecMap[Name];
OS << " " << EnumerationSpec->getValueAsString("Name");
auto Value = EnumerationSpec->getValueAsString("Value");
if (Value == "__default__") {
OS << ",\n";
} else {
OS << " = " << Value << ",\n";
}
}
if (G.Enumerations.size() != 0)
OS << "};\n\n";
OS << "__BEGIN_C_DECLS\n\n";
for (auto &Name : EntrypointNameList) {
if (G.FunctionSpecMap.find(Name) == G.FunctionSpecMap.end()) {
continue; // Functions that aren't in this header file are skipped as
// opposed to erroring out because the list of functions being
// iterated over is the complete list of functions with
// entrypoints. Thus this is filtering out the functions that
// don't go to this header file, whereas the other, similar
// conditionals above are more of a sanity check.
}
llvm::Record *FunctionSpec = G.FunctionSpecMap[Name];
llvm::Record *RetValSpec = FunctionSpec->getValueAsDef("Return");
llvm::Record *ReturnType = RetValSpec->getValueAsDef("ReturnType");
OS << G.getTypeAsString(ReturnType) << " " << Name << "(";
auto ArgsList = FunctionSpec->getValueAsListOfDefs("Args");
for (size_t i = 0; i < ArgsList.size(); ++i) {
llvm::Record *ArgType = ArgsList[i]->getValueAsDef("ArgType");
OS << G.getTypeAsString(ArgType);
if (i < ArgsList.size() - 1)
OS << ", ";
}
OS << ");\n\n";
}
// Make another pass over entrypoints to emit object declarations.
for (const auto &Name : EntrypointNameList) {
if (G.ObjectSpecMap.find(Name) == G.ObjectSpecMap.end())
continue;
llvm::Record *ObjectSpec = G.ObjectSpecMap[Name];
auto Type = ObjectSpec->getValueAsString("Type");
OS << "extern " << Type << " " << Name << ";\n";
}
OS << "__END_C_DECLS\n";
}
void writePublicAPI(llvm::raw_ostream &OS, llvm::RecordKeeper &Records) {}
const char PublicAPICommand::Name[] = "public_api";
void PublicAPICommand::run(llvm::raw_ostream &OS, const ArgVector &Args,
llvm::StringRef StdHeader,
llvm::RecordKeeper &Records,
const Command::ErrorReporter &Reporter) const {
if (Args.size() != 0) {
Reporter.printFatalError("public_api command does not take any arguments.");
}
APIIndexer G(StdHeader, Records);
writeAPIFromIndex(G, EntrypointNameList, OS);
}
} // namespace llvm_libc
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