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