| //===---- Implementation of the main header generation class -----*- C++ -*===// |
| // |
| // 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 "Generator.h" |
| |
| #include "IncludeFileCommand.h" |
| #include "PublicAPICommand.h" |
| |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| #include <cstdlib> |
| #include <memory> |
| |
| static const char CommandPrefix[] = "%%"; |
| static const size_t CommandPrefixSize = llvm::StringRef(CommandPrefix).size(); |
| |
| static const char CommentPrefix[] = "<!>"; |
| |
| static const char ParamNamePrefix[] = "${"; |
| static const size_t ParamNamePrefixSize = |
| llvm::StringRef(ParamNamePrefix).size(); |
| static const char ParamNameSuffix[] = "}"; |
| static const size_t ParamNameSuffixSize = |
| llvm::StringRef(ParamNameSuffix).size(); |
| |
| namespace llvm_libc { |
| |
| Command *Generator::getCommandHandler(llvm::StringRef CommandName) { |
| if (CommandName == IncludeFileCommand::Name) { |
| if (!IncludeFileCmd) |
| IncludeFileCmd = std::make_unique<IncludeFileCommand>(); |
| return IncludeFileCmd.get(); |
| } else if (CommandName == PublicAPICommand::Name) { |
| if (!PublicAPICmd) |
| PublicAPICmd = std::make_unique<PublicAPICommand>(); |
| return PublicAPICmd.get(); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| void Generator::parseCommandArgs(llvm::StringRef ArgStr, ArgVector &Args) { |
| if (!ArgStr.contains(',') && ArgStr.trim(' ').trim('\t').size() == 0) { |
| // If it is just space between the parenthesis |
| return; |
| } |
| |
| ArgStr.split(Args, ","); |
| for (llvm::StringRef &A : Args) { |
| A = A.trim(' '); |
| if (A.startswith(ParamNamePrefix) && A.endswith(ParamNameSuffix)) { |
| A = A.drop_front(ParamNamePrefixSize).drop_back(ParamNameSuffixSize); |
| A = ArgMap[A]; |
| } |
| } |
| } |
| |
| void Generator::generate(llvm::raw_ostream &OS, llvm::RecordKeeper &Records) { |
| auto DefFileBuffer = llvm::MemoryBuffer::getFile(HeaderDefFile); |
| if (!DefFileBuffer) { |
| llvm::errs() << "Unable to open " << HeaderDefFile << ".\n"; |
| std::exit(1); |
| } |
| llvm::SourceMgr SrcMgr; |
| unsigned DefFileID = SrcMgr.AddNewSourceBuffer( |
| std::move(DefFileBuffer.get()), llvm::SMLoc::getFromPointer(nullptr)); |
| |
| llvm::StringRef Content = SrcMgr.getMemoryBuffer(DefFileID)->getBuffer(); |
| while (true) { |
| std::pair<llvm::StringRef, llvm::StringRef> P = Content.split('\n'); |
| Content = P.second; |
| |
| llvm::StringRef Line = P.first.trim(' '); |
| if (Line.startswith(CommandPrefix)) { |
| Line = Line.drop_front(CommandPrefixSize); |
| |
| P = Line.split("("); |
| if (P.second.empty() || P.second[P.second.size() - 1] != ')') { |
| SrcMgr.PrintMessage(llvm::SMLoc::getFromPointer(P.second.data()), |
| llvm::SourceMgr::DK_Error, |
| "Command argument list should begin with '(' " |
| "and end with ')'."); |
| std::exit(1); |
| } |
| llvm::StringRef CommandName = P.first; |
| Command *Cmd = getCommandHandler(CommandName); |
| if (Cmd == nullptr) { |
| SrcMgr.PrintMessage(llvm::SMLoc::getFromPointer(CommandName.data()), |
| llvm::SourceMgr::DK_Error, |
| "Unknown command '%%" + CommandName + "'."); |
| std::exit(1); |
| } |
| |
| llvm::StringRef ArgStr = P.second.drop_back(1); |
| ArgVector Args; |
| parseCommandArgs(ArgStr, Args); |
| |
| Command::ErrorReporter Reporter( |
| llvm::SMLoc::getFromPointer(CommandName.data()), SrcMgr); |
| Cmd->run(OS, Args, StdHeader, Records, Reporter); |
| } else if (!Line.startswith(CommentPrefix)) { |
| // There is no comment or command on this line so we just write it as is. |
| OS << P.first << "\n"; |
| } |
| |
| if (P.second.empty()) |
| break; |
| } |
| } |
| |
| } // namespace llvm_libc |