libc/utils/HdrGen/Main.cpp

   1 //===-- "main" function of libc-hdrgen ------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "Generator.h"
  10
  11 #include "llvm/ADT/StringRef.h"
  12 #include "llvm/Support/CommandLine.h"
  13 #include "llvm/TableGen/Main.h"
  14
  15 #include <string>
  16 #include <unordered_map>
  17
  18 namespace {
  19
  20 llvm::cl::opt<std::string>
  21     HeaderDefFile("def", llvm::cl::desc("Path to the .h.def file."),
  22                   llvm::cl::value_desc("<filename>"), llvm::cl::Required);
  23 llvm::cl::opt<std::string> StandardHeader(
  24     "header",
  25     llvm::cl::desc("The standard header file which is to be generated."),
  26     llvm::cl::value_desc("<header file>"));
  27 llvm::cl::list<std::string> EntrypointNamesOption(
  28     "e", llvm::cl::value_desc("<list of entrypoints>"),
  29     llvm::cl::desc(
  30         "Each --e is one entrypoint (generated from entrypoints.txt)"),
  31     llvm::cl::OneOrMore);
  32 llvm::cl::list<std::string> ReplacementValues(
  33     "args", llvm::cl::desc("Command separated <argument name>=<value> pairs."),
  34     llvm::cl::value_desc("<name=value>[,name=value]"));
  35
  36 void ParseArgValuePairs(std::unordered_map<std::string, std::string> &Map) {
  37   for (std::string &R : ReplacementValues) {
  38     auto Pair = llvm::StringRef(R).split('=');
  39     Map[std::string(Pair.first)] = std::string(Pair.second);
  40   }
  41 }
  42
  43 } // anonymous namespace
  44
  45 namespace llvm_libc {
  46
  47 bool HeaderGeneratorMain(llvm::raw_ostream &OS, llvm::RecordKeeper &Records) {
  48   std::unordered_map<std::string, std::string> ArgMap;
  49   ParseArgValuePairs(ArgMap);
  50   Generator G(HeaderDefFile, EntrypointNamesOption, StandardHeader, ArgMap);
  51   G.generate(OS, Records);
  52
  53   return false;
  54 }
  55
  56 } // namespace llvm_libc
  57
  58 int main(int argc, char *argv[]) {
  59   llvm::cl::ParseCommandLineOptions(argc, argv);
  60   return TableGenMain(argv[0], &llvm_libc::HeaderGeneratorMain);
  61 }