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 }
62