From 533e26103e1cdeb4201056ba8ff655d3f2604b9f Mon Sep 17 00:00:00 2001 From: Justin Bogner Date: Thu, 30 Oct 2014 20:29:48 +0000 Subject: [PATCH] llvm-cov: Very basic top level help llvm-svn: 220926 --- llvm/tools/llvm-cov/llvm-cov.cpp | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/llvm/tools/llvm-cov/llvm-cov.cpp b/llvm/tools/llvm-cov/llvm-cov.cpp index 8c1ad8b..132c187 100644 --- a/llvm/tools/llvm-cov/llvm-cov.cpp +++ b/llvm/tools/llvm-cov/llvm-cov.cpp @@ -12,6 +12,7 @@ //===----------------------------------------------------------------------===// #include "llvm/ADT/StringRef.h" +#include "llvm/ADT/StringSwitch.h" #include "llvm/Support/raw_ostream.h" #include "llvm/Support/Path.h" #include @@ -30,6 +31,13 @@ int convert_for_testing_main(int argc, const char **argv); /// \brief The main entry point for the gcov compatible coverage tool. int gcov_main(int argc, const char **argv); +/// \brief Top level help. +int help_main(int argc, const char **argv) { + errs() << "OVERVIEW: LLVM code coverage tool\n\n" + << "USAGE: llvm-cov {gcov|report|show}\n"; + return 0; +} + int main(int argc, const char **argv) { // If argv[0] is or ends with 'gcov', always be gcov compatible if (sys::path::stem(argv[0]).endswith_lower("gcov")) @@ -37,17 +45,15 @@ int main(int argc, const char **argv) { // Check if we are invoking a specific tool command. if (argc > 1) { - int (*func)(int, const char **) = nullptr; - - StringRef command = argv[1]; - if (command.equals_lower("show")) - func = show_main; - else if (command.equals_lower("report")) - func = report_main; - else if (command.equals_lower("convert-for-testing")) - func = convert_for_testing_main; - else if (command.equals_lower("gcov")) - func = gcov_main; + typedef int (*MainFunction)(int, const char **); + MainFunction func = + StringSwitch(argv[1]) + .Case("convert-for-testing", convert_for_testing_main) + .Case("gcov", gcov_main) + .Case("report", report_main) + .Case("show", show_main) + .Cases("-h", "-help", "--help", help_main) + .Default(nullptr); if (func) { std::string Invocation = std::string(argv[0]) + " " + argv[1]; -- 2.7.4