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// Copyright 2010 The Kyua Authors.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
// * Neither the name of Google Inc. nor the names of its contributors
//   may be used to endorse or promote products derived from this software
//   without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "utils/cmdline/globals.hpp"

#include "utils/format/macros.hpp"
#include "utils/logging/macros.hpp"
#include "utils/fs/path.hpp"
#include "utils/sanity.hpp"

namespace cmdline = utils::cmdline;

namespace {


/// The name of the binary used to execute the program.
static std::string Progname;


}  // anonymous namespace


/// Initializes the global state of the CLI.
///
/// This function can only be called once during the execution of a program,
/// unless override_for_testing is set to true.
///
/// \param argv0 The value of argv[0]; i.e. the program name.
/// \param override_for_testing Should always be set to false unless for tests
///     of this functionality, which may set this to true to redefine internal
///     state.
void
cmdline::init(const char* argv0, const bool override_for_testing)
{
    if (!override_for_testing)
        PRE_MSG(Progname.empty(), "cmdline::init called more than once");
    Progname = utils::fs::path(argv0).leaf_name();
    LD(F("Program name: %s") % Progname);
    POST(!Progname.empty());
}


/// Gets the program name.
///
/// \pre init() must have been called in advance.
///
/// \return The program name.
const std::string&
cmdline::progname(void)
{
    PRE_MSG(!Progname.empty(), "cmdline::init not called yet");
    return Progname;
}