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// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_TOOLS_TOOL_SUPPORT_H_
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#define CRASHPAD_TOOLS_TOOL_SUPPORT_H_
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#include <string>
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#include "base/files/file_path.h"
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#include "base/macros.h"
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#include "base/strings/string_piece.h"
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#include "build/build_config.h"
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namespace crashpad {
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//! \brief Common functions used by command line tools.
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class ToolSupport {
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public:
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//! \brief Handles `--version`.
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//!
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//! \param[in] me The tool’s name, the basename of `argv[0]`.
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static void Version(const base::FilePath& me);
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//! \brief Prints the footer for `--help`.
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//!
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//! \param[in] me The tool’s name, the basename of `argv[0]`.
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static void UsageTail(const base::FilePath& me);
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//! \brief Suggests using `--help` when a command line tool can’t make sense
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//! of its arguments.
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//!
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//! \param[in] me The tool’s name, the basename of `argv[0]`.
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//! \param[in] hint A hint to display before the suggestion to try `--help`.
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//! Optional, may be `nullptr`, in which case no hint will be presented.
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static void UsageHint(const base::FilePath& me, const char* hint);
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#if defined(OS_POSIX) || DOXYGEN
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//! \copydoc Version
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static void Version(const std::string& me);
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//! \copydoc UsageTail
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static void UsageTail(const std::string& me);
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//! \copydoc UsageHint
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static void UsageHint(const std::string& me, const char* hint);
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#endif // OS_POSIX
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#if defined(OS_WIN) || DOXYGEN
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//! \brief Converts \a argv `wchar_t` UTF-16 to UTF-8, and passes onwards to a
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//! UTF-8 entry point.
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//!
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//! \return The return value of \a entry.
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static int Wmain(int argc, wchar_t* argv[], int (*entry)(int, char*[]));
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#endif // OS_WIN
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//! \brief Converts a command line argument to the string type suitable for
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//! base::FilePath.
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//!
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//! On POSIX, this is a no-op. On Windows, assumes that Wmain() was used, and
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//! the input argument was converted from UTF-16 in a `wchar_t*` to UTF-8 in a
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//! `char*`. This undoes that transformation.
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//!
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//! \sa Wmain()
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//! \sa FilePathToCommandLineArgument()
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static base::FilePath::StringType CommandLineArgumentToFilePathStringType(
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const base::StringPiece& arg);
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//! \brief Converts a base::FilePath to a command line argument.
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//!
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//! On POSIX, this is a no-op. On Windows, this undoes the transformation done
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//! by CommandLineArgumentToFilePathStringType() in the same manner as
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//! Wmain().
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static std::string FilePathToCommandLineArgument(
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const base::FilePath& file_path);
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(ToolSupport);
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};
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} // namespace crashpad
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#endif // CRASHPAD_TOOLS_TOOL_SUPPORT_H_
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