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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef INCLUDE_PERFETTO_EXT_BASE_GETOPT_COMPAT_H_
#define INCLUDE_PERFETTO_EXT_BASE_GETOPT_COMPAT_H_
#include <cstddef> // For std::nullptr_t
// No translation units other than base/getopt.h and getopt_compat_unittest.cc
// should directly include this file. Use base/getopt.h instead.
namespace perfetto {
namespace base {
namespace getopt_compat {
// A tiny getopt() replacement for Windows, which doesn't have <getopt.h>.
// This implementation is based on the subset of features that we use in the
// Perfetto codebase. It doesn't even try to deal with the full surface of GNU's
// getopt().
// Limitations:
// - getopt_long_only() is not supported.
// - optional_argument is not supported. That is extremely subtle and caused us
// problems in the past with GNU's getopt.
// - It does not reorder non-option arguments. It behaves like MacOS getopt, or
// GNU's when POSIXLY_CORRECT=1.
// - Doesn't expose optopt or opterr.
// - option.flag and longindex are not supported and must be nullptr.
enum {
no_argument = 0,
required_argument = 1,
};
struct option {
const char* name;
int has_arg;
std::nullptr_t flag; // Only nullptr is supported.
int val;
};
extern char* optarg;
extern int optind;
int getopt_long(int argc,
char** argv,
const char* shortopts,
const option* longopts,
std::nullptr_t /*longindex is not supported*/);
int getopt(int argc, char** argv, const char* shortopts);
} // namespace getopt_compat
} // namespace base
} // namespace perfetto
#endif // INCLUDE_PERFETTO_EXT_BASE_GETOPT_COMPAT_H_
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