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90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "LogCommandLineHandler.h"
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#include "mozilla/Tokenizer.h"
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#include "nsDebug.h"
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namespace mozilla {
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void LoggingHandleCommandLineArgs(
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int argc, char const* const* argv,
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std::function<void(nsACString const&)> const& consumer) {
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// Keeps the name of a pending env var (MOZ_LOG or MOZ_LOG_FILE) that
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// we expect to get a value for in the next iterated arg.
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// Used for the `-MOZ_LOG <modules>` form of argument.
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nsAutoCString env;
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auto const names = {"MOZ_LOG"_ns, "MOZ_LOG_FILE"_ns};
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for (int arg = 1; arg < argc; ++arg) {
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Tokenizer p(argv[arg]);
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if (!env.IsEmpty() && p.CheckChar('-')) {
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NS_WARNING(
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"Expects value after -MOZ_LOG(_FILE) argument, but another argument "
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"found");
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// We only expect values for the pending env var, start over
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p.Rollback();
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env.Truncate();
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}
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if (env.IsEmpty()) {
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if (!p.CheckChar('-')) {
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continue;
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}
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// We accept `-MOZ_LOG` as well as `--MOZ_LOG`.
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Unused << p.CheckChar('-');
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for (auto const& name : names) {
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if (!p.CheckWord(name)) {
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continue;
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}
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env.Assign(name);
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env.Append('=');
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break;
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}
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if (env.IsEmpty()) {
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// An unknonwn argument, ignore.
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continue;
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}
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// We accept `-MOZ_LOG <modules>` as well as `-MOZ_LOG=<modules>`.
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if (p.CheckEOF()) {
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// We have a lone `-MOZ_LOG` arg, the next arg is expected to be
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// the value, |env| is now prepared as `MOZ_LOG=`.
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continue;
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}
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if (!p.CheckChar('=')) {
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// There is a character after the arg name and it's not '=',
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// ignore this argument.
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NS_WARNING("-MOZ_LOG(_FILE) argument not in a proper form");
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env.Truncate();
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continue;
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}
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}
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// This can be non-empty from previous iteration or in this iteration.
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if (!env.IsEmpty()) {
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nsDependentCSubstring value;
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Unused << p.ReadUntil(Tokenizer::Token::EndOfFile(), value);
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env.Append(value);
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consumer(env);
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env.Truncate();
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}
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}
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}
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} // namespace mozilla
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