61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
// Copyright 2015 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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#include "util/win/command_line.h"
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#include <sys/types.h>
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namespace crashpad {
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// Ref:
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// https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
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void AppendCommandLineArgument(const std::wstring& argument,
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std::wstring* command_line) {
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if (!command_line->empty()) {
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command_line->push_back(L' ');
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}
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// Don’t bother quoting if unnecessary.
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if (!argument.empty() &&
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argument.find_first_of(L" \t\n\v\"") == std::wstring::npos) {
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command_line->append(argument);
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} else {
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command_line->push_back(L'"');
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for (std::wstring::const_iterator i = argument.begin();; ++i) {
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size_t backslash_count = 0;
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while (i != argument.end() && *i == L'\\') {
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++i;
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++backslash_count;
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}
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if (i == argument.end()) {
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// Escape all backslashes, but let the terminating double quotation mark
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// we add below be interpreted as a metacharacter.
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command_line->append(backslash_count * 2, L'\\');
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break;
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} else if (*i == L'"') {
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// Escape all backslashes and the following double quotation mark.
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command_line->append(backslash_count * 2 + 1, L'\\');
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command_line->push_back(*i);
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} else {
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// Backslashes aren’t special here.
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command_line->append(backslash_count, L'\\');
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command_line->push_back(*i);
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}
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}
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command_line->push_back(L'"');
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}
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}
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} // namespace crashpad
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