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