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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "tools/gn/escape.h"
#include "base/containers/stack_container.h"
namespace {
template<typename DestString>
void EscapeStringToString(const base::StringPiece& str,
const EscapeOptions& options,
DestString* dest) {
bool used_quotes = false;
for (size_t i = 0; i < str.size(); i++) {
if (str[i] == '$' && options.mode == ESCAPE_NINJA) {
// Escape dollars signs since ninja treats these specially.
dest->push_back('$');
dest->push_back('$');
} else if (str[i] == '"' && options.mode == ESCAPE_SHELL) {
// Escape quotes with backslashes for the command-line (Ninja doesn't
// care).
dest->push_back('\\');
dest->push_back('"');
} else if (str[i] == ' ') {
if (options.mode == ESCAPE_NINJA) {
// For ninja just escape spaces with $.
dest->push_back('$');
} else if (options.mode == ESCAPE_SHELL && !options.inhibit_quoting) {
// For the shell, quote the whole string.
if (!used_quotes) {
used_quotes = true;
dest->insert(dest->begin(), '"');
}
}
dest->push_back(' ');
#if defined(OS_WIN)
} else if (str[i] == '/' && options.convert_slashes) {
// Convert slashes on Windows if requested.
dest->push_back('\\');
#else
} else if (str[i] == '\\' && options.mode == ESCAPE_SHELL) {
// For non-Windows shell, escape backslashes.
dest->push_back('\\');
dest->push_back('\\');
#endif
} else {
dest->push_back(str[i]);
}
}
if (used_quotes)
dest->push_back('"');
}
} // namespace
std::string EscapeString(const base::StringPiece& str,
const EscapeOptions& options) {
std::string result;
result.reserve(str.size() + 4); // Guess we'll add a couple of extra chars.
EscapeStringToString(str, options, &result);
return result;
}
void EscapeStringToStream(std::ostream& out,
const base::StringPiece& str,
const EscapeOptions& options) {
// Escape to a stack buffer and then write out to the stream.
base::StackVector<char, 256> result;
result->reserve(str.size() + 4); // Guess we'll add a couple of extra chars.
EscapeStringToString(str, options, &result.container());
if (!result->empty())
out.write(result->data(), result->size());
}
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