| // Copyright (c) 2006-2008 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 "base/string_escape.h" |
| |
| #include <string> |
| |
| #include "base/string_util.h" |
| |
| namespace string_escape { |
| |
| // Try to escape |c| as a "SingleEscapeCharacter" (\n, etc). If successful, |
| // returns true and appends the escape sequence to |dst|. |
| template<typename CHAR> |
| static bool JavascriptSingleEscapeChar(const CHAR c, std::string* dst) { |
| // WARNING: if you add a new case here, you need to update the reader as well. |
| switch (c) { |
| case '\b': |
| dst->append("\\b"); |
| break; |
| case '\f': |
| dst->append("\\f"); |
| break; |
| case '\n': |
| dst->append("\\n"); |
| break; |
| case '\r': |
| dst->append("\\r"); |
| break; |
| case '\t': |
| dst->append("\\t"); |
| break; |
| case '\v': |
| dst->append("\\v"); |
| break; |
| case '\\': |
| dst->append("\\\\"); |
| break; |
| case '"': |
| dst->append("\\\""); |
| break; |
| default: |
| return false; |
| } |
| return true; |
| } |
| |
| void JavascriptDoubleQuote(const std::wstring& str, |
| bool put_in_quotes, |
| std::string* dst) { |
| if (put_in_quotes) |
| dst->push_back('"'); |
| |
| for (std::wstring::const_iterator it = str.begin(); it != str.end(); ++it) { |
| wchar_t c = *it; |
| if (!JavascriptSingleEscapeChar(c, dst)) { |
| if (c > 255) { |
| // Non-ascii values need to be unicode dst-> |
| // TODO(tc): Some unicode values are handled specially. See |
| // spidermonkey code. |
| StringAppendF(dst, "\\u%04X", c); |
| } else if (c < 32 || c > 126) { |
| // Spidermonkey hex escapes these values. |
| StringAppendF(dst, "\\x%02X", c); |
| } else { |
| dst->push_back(static_cast<char>(c)); |
| } |
| } |
| } |
| |
| if (put_in_quotes) |
| dst->push_back('"'); |
| } |
| |
| void JavascriptDoubleQuote(const std::string& str, |
| bool put_in_quotes, |
| std::string* dst) { |
| if (put_in_quotes) |
| dst->push_back('"'); |
| |
| for (std::string::const_iterator it = str.begin(); it != str.end(); ++it) { |
| unsigned char c = *it; |
| if (!JavascriptSingleEscapeChar(c, dst)) { |
| // Hex encode if the character is non-printable 7bit ascii |
| if (c < 32 || c == 127) { |
| StringAppendF(dst, "\\x%02X", c); |
| } else { |
| dst->push_back(static_cast<char>(c)); |
| } |
| } |
| } |
| |
| if (put_in_quotes) |
| dst->push_back('"'); |
| } |
| |
| } // namespace string_escape |
| |