| // Copyright 2008, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #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) { |
| 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 |