| // Copyright 2007-2010 Baptiste Lepilleur |
| // Distributed under MIT license, or public domain if desired and |
| // recognized in your jurisdiction. |
| // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE |
| |
| #ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED |
| # define LIB_JSONCPP_JSON_TOOL_H_INCLUDED |
| |
| /* This header provides common string manipulation support, such as UTF-8, |
| * portable conversion from/to string... |
| * |
| * It is an internal header that must not be exposed. |
| */ |
| |
| namespace Json { |
| |
| /// Converts a unicode code-point to UTF-8. |
| static inline std::string |
| codePointToUTF8(unsigned int cp) |
| { |
| std::string result; |
| |
| // based on description from http://en.wikipedia.org/wiki/UTF-8 |
| |
| if (cp <= 0x7f) |
| { |
| result.resize(1); |
| result[0] = static_cast<char>(cp); |
| } |
| else if (cp <= 0x7FF) |
| { |
| result.resize(2); |
| result[1] = static_cast<char>(0x80 | (0x3f & cp)); |
| result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6))); |
| } |
| else if (cp <= 0xFFFF) |
| { |
| result.resize(3); |
| result[2] = static_cast<char>(0x80 | (0x3f & cp)); |
| result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6))); |
| result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12))); |
| } |
| else if (cp <= 0x10FFFF) |
| { |
| result.resize(4); |
| result[3] = static_cast<char>(0x80 | (0x3f & cp)); |
| result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6))); |
| result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12))); |
| result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18))); |
| } |
| |
| return result; |
| } |
| |
| |
| /// Returns true if ch is a control character (in range [0,32[). |
| static inline bool |
| isControlCharacter(char ch) |
| { |
| return ch > 0 && ch <= 0x1F; |
| } |
| |
| |
| enum { |
| /// Constant that specify the size of the buffer that must be passed to uintToString. |
| uintToStringBufferSize = 3*sizeof(LargestUInt)+1 |
| }; |
| |
| // Defines a char buffer for use with uintToString(). |
| typedef char UIntToStringBuffer[uintToStringBufferSize]; |
| |
| |
| /** Converts an unsigned integer to string. |
| * @param value Unsigned interger to convert to string |
| * @param current Input/Output string buffer. |
| * Must have at least uintToStringBufferSize chars free. |
| */ |
| static inline void |
| uintToString( LargestUInt value, |
| char *¤t ) |
| { |
| *--current = 0; |
| do |
| { |
| *--current = char(value % 10) + '0'; |
| value /= 10; |
| } |
| while ( value != 0 ); |
| } |
| |
| } // namespace Json { |
| |
| #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED |