1 // Copyright 2007-2010 Baptiste Lepilleur 2 // Distributed under MIT license, or public domain if desired and 3 // recognized in your jurisdiction. 4 // See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE 5 6 #ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED 7 #define LIB_JSONCPP_JSON_TOOL_H_INCLUDED 8 9 /* This header provides common string manipulation support, such as UTF-8, 10 * portable conversion from/to string... 11 * 12 * It is an internal header that must not be exposed. 13 */ 14 15 namespace Json { 16 17 /// Converts a unicode code-point to UTF-8. 18 static inline std::string codePointToUTF8(unsigned int cp) { 19 std::string result; 20 21 // based on description from http://en.wikipedia.org/wiki/UTF-8 22 23 if (cp <= 0x7f) { 24 result.resize(1); 25 result[0] = static_cast<char>(cp); 26 } else if (cp <= 0x7FF) { 27 result.resize(2); 28 result[1] = static_cast<char>(0x80 | (0x3f & cp)); 29 result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6))); 30 } else if (cp <= 0xFFFF) { 31 result.resize(3); 32 result[2] = static_cast<char>(0x80 | (0x3f & cp)); 33 result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6))); 34 result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12))); 35 } else if (cp <= 0x10FFFF) { 36 result.resize(4); 37 result[3] = static_cast<char>(0x80 | (0x3f & cp)); 38 result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6))); 39 result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12))); 40 result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18))); 41 } 42 43 return result; 44 } 45 46 /// Returns true if ch is a control character (in range [0,32[). 47 static inline bool isControlCharacter(char ch) { return ch > 0 && ch <= 0x1F; } 48 49 enum { 50 /// Constant that specify the size of the buffer that must be passed to 51 /// uintToString. 52 uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1 53 }; 54 55 // Defines a char buffer for use with uintToString(). 56 typedef char UIntToStringBuffer[uintToStringBufferSize]; 57 58 /** Converts an unsigned integer to string. 59 * @param value Unsigned interger to convert to string 60 * @param current Input/Output string buffer. 61 * Must have at least uintToStringBufferSize chars free. 62 */ 63 static inline void uintToString(LargestUInt value, char*& current) { 64 *--current = 0; 65 do { 66 *--current = char(value % 10) + '0'; 67 value /= 10; 68 } while (value != 0); 69 } 70 71 /** Change ',' to '.' everywhere in buffer. 72 * 73 * We had a sophisticated way, but it did not work in WinCE. 74 * @see https://github.com/open-source-parsers/jsoncpp/pull/9 75 */ 76 static inline void fixNumericLocale(char* begin, char* end) { 77 while (begin < end) { 78 if (*begin == ',') { 79 *begin = '.'; 80 } 81 ++begin; 82 } 83 } 84 85 } // namespace Json { 86 87 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED 88
