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
6 #ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED
7 # define LIB_JSONCPP_JSON_TOOL_H_INCLUDED
9 /* This header provides common string manipulation support, such as UTF-8,
10 * portable conversion from/to string...
12 * It is an internal header that must not be exposed.
17 /// Converts a unicode code-point to UTF-8.
18 static inline std::string
19 codePointToUTF8(unsigned int cp)
23 // based on description from http://en.wikipedia.org/wiki/UTF-8
28 result[0] = static_cast<char>(cp);
33 result[1] = static_cast<char>(0x80 | (0x3f & cp));
34 result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
36 else if (cp <= 0xFFFF)
39 result[2] = static_cast<char>(0x80 | (0x3f & cp));
40 result[1] = 0x80 | static_cast<char>((0x3f & (cp >> 6)));
41 result[0] = 0xE0 | static_cast<char>((0xf & (cp >> 12)));
43 else if (cp <= 0x10FFFF)
46 result[3] = static_cast<char>(0x80 | (0x3f & cp));
47 result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
48 result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
49 result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
56 /// Returns true if ch is a control character (in range [0,32[).
58 isControlCharacter(char ch)
60 return ch > 0 && ch <= 0x1F;
65 /// Constant that specify the size of the buffer that must be passed to uintToString.
66 uintToStringBufferSize = 3*sizeof(UInt)+1
69 // Defines a char buffer for use with uintToString().
70 typedef char UIntToStringBuffer[uintToStringBufferSize];
73 /** Converts an unsigned integer to string.
74 * @param value Unsigned interger to convert to string
75 * @param current Input/Output string buffer.
76 * Must have at least uintToStringBufferSize chars free.
79 uintToString( UInt value,
85 *--current = char(value % 10) + '0';
93 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED