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.
codePointToUTF8(unsigned int cp)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[).
isControlCharacter(char ch)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 */
uintToString(LargestUInt value,char * & current)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 */
fixNumericLocale(char * begin,char * end)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