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json_tool.h
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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 
10 // Also support old flag NO_LOCALE_SUPPORT
11 #ifdef NO_LOCALE_SUPPORT
12 #define JSONCPP_NO_LOCALE_SUPPORT
13 #endif
14 
15 #ifndef JSONCPP_NO_LOCALE_SUPPORT
16 #include <clocale>
17 #endif
18 
19 /* This header provides common string manipulation support, such as UTF-8,
20  * portable conversion from/to string...
21  *
22  * It is an internal header that must not be exposed.
23  */
24 
25 namespace Json {
26 static char getDecimalPoint() {
27 #ifdef JSONCPP_NO_LOCALE_SUPPORT
28  return '\0';
29 #else
30  struct lconv* lc = localeconv();
31  return lc ? *(lc->decimal_point) : '\0';
32 #endif
33 }
34 
36 static inline JSONCPP_STRING codePointToUTF8(unsigned int cp) {
37  JSONCPP_STRING result;
38 
39  // based on description from http://en.wikipedia.org/wiki/UTF-8
40 
41  if (cp <= 0x7f) {
42  result.resize(1);
43  result[0] = static_cast<char>(cp);
44  } else if (cp <= 0x7FF) {
45  result.resize(2);
46  result[1] = static_cast<char>(0x80 | (0x3f & cp));
47  result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
48  } else if (cp <= 0xFFFF) {
49  result.resize(3);
50  result[2] = static_cast<char>(0x80 | (0x3f & cp));
51  result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
52  result[0] = static_cast<char>(0xE0 | (0xf & (cp >> 12)));
53  } else if (cp <= 0x10FFFF) {
54  result.resize(4);
55  result[3] = static_cast<char>(0x80 | (0x3f & cp));
56  result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
57  result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
58  result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
59  }
60 
61  return result;
62 }
63 
65 static inline bool isControlCharacter(char ch) { return ch > 0 && ch <= 0x1F; }
66 
67 enum {
71 };
72 
73 // Defines a char buffer for use with uintToString().
75 
81 static inline void uintToString(LargestUInt value, char*& current) {
82  *--current = 0;
83  do {
84  *--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
85  value /= 10;
86  } while (value != 0);
87 }
88 
94 static inline void fixNumericLocale(char* begin, char* end) {
95  while (begin < end) {
96  if (*begin == ',') {
97  *begin = '.';
98  }
99  ++begin;
100  }
101 }
102 
103 static inline void fixNumericLocaleInput(char* begin, char* end) {
104  char decimalPoint = getDecimalPoint();
105  if (decimalPoint != '\0' && decimalPoint != '.') {
106  while (begin < end) {
107  if (*begin == '.') {
108  *begin = decimalPoint;
109  }
110  ++begin;
111  }
112  }
113 }
114 
115 } // namespace Json {
116 
117 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
static void uintToString(LargestUInt value, char *&current)
Converts an unsigned integer to string.
Definition: json_tool.h:81
#define JSONCPP_STRING
Definition: config.h:176
static char getDecimalPoint()
Definition: json_tool.h:26
static JSONCPP_STRING codePointToUTF8(unsigned int cp)
Converts a unicode code-point to UTF-8.
Definition: json_tool.h:36
char UIntToStringBuffer[uintToStringBufferSize]
Definition: json_tool.h:74
static bool isControlCharacter(char ch)
Returns true if ch is a control character (in range [1,31]).
Definition: json_tool.h:65
static void fixNumericLocale(char *begin, char *end)
Change &#39;,&#39; to &#39;.
Definition: json_tool.h:94
static void fixNumericLocaleInput(char *begin, char *end)
Definition: json_tool.h:103
UInt64 LargestUInt
Definition: config.h:166
Constant that specify the size of the buffer that must be passed to uintToString. ...
Definition: json_tool.h:70