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json_tool.h
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1 // Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
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 
64 enum {
68 };
69 
70 // Defines a char buffer for use with uintToString().
72 
78 static inline void uintToString(LargestUInt value, char*& current) {
79  *--current = 0;
80  do {
81  *--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
82  value /= 10;
83  } while (value != 0);
84 }
85 
91 static inline void fixNumericLocale(char* begin, char* end) {
92  while (begin < end) {
93  if (*begin == ',') {
94  *begin = '.';
95  }
96  ++begin;
97  }
98 }
99 
100 static inline void fixNumericLocaleInput(char* begin, char* end) {
101  char decimalPoint = getDecimalPoint();
102  if (decimalPoint != '\0' && decimalPoint != '.') {
103  while (begin < end) {
104  if (*begin == '.') {
105  *begin = decimalPoint;
106  }
107  ++begin;
108  }
109  }
110 }
111 
112 } // namespace Json {
113 
114 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
static void uintToString(LargestUInt value, char *&current)
Converts an unsigned integer to string.
Definition: json_tool.h:78
#define JSONCPP_STRING
Definition: config.h:179
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:71
static void fixNumericLocale(char *begin, char *end)
Change &#39;,&#39; to &#39;.
Definition: json_tool.h:91
static void fixNumericLocaleInput(char *begin, char *end)
Definition: json_tool.h:100
UInt64 LargestUInt
Definition: config.h:169
JSON (JavaScript Object Notation).
Definition: allocator.h:14
Constant that specify the size of the buffer that must be passed to uintToString. ...
Definition: json_tool.h:67