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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 #if !defined(JSON_IS_AMALGAMATION)
10 #include <json/config.h>
11 #endif
12
13 // Also support old flag NO_LOCALE_SUPPORT
14 #ifdef NO_LOCALE_SUPPORT
15 #define JSONCPP_NO_LOCALE_SUPPORT
16 #endif
17
18 #ifndef JSONCPP_NO_LOCALE_SUPPORT
19 #include <clocale>
20 #endif
21
22 /* This header provides common string manipulation support, such as UTF-8,
23 * portable conversion from/to string...
24 *
25 * It is an internal header that must not be exposed.
26 */
27
28 namespace Json {
29 static inline char getDecimalPoint() {
30 #ifdef JSONCPP_NO_LOCALE_SUPPORT
31 return '\0';
32 #else
33 struct lconv* lc = localeconv();
34 return lc ? *(lc->decimal_point) : '\0';
35 #endif
36 }
37
39 static inline String codePointToUTF8(unsigned int cp) {
40 String result;
41
42 // based on description from http://en.wikipedia.org/wiki/UTF-8
43
44 if (cp <= 0x7f) {
45 result.resize(1);
46 result[0] = static_cast<char>(cp);
47 } else if (cp <= 0x7FF) {
48 result.resize(2);
49 result[1] = static_cast<char>(0x80 | (0x3f & cp));
50 result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
51 } else if (cp <= 0xFFFF) {
52 result.resize(3);
53 result[2] = static_cast<char>(0x80 | (0x3f & cp));
54 result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
55 result[0] = static_cast<char>(0xE0 | (0xf & (cp >> 12)));
56 } else if (cp <= 0x10FFFF) {
57 result.resize(4);
58 result[3] = static_cast<char>(0x80 | (0x3f & cp));
59 result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
60 result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
61 result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
62 }
63
64 return result;
65 }
66
67 enum {
70 uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1
71 };
72
73 // Defines a char buffer for use with uintToString().
74 typedef char UIntToStringBuffer[uintToStringBufferSize];
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 template <typename Iter> Iter fixNumericLocale(Iter begin, Iter end) {
95 for (; begin != end; ++begin) {
96 if (*begin == ',') {
97 *begin = '.';
98 }
99 }
100 return begin;
101 }
102
103 template <typename Iter> void fixNumericLocaleInput(Iter begin, Iter end) {
104 char decimalPoint = getDecimalPoint();
105 if (decimalPoint == '\0' || decimalPoint == '.') {
106 return;
107 }
108 for (; begin != end; ++begin) {
109 if (*begin == '.') {
110 *begin = decimalPoint;
111 }
112 }
113 }
114
119 template <typename Iter> Iter fixZerosInTheEnd(Iter begin, Iter end) {
120 for (; begin != end; --end) {
121 if (*(end - 1) != '0') {
122 return end;
123 }
124 // Don't delete the last zero before the decimal point.
125 if (begin != (end - 1) && *(end - 2) == '.') {
126 return end;
127 }
128 }
129 return end;
130 }
131
132 } // namespace Json
133
134 #endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
Json::LargestUInt
UInt64 LargestUInt
Definition: config.h:154
Json::uintToString
static void uintToString(LargestUInt value, char *&current)
Converts an unsigned integer to string.
Definition: json_tool.h:81
Json::codePointToUTF8
static String codePointToUTF8(unsigned int cp)
Converts a unicode code-point to UTF-8.
Definition: json_tool.h:39
Json::fixNumericLocale
Iter fixNumericLocale(Iter begin, Iter end)
Change ',' to '.
Definition: json_tool.h:94
Json::UIntToStringBuffer
char UIntToStringBuffer[uintToStringBufferSize]
Definition: json_tool.h:74
Json::fixNumericLocaleInput
void fixNumericLocaleInput(Iter begin, Iter end)
Definition: json_tool.h:103
Json::getDecimalPoint
static char getDecimalPoint()
Definition: json_tool.h:29
Json::uintToStringBufferSize
@ uintToStringBufferSize
Constant that specify the size of the buffer that must be passed to uintToString.
Definition: json_tool.h:70
Json
JSON (JavaScript Object Notation).
Definition: allocator.h:14
Json::String
std::basic_string< char, std::char_traits< char >, Allocator< char > > String
Definition: config.h:162
config.h
Json::fixZerosInTheEnd
Iter fixZerosInTheEnd(Iter begin, Iter end)
Return iterator that would be the new end of the range [begin,end), if we were to delete zeros in the...
Definition: json_tool.h:119