JsonCpp project page | Classes | Namespace | JsonCpp home page

json_tool.h
Go to the documentation of this file.
// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
// Distributed under MIT license, or public domain if desired and
// recognized in your jurisdiction.
// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
#ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED
#define LIB_JSONCPP_JSON_TOOL_H_INCLUDED
#if !defined(JSON_IS_AMALGAMATION)
#include <json/config.h>
#endif
// Also support old flag NO_LOCALE_SUPPORT
#ifdef NO_LOCALE_SUPPORT
#define JSONCPP_NO_LOCALE_SUPPORT
#endif
#ifndef JSONCPP_NO_LOCALE_SUPPORT
#include <clocale>
#endif
/* This header provides common string manipulation support, such as UTF-8,
* portable conversion from/to string...
*
* It is an internal header that must not be exposed.
*/
namespace Json {
static inline char getDecimalPoint() {
#ifdef JSONCPP_NO_LOCALE_SUPPORT
return '\0';
#else
struct lconv* lc = localeconv();
return lc ? *(lc->decimal_point) : '\0';
#endif
}
static inline String codePointToUTF8(unsigned int cp) {
String result;
// based on description from http://en.wikipedia.org/wiki/UTF-8
if (cp <= 0x7f) {
result.resize(1);
result[0] = static_cast<char>(cp);
} else if (cp <= 0x7FF) {
result.resize(2);
result[1] = static_cast<char>(0x80 | (0x3f & cp));
result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
} else if (cp <= 0xFFFF) {
result.resize(3);
result[2] = static_cast<char>(0x80 | (0x3f & cp));
result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
result[0] = static_cast<char>(0xE0 | (0xf & (cp >> 12)));
} else if (cp <= 0x10FFFF) {
result.resize(4);
result[3] = static_cast<char>(0x80 | (0x3f & cp));
result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
}
return result;
}
enum {
uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1
};
// Defines a char buffer for use with uintToString().
using UIntToStringBuffer = char[uintToStringBufferSize];
static inline void uintToString(LargestUInt value, char*& current) {
*--current = 0;
do {
*--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
value /= 10;
} while (value != 0);
}
template <typename Iter> Iter fixNumericLocale(Iter begin, Iter end) {
for (; begin != end; ++begin) {
if (*begin == ',') {
*begin = '.';
}
}
return begin;
}
template <typename Iter> void fixNumericLocaleInput(Iter begin, Iter end) {
char decimalPoint = getDecimalPoint();
if (decimalPoint == '\0' || decimalPoint == '.') {
return;
}
for (; begin != end; ++begin) {
if (*begin == '.') {
*begin = decimalPoint;
}
}
}
template <typename Iter>
Iter fixZerosInTheEnd(Iter begin, Iter end, unsigned int precision) {
for (; begin != end; --end) {
if (*(end - 1) != '0') {
return end;
}
// Don't delete the last zero before the decimal point.
if (begin != (end - 1) && begin != (end - 2) && *(end - 2) == '.') {
if (precision) {
return end;
}
return end - 2;
}
}
return end;
}
} // namespace Json
#endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
config.h
Json
JSON (JavaScript Object Notation).
Definition allocator.h:16
Json::fixNumericLocale
Iter fixNumericLocale(Iter begin, Iter end)
Change ',' to '.
Definition json_tool.h:94
Json::uintToStringBufferSize
@ uintToStringBufferSize
Constant that specify the size of the buffer that must be passed to uintToString.
Definition json_tool.h:70
Json::codePointToUTF8
static String codePointToUTF8(unsigned int cp)
Converts a unicode code-point to UTF-8.
Definition json_tool.h:39
Json::fixZerosInTheEnd
Iter fixZerosInTheEnd(Iter begin, Iter end, unsigned int precision)
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:120
Json::String
std::basic_string< char, std::char_traits< char >, Allocator< char > > String
Definition config.h:135
Json::UIntToStringBuffer
char[uintToStringBufferSize] UIntToStringBuffer
Definition json_tool.h:74
Json::uintToString
static void uintToString(LargestUInt value, char *&current)
Converts an unsigned integer to string.
Definition json_tool.h:81
Json::getDecimalPoint
static char getDecimalPoint()
Definition json_tool.h:29
Json::LargestUInt
UInt64 LargestUInt
Definition config.h:125
Json::fixNumericLocaleInput
void fixNumericLocaleInput(Iter begin, Iter end)
Definition json_tool.h:103