UTF16< CharType > Struct Template Reference

UTF-16 encoding. More...

#include <encodings.h>

Public Types
enum	{ supportUnicode = 1 }
typedef CharType	Ch

Public Member Functions
	RAPIDJSON_STATIC_ASSERT (sizeof(Ch) >=2)

Static Public Member Functions
template<typename OutputStream >
static void	Encode (OutputStream &os, unsigned codepoint)
template<typename InputStream >
static bool	Decode (InputStream &is, unsigned *codepoint)
template<typename InputStream , typename OutputStream >
static bool	Validate (InputStream &is, OutputStream &os)

Detailed Description

template<typename CharType = wchar_t>
struct UTF16< CharType >

UTF-16 encoding.

http://en.wikipedia.org/wiki/UTF-16 http://tools.ietf.org/html/rfc2781

Template Parameters

CharType

Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead.

Note

implements Encoding concept

For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness. For streaming, use UTF16LE and UTF16BE, which handle endianness.

Member Typedef Documentation

template<typename CharType = wchar_t>

typedef CharType UTF16< CharType >::Ch

Member Enumeration Documentation

template<typename CharType = wchar_t>

anonymous enum

Enumerator
supportUnicode

{ supportUnicode = 1 };

Member Function Documentation

template<typename CharType = wchar_t>

template<typename InputStream >

static bool UTF16< CharType >::Decode ( InputStream &  is, unsigned *  codepoint  )

inlinestatic

 {
 RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
 Ch c = is.Take();
 if (c < 0xD800 || c > 0xDFFF) {
 *codepoint = c;
 return true;
 }
 else if (c <= 0xDBFF) {
 *codepoint = (c & 0x3FF) << 10;
 c = is.Take();
 *codepoint |= (c & 0x3FF);
 *codepoint += 0x10000;
 return c >= 0xDC00 && c <= 0xDFFF;
 }
 return false;
 }

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template<typename CharType = wchar_t>

template<typename OutputStream >

static void UTF16< CharType >::Encode ( OutputStream &  os, unsigned  codepoint  )

inlinestatic

 {
 RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
 if (codepoint <= 0xFFFF) {
 RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair 
 os.Put(static_cast<typename OutputStream::Ch>(codepoint));
 }
 else {
 RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
 unsigned v = codepoint - 0x10000;
 os.Put(static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800));
 os.Put((v & 0x3FF) | 0xDC00);
 }
 }

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template<typename CharType = wchar_t>

UTF16< CharType >::RAPIDJSON_STATIC_ASSERT

(

sizeof(Ch) >=

2

)

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template<typename CharType = wchar_t>

template<typename InputStream , typename OutputStream >

static bool UTF16< CharType >::Validate ( InputStream &  is, OutputStream &  os  )

inlinestatic

 {
 RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
 RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
 Ch c;
 os.Put(c = is.Take());
 if (c < 0xD800 || c > 0xDFFF)
 return true;
 else if (c <= 0xDBFF) {
 os.Put(c = is.Take());
 return c >= 0xDC00 && c <= 0xDFFF;
 }
 return false;
 }

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The documentation for this struct was generated from the following file:

• dep/rapidjson/rapidjson/encodings.h