dart::JSONWriter Class Reference

#include <json_writer.h>

Inheritance diagram for dart::JSONWriter:

Public Member Functions
	JSONWriter (intptr_t buf_size=256)
TextBuffer *	buffer ()
const char *	ToCString ()
void	Steal (char **buffer, intptr_t *buffer_length)
void	PrintCommaIfNeeded ()
void	AppendBytes (const uint8_t *buffer, intptr_t buffer_length)
void	AppendBytesInBase64 (const uint8_t *bytes, intptr_t length)
void	AppendSerializedObject (const char *serialized_object)
void	AppendSerializedObject (const char *property_name, const char *serialized_object)
void	OpenObject (const char *property_name=nullptr)
void	CloseObject ()
void	UncloseObject ()
void	OpenArray (const char *property_name=nullptr)
void	CloseArray ()
void	Clear ()
void	PrintValueNull ()
void	PrintValueBool (bool b)
void	PrintValue (intptr_t i)
void	PrintValue64 (int64_t i)
void	PrintValue (double d)
void	PrintValueBase64 (const uint8_t *bytes, intptr_t length)
void	PrintValue (const char *s)
void	PrintValue (const char *s, intptr_t len)
void	PrintValueNoEscape (const char *s)
void	PrintfValue (const char *format,...) PRINTF_ATTRIBUTE(2
void void	VPrintfValue (const char *format, va_list args)
bool	PrintValueStr (const String &s, intptr_t offset, intptr_t count)
void	PrintPropertyBool (const char *name, bool b)
void	PrintProperty (const char *name, intptr_t i)
void	PrintProperty64 (const char *name, int64_t i)
void	PrintProperty (const char *name, double d)
void	PrintPropertyBase64 (const char *name, const uint8_t *bytes, intptr_t length)
void	PrintProperty (const char *name, const char *s)
bool	PrintPropertyStr (const char *name, const String &s, intptr_t offset=0, intptr_t count=-1)
void	PrintPropertyNoEscape (const char *name, const char *s)
void	PrintfProperty (const char *name, const char *format,...) PRINTF_ATTRIBUTE(3
void void	VPrintfProperty (const char *name, const char *format, va_list args)
void	PrintPropertyName (const char *name)
void	PrintNewline ()
void	AddEscapedUTF8String (const char *s)
void	AddEscapedUTF8String (const char *s, intptr_t len)

Detailed Description

Definition at line 15 of file json_writer.h.

Constructor & Destructor Documentation

JSONWriter()

dart::JSONWriter::JSONWriter ( intptr_t  buf_size = 256 )

explicit

Definition at line 35 of file json_writer.cc.

    : open_objects_(0), buffer_(buf_size) {}

Member Function Documentation

AddEscapedUTF8String() [1/2]

void dart::JSONWriter::AddEscapedUTF8String

(

const char *

s

)

Definition at line 348 of file json_writer.cc.

                                                   {
  if (s == nullptr) {
    return;
  }
  intptr_t len = strlen(s);
  AddEscapedUTF8String(s, len);
}

AddEscapedUTF8String() [2/2]

void dart::JSONWriter::AddEscapedUTF8String	(	const char *	s,
		intptr_t	len
	)

Definition at line 356 of file json_writer.cc.

                                                                 {
  if (s == nullptr) {
    return;
  }
  buffer_.AddEscapedUTF8(s, len);
}

AppendBytes()

void dart::JSONWriter::AppendBytes	(	const uint8_t *	buffer,
		intptr_t	buffer_length
	)

Definition at line 38 of file json_writer.cc.

                                                                          {
  buffer_.AddRaw(buffer, buffer_length);
}

AppendBytesInBase64()

void dart::JSONWriter::AppendBytesInBase64	(	const uint8_t *	bytes,
		intptr_t	length
	)

Definition at line 46 of file json_writer.cc.

                                                                          {
  ASSERT(bytes != nullptr);
  intptr_t odd_bits = length % 3;
  intptr_t even_bits = length - odd_bits;
  for (intptr_t i = 0; i < even_bits; i += 3) {
    intptr_t triplet = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
    buffer_.AddChar(base64_digits[triplet >> 18]);
    buffer_.AddChar(base64_digits[(triplet >> 12) & 63]);
    buffer_.AddChar(base64_digits[(triplet >> 6) & 63]);
    buffer_.AddChar(base64_digits[triplet & 63]);
  }
  if (odd_bits == 1) {
    intptr_t triplet = bytes[even_bits] << 16;
    buffer_.AddChar(base64_digits[triplet >> 18]);
    buffer_.AddChar(base64_digits[(triplet >> 12) & 63]);
    buffer_.AddChar(base64_pad);
    buffer_.AddChar(base64_pad);
  } else if (odd_bits == 2) {
    intptr_t triplet = (bytes[even_bits] << 16) | (bytes[even_bits + 1] << 8);
    buffer_.AddChar(base64_digits[triplet >> 18]);
    buffer_.AddChar(base64_digits[(triplet >> 12) & 63]);
    buffer_.AddChar(base64_digits[(triplet >> 6) & 63]);
    buffer_.AddChar(base64_pad);
  }
}

AppendSerializedObject() [1/2]

void dart::JSONWriter::AppendSerializedObject	(	const char *	property_name,
		const char *	serialized_object
	)

Definition at line 77 of file json_writer.cc.

                                                                       {
  PrintCommaIfNeeded();
  PrintPropertyName(property_name);
  buffer_.AddString(serialized_object);
}

AppendSerializedObject() [2/2]

void dart::JSONWriter::AppendSerializedObject

(

const char *

serialized_object

)

Definition at line 72 of file json_writer.cc.

                                                                     {
  PrintCommaIfNeeded();
  buffer_.AddString(serialized_object);
}

buffer()

TextBuffer * dart::JSONWriter::buffer ( )

inline

Definition at line 19 of file json_writer.h.

{ return &buffer_; }

Clear()

void dart::JSONWriter::Clear

(

)

Definition at line 84 of file json_writer.cc.

                       {
  buffer_.Clear();
  open_objects_ = 0;
}

CloseArray()

void dart::JSONWriter::CloseArray

(

)

Definition at line 121 of file json_writer.cc.

                            {
  ASSERT(open_objects_ > 0);
  open_objects_--;
  buffer_.AddChar(']');
}

CloseObject()

void dart::JSONWriter::CloseObject

(

)

Definition at line 106 of file json_writer.cc.

                             {
  ASSERT(open_objects_ > 0);
  open_objects_--;
  buffer_.AddChar('}');
}

OpenArray()

void dart::JSONWriter::OpenArray

(

const char *

property_name = nullptr

)

Definition at line 112 of file json_writer.cc.

                                                    {
  PrintCommaIfNeeded();
  if (property_name != nullptr) {
    PrintPropertyName(property_name);
  }
  open_objects_++;
  buffer_.AddChar('[');
}

OpenObject()

void dart::JSONWriter::OpenObject

(

const char *

property_name = nullptr

)

Definition at line 89 of file json_writer.cc.

                                                     {
  PrintCommaIfNeeded();
  open_objects_++;
  if (property_name != nullptr) {
    PrintPropertyName(property_name);
  }
  buffer_.AddChar('{');
}

PrintCommaIfNeeded()

void dart::JSONWriter::PrintCommaIfNeeded

(

)

Definition at line 320 of file json_writer.cc.

                                    {
  if (NeedComma()) {
    buffer_.AddChar(',');
  }
}

PrintfProperty()

void dart::JSONWriter::PrintfProperty	(	const char *	name,
		const char *	format,
			...
	)

Definition at line 269 of file json_writer.cc.

                                                                         {
  va_list args;
  va_start(args, format);
  VPrintfProperty(name, format, args);
  va_end(args);
}

PrintfValue()

void dart::JSONWriter::PrintfValue	(	const char *	format,
			...
	)

Definition at line 195 of file json_writer.cc.

                                                    {
  va_list args;
  va_start(args, format);
  VPrintfValue(format, args);
  va_end(args);
}

PrintNewline()

void dart::JSONWriter::PrintNewline

(

)

Definition at line 316 of file json_writer.cc.

                              {
  buffer_.AddChar('\n');
}

PrintProperty() [1/3]

void dart::JSONWriter::PrintProperty	(	const char *	name,
		const char *	s
	)

Definition at line 244 of file json_writer.cc.

                                                              {
  PrintPropertyName(name);
  PrintValue(s);
}

PrintProperty() [2/3]

void dart::JSONWriter::PrintProperty	(	const char *	name,
		double	d
	)

Definition at line 239 of file json_writer.cc.

                                                         {
  PrintPropertyName(name);
  PrintValue(d);
}

PrintProperty() [3/3]

void dart::JSONWriter::PrintProperty	(	const char *	name,
		intptr_t	i
	)

Definition at line 229 of file json_writer.cc.

                                                           {
  PrintPropertyName(name);
  PrintValue(i);
}

PrintProperty64()

void dart::JSONWriter::PrintProperty64	(	const char *	name,
		int64_t	i
	)

Definition at line 234 of file json_writer.cc.

                                                            {
  PrintPropertyName(name);
  PrintValue64(i);
}

PrintPropertyBase64()

void dart::JSONWriter::PrintPropertyBase64	(	const char *	name,
		const uint8_t *	bytes,
		intptr_t	length
	)

Definition at line 249 of file json_writer.cc.

                                                   {
  PrintPropertyName(name);
  PrintValueBase64(b, len);
}

PrintPropertyBool()

void dart::JSONWriter::PrintPropertyBool	(	const char *	name,
		bool	b
	)

Definition at line 224 of file json_writer.cc.

                                                           {
  PrintPropertyName(name);
  PrintValueBool(b);
}

PrintPropertyName()

void dart::JSONWriter::PrintPropertyName

(

const char *

name

)

Definition at line 307 of file json_writer.cc.

                                                   {
  ASSERT(name != nullptr);
  PrintCommaIfNeeded();
  buffer_.AddChar('"');
  AddEscapedUTF8String(name);
  buffer_.AddChar('"');
  buffer_.AddChar(':');
}

PrintPropertyNoEscape()

void dart::JSONWriter::PrintPropertyNoEscape	(	const char *	name,
		const char *	s
	)

Definition at line 264 of file json_writer.cc.

                                                                      {
  PrintPropertyName(name);
  PrintValueNoEscape(s);
}

PrintPropertyStr()

bool dart::JSONWriter::PrintPropertyStr	(	const char *	name,
		const String &	s,
		intptr_t	offset = 0,
		intptr_t	count = -1
	)

Definition at line 256 of file json_writer.cc.

                                                  {
  PrintPropertyName(name);
  return PrintValueStr(s, offset, count);
}

PrintValue() [1/4]

void dart::JSONWriter::PrintValue

(

const char *

s

)

Definition at line 166 of file json_writer.cc.

                                         {
  PrintCommaIfNeeded();
  buffer_.AddChar('"');
  AddEscapedUTF8String(s);
  buffer_.AddChar('"');
}

PrintValue() [2/4]

void dart::JSONWriter::PrintValue	(	const char *	s,
		intptr_t	len
	)

Definition at line 173 of file json_writer.cc.

                                                     {
  PrintCommaIfNeeded();
  buffer_.AddChar('"');
  AddEscapedUTF8String(s, i);
  buffer_.AddChar('"');
}

PrintValue() [3/4]

void dart::JSONWriter::PrintValue

(

double

d

)

Definition at line 149 of file json_writer.cc.

                                    {
  // Max length of a double in characters (including \0).
  // See double_conversion.cc.
  const size_t kBufferLen = 25;
  char buffer[kBufferLen];
  DoubleToCString(d, buffer, kBufferLen);
  PrintCommaIfNeeded();
  buffer_.Printf("%s", buffer);
}

PrintValue() [4/4]

void dart::JSONWriter::PrintValue

(

intptr_t

i

)

Definition at line 137 of file json_writer.cc.

                                      {
  EnsureIntegerIsRepresentableInJavaScript(static_cast<int64_t>(i));
  PrintCommaIfNeeded();
  buffer_.Printf("%" Pd "", i);
}

PrintValue64()

void dart::JSONWriter::PrintValue64

(

int64_t

i

)

Definition at line 143 of file json_writer.cc.

                                       {
  EnsureIntegerIsRepresentableInJavaScript(i);
  PrintCommaIfNeeded();
  buffer_.Printf("%" Pd64 "", i);
}

PrintValueBase64()

void dart::JSONWriter::PrintValueBase64	(	const uint8_t *	bytes,
		intptr_t	length
	)

Definition at line 159 of file json_writer.cc.

                                                                       {
  PrintCommaIfNeeded();
  buffer_.AddChar('"');
  AppendBytesInBase64(bytes, length);
  buffer_.AddChar('"');
}

PrintValueBool()

void dart::JSONWriter::PrintValueBool

(

bool

b

)

Definition at line 132 of file json_writer.cc.

                                      {
  PrintCommaIfNeeded();
  buffer_.Printf("%s", b ? "true" : "false");
}

PrintValueNoEscape()

void dart::JSONWriter::PrintValueNoEscape

(

const char *

s

)

Definition at line 190 of file json_writer.cc.

                                                 {
  PrintCommaIfNeeded();
  buffer_.Printf("%s", s);
}

PrintValueNull()

void dart::JSONWriter::PrintValueNull

(

)

Definition at line 127 of file json_writer.cc.

                                {
  PrintCommaIfNeeded();
  buffer_.Printf("null");
}

PrintValueStr()

bool dart::JSONWriter::PrintValueStr	(	const String &	s,
		intptr_t	offset,
		intptr_t	count
	)

Definition at line 180 of file json_writer.cc.

                                               {
  PrintCommaIfNeeded();
  buffer_.AddChar('"');
  bool did_truncate = AddDartString(s, offset, count);
  buffer_.AddChar('"');
  return did_truncate;
}

Steal()

void dart::JSONWriter::Steal	(	char **	buffer,
		intptr_t *	buffer_length
	)

Definition at line 300 of file json_writer.cc.

                                                             {
  ASSERT(buffer != nullptr);
  ASSERT(buffer_length != nullptr);
  *buffer_length = buffer_.length();
  *buffer = buffer_.Steal();
}

ToCString()

const char * dart::JSONWriter::ToCString ( )

inline

Definition at line 20 of file json_writer.h.

{ return buffer_.buffer(); }

UncloseObject()

void dart::JSONWriter::UncloseObject

(

)

Definition at line 98 of file json_writer.cc.

                               {
  intptr_t len = buffer_.length();
  ASSERT(len > 0);
  ASSERT(buffer_.buffer()[len - 1] == '}');
  open_objects_++;
  buffer_.set_length(len - 1);
}

VPrintfProperty()

void dart::JSONWriter::VPrintfProperty	(	const char *	name,
		const char *	format,
		va_list	args
	)

Definition at line 276 of file json_writer.cc.

                                               {
  PrintPropertyName(name);
 
  va_list measure_args;
  va_copy(measure_args, args);
  intptr_t len = Utils::VSNPrint(nullptr, 0, format, measure_args);
  va_end(measure_args);
 
  MaybeOnStackBuffer mosb(len + 1);
  char* p = mosb.p();
 
  va_list print_args;
  va_copy(print_args, args);
  intptr_t len2 = Utils::VSNPrint(p, len + 1, format, print_args);
  va_end(print_args);
  ASSERT(len == len2);
 
  buffer_.AddChar('"');
  AddEscapedUTF8String(p, len);
  buffer_.AddChar('"');
}

VPrintfValue()

void dart::JSONWriter::VPrintfValue	(	const char *	format,
		va_list	args
	)

Definition at line 202 of file json_writer.cc.

                                                              {
  PrintCommaIfNeeded();
 
  va_list measure_args;
  va_copy(measure_args, args);
  intptr_t len = Utils::VSNPrint(nullptr, 0, format, measure_args);
  va_end(measure_args);
 
  MaybeOnStackBuffer mosb(len + 1);
  char* p = mosb.p();
 
  va_list print_args;
  va_copy(print_args, args);
  intptr_t len2 = Utils::VSNPrint(p, len + 1, format, print_args);
  va_end(print_args);
  ASSERT(len == len2);
 
  buffer_.AddChar('"');
  AddEscapedUTF8String(p, len);
  buffer_.AddChar('"');
}

---

The documentation for this class was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/json_writer.h
• third_party/dart-lang/sdk/runtime/vm/json_writer.cc