source/code/Libs/include/cereal/external/rapidjson/writer.h
browsing at commit = a2b1cba8621a0fe134da11511c70beac3c80d9fb
#ifndef RAPIDJSON_WRITER_H_
#define RAPIDJSON_WRITER_H_
#include "rapidjson.h"
#include "internal/stack.h"
#include "internal/strfunc.h"
#include <cstdio> // snprintf() or _sprintf_s()
#include <new> // placement new
#include <limits>
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4127) // conditional expression is constant
#endif
namespace rapidjson {
//! JSON writer
/*! Writer implements the concept Handler.
It generates JSON text by events to an output stream.
User may programmatically calls the functions of a writer to generate JSON text.
On the other side, a writer can also be passed to objects that generates events,
for example Reader::Parse() and Document::Accept().
\tparam Stream Type of ouptut stream.
\tparam Encoding Encoding of both source strings and output.
\implements Handler
*/
template<typename Stream, typename Encoding = UTF8<>, typename Allocator = MemoryPoolAllocator<> >
class Writer {
public:
typedef typename Encoding::Ch Ch;
Writer(Stream& stream, int precision = 20, Allocator* allocator = 0, size_t levelDepth = kDefaultLevelDepth) :
stream_(stream), level_stack_(allocator, levelDepth * sizeof(Level))
{
#if _MSC_VER
(void) sprintf_s(double_format, sizeof(double_format), "%%0.%dg", precision);
(void) sprintf_s( long_double_format, sizeof( long_double_format ), "%%0.%dLg", precision );
#else
(void) snprintf(double_format, sizeof(double_format), "%%0.%dg", precision);
(void) snprintf( long_double_format, sizeof( long_double_format ), "%%0.%dLg", precision );
#endif
}
protected:
char double_format[32];
char long_double_format[32];
public:
//@name Implementation of Handler
//@{
Writer& Null_() { Prefix(kNull_Type); WriteNull_(); return *this; }
Writer& Bool_(bool b) { Prefix(b ? kTrueType : kFalseType); WriteBool_(b); return *this; }
Writer& Int(int i) { Prefix(kNumberType); WriteInt(i); return *this; }
Writer& Uint(unsigned u) { Prefix(kNumberType); WriteUint(u); return *this; }
Writer& Int64(int64_t i64) { Prefix(kNumberType); WriteInt64(i64); return *this; }
Writer& Uint64(uint64_t u64) { Prefix(kNumberType); WriteUint64(u64); return *this; }
Writer& Double(double d) { Prefix(kNumberType); WriteDouble(d); return *this; }
Writer& LongDouble(long double d) { Prefix(kNumberType); WriteLongDouble(d); return *this; }
Writer& LongLong(long long d) { Prefix(kNumberType); WriteLongLong(d); return *this; }
Writer& ULongLong(unsigned long long d) { Prefix(kNumberType); WriteULongLong(d); return *this; }
Writer& String(const Ch* str, SizeType length, bool copy = false) {
(void)copy;
Prefix(kStringType);
WriteString(str, length);
return *this;
}
Writer& StartObject() {
Prefix(kObjectType);
new (level_stack_.template Push<Level>()) Level(false);
WriteStartObject();
return *this;
}
Writer& EndObject(SizeType memberCount = 0) {
(void)memberCount;
RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
RAPIDJSON_ASSERT(!level_stack_.template Top<Level>()->inArray);
level_stack_.template Pop<Level>(1);
WriteEndObject();
return *this;
}
Writer& StartArray() {
Prefix(kArrayType);
new (level_stack_.template Push<Level>()) Level(true);
WriteStartArray();
return *this;
}
Writer& EndArray(SizeType elementCount = 0) {
(void)elementCount;
RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
RAPIDJSON_ASSERT(level_stack_.template Top<Level>()->inArray);
level_stack_.template Pop<Level>(1);
WriteEndArray();
return *this;
}
//@}
//! Simpler but slower overload.
Writer& String(const Ch* str) { return String(str, internal::StrLen(str)); }
protected:
//! Information for each nested level
struct Level {
Level(bool inArray_) : inArray(inArray_), valueCount(0) {}
bool inArray; //!< true if in array, otherwise in object
size_t valueCount; //!< number of values in this level
};
static const size_t kDefaultLevelDepth = 32;
void WriteNull_() {
stream_.Put('n'); stream_.Put('u'); stream_.Put('l'); stream_.Put('l');
}
void WriteBool_(bool b) {
if (b) {
stream_.Put('t'); stream_.Put('r'); stream_.Put('u'); stream_.Put('e');
}
else {
stream_.Put('f'); stream_.Put('a'); stream_.Put('l'); stream_.Put('s'); stream_.Put('e');
}
}
void WriteInt(int i) {
if (i < 0) {
stream_.Put('-');
i = -i;
}
WriteUint((unsigned)i);
}
void WriteUint(unsigned u) {
char buffer[10];
char *p = buffer;
do {
*p++ = (u % 10) + '0';
u /= 10;
} while (u > 0);
do {
--p;
stream_.Put(*p);
} while (p != buffer);
}
void WriteInt64(int64_t i64) {
if (i64 < 0) {
stream_.Put('-');
i64 = -i64;
}
WriteUint64((uint64_t)i64);
}
void WriteUint64(uint64_t u64) {
char buffer[20];
char *p = buffer;
do {
*p++ = char(u64 % 10) + '0';
u64 /= 10;
} while (u64 > 0);
do {
--p;
stream_.Put(*p);
} while (p != buffer);
}
// cereal Temporary until constexpr support is added in RTM
#ifdef _MSC_VER
template <class Ch>
bool characterOk( Ch c )
{
return c < 256;
}
template <>
bool characterOk<char>( char )
{
return true;
}
#else
// As part of a fix for GCC 4.7
template <class T>
static constexpr int to_int( T t ){ return t; }
template<class Ch>
typename std::enable_if < to_int(std::numeric_limits<Ch>::max()) < to_int(256), bool>::type
characterOk( Ch )
{
return true;
}
template<class Ch>
typename std::enable_if< to_int(std::numeric_limits<Ch>::max()) >= to_int(256), bool>::type
characterOk(Ch c)
{ return c < 256; }
#endif
//! \todo Optimization with custom double-to-string converter.
void WriteDouble(double d) {
char buffer[100];
#if _MSC_VER
int ret = sprintf_s(buffer, sizeof(buffer), double_format, d);
#else
int ret = snprintf(buffer, sizeof(buffer), double_format, d);
#endif
RAPIDJSON_ASSERT(ret >= 1);
for (int i = 0; i < ret; i++)
stream_.Put(buffer[i]);
}
void WriteLongDouble(long double d) {
char buffer[256];
#if _MSC_VER
int ret = sprintf_s(buffer, sizeof(buffer), long_double_format, d);
#else
int ret = snprintf(buffer, sizeof(buffer), long_double_format, d);
#endif
RAPIDJSON_ASSERT(ret >= 1);
for (int i = 0; i < ret; i++)
stream_.Put(buffer[i]);
}
void WriteLongLong(long long d) {
char buffer[256];
#if _MSC_VER
int ret = sprintf_s(buffer, sizeof(buffer), "%lld", d);
#else
int ret = snprintf(buffer, sizeof(buffer), "%lld", d);
#endif
RAPIDJSON_ASSERT(ret >= 1);
for (int i = 0; i < ret; i++)
stream_.Put(buffer[i]);
}
void WriteULongLong(unsigned long long d) {
char buffer[256];
#if _MSC_VER
int ret = sprintf_s(buffer, sizeof(buffer), "%llu", d);
#else
int ret = snprintf(buffer, sizeof(buffer), "%llu", d);
#endif
RAPIDJSON_ASSERT(ret >= 1);
for (int i = 0; i < ret; i++)
stream_.Put(buffer[i]);
}
void WriteString(const Ch* str, SizeType length) {
static const char hexDigits[] = "0123456789ABCDEF";
static const char escape[256] = {
#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
//0 1 2 3 4 5 6 7 8 9 A B C D E F
'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'b', 't', 'n', 'u', 'f', 'r', 'u', 'u', // 00
'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', // 10
0, 0, '"', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20
Z16, Z16, // 30~4F
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0, // 50
Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16 // 60~FF
#undef Z16
};
stream_.Put('\"');
for (const Ch* p = str; p != str + length; ++p) {
if ((sizeof(Ch) == 1 || characterOk(*p)) && escape[(unsigned char)*p]) {
//if ((sizeof(Ch) == 1 || *p < 256) && escape[(unsigned char)*p]) {
stream_.Put('\\');
stream_.Put(escape[(unsigned char)*p]);
if (escape[(unsigned char)*p] == 'u') {
stream_.Put('0');
stream_.Put('0');
stream_.Put(hexDigits[(*p) >> 4]);
stream_.Put(hexDigits[(*p) & 0xF]);
}
}
else
stream_.Put(*p);
}
stream_.Put('\"');
}
void WriteStartObject() { stream_.Put('{'); }
void WriteEndObject() { stream_.Put('}'); }
void WriteStartArray() { stream_.Put('['); }
void WriteEndArray() { stream_.Put(']'); }
void Prefix(Type type) {
(void)type;
if (level_stack_.GetSize() != 0) { // this value is not at root
Level* level = level_stack_.template Top<Level>();
if (level->valueCount > 0) {
if (level->inArray)
stream_.Put(','); // add comma if it is not the first element in array
else // in object
stream_.Put((level->valueCount % 2 == 0) ? ',' : ':');
}
if (!level->inArray && level->valueCount % 2 == 0)
RAPIDJSON_ASSERT(type == kStringType); // if it's in object, then even number should be a name
level->valueCount++;
}
else
RAPIDJSON_ASSERT(type == kObjectType || type == kArrayType);
}
Stream& stream_;
internal::Stack<Allocator> level_stack_;
private:
// Prohibit assignment for VC C4512 warning
Writer& operator=(const Writer& w);
};
} // namespace rapidjson
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // RAPIDJSON_RAPIDJSON_H_