//
// MessagePack for C++ deserializing routine
//
// Copyright (C) 2016-2017 KONDO Takatoshi
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef MSGPACK_V2_PARSE_HPP
#define MSGPACK_V2_PARSE_HPP
#if MSGPACK_DEFAULT_API_VERSION >= 2
#include <cstddef>
#include "msgpack/unpack_define.h"
#include "msgpack/parse_return.hpp"
#include "msgpack/unpack_exception.hpp"
#include "msgpack/unpack_decl.hpp"
namespace msgpack {
/// @cond
MSGPACK_API_VERSION_NAMESPACE(v2) {
/// @endcond
namespace detail {
using v1::detail::fix_tag;
using v1::detail::value;
using v1::detail::load;
template <typename VisitorHolder>
class context {
public:
context()
:m_trail(0), m_cs(MSGPACK_CS_HEADER)
{
}
void init()
{
m_cs = MSGPACK_CS_HEADER;
m_trail = 0;
m_stack.clear();
holder().visitor().init();
}
parse_return execute(const char* data, std::size_t len, std::size_t& off);
private:
template <typename T>
static uint32_t next_cs(T p)
{
return static_cast<uint32_t>(*p) & 0x1f;
}
VisitorHolder& holder() {
return static_cast<VisitorHolder&>(*this);
}
template <typename T, typename StartVisitor, typename EndVisitor>
parse_return start_aggregate(
StartVisitor const& sv,
EndVisitor const& ev,
const char* load_pos,
std::size_t& off) {
typename value<T>::type size;
load<T>(size, load_pos);
++m_current;
if (size == 0) {
if (!sv(size)) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_STOP_VISITOR;
}
if (!ev()) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_STOP_VISITOR;
}
parse_return ret = m_stack.consume(holder());
if (ret != PARSE_CONTINUE) {
off = static_cast<std::size_t>(m_current - m_start);
return ret;
}
}
else {
if (!sv(size)) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_STOP_VISITOR;
}
parse_return ret = m_stack.push(holder(), sv.type(), static_cast<uint32_t>(size));
if (ret != PARSE_CONTINUE) {
off = static_cast<std::size_t>(m_current - m_start);
return ret;
}
}
m_cs = MSGPACK_CS_HEADER;
return PARSE_CONTINUE;
}
parse_return after_visit_proc(bool visit_result, std::size_t& off) {
++m_current;
if (!visit_result) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_STOP_VISITOR;
}
parse_return ret = m_stack.consume(holder());
if (ret != PARSE_CONTINUE) {
off = static_cast<std::size_t>(m_current - m_start);
}
m_cs = MSGPACK_CS_HEADER;
return ret;
}
struct array_sv {
array_sv(VisitorHolder& visitor_holder):m_visitor_holder(visitor_holder) {}
bool operator()(uint32_t size) const {
return m_visitor_holder.visitor().start_array(size);
}
msgpack_container_type type() const { return MSGPACK_CT_ARRAY_ITEM; }
private:
VisitorHolder& m_visitor_holder;
};
struct array_ev {
array_ev(VisitorHolder& visitor_holder):m_visitor_holder(visitor_holder) {}
bool operator()() const {
return m_visitor_holder.visitor().end_array();
}
private:
VisitorHolder& m_visitor_holder;
};
struct map_sv {
map_sv(VisitorHolder& visitor_holder):m_visitor_holder(visitor_holder) {}
bool operator()(uint32_t size) const {
return m_visitor_holder.visitor().start_map(size);
}
msgpack_container_type type() const { return MSGPACK_CT_MAP_KEY; }
private:
VisitorHolder& m_visitor_holder;
};
struct map_ev {
map_ev(VisitorHolder& visitor_holder):m_visitor_holder(visitor_holder) {}
bool operator()() const {
return m_visitor_holder.visitor().end_map();
}
private:
VisitorHolder& m_visitor_holder;
};
struct unpack_stack {
struct stack_elem {
stack_elem(msgpack_container_type type, uint32_t rest):m_type(type), m_rest(rest) {}
msgpack_container_type m_type;
uint32_t m_rest;
};
unpack_stack() {
m_stack.reserve(MSGPACK_EMBED_STACK_SIZE);
}
parse_return push(VisitorHolder& visitor_holder, msgpack_container_type type, uint32_t rest) {
m_stack.push_back(stack_elem(type, rest));
switch (type) {
case MSGPACK_CT_ARRAY_ITEM:
return visitor_holder.visitor().start_array_item() ? PARSE_CONTINUE : PARSE_STOP_VISITOR;
case MSGPACK_CT_MAP_KEY:
return visitor_holder.visitor().start_map_key() ? PARSE_CONTINUE : PARSE_STOP_VISITOR;
case MSGPACK_CT_MAP_VALUE:
assert(0);
return PARSE_STOP_VISITOR;
}
assert(0);
return PARSE_STOP_VISITOR;
}
parse_return consume(VisitorHolder& visitor_holder) {
while (!m_stack.empty()) {
stack_elem& e = m_stack.back();
switch (e.m_type) {
case MSGPACK_CT_ARRAY_ITEM:
if (!visitor_holder.visitor().end_array_item()) return PARSE_STOP_VISITOR;
if (--e.m_rest == 0) {
m_stack.pop_back();
if (!visitor_holder.visitor().end_array()) return PARSE_STOP_VISITOR;
}
else {
if (!visitor_holder.visitor().start_array_item()) return PARSE_STOP_VISITOR;
return PARSE_CONTINUE;
}
break;
case MSGPACK_CT_MAP_KEY:
if (!visitor_holder.visitor().end_map_key()) return PARSE_STOP_VISITOR;
if (!visitor_holder.visitor().start_map_value()) return PARSE_STOP_VISITOR;
e.m_type = MSGPACK_CT_MAP_VALUE;
return PARSE_CONTINUE;
case MSGPACK_CT_MAP_VALUE:
if (!visitor_holder.visitor().end_map_value()) return PARSE_STOP_VISITOR;
if (--e.m_rest == 0) {
m_stack.pop_back();
if (!visitor_holder.visitor().end_map()) return PARSE_STOP_VISITOR;
}
else {
e.m_type = MSGPACK_CT_MAP_KEY;
if (!visitor_holder.visitor().start_map_key()) return PARSE_STOP_VISITOR;
return PARSE_CONTINUE;
}
break;
}
}
return PARSE_SUCCESS;
}
bool empty() const { return m_stack.empty(); }
void clear() { m_stack.clear(); }
private:
std::vector<stack_elem> m_stack;
};
char const* m_start;
char const* m_current;
std::size_t m_trail;
uint32_t m_cs;
uint32_t m_num_elements;
unpack_stack m_stack;
};
template <std::size_t N>
inline void check_ext_size(std::size_t /*size*/) {
}
template <>
inline void check_ext_size<4>(std::size_t size) {
if (size == 0xffffffff) throw msgpack::ext_size_overflow("ext size overflow");
}
template <typename VisitorHolder>
inline parse_return context<VisitorHolder>::execute(const char* data, std::size_t len, std::size_t& off)
{
assert(len >= off);
m_start = data;
m_current = data + off;
const char* const pe = data + len;
const char* n = MSGPACK_NULLPTR;
if(m_current == pe) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_CONTINUE;
}
bool fixed_trail_again = false;
do {
if (m_cs == MSGPACK_CS_HEADER) {
fixed_trail_again = false;
int selector = *reinterpret_cast<const unsigned char*>(m_current);
if (0x00 <= selector && selector <= 0x7f) { // Positive Fixnum
uint8_t tmp = *reinterpret_cast<const uint8_t*>(m_current);
bool visret = holder().visitor().visit_positive_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} else if(0xe0 <= selector && selector <= 0xff) { // Negative Fixnum
int8_t tmp = *reinterpret_cast<const int8_t*>(m_current);
bool visret = holder().visitor().visit_negative_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} else if (0xc4 <= selector && selector <= 0xdf) {
const uint32_t trail[] = {
1, // bin 8 0xc4
2, // bin 16 0xc5
4, // bin 32 0xc6
1, // ext 8 0xc7
2, // ext 16 0xc8
4, // ext 32 0xc9
4, // float 32 0xca
8, // float 64 0xcb
1, // uint 8 0xcc
2, // uint 16 0xcd
4, // uint 32 0xce
8, // uint 64 0xcf
1, // int 8 0xd0
2, // int 16 0xd1
4, // int 32 0xd2
8, // int 64 0xd3
2, // fixext 1 0xd4
3, // fixext 2 0xd5
5, // fixext 4 0xd6
9, // fixext 8 0xd7
17,// fixext 16 0xd8
1, // str 8 0xd9
2, // str 16 0xda
4, // str 32 0xdb
2, // array 16 0xdc
4, // array 32 0xdd
2, // map 16 0xde
4, // map 32 0xdf
};
m_trail = trail[selector - 0xc4];
m_cs = next_cs(m_current);
fixed_trail_again = true;
} else if(0xa0 <= selector && selector <= 0xbf) { // FixStr
m_trail = static_cast<uint32_t>(*m_current) & 0x1f;
if(m_trail == 0) {
bool visret = holder().visitor().visit_str(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_STR_VALUE;
fixed_trail_again = true;
}
} else if(0x90 <= selector && selector <= 0x9f) { // FixArray
parse_return ret = start_aggregate<fix_tag>(array_sv(holder()), array_ev(holder()), m_current, off);
if (ret != PARSE_CONTINUE) return ret;
} else if(0x80 <= selector && selector <= 0x8f) { // FixMap
parse_return ret = start_aggregate<fix_tag>(map_sv(holder()), map_ev(holder()), m_current, off);
if (ret != PARSE_CONTINUE) return ret;
} else if(selector == 0xc2) { // false
bool visret = holder().visitor().visit_boolean(false);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} else if(selector == 0xc3) { // true
bool visret = holder().visitor().visit_boolean(true);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} else if(selector == 0xc0) { // nil
bool visret = holder().visitor().visit_nil();
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} else {
off = static_cast<std::size_t>(m_current - m_start);
holder().visitor().parse_error(off - 1, off);
return PARSE_PARSE_ERROR;
}
// end MSGPACK_CS_HEADER
}
if (m_cs != MSGPACK_CS_HEADER || fixed_trail_again) {
if (fixed_trail_again) {
++m_current;
fixed_trail_again = false;
}
if(static_cast<std::size_t>(pe - m_current) < m_trail) {
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_CONTINUE;
}
n = m_current;
m_current += m_trail - 1;
switch(m_cs) {
//case MSGPACK_CS_
//case MSGPACK_CS_
case MSGPACK_CS_FLOAT: {
union { uint32_t i; float f; } mem;
load<uint32_t>(mem.i, n);
bool visret = holder().visitor().visit_float32(mem.f);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_DOUBLE: {
union { uint64_t i; double f; } mem;
load<uint64_t>(mem.i, n);
#if defined(TARGET_OS_IPHONE)
// ok
#elif defined(__arm__) && !(__ARM_EABI__) // arm-oabi
// https://github.com/msgpack/msgpack-perl/pull/1
mem.i = (mem.i & 0xFFFFFFFFUL) << 32UL | (mem.i >> 32UL);
#endif
bool visret = holder().visitor().visit_float64(mem.f);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_UINT_8: {
uint8_t tmp;
load<uint8_t>(tmp, n);
bool visret = holder().visitor().visit_positive_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_UINT_16: {
uint16_t tmp;
load<uint16_t>(tmp, n);
bool visret = holder().visitor().visit_positive_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_UINT_32: {
uint32_t tmp;
load<uint32_t>(tmp, n);
bool visret = holder().visitor().visit_positive_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_UINT_64: {
uint64_t tmp;
load<uint64_t>(tmp, n);
bool visret = holder().visitor().visit_positive_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_INT_8: {
int8_t tmp;
load<int8_t>(tmp, n);
bool visret = holder().visitor().visit_negative_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_INT_16: {
int16_t tmp;
load<int16_t>(tmp, n);
bool visret = holder().visitor().visit_negative_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_INT_32: {
int32_t tmp;
load<int32_t>(tmp, n);
bool visret = holder().visitor().visit_negative_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_INT_64: {
int64_t tmp;
load<int64_t>(tmp, n);
bool visret = holder().visitor().visit_negative_integer(tmp);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_FIXEXT_1: {
bool visret = holder().visitor().visit_ext(n, 1+1);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_FIXEXT_2: {
bool visret = holder().visitor().visit_ext(n, 2+1);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_FIXEXT_4: {
bool visret = holder().visitor().visit_ext(n, 4+1);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_FIXEXT_8: {
bool visret = holder().visitor().visit_ext(n, 8+1);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_FIXEXT_16: {
bool visret = holder().visitor().visit_ext(n, 16+1);
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_STR_8: {
uint8_t tmp;
load<uint8_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_str(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_STR_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_BIN_8: {
uint8_t tmp;
load<uint8_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_bin(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_BIN_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_EXT_8: {
uint8_t tmp;
load<uint8_t>(tmp, n);
m_trail = tmp + 1;
if(m_trail == 0) {
bool visret = holder().visitor().visit_ext(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_EXT_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_STR_16: {
uint16_t tmp;
load<uint16_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_str(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_STR_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_BIN_16: {
uint16_t tmp;
load<uint16_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_bin(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_BIN_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_EXT_16: {
uint16_t tmp;
load<uint16_t>(tmp, n);
m_trail = tmp + 1;
if(m_trail == 0) {
bool visret = holder().visitor().visit_ext(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_EXT_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_STR_32: {
uint32_t tmp;
load<uint32_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_str(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_STR_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_BIN_32: {
uint32_t tmp;
load<uint32_t>(tmp, n);
m_trail = tmp;
if(m_trail == 0) {
bool visret = holder().visitor().visit_bin(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_BIN_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_CS_EXT_32: {
uint32_t tmp;
load<uint32_t>(tmp, n);
check_ext_size<sizeof(std::size_t)>(tmp);
m_trail = tmp;
++m_trail;
if(m_trail == 0) {
bool visret = holder().visitor().visit_ext(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
}
else {
m_cs = MSGPACK_ACS_EXT_VALUE;
fixed_trail_again = true;
}
} break;
case MSGPACK_ACS_STR_VALUE: {
bool visret = holder().visitor().visit_str(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_ACS_BIN_VALUE: {
bool visret = holder().visitor().visit_bin(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_ACS_EXT_VALUE: {
bool visret = holder().visitor().visit_ext(n, static_cast<uint32_t>(m_trail));
parse_return upr = after_visit_proc(visret, off);
if (upr != PARSE_CONTINUE) return upr;
} break;
case MSGPACK_CS_ARRAY_16: {
parse_return ret = start_aggregate<uint16_t>(array_sv(holder()), array_ev(holder()), n, off);
if (ret != PARSE_CONTINUE) return ret;
} break;
case MSGPACK_CS_ARRAY_32: {
parse_return ret = start_aggregate<uint32_t>(array_sv(holder()), array_ev(holder()), n, off);
if (ret != PARSE_CONTINUE) return ret;
} break;
case MSGPACK_CS_MAP_16: {
parse_return ret = start_aggregate<uint16_t>(map_sv(holder()), map_ev(holder()), n, off);
if (ret != PARSE_CONTINUE) return ret;
} break;
case MSGPACK_CS_MAP_32: {
parse_return ret = start_aggregate<uint32_t>(map_sv(holder()), map_ev(holder()), n, off);
if (ret != PARSE_CONTINUE) return ret;
} break;
default:
off = static_cast<std::size_t>(m_current - m_start);
holder().visitor().parse_error(static_cast<std::size_t>(n - m_start - 1), static_cast<std::size_t>(n - m_start));
return PARSE_PARSE_ERROR;
}
}
} while(m_current != pe);
off = static_cast<std::size_t>(m_current - m_start);
return PARSE_CONTINUE;
}
} // detail
/// Parsing class for a stream deserialization.
template <typename VisitorHolder, typename ReferencedBufferHook>
class parser : public detail::context<VisitorHolder> {
typedef parser<VisitorHolder, ReferencedBufferHook> this_type;
typedef detail::context<VisitorHolder> context_type;
public:
/// Constructor
/**
* @param hook The handler that is called when buffer is allocated internally.
* `hook` should be callable with char* parameter.
* `parser` gives a chance to prepare finalizer.
* See https://github.com/msgpack/msgpack-c/wiki/v2_0_cpp_visitor#parse-api
* @param initial_buffer_size The memory size to allocate when unpacker is constructed.
*
*/
parser(ReferencedBufferHook& hook,
std::size_t initial_buffer_size = MSGPACK_UNPACKER_INIT_BUFFER_SIZE);
#if !defined(MSGPACK_USE_CPP03)
parser(this_type&& other);
this_type& operator=(this_type&& other);
#endif // !defined(MSGPACK_USE_CPP03)
~parser();
public:
/// Reserve a buffer memory.
/**
* @param size The size of allocating memory.
*
* After returning this function, buffer_capacity() returns at least 'size'.
* See:
* https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_unpacker#msgpack-controls-a-buffer
*/
void reserve_buffer(std::size_t size = MSGPACK_UNPACKER_RESERVE_SIZE);
/// Get buffer pointer.
/**
* You need to care about the memory is enable between buffer() and buffer() + buffer_capacity()
* See:
* https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_unpacker#msgpack-controls-a-buffer
*/
char* buffer();
/// Get buffer capacity.
/**
* @return The memory size that you can write.
*
* See:
* https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_unpacker#msgpack-controls-a-buffer
*/
std::size_t buffer_capacity() const;
/// Notify a buffer consumed information to msgpack::unpacker.
/**
* @param size The size of memory that you consumed.
*
* After copying the data to the memory that is pointed by buffer(), you need to call the
* function to notify how many bytes are consumed. Then you can call next() functions.
*
* See:
* https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_unpacker#msgpack-controls-a-buffer
*/
void buffer_consumed(std::size_t size);
/// Unpack one msgpack::object.
/**
*
*
* @return If one msgpack::object is unpacked, then return true, if msgpack::object is incomplete
* and additional data is required, then return false. If data format is invalid, throw
* msgpack::parse_error.
*
* See:
* https://github.com/msgpack/msgpack-c/wiki/v1_1_cpp_unpacker#msgpack-controls-a-buffer
*/
bool next();
/// Get message size.
/**
* @return Returns parsed_size() + nonparsed_size()
*/
std::size_t message_size() const;
public:
/// Get parsed message size.
/**
* @return Parsed message size.
*
* This function is usable when non-MessagePack message follows after
* MessagePack message.
*/
std::size_t parsed_size() const;
/// Get the address that is not parsed in the buffer.
/**
* @return Address of the buffer that is not parsed
*
* This function is usable when non-MessagePack message follows after
* MessagePack message.
*/
char* nonparsed_buffer();
/// Get the size of the buffer that is not parsed.
/**
* @return Size of the buffer that is not parsed
*
* This function is usable when non-MessagePack message follows after
* MessagePack message.
*/
std::size_t nonparsed_size() const;
/// Skip the specified size of non-parsed buffer.
/**
* @param size to skip
*
* Note that the `size' argument must be smaller than nonparsed_size().
* This function is usable when non-MessagePack message follows after
* MessagePack message.
*/
void skip_nonparsed_buffer(std::size_t size);
/// Remove nonparsed buffer and reset the current position as a new start point.
/**
* This function is usable when non-MessagePack message follows after
* MessagePack message.
*/
void remove_nonparsed_buffer();
void reset();
protected:
char* get_raw_buffer() {
return m_buffer;
}
private:
void expand_buffer(std::size_t size);
parse_return execute_imp();
private:
char* m_buffer;
std::size_t m_used;
std::size_t m_free;
std::size_t m_off;
std::size_t m_parsed;
std::size_t m_initial_buffer_size;
ReferencedBufferHook& m_referenced_buffer_hook;
#if defined(MSGPACK_USE_CPP03)
private:
parser(const this_type&);
this_type& operator=(const this_type&);
#else // defined(MSGPACK_USE_CPP03)
public:
parser(const this_type&) = delete;
this_type& operator=(const this_type&) = delete;
#endif // defined(MSGPACK_USE_CPP03)
};
template <typename VisitorHolder, typename ReferencedBufferHook>
inline parser<VisitorHolder, ReferencedBufferHook>::parser(
ReferencedBufferHook& hook,
std::size_t initial_buffer_size)
:m_referenced_buffer_hook(hook)
{
if(initial_buffer_size < COUNTER_SIZE) {
initial_buffer_size = COUNTER_SIZE;
}
char* buffer = static_cast<char*>(::malloc(initial_buffer_size));
if(!buffer) {
throw std::bad_alloc();
}
m_buffer = buffer;
m_used = COUNTER_SIZE;
m_free = initial_buffer_size - m_used;
m_off = COUNTER_SIZE;
m_parsed = 0;
m_initial_buffer_size = initial_buffer_size;
detail::init_count(m_buffer);
}
#if !defined(MSGPACK_USE_CPP03)
// Move constructor and move assignment operator
template <typename VisitorHolder, typename ReferencedBufferHook>
inline parser<VisitorHolder, ReferencedBufferHook>::parser(this_type&& other)
:context_type(std::move(other)),
m_buffer(other.m_buffer),
m_used(other.m_used),
m_free(other.m_free),
m_off(other.m_off),
m_parsed(other.m_parsed),
m_initial_buffer_size(other.m_initial_buffer_size),
m_referenced_buffer_hook(other.m_referenced_buffer_hook) {
other.m_buffer = MSGPACK_NULLPTR;
other.m_used = 0;
other.m_free = 0;
other.m_off = 0;
other.m_parsed = 0;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline parser<VisitorHolder, ReferencedBufferHook>& parser<VisitorHolder, ReferencedBufferHook>::operator=(this_type&& other) {
this->~parser();
new (this) this_type(std::move(other));
return *this;
}
#endif // !defined(MSGPACK_USE_CPP03)
template <typename VisitorHolder, typename ReferencedBufferHook>
inline parser<VisitorHolder, ReferencedBufferHook>::~parser()
{
// These checks are required for move operations.
if (m_buffer) detail::decr_count(m_buffer);
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::reserve_buffer(std::size_t size)
{
if(m_free >= size) return;
expand_buffer(size);
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::expand_buffer(std::size_t size)
{
if(m_used == m_off && detail::get_count(m_buffer) == 1
&& !static_cast<VisitorHolder&>(*this).visitor().referenced()) {
// rewind buffer
m_free += m_used - COUNTER_SIZE;
m_used = COUNTER_SIZE;
m_off = COUNTER_SIZE;
if(m_free >= size) return;
}
if(m_off == COUNTER_SIZE) {
std::size_t next_size = (m_used + m_free) * 2; // include COUNTER_SIZE
while(next_size < size + m_used) {
std::size_t tmp_next_size = next_size * 2;
if (tmp_next_size <= next_size) {
next_size = size + m_used;
break;
}
next_size = tmp_next_size;
}
char* tmp = static_cast<char*>(::realloc(m_buffer, next_size));
if(!tmp) {
throw std::bad_alloc();
}
m_buffer = tmp;
m_free = next_size - m_used;
} else {
std::size_t next_size = m_initial_buffer_size; // include COUNTER_SIZE
std::size_t not_parsed = m_used - m_off;
while(next_size < size + not_parsed + COUNTER_SIZE) {
std::size_t tmp_next_size = next_size * 2;
if (tmp_next_size <= next_size) {
next_size = size + not_parsed + COUNTER_SIZE;
break;
}
next_size = tmp_next_size;
}
char* tmp = static_cast<char*>(::malloc(next_size));
if(!tmp) {
throw std::bad_alloc();
}
detail::init_count(tmp);
std::memcpy(tmp+COUNTER_SIZE, m_buffer + m_off, not_parsed);
if(static_cast<VisitorHolder&>(*this).referenced()) {
try {
m_referenced_buffer_hook(m_buffer);
}
catch (...) {
::free(tmp);
throw;
}
static_cast<VisitorHolder&>(*this).set_referenced(false);
} else {
detail::decr_count(m_buffer);
}
m_buffer = tmp;
m_used = not_parsed + COUNTER_SIZE;
m_free = next_size - m_used;
m_off = COUNTER_SIZE;
}
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline char* parser<VisitorHolder, ReferencedBufferHook>::buffer()
{
return m_buffer + m_used;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline std::size_t parser<VisitorHolder, ReferencedBufferHook>::buffer_capacity() const
{
return m_free;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::buffer_consumed(std::size_t size)
{
m_used += size;
m_free -= size;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline bool parser<VisitorHolder, ReferencedBufferHook>::next()
{
parse_return ret = execute_imp();
return ret == PARSE_SUCCESS;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline parse_return parser<VisitorHolder, ReferencedBufferHook>::execute_imp()
{
std::size_t off = m_off;
parse_return ret = context_type::execute(m_buffer, m_used, m_off);
if(m_off > off) {
m_parsed += m_off - off;
}
return ret;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::reset()
{
context_type::init();
// don't reset referenced flag
m_parsed = 0;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline std::size_t parser<VisitorHolder, ReferencedBufferHook>::message_size() const
{
return m_parsed - m_off + m_used;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline std::size_t parser<VisitorHolder, ReferencedBufferHook>::parsed_size() const
{
return m_parsed;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline char* parser<VisitorHolder, ReferencedBufferHook>::nonparsed_buffer()
{
return m_buffer + m_off;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline std::size_t parser<VisitorHolder, ReferencedBufferHook>::nonparsed_size() const
{
return m_used - m_off;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::skip_nonparsed_buffer(std::size_t size)
{
m_off += size;
}
template <typename VisitorHolder, typename ReferencedBufferHook>
inline void parser<VisitorHolder, ReferencedBufferHook>::remove_nonparsed_buffer()
{
m_used = m_off;
}
template <typename Visitor>
inline bool parse(const char* data, size_t len, size_t& off, Visitor& v) {
parse_return ret = msgpack::detail::parse_imp(data, len, off, v);
return ret == PARSE_SUCCESS || ret == PARSE_EXTRA_BYTES;
}
template <typename Visitor>
inline bool parse(const char* data, size_t len, Visitor& v) {
std::size_t off = 0;
return msgpack::parse(data, len, off, v);
}
namespace detail {
template <typename Visitor>
struct parse_helper : detail::context<parse_helper<Visitor> > {
parse_helper(Visitor& v):m_visitor(v) {}
parse_return execute(const char* data, std::size_t len, std::size_t& off) {
return detail::context<parse_helper<Visitor> >::execute(data, len, off);
}
Visitor& visitor() const { return m_visitor; }
Visitor& m_visitor;
};
template <typename Visitor>
inline parse_return
parse_imp(const char* data, size_t len, size_t& off, Visitor& v) {
std::size_t noff = off;
if(len <= noff) {
// FIXME
v.insufficient_bytes(noff, noff);
return PARSE_CONTINUE;
}
detail::parse_helper<Visitor> h(v);
parse_return ret = h.execute(data, len, noff);
switch (ret) {
case PARSE_CONTINUE:
off = noff;
v.insufficient_bytes(noff - 1, noff);
return ret;
case PARSE_SUCCESS:
off = noff;
if(noff < len) {
return PARSE_EXTRA_BYTES;
}
return ret;
default:
return ret;
}
}
} // detail
/// @cond
} // MSGPACK_API_VERSION_NAMESPACE(v2)
/// @endcond
} // namespace msgpack
#endif // MSGPACK_DEFAULT_API_VERSION >= 2
#endif // MSGPACK_V2_PARSE_HPP