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Diffstat (limited to 'vendor/jsoncons-0.99.2/jsoncons/json_deserializer.hpp')
| -rw-r--r-- | vendor/jsoncons-0.99.2/jsoncons/json_deserializer.hpp | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/vendor/jsoncons-0.99.2/jsoncons/json_deserializer.hpp b/vendor/jsoncons-0.99.2/jsoncons/json_deserializer.hpp new file mode 100644 index 00000000..31cd0db9 --- /dev/null +++ b/vendor/jsoncons-0.99.2/jsoncons/json_deserializer.hpp @@ -0,0 +1,267 @@ +// Copyright 2013-2016 Daniel Parker +// Distributed under the Boost license, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +// See https://github.com/danielaparker/jsoncons for latest version + +#ifndef JSONCONS_JSON_DESERIALIZER_HPP +#define JSONCONS_JSON_DESERIALIZER_HPP + +#include <string> +#include <sstream> +#include <vector> +#include <istream> +#include <cstdlib> +#include <memory> +#include "jsoncons/jsoncons.hpp" +#include "jsoncons/json_input_handler.hpp" + +namespace jsoncons { + +template <class JsonT> +class basic_json_deserializer : public basic_json_input_handler<typename JsonT::char_type> +{ + static const int default_stack_size = 1000; + + typedef typename JsonT::char_type char_type; + typedef typename JsonT::member_type member_type; + typedef typename JsonT::string_type string_type; + typedef typename string_type::allocator_type string_allocator; + typedef typename JsonT::allocator_type allocator_type; + typedef typename JsonT::array array; + typedef typename array::allocator_type array_allocator; + typedef typename JsonT::object object; + typedef typename object::allocator_type object_allocator; + typedef typename JsonT::value_type value_type; + + string_allocator sa_; + object_allocator oa_; + array_allocator aa_; + + JsonT result_; + size_t top_; + + struct stack_item + { + string_type name_; + value_type value_; + }; + std::vector<stack_item> stack_; + std::vector<size_t> stack2_; + bool is_valid_; + +public: + basic_json_deserializer(const string_allocator& sa = string_allocator(), + const allocator_type& allocator = allocator_type()) + : sa_(sa), + oa_(allocator), + aa_(allocator), + top_(0), + stack_(default_stack_size), + stack2_(), + is_valid_(true) // initial json value is an empty object + + { + stack2_.reserve(100); + } + + bool is_valid() const + { + return is_valid_; + } + + JsonT get_result() + { + is_valid_ = false; + return std::move(result_); + } + +#if !defined(JSONCONS_NO_DEPRECATED) + JsonT& root() + { + return result_; + } +#endif + +private: + + void push_initial() + { + top_ = 0; + if (top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void pop_initial() + { + JSONCONS_ASSERT(top_ == 1); + result_.swap(stack_[0].value_); + --top_; + } + + void push_object() + { + stack2_.push_back(top_); + stack_[top_].value_ = object(oa_); + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void pop_object() + { + stack2_.pop_back(); + JSONCONS_ASSERT(top_ > 0); + } + + void push_array() + { + stack2_.push_back(top_); + stack_[top_].value_ = array(aa_); + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void pop_array() + { + stack2_.pop_back(); + JSONCONS_ASSERT(top_ > 0); + } + + void do_begin_json() override + { + is_valid_ = false; + push_initial(); + } + + void do_end_json() override + { + is_valid_ = true; + pop_initial(); + } + + void do_begin_object(const basic_parsing_context<char_type>&) override + { + push_object(); + } + + void do_end_object(const basic_parsing_context<char_type>&) override + { + end_structure(); + pop_object(); + } + + void do_begin_array(const basic_parsing_context<char_type>&) override + { + push_array(); + } + + void do_end_array(const basic_parsing_context<char_type>&) override + { + end_structure(); + pop_array(); + } + + static member_type move_pair(stack_item&& val) + { + return member_type(std::move(val.name_),std::move(val.value_)); + } + + void end_structure() + { + JSONCONS_ASSERT(stack2_.size() > 0); + if (stack_[stack2_.back()].value_.is_object()) + { + size_t count = top_ - (stack2_.back() + 1); + auto s = stack_.begin() + (stack2_.back()+1); + auto send = s + count; + stack_[stack2_.back()].value_.object_value().insert( + std::make_move_iterator(s), + std::make_move_iterator(send), + move_pair); + top_ -= count; + } + else + { + size_t count = top_ - (stack2_.back() + 1); + stack_[stack2_.back()].value_.resize(count); + + auto s = stack_.begin() + (stack2_.back()+1); + auto dend = stack_[stack2_.back()].value_.elements().end(); + for (auto it = stack_[stack2_.back()].value_.elements().begin(); + it != dend; ++it, ++s) + { + *it = std::move(s->value_); + } + top_ -= count; + } + } + + void do_name(const char_type* p, size_t length, const basic_parsing_context<char_type>&) override + { + stack_[top_].name_ = string_type(p,length,sa_); + } + + void do_string_value(const char_type* p, size_t length, const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = JsonT(p,length,sa_); + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void do_integer_value(int64_t value, const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = value; + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void do_uinteger_value(uint64_t value, const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = value; + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void do_double_value(double value, uint8_t precision, const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = value_type(value,precision); + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void do_bool_value(bool value, const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = value; + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } + + void do_null_value(const basic_parsing_context<char_type>&) override + { + stack_[top_].value_ = null_type(); + if (++top_ >= stack_.size()) + { + stack_.resize(top_*2); + } + } +}; + +} + +#endif |