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// Copyright 2013 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_INPUT_HANDLER_HPP
#define JSONCONS_JSON_INPUT_HANDLER_HPP
#include <string>
#include "jsoncons/jsoncons.hpp"
namespace jsoncons {
template<typename CharT>
uint64_t string_to_uinteger(const CharT *s, size_t length) throw(std::overflow_error)
{
static const uint64_t max_value = std::numeric_limits<uint64_t>::max JSONCONS_NO_MACRO_EXP();
static const uint64_t max_value_div_10 = max_value / 10;
uint64_t n = 0;
for (size_t i = 0; i < length; ++i)
{
uint64_t x = s[i] - '0';
if (n > max_value_div_10)
{
throw std::overflow_error("Unsigned overflow");
}
n = n * 10;
if (n > max_value - x)
{
throw std::overflow_error("Unsigned overflow");
}
n += x;
}
return n;
}
template<typename CharT>
int64_t string_to_integer(bool has_neg, const CharT *s, size_t length) throw(std::overflow_error)
{
const long long max_value = std::numeric_limits<int64_t>::max JSONCONS_NO_MACRO_EXP();
const long long max_value_div_10 = max_value / 10;
long long n = 0;
for (size_t i = 0; i < length; ++i)
{
long long x = s[i] - '0';
if (n > max_value_div_10)
{
throw std::overflow_error("Integer overflow");
}
n = n * 10;
if (n > max_value - x)
{
throw std::overflow_error("Integer overflow");
}
n += x;
}
return has_neg ? -n : n;
}
template <typename CharT>
class basic_parsing_context;
template <typename CharT>
class basic_json_input_handler
{
public:
virtual ~basic_json_input_handler() {}
void begin_json()
{
do_begin_json();
}
void end_json()
{
do_end_json();
}
void begin_object(const basic_parsing_context<CharT>& context)
{
do_begin_object(context);
}
void end_object(const basic_parsing_context<CharT>& context)
{
do_end_object(context);
}
void begin_array(const basic_parsing_context<CharT>& context)
{
do_begin_array(context);
}
void end_array(const basic_parsing_context<CharT>& context)
{
do_end_array(context);
}
void name(const std::basic_string<CharT>& name, const basic_parsing_context<CharT>& context)
{
do_name(name.data(), name.length(), context);
}
void name(const CharT* p, size_t length, const basic_parsing_context<CharT>& context)
{
do_name(p, length, context);
}
void value(const std::basic_string<CharT>& value, const basic_parsing_context<CharT>& context)
{
do_string_value(value.data(), value.length(), context);
}
void value(const CharT* p, size_t length, const basic_parsing_context<CharT>& context)
{
do_string_value(p, length, context);
}
void value(const CharT* p, const basic_parsing_context<CharT>& context)
{
do_string_value(p, std::char_traits<CharT>::length(p), context);
}
void value(int value, const basic_parsing_context<CharT>& context)
{
do_integer_value(value,context);
}
void value(long value, const basic_parsing_context<CharT>& context)
{
do_integer_value(value,context);
}
void value(long long value, const basic_parsing_context<CharT>& context)
{
do_integer_value(value,context);
}
void value(unsigned int value, const basic_parsing_context<CharT>& context)
{
do_uinteger_value(value,context);
}
void value(unsigned long value, const basic_parsing_context<CharT>& context)
{
do_uinteger_value(value,context);
}
void value(unsigned long long value, const basic_parsing_context<CharT>& context)
{
do_uinteger_value(value,context);
}
void value(float value, uint8_t precision, const basic_parsing_context<CharT>& context)
{
do_double_value(value, precision, context);
}
void value(double value, uint8_t precision, const basic_parsing_context<CharT>& context)
{
do_double_value(value, precision, context);
}
void value(bool value, const basic_parsing_context<CharT>& context)
{
do_bool_value(value,context);
}
void value(null_type, const basic_parsing_context<CharT>& context)
{
do_null_value(context);
}
private:
virtual void do_begin_json() = 0;
virtual void do_end_json() = 0;
virtual void do_begin_object(const basic_parsing_context<CharT>& context) = 0;
virtual void do_end_object(const basic_parsing_context<CharT>& context) = 0;
virtual void do_begin_array(const basic_parsing_context<CharT>& context) = 0;
virtual void do_end_array(const basic_parsing_context<CharT>& context) = 0;
virtual void do_name(const CharT* name, size_t length, const basic_parsing_context<CharT>& context) = 0;
virtual void do_null_value(const basic_parsing_context<CharT>& context) = 0;
virtual void do_string_value(const CharT* value, size_t length, const basic_parsing_context<CharT>& context) = 0;
virtual void do_double_value(double value, uint8_t precision, const basic_parsing_context<CharT>& context) = 0;
virtual void do_integer_value(int64_t value, const basic_parsing_context<CharT>& context) = 0;
virtual void do_uinteger_value(uint64_t value, const basic_parsing_context<CharT>& context) = 0;
virtual void do_bool_value(bool value, const basic_parsing_context<CharT>& context) = 0;
};
template <typename CharT>
class basic_empty_json_input_handler : public basic_json_input_handler<CharT>
{
public:
static basic_json_input_handler<CharT>& instance()
{
static basic_empty_json_input_handler<CharT> instance;
return instance;
}
private:
void do_begin_json() override
{
}
void do_end_json() override
{
}
void do_begin_object(const basic_parsing_context<CharT>&) override
{
}
void do_end_object(const basic_parsing_context<CharT>&) override
{
}
void do_begin_array(const basic_parsing_context<CharT>&) override
{
}
void do_end_array(const basic_parsing_context<CharT>&) override
{
}
void do_name(const CharT* p, size_t length, const basic_parsing_context<CharT>&) override
{
(void)p;
(void)length;
}
void do_null_value(const basic_parsing_context<CharT>&) override
{
}
void do_string_value(const CharT* p, size_t length, const basic_parsing_context<CharT>&) override
{
(void)p;
(void)length;
}
void do_double_value(double, uint8_t, const basic_parsing_context<CharT>&) override
{
}
void do_integer_value(int64_t, const basic_parsing_context<CharT>&) override
{
}
void do_uinteger_value(uint64_t, const basic_parsing_context<CharT>&) override
{
}
void do_bool_value(bool, const basic_parsing_context<CharT>&) override
{
}
};
typedef basic_json_input_handler<char> json_input_handler;
typedef basic_json_input_handler<wchar_t> wjson_input_handler;
typedef basic_empty_json_input_handler<char> empty_json_input_handler;
typedef basic_empty_json_input_handler<wchar_t> wempty_json_input_handler;
}
#endif
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