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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_OUTPUT_FORMAT_HPP
#define JSONCONS_OUTPUT_FORMAT_HPP
#include <string>
#include <sstream>
#include <vector>
#include <istream>
#include <ostream>
#include <cstdlib>
#include <limits>
#include <cwchar>
namespace jsoncons {
enum class block_options {next_line,same_line};
template <typename CharT>
class buffered_ostream;
template <typename CharT>
class basic_output_format
{
int indent_;
uint8_t precision_;
bool replace_nan_;
bool replace_pos_inf_;
bool replace_neg_inf_;
std::basic_string<CharT> nan_replacement_;
std::basic_string<CharT> pos_inf_replacement_;
std::basic_string<CharT> neg_inf_replacement_;
bool escape_all_non_ascii_;
bool escape_solidus_;
block_options object_array_block_option_;
block_options array_array_block_option_;
block_options object_object_block_option_;
block_options array_object_block_option_;
public:
static const size_t default_indent = 4;
// Constructors
basic_output_format()
:
indent_(default_indent),
precision_(16),
replace_nan_(true),
replace_pos_inf_(true),
replace_neg_inf_(true),
nan_replacement_(json_literals<CharT>::null_literal().first),
pos_inf_replacement_(json_literals<CharT>::null_literal().first),
neg_inf_replacement_(json_literals<CharT>::null_literal().first),
escape_all_non_ascii_(false),
escape_solidus_(false),
object_array_block_option_(block_options::same_line),
array_array_block_option_(block_options::next_line),
object_object_block_option_(block_options::same_line),
array_object_block_option_(block_options::next_line)
{
}
// Accessors
block_options object_array_block_option()
{
return object_array_block_option_;
}
basic_output_format<CharT>& object_array_block_option(block_options value)
{
object_array_block_option_ = value;
return *this;
}
block_options object_object_block_option()
{
return object_object_block_option_;
}
basic_output_format<CharT>& object_object_block_option(block_options value)
{
object_object_block_option_ = value;
return *this;
}
block_options array_array_block_option()
{
return array_array_block_option_;
}
basic_output_format<CharT>& array_array_block_option(block_options value)
{
array_array_block_option_ = value;
return *this;
}
block_options array_object_block_option()
{
return array_object_block_option_;
}
basic_output_format<CharT>& array_object_block_option(block_options value)
{
array_object_block_option_ = value;
return *this;
}
int indent() const
{
return indent_;
}
uint8_t precision() const
{
return precision_;
}
bool escape_all_non_ascii() const
{
return escape_all_non_ascii_;
}
bool escape_solidus() const
{
return escape_solidus_;
}
bool replace_nan() const {return replace_nan_;}
bool replace_pos_inf() const {return replace_pos_inf_;}
bool replace_neg_inf() const {return replace_neg_inf_;}
std::basic_string<CharT> nan_replacement() const
{
return nan_replacement_;
}
std::basic_string<CharT> pos_inf_replacement() const
{
return pos_inf_replacement_;
}
std::basic_string<CharT> neg_inf_replacement() const
{
return neg_inf_replacement_;
}
// Modifiers
basic_output_format<CharT>& precision(uint8_t prec)
{
precision_ = prec;
return *this;
}
basic_output_format<CharT>& escape_all_non_ascii(bool value)
{
escape_all_non_ascii_ = value;
return *this;
}
basic_output_format<CharT>& escape_solidus(bool value)
{
escape_solidus_ = value;
return *this;
}
basic_output_format<CharT>& replace_nan(bool replace)
{
replace_nan_ = replace;
return *this;
}
basic_output_format<CharT>& replace_inf(bool replace)
{
replace_pos_inf_ = replace;
replace_neg_inf_ = replace;
return *this;
}
basic_output_format<CharT>& replace_pos_inf(bool replace)
{
replace_pos_inf_ = replace;
return *this;
}
basic_output_format<CharT>& replace_neg_inf(bool replace)
{
replace_neg_inf_ = replace;
return *this;
}
basic_output_format<CharT>& nan_replacement(const std::basic_string<CharT>& replacement)
{
nan_replacement_ = replacement;
return *this;
}
basic_output_format<CharT>& pos_inf_replacement(const std::basic_string<CharT>& replacement)
{
pos_inf_replacement_ = replacement;
return *this;
}
basic_output_format<CharT>& neg_inf_replacement(const std::basic_string<CharT>& replacement)
{
neg_inf_replacement_ = replacement;
return *this;
}
basic_output_format<CharT>& indent(int value)
{
indent_ = value;
return *this;
}
};
template<typename CharT>
void escape_string(const CharT* s,
size_t length,
const basic_output_format<CharT>& format,
buffered_ostream<CharT>& os)
{
const CharT* begin = s;
const CharT* end = s + length;
for (const CharT* it = begin; it != end; ++it)
{
CharT c = *it;
switch (c)
{
case '\\':
os.put('\\');
os.put('\\');
break;
case '"':
os.put('\\');
os.put('\"');
break;
case '\b':
os.put('\\');
os.put('b');
break;
case '\f':
os.put('\\');
os.put('f');
break;
case '\n':
os.put('\\');
os.put('n');
break;
case '\r':
os.put('\\');
os.put('r');
break;
case '\t':
os.put('\\');
os.put('t');
break;
default:
uint32_t u(c >= 0 ? c : 256 + c);
if (format.escape_solidus() && c == '/')
{
os.put('\\');
os.put('/');
}
else if (is_control_character(u) || format.escape_all_non_ascii())
{
// convert utf8 to codepoint
uint32_t cp = json_char_traits<CharT, sizeof(CharT)>::convert_char_to_codepoint(it, end);
if (is_non_ascii_character(cp) || is_control_character(u))
{
if (cp > 0xFFFF)
{
cp -= 0x10000;
uint32_t first = (cp >> 10) + 0xD800;
uint32_t second = ((cp & 0x03FF) + 0xDC00);
os.put('\\');
os.put('u');
os.put(to_hex_character(first >> 12 & 0x000F));
os.put(to_hex_character(first >> 8 & 0x000F));
os.put(to_hex_character(first >> 4 & 0x000F));
os.put(to_hex_character(first & 0x000F));
os.put('\\');
os.put('u');
os.put(to_hex_character(second >> 12 & 0x000F));
os.put(to_hex_character(second >> 8 & 0x000F));
os.put(to_hex_character(second >> 4 & 0x000F));
os.put(to_hex_character(second & 0x000F));
}
else
{
os.put('\\');
os.put('u');
os.put(to_hex_character(cp >> 12 & 0x000F));
os.put(to_hex_character(cp >> 8 & 0x000F));
os.put(to_hex_character(cp >> 4 & 0x000F));
os.put(to_hex_character(cp & 0x000F));
}
}
else
{
os.put(c);
}
}
else if (format.escape_solidus() && c == '/')
{
os.put('\\');
os.put('/');
}
else
{
os.put(c);
}
break;
}
}
}
typedef basic_output_format<char> output_format;
typedef basic_output_format<wchar_t> woutput_format;
}
#endif
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