/*
* Copyright 2009-2010 Cybozu Labs, Inc.
* Copyright 2011-2014 Kazuho Oku
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef picojson_h
#define picojson_h
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cfloat>
#include <iostream>
#include <iterator>
#include <limits>
#include <map>
#include <stdexcept>
#include <string>
#include <vector>
// for isnan/isinf
#if __cplusplus>=201103L
# include <cmath>
#else
extern "C" {
# ifdef _MSC_VER
# include <float .h>
# elif defined (__INTEL_COMPILER)
# include <mathimf.h>
# else
# include <math.h>
# endif
}
#endif
// experimental support for int64_t (see README.mkdn for detail)
#ifdef PICOJSON_USE_INT64
# define __STDC_FORMAT_MACROS
# include <errno.h>
# include <inttypes.h>
#endif
// to disable the use of localeconv(3), set PICOJSON_USE_LOCALE to 0
#ifndef PICOJSON_USE_LOCALE
# define PICOJSON_USE_LOCALE 1
#endif
#if PICOJSON_USE_LOCALE
extern "C" {
# include <locale.h>
}
#endif
#ifndef PICOJSON_ASSERT
# define PICOJSON_ASSERT(e) do { if (! (e)) throw std::runtime_error(#e ); } while (0)
#endif
#ifdef _MSC_VER
#define SNPRINTF _snprintf_s
#pragma warning(push)
#pragma warning(disable : 4244) // conversion from int to char
#pragma warning(disable : 4127) // conditional expression is constant
#pragma warning(disable : 4702) // unreachable code
#else
#define SNPRINTF snprintf
#endif
namespace picojson {
enum {
null_type,
boolean_type,
number_type,
string_type,
array_type,
object_type
#ifdef PICOJSON_USE_INT64
, int64_type
#endif
};
enum {
INDENT_WIDTH = 2
};
struct null {};
namespace defaults {
struct default_number_traits {
typedef double value_type;
typedef double return_type;
static return_type& to_return_type(double & t){
return t;
}
static value_type default_value() { return 0.0; }
static void construct(value_type &slot, value_type n) {
if (
#ifdef _MSC_VER
! _finite(n)
#elif __cplusplus>=201103L || !(defined (isnan) && defined (isinf))
std::isnan(n) || std::isinf(n)
#else
isnan(n) || isinf(n)
#endif
) {
throw std::overflow_error("" );
}
slot = n;
}
static void destruct(value_type &slot) {}
static bool evaluate_as_boolean(value_type n) {
return n != 0;
}
static std::pair<value_type, bool > from_str(const std::string& s) {
char *endp;
double f = strtod(s.c_str(), &endp);
if (endp == s.c_str() + s.size()) {
return std::make_pair(f, true );
}
return std::make_pair(0, false );
}
static std::string to_str(value_type n) {
char buf[256];
double tmp;
SNPRINTF(buf, sizeof (buf), fabs(n) < (1ULL << 53) && modf(n, &tmp) == 0 ? "%.f" : "%.17g" , n);
#if PICOJSON_USE_LOCALE
char *decimal_point = localeconv()->decimal_point;
if (strcmp(decimal_point, "." ) != 0) {
size_t decimal_point_len = strlen(decimal_point);
for (char *p = buf; *p != '\0' ; ++p) {
if (strncmp(p, decimal_point, decimal_point_len) == 0) {
return std::string(buf, p) + "." + (p + decimal_point_len);
}
}
}
#endif
return buf;
}
};
struct type_traits {
typedef default_number_traits number_traits;
};
}
template <typename TraitsT> class value_t {
public :
typedef std::vector<value_t> array;
typedef std::map<std::string, value_t> object;
typedef typename TraitsT::number_traits::value_type value;
union _storage {
null null_;
bool boolean_;
value number_;
#ifdef PICOJSON_USE_INT64
int64_t int64_;
#endif
std::string* string_;
array* array_;
object* object_;
};
protected :
int type_;
_storage u_;
public :
value_t();
value_t(int type, bool );
explicit value_t(bool b);
#ifdef PICOJSON_USE_INT64
explicit value_t(int64_t i);
#endif
explicit value_t(const value& n);
explicit value_t(const std::string& s);
explicit value_t(const array& a);
explicit value_t(const object& o);
explicit value_t(const char * s);
value_t(const char * s, size_t len);
~value_t();
value_t(const value_t& x);
value_t& operator =(const value_t& x);
void swap(value_t& x);
template <typename T> bool is() const ;
template <typename T> const T& get() const ;
template <typename T> T& get();
bool evaluate_as_boolean() const ;
const value_t& get(size_t idx) const ;
const value_t& get(const std::string& key) const ;
value_t& get(size_t idx);
value_t& get(const std::string& key);
bool contains(size_t idx) const ;
bool contains(const std::string& key) const ;
std::string to_str() const ;
template <typename Iter> void serialize(Iter os, bool prettify = false ) const ;
std::string serialize(bool prettify = false ) const ;
private :
template <typename T> value_t(const T*); // intentionally defined to block implicit conversion of pointer to bool
template <typename Iter> static void _indent(Iter os, int indent);
template <typename Iter> void _serialize(Iter os, int indent) const ;
std::string _serialize(int indent) const ;
};
typedef value_t<defaults::type_traits> value;
typedef value::array array;
typedef value::object object;
template <typename TraitsT>
inline value_t<TraitsT>::value_t() : type_(null_type) {}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(int type, bool ) : type_(type) {
switch (type) {
#define INIT(p, v) case p## type: u_.p = v; break
INIT(boolean_, false );
INIT(number_, TraitsT::number_traits::default_value());
#ifdef PICOJSON_USE_INT64
INIT(int64_, 0);
#endif
INIT(string_, new std::string());
INIT(array_, new array());
INIT(object_, new object());
#undef INIT
default : break ;
}
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(bool b) : type_(boolean_type) {
u_.boolean_ = b;
}
#ifdef PICOJSON_USE_INT64
template <typename TraitsT>
inline value_t<TraitsT>::value_t(int64_t i) : type_(int64_type) {
u_.int64_ = i;
}
#endif
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const value& n)
: type_(number_type) {
TraitsT::number_traits::construct(u_.number_, n);
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const std::string& s) : type_(string_type) {
u_.string_ = new std::string(s);
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const array& a) : type_(array_type) {
u_.array_ = new array(a);
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const object& o) : type_(object_type) {
u_.object_ = new object(o);
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const char * s) : type_(string_type) {
u_.string_ = new std::string(s);
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const char * s, size_t len) : type_(string_type) {
u_.string_ = new std::string(s, len);
}
template <typename TraitsT>
inline value_t<TraitsT>::~value_t() {
switch (type_) {
case number_type:
TraitsT::number_traits::destruct(u_.number_);
break ;
#define DEINIT(p) case p## type: delete u_.p; break
DEINIT(string_);
DEINIT(array_);
DEINIT(object_);
#undef DEINIT
default : break ;
}
}
template <typename TraitsT>
inline value_t<TraitsT>::value_t(const value_t& x) : type_(x.type_) {
switch (type_) {
case number_type:
TraitsT::number_traits::construct(u_.number_, x.u_.number_);
break ;
#define INIT(p, v) case p## type: u_.p = v; break
INIT(string_, new std::string(*x.u_.string_));
INIT(array_, new array(*x.u_.array_));
INIT(object_, new object(*x.u_.object_));
#undef INIT
default :
u_ = x.u_;
break ;
}
}
template <typename TraitsT>
inline value_t<TraitsT>& value_t<TraitsT>::operator =(const value_t<TraitsT>& x) {
if (this != &x) {
this->~value_t();
new (this ) value_t(x);
}
return *this ;
}
template <typename TraitsT>
inline void value_t<TraitsT>::swap(value_t<TraitsT>& x) {
std::swap(type_, x.type_);
std::swap(u_, x.u_);
}
template <typename TraitsT, typename T> struct _accessor {
static bool is(int type);
static T& get(int & type, typename value_t<TraitsT>::_storage& u);
};
#define ACCESSOR(ctype, jtype, jvar) \
template <typename TraitsT> \
struct _accessor<TraitsT, ctype> { \
static bool is(int type) { \
return type == jtype## _type; \
} \
static ctype& get(int & type, typename value_t<TraitsT>::_storage& u) { \
PICOJSON_ASSERT("type mismatch! call is() before get()" \
&& is(type)); \
return jvar; \
} \
}
ACCESSOR(null, null, u.null_);
ACCESSOR(bool , boolean, u.boolean_);
#ifdef PICOJSON_USE_INT64
ACCESSOR(int64_t, int64, u.int64_);
#endif
ACCESSOR(std::string, string, *u.string_);
ACCESSOR(typename value_t<TraitsT>::array, array, *u.array_);
ACCESSOR(typename value_t<TraitsT>::object, object, *u.object_);
#undef IS
template <typename TraitsT>
struct _accessor<TraitsT, typename TraitsT::number_traits::return_type> { \
static bool is(int type) {
return type == number_type
#ifdef PICOJSON_USE_INT64
|| type == int64_type
#endif
;
}
static typename TraitsT::number_traits::return_type& get(int & type, typename value_t<TraitsT>::_storage& u) {
PICOJSON_ASSERT("type mismatch! call is() before get()"
&& is(type));
#ifdef PICOJSON_USE_INT64
if (type == int64_type) {
type = number_type;
TraitsT::number_traits::construct(u.number_, u.int64_);
}
#endif
return TraitsT::number_traits::to_return_type(u.number_);
}
};
template <typename TraitsT>
template <typename T>
inline bool value_t<TraitsT>::is() const {
return _accessor<TraitsT, T>::is(type_);
}
template <typename TraitsT>
template <typename T>
inline const T& value_t<TraitsT>::get() const {
return const_cast <value_t<TraitsT>*>(this )->get<T>();
}
template <typename TraitsT>
template <typename T>
inline T& value_t<TraitsT>::get() {
return _accessor<TraitsT, T>::get(type_, u_);
}
template <typename TraitsT>
inline bool value_t<TraitsT>::evaluate_as_boolean() const {
switch (type_) {
case null_type:
return false ;
case boolean_type:
return u_.boolean_;
case number_type:
return TraitsT::number_traits::evaluate_as_boolean(u_.number_);
case string_type:
return ! u_.string_->empty();
default :
return true ;
}
}
template <typename TraitsT>
inline const value_t<TraitsT>& value_t<TraitsT>::get(size_t idx) const {
static value_t s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
template <typename TraitsT>
inline value_t<TraitsT>& value_t<TraitsT>::get(size_t idx) {
static value_t s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
template <typename TraitsT>
inline const value_t<TraitsT>& value_t<TraitsT>::get(const std::string& key) const {
static value_t s_null;
PICOJSON_ASSERT(is<object>());
typename object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
template <typename TraitsT>
inline value_t<TraitsT>& value_t<TraitsT>::get(const std::string& key) {
static value_t s_null;
PICOJSON_ASSERT(is<object>());
typename object::iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
template <typename TraitsT>
inline bool value_t<TraitsT>::contains(size_t idx) const {
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size();
}
template <typename TraitsT>
inline bool value_t<TraitsT>::contains(const std::string& key) const {
PICOJSON_ASSERT(is<object>());
typename object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end();
}
template <typename TraitsT>
inline std::string value_t<TraitsT>::to_str() const {
switch (type_) {
case null_type: return "null" ;
case boolean_type: return u_.boolean_ ? "true" : "false" ;
#ifdef PICOJSON_USE_INT64
case int64_type: {
char buf[sizeof ("-9223372036854775808" )];
SNPRINTF(buf, sizeof (buf), "%" PRId64, u_.int64_);
return buf;
}
#endif
case number_type: return TraitsT::number_traits::to_str(u_.number_);
case string_type: return *u_.string_;
case array_type: return "array" ;
case object_type: return "object" ;
default : PICOJSON_ASSERT(0);
#ifdef _MSC_VER
__assume(0);
#endif
}
return std::string();
}
template <typename Iter> void copy(const std::string& s, Iter oi) {
std::copy(s.begin(), s.end(), oi);
}
template <typename Iter> void serialize_str(const std::string& s, Iter oi) {
*oi++ = '"' ;
for (std::string::const_iterator i = s.begin(); i != s.end(); ++i) {
switch (*i) {
#define MAP(val, sym) case val: copy(sym, oi); break
MAP('"' , "\\\" ");
MAP('\\' , "\\\\" );
MAP('/' , "\\/" );
MAP('\b' , "\\b" );
MAP('\f' , "\\f" );
MAP('\n' , "\\n" );
MAP('\r' , "\\r" );
MAP('\t' , "\\t" );
#undef MAP
default :
if (static_cast <unsigned char >(*i) < 0x20 || *i == 0x7f) {
char buf[7];
SNPRINTF(buf, sizeof (buf), "\\u%04x" , *i & 0xff);
copy(buf, buf + 6, oi);
} else {
*oi++ = *i;
}
break ;
}
}
*oi++ = '"' ;
}
template <typename TraitsT>
template <typename Iter>
void value_t<TraitsT>::serialize(Iter oi, bool prettify) const {
return _serialize(oi, prettify ? 0 : -1);
}
template <typename TraitsT>
inline std::string value_t<TraitsT>::serialize(bool prettify) const {
return _serialize(prettify ? 0 : -1);
}
template <typename TraitsT>
template <typename Iter>
inline void value_t<TraitsT>::_indent(Iter oi, int indent) {
*oi++ = '\n' ;
for (int i = 0; i < indent * INDENT_WIDTH; ++i) {
*oi++ = ' ' ;
}
}
template <typename TraitsT>
template <typename Iter>
inline void value_t<TraitsT>::_serialize(Iter oi, int indent) const {
switch (type_) {
case string_type:
serialize_str(*u_.string_, oi);
break ;
case array_type: {
*oi++ = '[' ;
if (indent != -1) {
++indent;
}
for (typename array::const_iterator i = u_.array_->begin();
i != u_.array_->end();
++i) {
if (i != u_.array_->begin()) {
*oi++ = ',' ;
}
if (indent != -1) {
_indent(oi, indent);
}
i->_serialize(oi, indent);
}
if (indent != -1) {
--indent;
if (! u_.array_->empty()) {
_indent(oi, indent);
}
}
*oi++ = ']' ;
break ;
}
case object_type: {
*oi++ = '{' ;
if (indent != -1) {
++indent;
}
for (typename object::const_iterator i = u_.object_->begin();
i != u_.object_->end();
++i) {
if (i != u_.object_->begin()) {
*oi++ = ',' ;
}
if (indent != -1) {
_indent(oi, indent);
}
serialize_str(i->first, oi);
*oi++ = ':' ;
if (indent != -1) {
*oi++ = ' ' ;
}
i->second._serialize(oi, indent);
}
if (indent != -1) {
--indent;
if (! u_.object_->empty()) {
_indent(oi, indent);
}
}
*oi++ = '}' ;
break ;
}
default :
copy(to_str(), oi);
break ;
}
if (indent == 0) {
*oi++ = '\n' ;
}
}
template <typename TraitsT>
inline std::string value_t<TraitsT>::_serialize(int indent) const {
std::string s;
_serialize(std::back_inserter(s), indent);
return s;
}
template <typename Iter> class input {
protected :
Iter cur_, end_;
int last_ch_;
bool ungot_;
int line_;
public :
bool check_ungot() const
{ return ungot_; }
input(const Iter& first, const Iter& last) : cur_(first), end_(last), last_ch_(-1), ungot_(false ), line_(1) {}
int getc() {
if (ungot_) {
ungot_ = false ;
return last_ch_;
}
if (cur_ == end_) {
last_ch_ = -1;
return -1;
}
if (last_ch_ == '\n' ) {
line_++;
}
last_ch_ = *cur_ & 0xff;
++cur_;
return last_ch_;
}
void ungetc() {
if (last_ch_ != -1) {
PICOJSON_ASSERT(! ungot_);
ungot_ = true ;
}
}
Iter cur() const { return cur_; }
int line() const { return line_; }
void skip_ws() {
while (1) {
int ch = getc();
if (! (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r' )) {
ungetc();
break ;
}
}
}
bool expect(int expect) {
skip_ws();
if (getc() != expect) {
ungetc();
return false ;
}
return true ;
}
bool match(const std::string& pattern) {
for (std::string::const_iterator pi(pattern.begin());
pi != pattern.end();
++pi) {
if (getc() != *pi) {
ungetc();
return false ;
}
}
return true ;
}
};
template <typename Iter> inline int _parse_quadhex(input<Iter> &in) {
int uni_ch = 0, hex;
for (int i = 0; i < 4; i++) {
if ((hex = in.getc()) == -1) {
return -1;
}
if ('0' <= hex && hex <= '9' ) {
hex -= '0' ;
} else if ('A' <= hex && hex <= 'F' ) {
hex -= 'A' - 0xa;
} else if ('a' <= hex && hex <= 'f' ) {
hex -= 'a' - 0xa;
} else {
in.ungetc();
return -1;
}
uni_ch = uni_ch * 16 + hex;
}
return uni_ch;
}
template <typename String, typename Iter> inline bool _parse_codepoint(String& out, input<Iter>& in) {
int uni_ch;
if ((uni_ch = _parse_quadhex(in)) == -1) {
return false ;
}
if (0xd800 <= uni_ch && uni_ch <= 0xdfff) {
if (0xdc00 <= uni_ch) {
// a second 16-bit of a surrogate pair appeared
return false ;
}
// first 16-bit of surrogate pair, get the next one
if (in.getc() != '\\' || in.getc() != 'u' ) {
in.ungetc();
return false ;
}
int second = _parse_quadhex(in);
if (! (0xdc00 <= second && second <= 0xdfff)) {
return false ;
}
uni_ch = ((uni_ch - 0xd800) << 10) | ((second - 0xdc00) & 0x3ff);
uni_ch += 0x10000;
}
if (uni_ch < 0x80) {
out.push_back(uni_ch);
} else {
if (uni_ch < 0x800) {
out.push_back(0xc0 | (uni_ch >> 6));
} else {
if (uni_ch < 0x10000) {
out.push_back(0xe0 | (uni_ch >> 12));
} else {
out.push_back(0xf0 | (uni_ch >> 18));
out.push_back(0x80 | ((uni_ch >> 12) & 0x3f));
}
out.push_back(0x80 | ((uni_ch >> 6) & 0x3f));
}
out.push_back(0x80 | (uni_ch & 0x3f));
}
return true ;
}
template <typename String, typename Iter> inline bool _parse_string(String& out, input<Iter>& in) {
while (1) {
int ch = in.getc();
if (ch < ' ' ) {
in.ungetc();
return false ;
} else if (ch == '"' ) {
return true ;
} else if (ch == '\\' ) {
if ((ch = in.getc()) == -1) {
return false ;
}
switch (ch) {
#define MAP(sym, val) case sym: out.push_back(val); break
MAP('"' , '\"' );
MAP('\\' , '\\' );
MAP('/' , '/' );
MAP('b' , '\b' );
MAP('f' , '\f' );
MAP('n' , '\n' );
MAP('r' , '\r' );
MAP('t' , '\t' );
#undef MAP
case 'u' :
if (! _parse_codepoint(out, in)) {
return false ;
}
break ;
default :
return false ;
}
} else {
out.push_back(ch);
}
}
return false ;
}
template <typename Context, typename Iter> inline bool _parse_array(Context& ctx, input<Iter>& in) {
if (! ctx.parse_array_start()) {
return false ;
}
size_t idx = 0;
if (in.expect(']' )) {
return ctx.parse_array_stop(idx);
}
do {
if (! ctx.parse_array_item(in, idx)) {
return false ;
}
idx++;
} while (in.expect(',' ));
return in.expect(']' ) && ctx.parse_array_stop(idx);
}
template <typename Context, typename Iter> inline bool _parse_object(Context& ctx, input<Iter>& in) {
if (! ctx.parse_object_start()) {
return false ;
}
if (in.expect('}' )) {
return true ;
}
do {
std::string key;
if (! in.expect('"' )
|| ! _parse_string(key, in)
|| ! in.expect(':' )) {
return false ;
}
if (! ctx.parse_object_item(in, key)) {
return false ;
}
} while (in.expect(',' ));
return in.expect('}' );
}
template <typename Iter> inline std::string _parse_number(input<Iter>& in) {
std::string num_str;
while (1) {
int ch = in.getc();
if (('0' <= ch && ch <= '9' ) || ch == '+' || ch == '-'
|| ch == 'e' || ch == 'E' ) {
num_str.push_back(ch);
} else if (ch == '.' ) {
#if PICOJSON_USE_LOCALE
num_str += localeconv()->decimal_point;
#else
num_str.push_back('.' );
#endif
} else {
in.ungetc();
break ;
}
}
return num_str;
}
template <typename Context, typename Iter> inline bool _parse(Context& ctx, input<Iter>& in) {
in.skip_ws();
int ch = in.getc();
switch (ch) {
#define IS(ch, text, op) case ch: \
if (in.match(text) && op) { \
return true ; \
} else { \
return false ; \
}
IS('n' , "ull" , ctx.set_null());
IS('f' , "alse" , ctx.set_bool(false ));
IS('t' , "rue" , ctx.set_bool(true ));
#undef IS
case '"' :
return ctx.parse_string(in);
case '[' :
return _parse_array(ctx, in);
case '{' :
return _parse_object(ctx, in);
default :
if (('0' <= ch && ch <= '9' ) || ch == '-' ) {
in.ungetc();
std::string num_str = _parse_number(in);
if (num_str.empty()) {
return false ;
}
#ifdef PICOJSON_USE_INT64
{
errno = 0;
char *endp;
intmax_t ival = strtoimax(num_str.c_str(), &endp, 10);
if (errno == 0
&& std::numeric_limits<int64_t>::min() <= ival
&& ival <= std::numeric_limits<int64_t>::max()
&& endp == num_str.c_str() + num_str.size()) {
ctx.set_int64(ival);
return true ;
}
}
#endif
return ctx.set_number(num_str);
}
break ;
}
in.ungetc();
return false ;
}
class deny_parse_context {
public :
bool set_null() { return false ; }
bool set_bool(bool ) { return false ; }
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t) { return false ; }
#endif
bool set_number(const std::string&) { return false ; }
template <typename Iter> bool parse_string(input<Iter>&) { return false ; }
bool parse_array_start() { return false ; }
template <typename Iter> bool parse_array_item(input<Iter>&, size_t) {
return false ;
}
bool parse_array_stop(size_t) { return false ; }
bool parse_object_start() { return false ; }
template <typename Iter> bool parse_object_item(input<Iter>&, const std::string&) {
return false ;
}
};
template <typename TraitsT>
class default_parse_context_t {
protected :
value_t<TraitsT>* out_;
public :
default_parse_context_t(value_t<TraitsT>* out) : out_(out) {}
bool set_null() {
*out_ = value_t<TraitsT>();
return true ;
}
bool set_bool(bool b) {
*out_ = value_t<TraitsT>(b);
return true ;
}
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t i) {
*out_ = value_t<TraitsT>(i);
return true ;
}
#endif
bool set_number(const std::string& s) {
std::pair<typename TraitsT::number_traits::value_type, bool > t = TraitsT::number_traits::from_str(s);
if (! t.second)
return false ;
*out_ = value_t<TraitsT>(t.first);
return true ;
}
template <typename Iter> bool parse_string(input<Iter>& in) {
*out_ = value_t<TraitsT>(string_type, false );
return _parse_string(out_->template get<std::string>(), in);
}
bool parse_array_start() {
*out_ = value_t<TraitsT>(array_type, false );
return true ;
}
template <typename Iter> bool parse_array_item(input<Iter>& in, size_t) {
typename value_t<TraitsT>::array& a = out_->template get<typename value_t<TraitsT>::array>();
a.push_back(value_t<TraitsT>());
default_parse_context_t ctx(&a.back());
return _parse(ctx, in);
}
bool parse_array_stop(size_t) { return true ; }
bool parse_object_start() {
*out_ = value_t<TraitsT>(object_type, false );
return true ;
}
template <typename Iter> bool parse_object_item(input<Iter>& in, const std::string& key) {
typename value_t<TraitsT>::object& o = out_->template get<typename value_t<TraitsT>::object>();
default_parse_context_t ctx(&o[key]);
return _parse(ctx, in);
}
private :
default_parse_context_t(const default_parse_context_t&);
default_parse_context_t& operator =(const default_parse_context_t&);
};
typedef default_parse_context_t<defaults::type_traits> default_parse_context;
class null_parse_context {
public :
struct dummy_str {
void push_back(int ) {}
};
public :
null_parse_context() {}
bool set_null() { return true ; }
bool set_bool(bool ) { return true ; }
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t) { return true ; }
#endif
bool set_number(const std::string&) { return true ; }
template <typename Iter> bool parse_string(input<Iter>& in) {
dummy_str s;
return _parse_string(s, in);
}
bool parse_array_start() { return true ; }
template <typename Iter> bool parse_array_item(input<Iter>& in, size_t) {
return _parse(*this , in);
}
bool parse_array_stop(size_t) { return true ; }
bool parse_object_start() { return true ; }
template <typename Iter> bool parse_object_item(input<Iter>& in, const std::string&) {
return _parse(*this , in);
}
private :
null_parse_context(const null_parse_context&);
null_parse_context& operator =(const null_parse_context&);
};
// obsolete, use the version below
template <typename Iter, typename TraitsT>
inline std::string parse(value_t<TraitsT>& out, Iter& pos, const Iter& last) {
std::string err;
pos = parse(out, pos, last, &err);
return err;
}
template <typename Context, typename Iter> inline Iter _parse(Context& ctx, const Iter& first, const Iter& last, std::string* err, bool * ungotc_check) {
input<Iter> in(first, last);
if (! _parse(ctx, in) && err != NULL) {
char buf[64];
SNPRINTF(buf, sizeof (buf), "syntax error at line %d near: " , in.line());
*err = buf;
while (1) {
int ch = in.getc();
if (ch == -1 || ch == '\n' ) {
break ;
} else if (ch >= ' ' ) {
err->push_back(ch);
}
}
}
if (in.check_ungot())
{
*ungotc_check = true ;
}
return in.cur();
}
template <typename Iter, typename TraitsT> inline Iter parse(value_t<TraitsT>& out, const Iter& first, const Iter& last, std::string* err, bool * ungotc_check) {
default_parse_context_t<TraitsT> ctx(&out);
return _parse(ctx, first, last, err, ungotc_check);
}
template <typename TraitsT>
inline std::string parse(value_t<TraitsT>& out, std::istream& is) {
std::string err;
parse(out, std::istreambuf_iterator<char >(is.rdbuf()),
std::istreambuf_iterator<char >(), &err);
return err;
}
template <typename T> struct last_error_t {
static std::string s;
};
template <typename T> std::string last_error_t<T>::s;
inline void set_last_error(const std::string& s) {
last_error_t<bool >::s = s;
}
inline const std::string& get_last_error() {
return last_error_t<bool >::s;
}
template <typename TraitsT>
inline bool operator ==(const value_t<TraitsT>& x, const value_t<TraitsT>& y) {
if (x.template is<null>())
return y.template is<null>();
#define PICOJSON_CMP(type) \
if (x.template is<type>()) \
return y.template is<type>() && x.template get<type>() == y.template get<type>()
PICOJSON_CMP(bool );
PICOJSON_CMP(typename value_t<TraitsT>::value);
PICOJSON_CMP(std::string);
PICOJSON_CMP(typename value_t<TraitsT>::array);
PICOJSON_CMP(typename value_t<TraitsT>::object);
#undef PICOJSON_CMP
PICOJSON_ASSERT(0);
#ifdef _MSC_VER
__assume(0);
#endif
return false ;
}
template <typename TraitsT>
inline bool operator !=(const value_t<TraitsT>& x, const value_t<TraitsT>& y) {
return ! (x == y);
}
template <typename TraitsT>
inline void swap(value_t<TraitsT>& x, value_t<TraitsT>& y) {
x.swap(y);
}
}
template <typename TraitsT>
inline std::istream& operator >>(std::istream& is, picojson::value_t<TraitsT>& x)
{
picojson::set_last_error(std::string());
std::string err = picojson::parse(x, is);
if (! err.empty()) {
picojson::set_last_error(err);
is.setstate(std::ios::failbit);
}
return is;
}
template <typename TraitsT>
inline std::ostream& operator <<(std::ostream& os, const picojson::value_t<TraitsT>& x)
{
x.serialize(std::ostream_iterator<char >(os));
return os;
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
#ifdef TEST_PICOJSON
#ifdef _MSC_VER
#pragma warning(disable : 4127) // conditional expression is constant
#endif
using namespace std;
static bool success = true ;
static int test_num = 0;
static void ok(bool b, const char * name = "" )
{
if (! b)
success = false ;
printf("%s %d - %s\n" , b ? "ok" : "ng" , ++test_num, name);
}
static void done_testing()
{
printf("1..%d\n" , test_num);
}
template <typename T> void is(const T& x, const T& y, const char * name = "" )
{
if (x == y) {
ok(true , name);
} else {
ok(false , name);
}
}
#include <algorithm>
#include <sstream>
#include <float .h>
#include <limits.h>
int main(void )
{
#if PICOJSON_USE_LOCALE
setlocale(LC_ALL, "" );
#endif
// constructors
#define TEST(expr, expected) \
is(picojson::value expr .serialize(), string(expected), "picojson::value" #expr )
TEST( (true ), "true" );
TEST( (false ), "false" );
TEST( (42.0), "42" );
TEST( (string("hello" )), "\" hello\"" );
TEST( ("hello" ), "\" hello\"" );
TEST( ("hello" , 4), "\" hell\"" );
{
double a = 1;
for (int i = 0; i < 1024; i++) {
picojson::value vi(a);
std::stringstream ss;
ss << vi;
picojson::value vo;
ss >> vo;
double b = vo.get<double >();
if ((i < 53 && a != b) || fabs(a - b) / b > 1e-8) {
printf("ng i=%d a=%.18e b=%.18e\n" , i, a, b);
}
a *= 2;
}
}
#undef TEST
#define TEST(in, type, cmp, serialize_test) { \
picojson::value v; \
const char * s = in; \
string err = picojson::parse(v, s, s + strlen(s)); \
ok(err.empty(), in " no error" ); \
ok(v.is<type>(), in " check type" ); \
is<type>(v.get<type>(), cmp, in " correct output" ); \
is(*s, '\0' , in " read to eof" ); \
if (serialize_test) { \
is(v.serialize(), string(in), in " serialize" ); \
} \
}
TEST("false" , bool , false , true );
TEST("true" , bool , true , true );
TEST("90.5" , double , 90.5, false );
TEST("1.7976931348623157e+308" , double , DBL_MAX, false );
TEST("\" hello\"" , string, string("hello" ), true );
TEST("\" \\\"\\\\\\/\\b\\f\\n\\r\\t\" ", string, string(" \"\\/\b\f\n\r\t" ),
true );
TEST("\" \\u0061\\u30af\\u30ea\\u30b9\"" , string,
string("a\xe3\x82\xaf\xe3\x83\xaa\xe3\x82\xb9" ), false );
TEST("\" \\ud840\\udc0b\"" , string, string("\xf0\xa0\x80\x8b" ), false );
#ifdef PICOJSON_USE_INT64
TEST("0" , int64_t, 0, true );
TEST("-9223372036854775808" , int64_t, std::numeric_limits<int64_t>::min(), true );
TEST("9223372036854775807" , int64_t, std::numeric_limits<int64_t>::max(), true );
#endif
#undef TEST
#define TEST(type, expr) { \
picojson::value v; \
const char *s = expr; \
string err = picojson::parse(v, s, s + strlen(s)); \
ok(err.empty(), "empty " #type " no error" ); \
ok(v.is<picojson::type>(), "empty " #type " check type" ); \
ok(v.get<picojson::type>().empty(), "check " #type " array size" ); \
}
TEST(array, "[]" );
TEST(object, "{}" );
#undef TEST
{
picojson::value v;
const char *s = "[1,true,\" hello\"]" ;
string err = picojson::parse(v, s, s + strlen(s));
ok(err.empty(), "array no error" );
ok(v.is<picojson::array>(), "array check type" );
is(v.get<picojson::array>().size(), size_t(3), "check array size" );
ok(v.contains(0), "check contains array[0]" );
ok(v.get(0).is<double >(), "check array[0] type" );
is(v.get(0).get<double >(), 1.0, "check array[0] value" );
ok(v.contains(1), "check contains array[1]" );
ok(v.get(1).is<bool >(), "check array[1] type" );
ok(v.get(1).get<bool >(), "check array[1] value" );
ok(v.contains(2), "check contains array[2]" );
ok(v.get(2).is<string>(), "check array[2] type" );
is(v.get(2).get<string>(), string("hello" ), "check array[2] value" );
ok(!v.contains(3), "check not contains array[3]" );
}
{
picojson::value v;
const char *s = "{ \" a\": true }" ;
string err = picojson::parse(v, s, s + strlen(s));
ok(err.empty(), "object no error" );
ok(v.is<picojson::object>(), "object check type" );
is(v.get<picojson::object>().size(), size_t(1), "check object size" );
ok(v.contains("a" ), "check contains property" );
ok(v.get("a" ).is<bool >(), "check bool property exists" );
is(v.get("a" ).get<bool >(), true , "check bool property value" );
is(v.serialize(), string("{\" a\":true}" ), "serialize object" );
ok(!v.contains("z" ), "check not contains property" );
}
#define TEST(json, msg) do { \
picojson::value v; \
const char *s = json; \
string err = picojson::parse(v, s, s + strlen(s)); \
is(err, string("syntax error at line " msg), msg); \
} while (0)
TEST("falsoa" , "1 near: oa" );
TEST("{]" , "1 near: ]" );
TEST("\n\bbell" , "2 near: bell" );
TEST("\" abc\nd\"" , "1 near: " );
#undef TEST
{
picojson::value v1, v2;
const char *s;
string err;
s = "{ \" b\": true, \" a\": [1,2,\" three\"], \" d\": 2 }" ;
err = picojson::parse(v1, s, s + strlen(s));
s = "{ \" d\": 2.0, \" b\": true, \" a\": [1,2,\" three\"] }" ;
err = picojson::parse(v2, s, s + strlen(s));
ok((v1 == v2), "check == operator in deep comparison" );
}
{
picojson::value v1, v2;
const char *s;
string err;
s = "{ \" b\": true, \" a\": [1,2,\" three\"], \" d\": 2 }" ;
err = picojson::parse(v1, s, s + strlen(s));
s = "{ \" d\": 2.0, \" a\": [1,\" three\"], \" b\": true }" ;
err = picojson::parse(v2, s, s + strlen(s));
ok((v1 != v2), "check != operator for array in deep comparison" );
}
{
picojson::value v1, v2;
const char *s;
string err;
s = "{ \" b\": true, \" a\": [1,2,\" three\"], \" d\": 2 }" ;
err = picojson::parse(v1, s, s + strlen(s));
s = "{ \" d\": 2.0, \" a\": [1,2,\" three\"], \" b\": false }" ;
err = picojson::parse(v2, s, s + strlen(s));
ok((v1 != v2), "check != operator for object in deep comparison" );
}
{
picojson::value v1, v2;
const char *s;
string err;
s = "{ \" b\": true, \" a\": [1,2,\" three\"], \" d\": 2 }" ;
err = picojson::parse(v1, s, s + strlen(s));
picojson::object& o = v1.get<picojson::object>();
o.erase("b" );
picojson::array& a = o["a" ].get<picojson::array>();
picojson::array::iterator i;
i = std::remove(a.begin(), a.end(), picojson::value(std::string("three" )));
a.erase(i, a.end());
s = "{ \" a\": [1,2], \" d\": 2 }" ;
err = picojson::parse(v2, s, s + strlen(s));
ok((v1 == v2), "check erase()" );
}
ok(picojson::value(3.0).serialize() == "3" ,
"integral number should be serialized as a integer" );
{
const char * s = "{ \" a\": [1,2], \" d\": 2 }" ;
picojson::null_parse_context ctx;
string err;
picojson::_parse(ctx, s, s + strlen(s), &err);
ok(err.empty(), "null_parse_context" );
}
{
picojson::value v1, v2;
v1 = picojson::value(true );
swap(v1, v2);
ok(v1.is<picojson::null>(), "swap (null)" );
ok(v2.get<bool >() == true , "swap (bool)" );
v1 = picojson::value("a" );
v2 = picojson::value(1.0);
swap(v1, v2);
ok(v1.get<double >() == 1.0, "swap (dobule)" );
ok(v2.get<string>() == "a" , "swap (string)" );
v1 = picojson::value(picojson::object());
v2 = picojson::value(picojson::array());
swap(v1, v2);
ok(v1.is<picojson::array>(), "swap (array)" );
ok(v2.is<picojson::object>(), "swap (object)" );
}
{
picojson::value v;
const char *s = "{ \" a\": 1, \" b\": [ 2, { \" b1\": \" abc\" } ], \" c\": {}, \" d\": [] }" ;
string err;
err = picojson::parse(v, s, s + strlen(s));
ok(err.empty(), "parse test data for prettifying output" );
ok(v.serialize() == "{\" a\":1,\" b\":[2,{\" b1\":\" abc\"}],\" c\":{},\" d\":[]}" , "non-prettifying output" );
ok(v.serialize(true ) == "{\n \" a\": 1,\n \" b\": [\n 2,\n {\n \" b1\": \" abc\"\n }\n ],\n \" c\": {},\n \" d\": []\n}\n" , "prettifying output" );
}
try {
picojson::value v(std::numeric_limits<double >::quiet_NaN());
ok(false , "should not accept NaN" );
} catch (std::overflow_error e) {
ok(true , "should not accept NaN" );
}
try {
picojson::value v(std::numeric_limits<double >::infinity());
ok(false , "should not accept infinity" );
} catch (std::overflow_error e) {
ok(true , "should not accept infinity" );
}
try {
picojson::value v(123.);
ok(! v.is<bool >(), "is() should return false" );
v.get<bool >();
ok(false , "get() should raise an error" );
} catch (std::runtime_error e) {
ok(true , "get() should raise an error" );
}
#ifdef PICOJSON_USE_INT64
{
picojson::value v1((int64_t)123);
ok(v1.is<int64_t>(), "is int64_t" );
ok(v1.is<double >(), "is double as well" );
ok(v1.serialize() == "123" , "serialize the value" );
ok(v1.get<int64_t>() == 123, "value is correct as int64_t" );
ok(v1.get<double >(), "value is correct as double" );
ok(! v1.is<int64_t>(), "is no more int64_type once get() is called" );
ok(v1.is<double >(), "and is still a double" );
const char *s = "-9223372036854775809" ;
ok(picojson::parse(v1, s, s + strlen(s)).empty(), "parse underflowing int64_t" );
ok(! v1.is<int64_t>(), "underflowing int is not int64_t" );
ok(v1.is<double >(), "underflowing int is double" );
ok(v1.get<double >() + 9.22337203685478e+18 < 65536, "double value is somewhat correct" );
}
#endif
done_testing();
return success ? 0 : 1;
}
#endif
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