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dawn-cmake/third_party/picojson/picojson.h

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/*
* 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 <cstddef>
#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
#ifndef PICOJSON_USE_RVALUE_REFERENCE
# if (defined(__cpp_rvalue_references) && __cpp_rvalue_references >= 200610) || (defined(_MSC_VER) && _MSC_VER >= 1600)
# define PICOJSON_USE_RVALUE_REFERENCE 1
# else
# define PICOJSON_USE_RVALUE_REFERENCE 0
# endif
#endif//PICOJSON_USE_RVALUE_REFERENCE
// 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 {};
class value {
public:
typedef std::vector<value> array;
typedef std::map<std::string, value> object;
union _storage {
bool boolean_;
double number_;
#ifdef PICOJSON_USE_INT64
int64_t int64_;
#endif
std::string* string_;
array* array_;
object* object_;
};
protected:
int type_;
_storage u_;
public:
value();
value(int type, bool);
explicit value(bool b);
#ifdef PICOJSON_USE_INT64
explicit value(int64_t i);
#endif
explicit value(double n);
explicit value(const std::string& s);
explicit value(const array& a);
explicit value(const object& o);
explicit value(const char* s);
value(const char* s, size_t len);
~value();
value(const value& x);
value& operator=(const value& x);
#if PICOJSON_USE_RVALUE_REFERENCE
value(value&& x)throw();
value& operator=(value&& x)throw();
#endif
void swap(value& x)throw();
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& get(size_t idx) const;
const value& get(const std::string& key) const;
value& get(size_t idx);
value& 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(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::array array;
typedef value::object object;
inline value::value() : type_(null_type) {}
inline value::value(int type, bool) : type_(type) {
switch (type) {
#define INIT(p, v) case p##type: u_.p = v; break
INIT(boolean_, false);
INIT(number_, 0.0);
#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;
}
}
inline value::value(bool b) : type_(boolean_type) {
u_.boolean_ = b;
}
#ifdef PICOJSON_USE_INT64
inline value::value(int64_t i) : type_(int64_type) {
u_.int64_ = i;
}
#endif
inline value::value(double n) : type_(number_type) {
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("");
}
u_.number_ = n;
}
inline value::value(const std::string& s) : type_(string_type) {
u_.string_ = new std::string(s);
}
inline value::value(const array& a) : type_(array_type) {
u_.array_ = new array(a);
}
inline value::value(const object& o) : type_(object_type) {
u_.object_ = new object(o);
}
inline value::value(const char* s) : type_(string_type) {
u_.string_ = new std::string(s);
}
inline value::value(const char* s, size_t len) : type_(string_type) {
u_.string_ = new std::string(s, len);
}
inline value::~value() {
switch (type_) {
#define DEINIT(p) case p##type: delete u_.p; break
DEINIT(string_);
DEINIT(array_);
DEINIT(object_);
#undef DEINIT
default: break;
}
}
inline value::value(const value& x) : type_(x.type_) {
switch (type_) {
#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;
}
}
inline value& value::operator=(const value& x) {
if (this != &x) {
value t(x);
swap(t);
}
return *this;
}
#if PICOJSON_USE_RVALUE_REFERENCE
inline value::value(value&& x)throw() : type_(null_type) {
swap(x);
}
inline value& value::operator=(value&& x)throw() {
swap(x);
return *this;
}
#endif
inline void value::swap(value& x)throw() {
std::swap(type_, x.type_);
std::swap(u_, x.u_);
}
#define IS(ctype, jtype) \
template <> inline bool value::is<ctype>() const { \
return type_ == jtype##_type; \
}
IS(null, null)
IS(bool, boolean)
#ifdef PICOJSON_USE_INT64
IS(int64_t, int64)
#endif
IS(std::string, string)
IS(array, array)
IS(object, object)
#undef IS
template <> inline bool value::is<double>() const {
return type_ == number_type
#ifdef PICOJSON_USE_INT64
|| type_ == int64_type
#endif
;
}
#define GET(ctype, var) \
template <> inline const ctype& value::get<ctype>() const { \
PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" \
&& is<ctype>()); \
return var; \
} \
template <> inline ctype& value::get<ctype>() { \
PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" \
&& is<ctype>()); \
return var; \
}
GET(bool, u_.boolean_)
GET(std::string, *u_.string_)
GET(array, *u_.array_)
GET(object, *u_.object_)
#ifdef PICOJSON_USE_INT64
GET(double, (type_ == int64_type && (const_cast<value*>(this)->type_ = number_type, const_cast<value*>(this)->u_.number_ = u_.int64_), u_.number_))
GET(int64_t, u_.int64_)
#else
GET(double, u_.number_)
#endif
#undef GET
inline bool value::evaluate_as_boolean() const {
switch (type_) {
case null_type:
return false;
case boolean_type:
return u_.boolean_;
case number_type:
return u_.number_ != 0;
#ifdef PICOJSON_USE_INT64
case int64_type:
return u_.int64_ != 0;
#endif
case string_type:
return ! u_.string_->empty();
default:
return true;
}
}
inline const value& value::get(size_t idx) const {
static value s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
inline value& value::get(size_t idx) {
static value s_null;
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
}
inline const value& value::get(const std::string& key) const {
static value s_null;
PICOJSON_ASSERT(is<object>());
object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
inline value& value::get(const std::string& key) {
static value s_null;
PICOJSON_ASSERT(is<object>());
object::iterator i = u_.object_->find(key);
return i != u_.object_->end() ? i->second : s_null;
}
inline bool value::contains(size_t idx) const {
PICOJSON_ASSERT(is<array>());
return idx < u_.array_->size();
}
inline bool value::contains(const std::string& key) const {
PICOJSON_ASSERT(is<object>());
object::const_iterator i = u_.object_->find(key);
return i != u_.object_->end();
}
inline std::string value::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: {
char buf[256];
double tmp;
SNPRINTF(buf, sizeof(buf), fabs(u_.number_) < (1ULL << 53) && modf(u_.number_, &tmp) == 0 ? "%.f" : "%.17g", u_.number_);
#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;
}
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 Iter> void value::serialize(Iter oi, bool prettify) const {
return _serialize(oi, prettify ? 0 : -1);
}
inline std::string value::serialize(bool prettify) const {
return _serialize(prettify ? 0 : -1);
}
template <typename Iter> void value::_indent(Iter oi, int indent) {
*oi++ = '\n';
for (int i = 0; i < indent * INDENT_WIDTH; ++i) {
*oi++ = ' ';
}
}
template <typename Iter> void value::_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 (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 (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';
}
}
inline std::string value::_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:
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 == '-') {
double f;
char *endp;
in.ungetc();
std::string num_str = _parse_number(in);
if (num_str.empty()) {
return false;
}
#ifdef PICOJSON_USE_INT64
{
errno = 0;
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
f = strtod(num_str.c_str(), &endp);
if (endp == num_str.c_str() + num_str.size()) {
ctx.set_number(f);
return true;
}
return false;
}
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(double) { 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;
}
};
class default_parse_context {
protected:
value* out_;
public:
default_parse_context(value* out) : out_(out) {}
bool set_null() {
*out_ = value();
return true;
}
bool set_bool(bool b) {
*out_ = value(b);
return true;
}
#ifdef PICOJSON_USE_INT64
bool set_int64(int64_t i) {
*out_ = value(i);
return true;
}
#endif
bool set_number(double f) {
*out_ = value(f);
return true;
}
template<typename Iter> bool parse_string(input<Iter>& in) {
*out_ = value(string_type, false);
return _parse_string(out_->get<std::string>(), in);
}
bool parse_array_start() {
*out_ = value(array_type, false);
return true;
}
template <typename Iter> bool parse_array_item(input<Iter>& in, size_t) {
array& a = out_->get<array>();
a.push_back(value());
default_parse_context ctx(&a.back());
return _parse(ctx, in);
}
bool parse_array_stop(size_t) { return true; }
bool parse_object_start() {
*out_ = value(object_type, false);
return true;
}
template <typename Iter> bool parse_object_item(input<Iter>& in, const std::string& key) {
object& o = out_->get<object>();
default_parse_context ctx(&o[key]);
return _parse(ctx, in);
}
private:
default_parse_context(const default_parse_context&);
default_parse_context& operator=(const 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(double) { 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> inline std::string parse(value& 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) {
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);
}
}
}
return in.cur();
}
template <typename Iter> inline Iter parse(value& out, const Iter& first, const Iter& last, std::string* err) {
default_parse_context ctx(&out);
return _parse(ctx, first, last, err);
}
inline std::string parse(value& out, const std::string& s) {
std::string err;
parse(out, s.begin(), s.end(), &err);
return err;
}
inline std::string parse(value& 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;
}
inline bool operator==(const value& x, const value& y) {
if (x.is<null>())
return y.is<null>();
#define PICOJSON_CMP(type) \
if (x.is<type>()) \
return y.is<type>() && x.get<type>() == y.get<type>()
PICOJSON_CMP(bool);
PICOJSON_CMP(double);
PICOJSON_CMP(std::string);
PICOJSON_CMP(array);
PICOJSON_CMP(object);
#undef PICOJSON_CMP
PICOJSON_ASSERT(0);
#ifdef _MSC_VER
__assume(0);
#endif
return false;
}
inline bool operator!=(const value& x, const value& y) {
return ! (x == y);
}
}
#if !PICOJSON_USE_RVALUE_REFERENCE
namespace std {
template<> inline void swap(picojson::value& x, picojson::value& y)
{
x.swap(y);
}
}
#endif
inline std::istream& operator>>(std::istream& is, picojson::value& 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;
}
inline std::ostream& operator<<(std::ostream& os, const picojson::value& x)
{
x.serialize(std::ostream_iterator<char>(os));
return os;
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
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