1201 lines
33 KiB
C++
1201 lines
33 KiB
C++
/*
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* Copyright 2009-2010 Cybozu Labs, Inc.
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* Copyright 2011-2014 Kazuho Oku
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef picojson_h
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#define picojson_h
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#include <algorithm>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <cstddef>
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#include <iostream>
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#include <iterator>
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#include <limits>
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#include <map>
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#include <stdexcept>
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#include <string>
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#include <vector>
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#include <utility>
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// for isnan/isinf
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#if __cplusplus >= 201103L
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#include <cmath>
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#else
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extern "C" {
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#ifdef _MSC_VER
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#include <float.h>
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#elif defined(__INTEL_COMPILER)
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#include <mathimf.h>
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#else
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#include <math.h>
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#endif
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}
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#endif
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#ifndef PICOJSON_USE_RVALUE_REFERENCE
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#if (defined(__cpp_rvalue_references) && __cpp_rvalue_references >= 200610) || (defined(_MSC_VER) && _MSC_VER >= 1600)
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#define PICOJSON_USE_RVALUE_REFERENCE 1
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#else
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#define PICOJSON_USE_RVALUE_REFERENCE 0
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#endif
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#endif // PICOJSON_USE_RVALUE_REFERENCE
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#ifndef PICOJSON_NOEXCEPT
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#if PICOJSON_USE_RVALUE_REFERENCE
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#define PICOJSON_NOEXCEPT noexcept
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#else
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#define PICOJSON_NOEXCEPT throw()
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#endif
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#endif
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// experimental support for int64_t (see README.mkdn for detail)
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#ifdef PICOJSON_USE_INT64
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#define __STDC_FORMAT_MACROS
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#include <cerrno>
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#if __cplusplus >= 201103L
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#include <cinttypes>
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#else
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extern "C" {
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#include <inttypes.h>
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}
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#endif
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#endif
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// to disable the use of localeconv(3), set PICOJSON_USE_LOCALE to 0
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#ifndef PICOJSON_USE_LOCALE
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#define PICOJSON_USE_LOCALE 1
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#endif
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#if PICOJSON_USE_LOCALE
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extern "C" {
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#include <locale.h>
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}
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#endif
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#ifndef PICOJSON_ASSERT
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#define PICOJSON_ASSERT(e) \
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do { \
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if (!(e)) \
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throw std::runtime_error(#e); \
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} while (0)
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#endif
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#ifdef _MSC_VER
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#define SNPRINTF _snprintf_s
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#pragma warning(push)
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#pragma warning(disable : 4244) // conversion from int to char
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#pragma warning(disable : 4127) // conditional expression is constant
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#pragma warning(disable : 4702) // unreachable code
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#pragma warning(disable : 4706) // assignment within conditional expression
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#else
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#define SNPRINTF snprintf
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#endif
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namespace picojson {
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enum {
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null_type,
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boolean_type,
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number_type,
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string_type,
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array_type,
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object_type
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#ifdef PICOJSON_USE_INT64
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,
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int64_type
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#endif
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};
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enum { INDENT_WIDTH = 2, DEFAULT_MAX_DEPTHS = 100 };
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struct null {};
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class value {
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public:
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typedef std::vector<value> array;
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typedef std::map<std::string, value> object;
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union _storage {
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bool boolean_;
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double number_;
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#ifdef PICOJSON_USE_INT64
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int64_t int64_;
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#endif
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std::string *string_;
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array *array_;
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object *object_;
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};
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protected:
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int type_;
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_storage u_;
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public:
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value();
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value(int type, bool);
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explicit value(bool b);
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#ifdef PICOJSON_USE_INT64
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explicit value(int64_t i);
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#endif
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explicit value(double n);
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explicit value(const std::string &s);
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explicit value(const array &a);
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explicit value(const object &o);
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#if PICOJSON_USE_RVALUE_REFERENCE
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explicit value(std::string &&s);
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explicit value(array &&a);
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explicit value(object &&o);
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#endif
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explicit value(const char *s);
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value(const char *s, size_t len);
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~value();
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value(const value &x);
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value &operator=(const value &x);
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#if PICOJSON_USE_RVALUE_REFERENCE
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value(value &&x) PICOJSON_NOEXCEPT;
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value &operator=(value &&x) PICOJSON_NOEXCEPT;
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#endif
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void swap(value &x) PICOJSON_NOEXCEPT;
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template <typename T> bool is() const;
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template <typename T> const T &get() const;
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template <typename T> T &get();
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template <typename T> void set(const T &);
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#if PICOJSON_USE_RVALUE_REFERENCE
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template <typename T> void set(T &&);
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#endif
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bool evaluate_as_boolean() const;
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const value &get(const size_t idx) const;
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const value &get(const std::string &key) const;
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value &get(const size_t idx);
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value &get(const std::string &key);
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bool contains(const size_t idx) const;
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bool contains(const std::string &key) const;
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std::string to_str() const;
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template <typename Iter> void serialize(Iter os, bool prettify = false) const;
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std::string serialize(bool prettify = false) const;
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private:
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template <typename T> value(const T *); // intentionally defined to block implicit conversion of pointer to bool
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template <typename Iter> static void _indent(Iter os, int indent);
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template <typename Iter> void _serialize(Iter os, int indent) const;
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std::string _serialize(int indent) const;
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void clear();
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};
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typedef value::array array;
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typedef value::object object;
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inline value::value() : type_(null_type), u_() {
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}
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inline value::value(int type, bool) : type_(type), u_() {
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switch (type) {
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#define INIT(p, v) \
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case p##type: \
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u_.p = v; \
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break
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INIT(boolean_, false);
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INIT(number_, 0.0);
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#ifdef PICOJSON_USE_INT64
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INIT(int64_, 0);
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#endif
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INIT(string_, new std::string());
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INIT(array_, new array());
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INIT(object_, new object());
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#undef INIT
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default:
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break;
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}
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}
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inline value::value(bool b) : type_(boolean_type), u_() {
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u_.boolean_ = b;
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}
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#ifdef PICOJSON_USE_INT64
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inline value::value(int64_t i) : type_(int64_type), u_() {
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u_.int64_ = i;
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}
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#endif
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inline value::value(double n) : type_(number_type), u_() {
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if (
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#ifdef _MSC_VER
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!_finite(n)
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#elif __cplusplus >= 201103L
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std::isnan(n) || std::isinf(n)
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#else
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isnan(n) || isinf(n)
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#endif
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) {
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throw std::overflow_error("");
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}
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u_.number_ = n;
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}
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inline value::value(const std::string &s) : type_(string_type), u_() {
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u_.string_ = new std::string(s);
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}
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inline value::value(const array &a) : type_(array_type), u_() {
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u_.array_ = new array(a);
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}
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inline value::value(const object &o) : type_(object_type), u_() {
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u_.object_ = new object(o);
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}
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#if PICOJSON_USE_RVALUE_REFERENCE
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inline value::value(std::string &&s) : type_(string_type), u_() {
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u_.string_ = new std::string(std::move(s));
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}
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inline value::value(array &&a) : type_(array_type), u_() {
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u_.array_ = new array(std::move(a));
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}
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inline value::value(object &&o) : type_(object_type), u_() {
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u_.object_ = new object(std::move(o));
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}
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#endif
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inline value::value(const char *s) : type_(string_type), u_() {
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u_.string_ = new std::string(s);
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}
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inline value::value(const char *s, size_t len) : type_(string_type), u_() {
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u_.string_ = new std::string(s, len);
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}
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inline void value::clear() {
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switch (type_) {
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#define DEINIT(p) \
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case p##type: \
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delete u_.p; \
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break
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DEINIT(string_);
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DEINIT(array_);
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DEINIT(object_);
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#undef DEINIT
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default:
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break;
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}
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}
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inline value::~value() {
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clear();
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}
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inline value::value(const value &x) : type_(x.type_), u_() {
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switch (type_) {
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#define INIT(p, v) \
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case p##type: \
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u_.p = v; \
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break
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INIT(string_, new std::string(*x.u_.string_));
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INIT(array_, new array(*x.u_.array_));
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INIT(object_, new object(*x.u_.object_));
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#undef INIT
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default:
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u_ = x.u_;
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break;
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}
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}
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inline value &value::operator=(const value &x) {
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if (this != &x) {
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value t(x);
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swap(t);
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}
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return *this;
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}
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#if PICOJSON_USE_RVALUE_REFERENCE
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inline value::value(value &&x) PICOJSON_NOEXCEPT : type_(null_type), u_() {
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swap(x);
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}
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inline value &value::operator=(value &&x) PICOJSON_NOEXCEPT {
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swap(x);
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return *this;
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}
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#endif
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inline void value::swap(value &x) PICOJSON_NOEXCEPT {
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std::swap(type_, x.type_);
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std::swap(u_, x.u_);
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}
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#define IS(ctype, jtype) \
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template <> inline bool value::is<ctype>() const { \
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return type_ == jtype##_type; \
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}
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IS(null, null)
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IS(bool, boolean)
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#ifdef PICOJSON_USE_INT64
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IS(int64_t, int64)
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#endif
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IS(std::string, string)
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IS(array, array)
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IS(object, object)
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#undef IS
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template <> inline bool value::is<double>() const {
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return type_ == number_type
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#ifdef PICOJSON_USE_INT64
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|| type_ == int64_type
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#endif
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;
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}
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#define GET(ctype, var) \
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template <> inline const ctype &value::get<ctype>() const { \
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PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" && is<ctype>()); \
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return var; \
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} \
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template <> inline ctype &value::get<ctype>() { \
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PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" && is<ctype>()); \
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return var; \
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}
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GET(bool, u_.boolean_)
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GET(std::string, *u_.string_)
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GET(array, *u_.array_)
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GET(object, *u_.object_)
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#ifdef PICOJSON_USE_INT64
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GET(double,
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(type_ == int64_type && (const_cast<value *>(this)->type_ = number_type, (const_cast<value *>(this)->u_.number_ = u_.int64_)),
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u_.number_))
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GET(int64_t, u_.int64_)
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#else
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GET(double, u_.number_)
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#endif
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#undef GET
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#define SET(ctype, jtype, setter) \
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template <> inline void value::set<ctype>(const ctype &_val) { \
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clear(); \
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type_ = jtype##_type; \
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setter \
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}
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SET(bool, boolean, u_.boolean_ = _val;)
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SET(std::string, string, u_.string_ = new std::string(_val);)
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SET(array, array, u_.array_ = new array(_val);)
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SET(object, object, u_.object_ = new object(_val);)
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SET(double, number, u_.number_ = _val;)
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#ifdef PICOJSON_USE_INT64
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SET(int64_t, int64, u_.int64_ = _val;)
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#endif
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#undef SET
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#if PICOJSON_USE_RVALUE_REFERENCE
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#define MOVESET(ctype, jtype, setter) \
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template <> inline void value::set<ctype>(ctype && _val) { \
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clear(); \
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type_ = jtype##_type; \
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setter \
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}
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MOVESET(std::string, string, u_.string_ = new std::string(std::move(_val));)
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MOVESET(array, array, u_.array_ = new array(std::move(_val));)
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MOVESET(object, object, u_.object_ = new object(std::move(_val));)
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#undef MOVESET
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#endif
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inline bool value::evaluate_as_boolean() const {
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switch (type_) {
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case null_type:
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return false;
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case boolean_type:
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return u_.boolean_;
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case number_type:
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return u_.number_ != 0;
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#ifdef PICOJSON_USE_INT64
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case int64_type:
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return u_.int64_ != 0;
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#endif
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case string_type:
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return !u_.string_->empty();
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default:
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return true;
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}
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}
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inline const value &value::get(const size_t idx) const {
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static value s_null;
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PICOJSON_ASSERT(is<array>());
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return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
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}
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inline value &value::get(const size_t idx) {
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static value s_null;
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PICOJSON_ASSERT(is<array>());
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return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null;
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}
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inline const value &value::get(const std::string &key) const {
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static value s_null;
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PICOJSON_ASSERT(is<object>());
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object::const_iterator i = u_.object_->find(key);
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return i != u_.object_->end() ? i->second : s_null;
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}
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inline value &value::get(const std::string &key) {
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static value s_null;
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PICOJSON_ASSERT(is<object>());
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object::iterator i = u_.object_->find(key);
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return i != u_.object_->end() ? i->second : s_null;
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}
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inline bool value::contains(const size_t idx) const {
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PICOJSON_ASSERT(is<array>());
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return idx < u_.array_->size();
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}
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inline bool value::contains(const std::string &key) const {
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PICOJSON_ASSERT(is<object>());
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object::const_iterator i = u_.object_->find(key);
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return i != u_.object_->end();
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}
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inline std::string value::to_str() const {
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switch (type_) {
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case null_type:
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return "null";
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case boolean_type:
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return u_.boolean_ ? "true" : "false";
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#ifdef PICOJSON_USE_INT64
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case int64_type: {
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char buf[sizeof("-9223372036854775808")];
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SNPRINTF(buf, sizeof(buf), "%" PRId64, u_.int64_);
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return buf;
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}
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#endif
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case number_type: {
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char buf[256];
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double tmp;
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SNPRINTF(buf, sizeof(buf), fabs(u_.number_) < (1ULL << 53) && modf(u_.number_, &tmp) == 0 ? "%.f" : "%.17g", u_.number_);
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#if PICOJSON_USE_LOCALE
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char *decimal_point = localeconv()->decimal_point;
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if (strcmp(decimal_point, ".") != 0) {
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size_t decimal_point_len = strlen(decimal_point);
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for (char *p = buf; *p != '\0'; ++p) {
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if (strncmp(p, decimal_point, decimal_point_len) == 0) {
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return std::string(buf, p) + "." + (p + decimal_point_len);
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}
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}
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}
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#endif
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return buf;
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}
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case string_type:
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return *u_.string_;
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case array_type:
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return "array";
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case object_type:
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return "object";
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default:
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PICOJSON_ASSERT(0);
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#ifdef _MSC_VER
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__assume(0);
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#endif
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}
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return std::string();
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}
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template <typename Iter> void copy(const std::string &s, Iter oi) {
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std::copy(s.begin(), s.end(), oi);
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}
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|
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template <typename Iter> struct serialize_str_char {
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Iter oi;
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void operator()(char c) {
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switch (c) {
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#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>(c) < 0x20 || c == 0x7f) {
|
|
char buf[7];
|
|
SNPRINTF(buf, sizeof(buf), "\\u%04x", c & 0xff);
|
|
copy(buf, buf + 6, oi);
|
|
} else {
|
|
*oi++ = c;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename Iter> void serialize_str(const std::string &s, Iter oi) {
|
|
*oi++ = '"';
|
|
serialize_str_char<Iter> process_char = {oi};
|
|
std::for_each(s.begin(), s.end(), process_char);
|
|
*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_;
|
|
bool consumed_;
|
|
int line_;
|
|
|
|
public:
|
|
input(const Iter &first, const Iter &last) : cur_(first), end_(last), consumed_(false), line_(1) {
|
|
}
|
|
int getc() {
|
|
if (consumed_) {
|
|
if (*cur_ == '\n') {
|
|
++line_;
|
|
}
|
|
++cur_;
|
|
}
|
|
if (cur_ == end_) {
|
|
consumed_ = false;
|
|
return -1;
|
|
}
|
|
consumed_ = true;
|
|
return *cur_ & 0xff;
|
|
}
|
|
void ungetc() {
|
|
consumed_ = false;
|
|
}
|
|
Iter cur() const {
|
|
if (consumed_) {
|
|
input<Iter> *self = const_cast<input<Iter> *>(this);
|
|
self->consumed_ = false;
|
|
++self->cur_;
|
|
}
|
|
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(const int expected) {
|
|
skip_ws();
|
|
if (getc() != expected) {
|
|
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(static_cast<char>(uni_ch));
|
|
} else {
|
|
if (uni_ch < 0x800) {
|
|
out.push_back(static_cast<char>(0xc0 | (uni_ch >> 6)));
|
|
} else {
|
|
if (uni_ch < 0x10000) {
|
|
out.push_back(static_cast<char>(0xe0 | (uni_ch >> 12)));
|
|
} else {
|
|
out.push_back(static_cast<char>(0xf0 | (uni_ch >> 18)));
|
|
out.push_back(static_cast<char>(0x80 | ((uni_ch >> 12) & 0x3f)));
|
|
}
|
|
out.push_back(static_cast<char>(0x80 | ((uni_ch >> 6) & 0x3f)));
|
|
}
|
|
out.push_back(static_cast<char>(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(static_cast<char>(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 ctx.parse_object_stop();
|
|
}
|
|
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('}') && ctx.parse_object_stop();
|
|
}
|
|
|
|
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(static_cast<char>(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_;
|
|
size_t depths_;
|
|
|
|
public:
|
|
default_parse_context(value *out, size_t depths = DEFAULT_MAX_DEPTHS) : out_(out), depths_(depths) {
|
|
}
|
|
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() {
|
|
if (depths_ == 0)
|
|
return false;
|
|
--depths_;
|
|
*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(), depths_);
|
|
return _parse(ctx, in);
|
|
}
|
|
bool parse_array_stop(size_t) {
|
|
++depths_;
|
|
return true;
|
|
}
|
|
bool parse_object_start() {
|
|
if (depths_ == 0)
|
|
return false;
|
|
*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], depths_);
|
|
return _parse(ctx, in);
|
|
}
|
|
bool parse_object_stop() {
|
|
++depths_;
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
default_parse_context(const default_parse_context &);
|
|
default_parse_context &operator=(const default_parse_context &);
|
|
};
|
|
|
|
class null_parse_context {
|
|
protected:
|
|
size_t depths_;
|
|
|
|
public:
|
|
struct dummy_str {
|
|
void push_back(int) {
|
|
}
|
|
};
|
|
|
|
public:
|
|
null_parse_context(size_t depths = DEFAULT_MAX_DEPTHS) : depths_(depths) {
|
|
}
|
|
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() {
|
|
if (depths_ == 0)
|
|
return false;
|
|
--depths_;
|
|
return true;
|
|
}
|
|
template <typename Iter> bool parse_array_item(input<Iter> &in, size_t) {
|
|
return _parse(*this, in);
|
|
}
|
|
bool parse_array_stop(size_t) {
|
|
++depths_;
|
|
return true;
|
|
}
|
|
bool parse_object_start() {
|
|
if (depths_ == 0)
|
|
return false;
|
|
--depths_;
|
|
return true;
|
|
}
|
|
template <typename Iter> bool parse_object_item(input<Iter> &in, const std::string &) {
|
|
++depths_;
|
|
return _parse(*this, in);
|
|
}
|
|
bool parse_object_stop() {
|
|
return true;
|
|
}
|
|
|
|
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(static_cast<char>(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());
|
|
const 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
|