--- /dev/null
+// Copyright 2007-2010 Baptiste Lepilleur
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef CPPTL_JSON_H_INCLUDED
+# define CPPTL_JSON_H_INCLUDED
+
+# include "json_forwards.h"
+# include <string>
+# include <vector>
+
+# ifndef JSON_USE_CPPTL_SMALLMAP
+# include <map>
+# else
+# include <cpptl/smallmap.h>
+# endif
+# ifdef JSON_USE_CPPTL
+# include <cpptl/forwards.h>
+# endif
+
+/** \brief JSON (JavaScript Object Notation).
+ */
+namespace Json {
+
+ /** \brief Type of the value held by a Value object.
+ */
+ enum ValueType
+ {
+ nullValue = 0, ///< 'null' value
+ intValue, ///< signed integer value
+ uintValue, ///< unsigned integer value
+ realValue, ///< double value
+ stringValue, ///< UTF-8 string value
+ booleanValue, ///< bool value
+ arrayValue, ///< array value (ordered list)
+ objectValue ///< object value (collection of name/value pairs).
+ };
+
+ enum CommentPlacement
+ {
+ commentBefore = 0, ///< a comment placed on the line before a value
+ commentAfterOnSameLine, ///< a comment just after a value on the same line
+ commentAfter, ///< a comment on the line after a value (only make sense for root value)
+ numberOfCommentPlacement
+ };
+
+//# ifdef JSON_USE_CPPTL
+// typedef CppTL::AnyEnumerator<const char *> EnumMemberNames;
+// typedef CppTL::AnyEnumerator<const Value &> EnumValues;
+//# endif
+
+ /** \brief Lightweight wrapper to tag static string.
+ *
+ * Value constructor and objectValue member assignement takes advantage of the
+ * StaticString and avoid the cost of string duplication when storing the
+ * string or the member name.
+ *
+ * Example of usage:
+ * \code
+ * Json::Value aValue( StaticString("some text") );
+ * Json::Value object;
+ * static const StaticString code("code");
+ * object[code] = 1234;
+ * \endcode
+ */
+ class JSON_API StaticString
+ {
+ public:
+ explicit StaticString( const char *czstring )
+ : str_( czstring )
+ {
+ }
+
+ operator const char *() const
+ {
+ return str_;
+ }
+
+ const char *c_str() const
+ {
+ return str_;
+ }
+
+ private:
+ const char *str_;
+ };
+
+ /** \brief Represents a <a HREF="http://www.json.org">JSON</a> value.
+ *
+ * This class is a discriminated union wrapper that can represents a:
+ * - signed integer [range: Value::minInt - Value::maxInt]
+ * - unsigned integer (range: 0 - Value::maxUInt)
+ * - double
+ * - UTF-8 string
+ * - boolean
+ * - 'null'
+ * - an ordered list of Value
+ * - collection of name/value pairs (javascript object)
+ *
+ * The type of the held value is represented by a #ValueType and
+ * can be obtained using type().
+ *
+ * values of an #objectValue or #arrayValue can be accessed using operator[]() methods.
+ * Non const methods will automatically create the a #nullValue element
+ * if it does not exist.
+ * The sequence of an #arrayValue will be automatically resize and initialized
+ * with #nullValue. resize() can be used to enlarge or truncate an #arrayValue.
+ *
+ * The get() methods can be used to obtanis default value in the case the required element
+ * does not exist.
+ *
+ * It is possible to iterate over the list of a #objectValue values using
+ * the getMemberNames() method.
+ */
+ class JSON_API Value
+ {
+ friend class ValueIteratorBase;
+# ifdef JSON_VALUE_USE_INTERNAL_MAP
+ friend class ValueInternalLink;
+ friend class ValueInternalMap;
+# endif
+ public:
+ typedef std::vector<std::string> Members;
+ typedef ValueIterator iterator;
+ typedef ValueConstIterator const_iterator;
+ typedef Json::UInt UInt;
+ typedef Json::Int Int;
+ typedef Json::ArrayIndex ArrayIndex;
+
+ static const Value null;
+ static const Int minInt;
+ static const Int maxInt;
+ static const UInt maxUInt;
+
+ private:
+#ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+# ifndef JSON_VALUE_USE_INTERNAL_MAP
+ class CZString
+ {
+ public:
+ enum DuplicationPolicy
+ {
+ noDuplication = 0,
+ duplicate,
+ duplicateOnCopy
+ };
+ CZString( ArrayIndex index );
+ CZString( const char *cstr, DuplicationPolicy allocate );
+ CZString( const CZString &other );
+ ~CZString();
+ CZString &operator =( const CZString &other );
+ bool operator<( const CZString &other ) const;
+ bool operator==( const CZString &other ) const;
+ ArrayIndex index() const;
+ const char *c_str() const;
+ bool isStaticString() const;
+ private:
+ void swap( CZString &other );
+ const char *cstr_;
+ ArrayIndex index_;
+ };
+
+ public:
+# ifndef JSON_USE_CPPTL_SMALLMAP
+ typedef std::map<CZString, Value> ObjectValues;
+# else
+ typedef CppTL::SmallMap<CZString, Value> ObjectValues;
+# endif // ifndef JSON_USE_CPPTL_SMALLMAP
+# endif // ifndef JSON_VALUE_USE_INTERNAL_MAP
+#endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+
+ public:
+ /** \brief Create a default Value of the given type.
+
+ This is a very useful constructor.
+ To create an empty array, pass arrayValue.
+ To create an empty object, pass objectValue.
+ Another Value can then be set to this one by assignment.
+ This is useful since clear() and resize() will not alter types.
+
+ Examples:
+ \code
+ Json::Value null_value; // null
+ Json::Value arr_value(Json::arrayValue); // []
+ Json::Value obj_value(Json::objectValue); // {}
+ \endcode
+ */
+ Value( ValueType type = nullValue );
+#if !defined(JSON_NO_INT64)
+ Value( int value );
+ Value( ArrayIndex value );
+#endif // if !defined(JSON_NO_INT64)
+ Value( Int value );
+ Value( UInt value );
+ Value( double value );
+ Value( const char *value );
+ Value( const char *beginValue, const char *endValue );
+ /** \brief Constructs a value from a static string.
+
+ * Like other value string constructor but do not duplicate the string for
+ * internal storage. The given string must remain alive after the call to this
+ * constructor.
+ * Example of usage:
+ * \code
+ * Json::Value aValue( StaticString("some text") );
+ * \endcode
+ */
+ Value( const StaticString &value );
+ Value( const std::string &value );
+# ifdef JSON_USE_CPPTL
+ Value( const CppTL::ConstString &value );
+# endif
+ Value( bool value );
+ Value( const Value &other );
+ ~Value();
+
+ Value &operator=( const Value &other );
+ /// Swap values.
+ /// \note Currently, comments are intentionally not swapped, for
+ /// both logic and efficiency.
+ void swap( Value &other );
+
+ ValueType type() const;
+
+ bool operator <( const Value &other ) const;
+ bool operator <=( const Value &other ) const;
+ bool operator >=( const Value &other ) const;
+ bool operator >( const Value &other ) const;
+
+ bool operator ==( const Value &other ) const;
+ bool operator !=( const Value &other ) const;
+
+ int compare( const Value &other );
+
+ const char *asCString() const;
+ std::string asString() const;
+# ifdef JSON_USE_CPPTL
+ CppTL::ConstString asConstString() const;
+# endif
+ Int asInt() const;
+ UInt asUInt() const;
+ double asDouble() const;
+ bool asBool() const;
+
+ bool isNull() const;
+ bool isBool() const;
+ bool isInt() const;
+ bool isUInt() const;
+ bool isIntegral() const;
+ bool isDouble() const;
+ bool isNumeric() const;
+ bool isString() const;
+ bool isArray() const;
+ bool isObject() const;
+
+ bool isConvertibleTo( ValueType other ) const;
+
+ /// Number of values in array or object
+ ArrayIndex size() const;
+
+ /// \brief Return true if empty array, empty object, or null;
+ /// otherwise, false.
+ bool empty() const;
+
+ /// Return isNull()
+ bool operator!() const;
+
+ /// Remove all object members and array elements.
+ /// \pre type() is arrayValue, objectValue, or nullValue
+ /// \post type() is unchanged
+ void clear();
+
+ /// Resize the array to size elements.
+ /// New elements are initialized to null.
+ /// May only be called on nullValue or arrayValue.
+ /// \pre type() is arrayValue or nullValue
+ /// \post type() is arrayValue
+ void resize( ArrayIndex size );
+
+ /// Access an array element (zero based index ).
+ /// If the array contains less than index element, then null value are inserted
+ /// in the array so that its size is index+1.
+ /// (You may need to say 'value[0u]' to get your compiler to distinguish
+ /// this from the operator[] which takes a string.)
+ Value &operator[]( ArrayIndex index );
+ /// Access an array element (zero based index )
+ /// (You may need to say 'value[0u]' to get your compiler to distinguish
+ /// this from the operator[] which takes a string.)
+ const Value &operator[]( ArrayIndex index ) const;
+ /// If the array contains at least index+1 elements, returns the element value,
+ /// otherwise returns defaultValue.
+ Value get( ArrayIndex index,
+ const Value &defaultValue ) const;
+ /// Return true if index < size().
+ bool isValidIndex( ArrayIndex index ) const;
+ /// \brief Append value to array at the end.
+ ///
+ /// Equivalent to jsonvalue[jsonvalue.size()] = value;
+ Value &append( const Value &value );
+
+ /// Access an object value by name, create a null member if it does not exist.
+ Value &operator[]( const char *key );
+ /// Access an object value by name, returns null if there is no member with that name.
+ const Value &operator[]( const char *key ) const;
+ /// Access an object value by name, create a null member if it does not exist.
+ Value &operator[]( const std::string &key );
+ /// Access an object value by name, returns null if there is no member with that name.
+ const Value &operator[]( const std::string &key ) const;
+ /** \brief Access an object value by name, create a null member if it does not exist.
+
+ * If the object as no entry for that name, then the member name used to store
+ * the new entry is not duplicated.
+ * Example of use:
+ * \code
+ * Json::Value object;
+ * static const StaticString code("code");
+ * object[code] = 1234;
+ * \endcode
+ */
+ Value &operator[]( const StaticString &key );
+# ifdef JSON_USE_CPPTL
+ /// Access an object value by name, create a null member if it does not exist.
+ Value &operator[]( const CppTL::ConstString &key );
+ /// Access an object value by name, returns null if there is no member with that name.
+ const Value &operator[]( const CppTL::ConstString &key ) const;
+# endif
+ /// Return the member named key if it exist, defaultValue otherwise.
+ Value get( const char *key,
+ const Value &defaultValue ) const;
+ /// Return the member named key if it exist, defaultValue otherwise.
+ Value get( const std::string &key,
+ const Value &defaultValue ) const;
+# ifdef JSON_USE_CPPTL
+ /// Return the member named key if it exist, defaultValue otherwise.
+ Value get( const CppTL::ConstString &key,
+ const Value &defaultValue ) const;
+# endif
+ /// \brief Remove and return the named member.
+ ///
+ /// Do nothing if it did not exist.
+ /// \return the removed Value, or null.
+ /// \pre type() is objectValue or nullValue
+ /// \post type() is unchanged
+ Value removeMember( const char* key );
+ /// Same as removeMember(const char*)
+ Value removeMember( const std::string &key );
+
+ /// Return true if the object has a member named key.
+ bool isMember( const char *key ) const;
+ /// Return true if the object has a member named key.
+ bool isMember( const std::string &key ) const;
+# ifdef JSON_USE_CPPTL
+ /// Return true if the object has a member named key.
+ bool isMember( const CppTL::ConstString &key ) const;
+# endif
+
+ /// \brief Return a list of the member names.
+ ///
+ /// If null, return an empty list.
+ /// \pre type() is objectValue or nullValue
+ /// \post if type() was nullValue, it remains nullValue
+ Members getMemberNames() const;
+
+//# ifdef JSON_USE_CPPTL
+// EnumMemberNames enumMemberNames() const;
+// EnumValues enumValues() const;
+//# endif
+
+ /// Comments must be //... or /* ... */
+ void setComment( const char *comment,
+ CommentPlacement placement );
+ /// Comments must be //... or /* ... */
+ void setComment( const std::string &comment,
+ CommentPlacement placement );
+ bool hasComment( CommentPlacement placement ) const;
+ /// Include delimiters and embedded newlines.
+ std::string getComment( CommentPlacement placement ) const;
+
+ std::string toStyledString() const;
+
+ const_iterator begin() const;
+ const_iterator end() const;
+
+ iterator begin();
+ iterator end();
+
+ private:
+ Value &resolveReference( const char *key,
+ bool isStatic );
+
+# ifdef JSON_VALUE_USE_INTERNAL_MAP
+ inline bool isItemAvailable() const
+ {
+ return itemIsUsed_ == 0;
+ }
+
+ inline void setItemUsed( bool isUsed = true )
+ {
+ itemIsUsed_ = isUsed ? 1 : 0;
+ }
+
+ inline bool isMemberNameStatic() const
+ {
+ return memberNameIsStatic_ == 0;
+ }
+
+ inline void setMemberNameIsStatic( bool isStatic )
+ {
+ memberNameIsStatic_ = isStatic ? 1 : 0;
+ }
+# endif // # ifdef JSON_VALUE_USE_INTERNAL_MAP
+
+ private:
+ struct CommentInfo
+ {
+ CommentInfo();
+ ~CommentInfo();
+
+ void setComment( const char *text );
+
+ char *comment_;
+ };
+
+ //struct MemberNamesTransform
+ //{
+ // typedef const char *result_type;
+ // const char *operator()( const CZString &name ) const
+ // {
+ // return name.c_str();
+ // }
+ //};
+
+ union ValueHolder
+ {
+ Int int_;
+ UInt uint_;
+ double real_;
+ bool bool_;
+ char *string_;
+# ifdef JSON_VALUE_USE_INTERNAL_MAP
+ ValueInternalArray *array_;
+ ValueInternalMap *map_;
+#else
+ ObjectValues *map_;
+# endif
+ } value_;
+ ValueType type_ : 8;
+ int allocated_ : 1; // Notes: if declared as bool, bitfield is useless.
+# ifdef JSON_VALUE_USE_INTERNAL_MAP
+ unsigned int itemIsUsed_ : 1; // used by the ValueInternalMap container.
+ int memberNameIsStatic_ : 1; // used by the ValueInternalMap container.
+# endif
+ CommentInfo *comments_;
+ };
+
+
+ /** \brief Experimental and untested: represents an element of the "path" to access a node.
+ */
+ class PathArgument
+ {
+ public:
+ friend class Path;
+
+ PathArgument();
+ PathArgument( ArrayIndex index );
+ PathArgument( const char *key );
+ PathArgument( const std::string &key );
+
+ private:
+ enum Kind
+ {
+ kindNone = 0,
+ kindIndex,
+ kindKey
+ };
+ std::string key_;
+ ArrayIndex index_;
+ Kind kind_;
+ };
+
+ /** \brief Experimental and untested: represents a "path" to access a node.
+ *
+ * Syntax:
+ * - "." => root node
+ * - ".[n]" => elements at index 'n' of root node (an array value)
+ * - ".name" => member named 'name' of root node (an object value)
+ * - ".name1.name2.name3"
+ * - ".[0][1][2].name1[3]"
+ * - ".%" => member name is provided as parameter
+ * - ".[%]" => index is provied as parameter
+ */
+ class Path
+ {
+ public:
+ Path( const std::string &path,
+ const PathArgument &a1 = PathArgument(),
+ const PathArgument &a2 = PathArgument(),
+ const PathArgument &a3 = PathArgument(),
+ const PathArgument &a4 = PathArgument(),
+ const PathArgument &a5 = PathArgument() );
+
+ const Value &resolve( const Value &root ) const;
+ Value resolve( const Value &root,
+ const Value &defaultValue ) const;
+ /// Creates the "path" to access the specified node and returns a reference on the node.
+ Value &make( Value &root ) const;
+
+ private:
+ typedef std::vector<const PathArgument *> InArgs;
+ typedef std::vector<PathArgument> Args;
+
+ void makePath( const std::string &path,
+ const InArgs &in );
+ void addPathInArg( const std::string &path,
+ const InArgs &in,
+ InArgs::const_iterator &itInArg,
+ PathArgument::Kind kind );
+ void invalidPath( const std::string &path,
+ int location );
+
+ Args args_;
+ };
+
+
+
+#ifdef JSON_VALUE_USE_INTERNAL_MAP
+ /** \brief Allocator to customize Value internal map.
+ * Below is an example of a simple implementation (default implementation actually
+ * use memory pool for speed).
+ * \code
+ class DefaultValueMapAllocator : public ValueMapAllocator
+ {
+ public: // overridden from ValueMapAllocator
+ virtual ValueInternalMap *newMap()
+ {
+ return new ValueInternalMap();
+ }
+
+ virtual ValueInternalMap *newMapCopy( const ValueInternalMap &other )
+ {
+ return new ValueInternalMap( other );
+ }
+
+ virtual void destructMap( ValueInternalMap *map )
+ {
+ delete map;
+ }
+
+ virtual ValueInternalLink *allocateMapBuckets( unsigned int size )
+ {
+ return new ValueInternalLink[size];
+ }
+
+ virtual void releaseMapBuckets( ValueInternalLink *links )
+ {
+ delete [] links;
+ }
+
+ virtual ValueInternalLink *allocateMapLink()
+ {
+ return new ValueInternalLink();
+ }
+
+ virtual void releaseMapLink( ValueInternalLink *link )
+ {
+ delete link;
+ }
+ };
+ * \endcode
+ */
+ class JSON_API ValueMapAllocator
+ {
+ public:
+ virtual ~ValueMapAllocator();
+ virtual ValueInternalMap *newMap() = 0;
+ virtual ValueInternalMap *newMapCopy( const ValueInternalMap &other ) = 0;
+ virtual void destructMap( ValueInternalMap *map ) = 0;
+ virtual ValueInternalLink *allocateMapBuckets( unsigned int size ) = 0;
+ virtual void releaseMapBuckets( ValueInternalLink *links ) = 0;
+ virtual ValueInternalLink *allocateMapLink() = 0;
+ virtual void releaseMapLink( ValueInternalLink *link ) = 0;
+ };
+
+ /** \brief ValueInternalMap hash-map bucket chain link (for internal use only).
+ * \internal previous_ & next_ allows for bidirectional traversal.
+ */
+ class JSON_API ValueInternalLink
+ {
+ public:
+ enum { itemPerLink = 6 }; // sizeof(ValueInternalLink) = 128 on 32 bits architecture.
+ enum InternalFlags {
+ flagAvailable = 0,
+ flagUsed = 1
+ };
+
+ ValueInternalLink();
+
+ ~ValueInternalLink();
+
+ Value items_[itemPerLink];
+ char *keys_[itemPerLink];
+ ValueInternalLink *previous_;
+ ValueInternalLink *next_;
+ };
+
+
+ /** \brief A linked page based hash-table implementation used internally by Value.
+ * \internal ValueInternalMap is a tradional bucket based hash-table, with a linked
+ * list in each bucket to handle collision. There is an addional twist in that
+ * each node of the collision linked list is a page containing a fixed amount of
+ * value. This provides a better compromise between memory usage and speed.
+ *
+ * Each bucket is made up of a chained list of ValueInternalLink. The last
+ * link of a given bucket can be found in the 'previous_' field of the following bucket.
+ * The last link of the last bucket is stored in tailLink_ as it has no following bucket.
+ * Only the last link of a bucket may contains 'available' item. The last link always
+ * contains at least one element unless is it the bucket one very first link.
+ */
+ class JSON_API ValueInternalMap
+ {
+ friend class ValueIteratorBase;
+ friend class Value;
+ public:
+ typedef unsigned int HashKey;
+ typedef unsigned int BucketIndex;
+
+# ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+ struct IteratorState
+ {
+ IteratorState()
+ : map_(0)
+ , link_(0)
+ , itemIndex_(0)
+ , bucketIndex_(0)
+ {
+ }
+ ValueInternalMap *map_;
+ ValueInternalLink *link_;
+ BucketIndex itemIndex_;
+ BucketIndex bucketIndex_;
+ };
+# endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+
+ ValueInternalMap();
+ ValueInternalMap( const ValueInternalMap &other );
+ ValueInternalMap &operator =( const ValueInternalMap &other );
+ ~ValueInternalMap();
+
+ void swap( ValueInternalMap &other );
+
+ BucketIndex size() const;
+
+ void clear();
+
+ bool reserveDelta( BucketIndex growth );
+
+ bool reserve( BucketIndex newItemCount );
+
+ const Value *find( const char *key ) const;
+
+ Value *find( const char *key );
+
+ Value &resolveReference( const char *key,
+ bool isStatic );
+
+ void remove( const char *key );
+
+ void doActualRemove( ValueInternalLink *link,
+ BucketIndex index,
+ BucketIndex bucketIndex );
+
+ ValueInternalLink *&getLastLinkInBucket( BucketIndex bucketIndex );
+
+ Value &setNewItem( const char *key,
+ bool isStatic,
+ ValueInternalLink *link,
+ BucketIndex index );
+
+ Value &unsafeAdd( const char *key,
+ bool isStatic,
+ HashKey hashedKey );
+
+ HashKey hash( const char *key ) const;
+
+ int compare( const ValueInternalMap &other ) const;
+
+ private:
+ void makeBeginIterator( IteratorState &it ) const;
+ void makeEndIterator( IteratorState &it ) const;
+ static bool equals( const IteratorState &x, const IteratorState &other );
+ static void increment( IteratorState &iterator );
+ static void incrementBucket( IteratorState &iterator );
+ static void decrement( IteratorState &iterator );
+ static const char *key( const IteratorState &iterator );
+ static const char *key( const IteratorState &iterator, bool &isStatic );
+ static Value &value( const IteratorState &iterator );
+ static int distance( const IteratorState &x, const IteratorState &y );
+
+ private:
+ ValueInternalLink *buckets_;
+ ValueInternalLink *tailLink_;
+ BucketIndex bucketsSize_;
+ BucketIndex itemCount_;
+ };
+
+ /** \brief A simplified deque implementation used internally by Value.
+ * \internal
+ * It is based on a list of fixed "page", each page contains a fixed number of items.
+ * Instead of using a linked-list, a array of pointer is used for fast item look-up.
+ * Look-up for an element is as follow:
+ * - compute page index: pageIndex = itemIndex / itemsPerPage
+ * - look-up item in page: pages_[pageIndex][itemIndex % itemsPerPage]
+ *
+ * Insertion is amortized constant time (only the array containing the index of pointers
+ * need to be reallocated when items are appended).
+ */
+ class JSON_API ValueInternalArray
+ {
+ friend class Value;
+ friend class ValueIteratorBase;
+ public:
+ enum { itemsPerPage = 8 }; // should be a power of 2 for fast divide and modulo.
+ typedef Value::ArrayIndex ArrayIndex;
+ typedef unsigned int PageIndex;
+
+# ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+ struct IteratorState // Must be a POD
+ {
+ IteratorState()
+ : array_(0)
+ , currentPageIndex_(0)
+ , currentItemIndex_(0)
+ {
+ }
+ ValueInternalArray *array_;
+ Value **currentPageIndex_;
+ unsigned int currentItemIndex_;
+ };
+# endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+
+ ValueInternalArray();
+ ValueInternalArray( const ValueInternalArray &other );
+ ValueInternalArray &operator =( const ValueInternalArray &other );
+ ~ValueInternalArray();
+ void swap( ValueInternalArray &other );
+
+ void clear();
+ void resize( ArrayIndex newSize );
+
+ Value &resolveReference( ArrayIndex index );
+
+ Value *find( ArrayIndex index ) const;
+
+ ArrayIndex size() const;
+
+ int compare( const ValueInternalArray &other ) const;
+
+ private:
+ static bool equals( const IteratorState &x, const IteratorState &other );
+ static void increment( IteratorState &iterator );
+ static void decrement( IteratorState &iterator );
+ static Value &dereference( const IteratorState &iterator );
+ static Value &unsafeDereference( const IteratorState &iterator );
+ static int distance( const IteratorState &x, const IteratorState &y );
+ static ArrayIndex indexOf( const IteratorState &iterator );
+ void makeBeginIterator( IteratorState &it ) const;
+ void makeEndIterator( IteratorState &it ) const;
+ void makeIterator( IteratorState &it, ArrayIndex index ) const;
+
+ void makeIndexValid( ArrayIndex index );
+
+ Value **pages_;
+ ArrayIndex size_;
+ PageIndex pageCount_;
+ };
+
+ /** \brief Experimental: do not use. Allocator to customize Value internal array.
+ * Below is an example of a simple implementation (actual implementation use
+ * memory pool).
+ \code
+class DefaultValueArrayAllocator : public ValueArrayAllocator
+{
+public: // overridden from ValueArrayAllocator
+ virtual ~DefaultValueArrayAllocator()
+ {
+ }
+
+ virtual ValueInternalArray *newArray()
+ {
+ return new ValueInternalArray();
+ }
+
+ virtual ValueInternalArray *newArrayCopy( const ValueInternalArray &other )
+ {
+ return new ValueInternalArray( other );
+ }
+
+ virtual void destruct( ValueInternalArray *array )
+ {
+ delete array;
+ }
+
+ virtual void reallocateArrayPageIndex( Value **&indexes,
+ ValueInternalArray::PageIndex &indexCount,
+ ValueInternalArray::PageIndex minNewIndexCount )
+ {
+ ValueInternalArray::PageIndex newIndexCount = (indexCount*3)/2 + 1;
+ if ( minNewIndexCount > newIndexCount )
+ newIndexCount = minNewIndexCount;
+ void *newIndexes = realloc( indexes, sizeof(Value*) * newIndexCount );
+ if ( !newIndexes )
+ throw std::bad_alloc();
+ indexCount = newIndexCount;
+ indexes = static_cast<Value **>( newIndexes );
+ }
+ virtual void releaseArrayPageIndex( Value **indexes,
+ ValueInternalArray::PageIndex indexCount )
+ {
+ if ( indexes )
+ free( indexes );
+ }
+
+ virtual Value *allocateArrayPage()
+ {
+ return static_cast<Value *>( malloc( sizeof(Value) * ValueInternalArray::itemsPerPage ) );
+ }
+
+ virtual void releaseArrayPage( Value *value )
+ {
+ if ( value )
+ free( value );
+ }
+};
+ \endcode
+ */
+ class JSON_API ValueArrayAllocator
+ {
+ public:
+ virtual ~ValueArrayAllocator();
+ virtual ValueInternalArray *newArray() = 0;
+ virtual ValueInternalArray *newArrayCopy( const ValueInternalArray &other ) = 0;
+ virtual void destructArray( ValueInternalArray *array ) = 0;
+ /** \brief Reallocate array page index.
+ * Reallocates an array of pointer on each page.
+ * \param indexes [input] pointer on the current index. May be \c NULL.
+ * [output] pointer on the new index of at least
+ * \a minNewIndexCount pages.
+ * \param indexCount [input] current number of pages in the index.
+ * [output] number of page the reallocated index can handle.
+ * \b MUST be >= \a minNewIndexCount.
+ * \param minNewIndexCount Minimum number of page the new index must be able to
+ * handle.
+ */
+ virtual void reallocateArrayPageIndex( Value **&indexes,
+ ValueInternalArray::PageIndex &indexCount,
+ ValueInternalArray::PageIndex minNewIndexCount ) = 0;
+ virtual void releaseArrayPageIndex( Value **indexes,
+ ValueInternalArray::PageIndex indexCount ) = 0;
+ virtual Value *allocateArrayPage() = 0;
+ virtual void releaseArrayPage( Value *value ) = 0;
+ };
+#endif // #ifdef JSON_VALUE_USE_INTERNAL_MAP
+
+
+ /** \brief base class for Value iterators.
+ *
+ */
+ class ValueIteratorBase
+ {
+ public:
+ typedef unsigned int size_t;
+ typedef int difference_type;
+ typedef ValueIteratorBase SelfType;
+
+ ValueIteratorBase();
+#ifndef JSON_VALUE_USE_INTERNAL_MAP
+ explicit ValueIteratorBase( const Value::ObjectValues::iterator ¤t );
+#else
+ ValueIteratorBase( const ValueInternalArray::IteratorState &state );
+ ValueIteratorBase( const ValueInternalMap::IteratorState &state );
+#endif
+
+ bool operator ==( const SelfType &other ) const
+ {
+ return isEqual( other );
+ }
+
+ bool operator !=( const SelfType &other ) const
+ {
+ return !isEqual( other );
+ }
+
+ difference_type operator -( const SelfType &other ) const
+ {
+ return computeDistance( other );
+ }
+
+ /// Return either the index or the member name of the referenced value as a Value.
+ Value key() const;
+
+ /// Return the index of the referenced Value. -1 if it is not an arrayValue.
+ UInt index() const;
+
+ /// Return the member name of the referenced Value. "" if it is not an objectValue.
+ const char *memberName() const;
+
+ protected:
+ Value &deref() const;
+
+ void increment();
+
+ void decrement();
+
+ difference_type computeDistance( const SelfType &other ) const;
+
+ bool isEqual( const SelfType &other ) const;
+
+ void copy( const SelfType &other );
+
+ private:
+#ifndef JSON_VALUE_USE_INTERNAL_MAP
+ Value::ObjectValues::iterator current_;
+ // Indicates that iterator is for a null value.
+ bool isNull_;
+#else
+ union
+ {
+ ValueInternalArray::IteratorState array_;
+ ValueInternalMap::IteratorState map_;
+ } iterator_;
+ bool isArray_;
+#endif
+ };
+
+ /** \brief const iterator for object and array value.
+ *
+ */
+ class ValueConstIterator : public ValueIteratorBase
+ {
+ friend class Value;
+ public:
+ typedef unsigned int size_t;
+ typedef int difference_type;
+ typedef const Value &reference;
+ typedef const Value *pointer;
+ typedef ValueConstIterator SelfType;
+
+ ValueConstIterator();
+ private:
+ /*! \internal Use by Value to create an iterator.
+ */
+#ifndef JSON_VALUE_USE_INTERNAL_MAP
+ explicit ValueConstIterator( const Value::ObjectValues::iterator ¤t );
+#else
+ ValueConstIterator( const ValueInternalArray::IteratorState &state );
+ ValueConstIterator( const ValueInternalMap::IteratorState &state );
+#endif
+ public:
+ SelfType &operator =( const ValueIteratorBase &other );
+
+ SelfType operator++( int )
+ {
+ SelfType temp( *this );
+ ++*this;
+ return temp;
+ }
+
+ SelfType operator--( int )
+ {
+ SelfType temp( *this );
+ --*this;
+ return temp;
+ }
+
+ SelfType &operator--()
+ {
+ decrement();
+ return *this;
+ }
+
+ SelfType &operator++()
+ {
+ increment();
+ return *this;
+ }
+
+ reference operator *() const
+ {
+ return deref();
+ }
+ };
+
+
+ /** \brief Iterator for object and array value.
+ */
+ class ValueIterator : public ValueIteratorBase
+ {
+ friend class Value;
+ public:
+ typedef unsigned int size_t;
+ typedef int difference_type;
+ typedef Value &reference;
+ typedef Value *pointer;
+ typedef ValueIterator SelfType;
+
+ ValueIterator();
+ ValueIterator( const ValueConstIterator &other );
+ ValueIterator( const ValueIterator &other );
+ private:
+ /*! \internal Use by Value to create an iterator.
+ */
+#ifndef JSON_VALUE_USE_INTERNAL_MAP
+ explicit ValueIterator( const Value::ObjectValues::iterator ¤t );
+#else
+ ValueIterator( const ValueInternalArray::IteratorState &state );
+ ValueIterator( const ValueInternalMap::IteratorState &state );
+#endif
+ public:
+
+ SelfType &operator =( const SelfType &other );
+
+ SelfType operator++( int )
+ {
+ SelfType temp( *this );
+ ++*this;
+ return temp;
+ }
+
+ SelfType operator--( int )
+ {
+ SelfType temp( *this );
+ --*this;
+ return temp;
+ }
+
+ SelfType &operator--()
+ {
+ decrement();
+ return *this;
+ }
+
+ SelfType &operator++()
+ {
+ increment();
+ return *this;
+ }
+
+ reference operator *() const
+ {
+ return deref();
+ }
+ };
+
+
+} // namespace Json
+
+
+#endif // CPPTL_JSON_H_INCLUDED
projects / bamtools.git / blobdiff