GA_AttributeSet.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        GA_AttributeSet.h ( GA Library, C++)
 *
 * COMMENTS:    A set of attributes.
 */

#pragma once

#ifndef __GA_AttributeSet__
#define __GA_AttributeSet__

#include "GA_API.h"
#include "GA_AttributeProxy.h"
#include "GA_AttributeDict.h"
#include "GA_Defaults.h"
#include "GA_ReuseStrategy.h"
#include "GA_Types.h"

#include <SYS/SYS_Inline.h>
#include <SYS/SYS_Types.h>

#include <iosfwd>
#include <stddef.h>


class GA_AIFFileH9;
class GA_ATINumeric;
class GA_ATITopology;
class GA_AttribLoadDataH9;
class GA_AttribSaveDataH9;
class GA_AttribXlateH9;
class GA_Attribute;
class GA_AttributeFilter;
class GA_AttributeType;
class GA_Defragment;
class GA_Detail;
class GA_ElementGroup;
class GA_IndexMap;
class GA_LoadMap;
class GA_MergeMap;
class GA_SaveMap;
class GA_Stat;
template <typename AIF_TYPE> class GA_AIFDefinition;

class UT_IStream;
class UT_JSONParser;
class UT_JSONWriter;
class UT_MemoryCounter;
class UT_Options;
class UT_StringHolder;
class UT_StringRef;
class UT_WorkBuffer;
template <typename T> class UT_Array;


class GA_API GA_AttributeSet
{
private:
    /// Only GA_Detail can create attribute sets because the attributes
    /// rely on the existense of the detail for index maps and otherwise it
    /// may be too easy to create a attributes without a detail.
     friend class       GA_Detail;
     /// Group table requires friendship to be able to reach the
     /// GA_AttributeDict that it is tightly coupled to.
     friend class       GA_GroupTable;
     GA_AttributeSet(GA_Detail &detail);

     GA_AttributeSet(const GA_AttributeSet &set) = delete;
     GA_AttributeSet &operator=(const GA_AttributeSet &set) = delete;

public:
    ~GA_AttributeSet();
    
    class namevalidcertificate
    {
        // Used to certify that a name has already been
        // screened for validity 
    public:
        namevalidcertificate() {}
    };

    class namevalidandfreecertificate
    {
        // Used to certify that a name has already been
        // screened for validity and collision.
    public:
        namevalidandfreecertificate() {}
    };

    // --- Attribute Management ----
    /// Create a new named attribute for the @c owner with the given @scope
    ///
    /// The @c creation_options are used to pass intrinsic properties to the
    /// attribute.  The @c creation_options are not generally stored with the
    /// attribute itself, but are used to determine the intrinsic behaviour of
    /// the attribute (i.e. specifying storage types for numeric attributes).
    ///
    /// The @c attribute_options are stored on the attribute.
    ///
    /// The @c attribtype argument is used to look up the attribute type.  Common
    /// values include @c numeric, @c "string" and @c "indexpair"
    GA_Attribute        *createAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringHolder &name,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options,
                                const UT_StringRef &attribtype,
                                const GA_ReuseStrategy &r = GA_ReuseStrategy());
    /// Create a detached attribute.
    GA_Attribute        *createDetachedAttribute(
                                GA_AttributeOwner owner,
                                const UT_StringRef &attribtype,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options) const;
    GA_Attribute        *createDetachedAttribute(
                                GA_AttributeOwner owner,
                                const GA_AttributeType &attribtype,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options) const;

    /// Convenience method to add a public attribute
    SYS_FORCE_INLINE
    GA_Attribute        *createAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options,
                                const UT_StringRef &attribtype,
                                const GA_ReuseStrategy &r = GA_ReuseStrategy())
                            {
                                return createAttribute(owner, GA_SCOPE_PUBLIC,
                                        name, creation_args,
                                        attribute_options, attribtype);
                            }

    /// Create an attribute that has the same definition as the source.
    /// @note This will fail for group attributes!
    /// @{
    GA_Attribute        *cloneAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name, namevalidcertificate,
                                const GA_Attribute &src,
                                bool clone_options,
                                GA_DataIdStrategy data_id_strategy
                                                            = GA_DATA_ID_BUMP,
                                const GA_ReuseStrategy &reuse = GA_ReuseStrategy());
    GA_Attribute        *cloneAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                const GA_Attribute &src,
                                bool clone_options,
                                GA_DataIdStrategy data_id_strategy
                                                            = GA_DATA_ID_BUMP,
                                const GA_ReuseStrategy &reuse = GA_ReuseStrategy());
    /// @}

    /// Create a temporary attribute.
    /// See @c createAttribute() for details on arguments
    GA_Attribute        *createTempAttribute(GA_AttributeOwner owner,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options,
                                const UT_StringRef &attribtype);
    GA_Attribute        *cloneTempAttribute(GA_AttributeOwner owner,
                                const GA_Attribute &src,
                                bool clone_options);
    const GA_Attribute  *findAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name,
                                const GA_AttributeOwner search_order[],
                                int search_order_size) const;
    SYS_FORCE_INLINE
    GA_Attribute        *findAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name,
                                const GA_AttributeOwner search_order[],
                                int search_order_size)
                             {
                                 return const_cast<GA_Attribute *>(
                                         static_cast<const GA_AttributeSet *>
                                         (this)->findAttribute(scope, name,
                                                    search_order,
                                                    search_order_size)); 
                             }
    SYS_FORCE_INLINE
    const GA_Attribute  *findAttribute(const UT_StringRef &name,
                                const GA_AttributeOwner search_order[],
                                int search_order_size) const
                            {
                                return findAttribute(GA_SCOPE_PUBLIC, name,
                                                     search_order,
                                                     search_order_size);
                            }
    SYS_FORCE_INLINE
    GA_Attribute        *findAttribute(const UT_StringRef &name,
                                const GA_AttributeOwner search_order[],
                                int search_order_size)
                             {
                                return findAttribute(GA_SCOPE_PUBLIC, name,
                                                     search_order,
                                                     search_order_size);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringRef &name)
                             { return findAttribute(scope, name, &owner, 1); }
    SYS_FORCE_INLINE
    GA_Attribute        *findAttribute(GA_AttributeOwner owner,
                                const UT_StringRef &name)
                             {
                                 return findAttribute(GA_SCOPE_PUBLIC, name,
                                                      &owner, 1);
                             }
    SYS_FORCE_INLINE
    const GA_Attribute  *findAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringRef &name) const
                             { return findAttribute(scope, name, &owner, 1); }
    SYS_FORCE_INLINE
    const GA_Attribute  *findAttribute(GA_AttributeOwner owner,
                                const UT_StringRef &name) const
                             {
                                 return findAttribute(GA_SCOPE_PUBLIC, name,
                                                      &owner, 1);
                             }
    void                 matchAttributes(const GA_AttributeFilter &filter,
                                const GA_AttributeOwner search_order[],
                                int search_order_size,
                                UT_Array<GA_Attribute *> &list);
    void                 matchAttributes(const GA_AttributeFilter &filter,
                                const GA_AttributeOwner search_order[],
                                int search_order_size,
                                UT_Array<const GA_Attribute *> &list) const;
    void                 matchAttributes(const GA_AttributeFilter &filter,
                                GA_AttributeOwner owner,
                                UT_Array<GA_Attribute *> &list)
                             { return matchAttributes(filter, &owner,1, list); }
    void                 matchAttributes(const GA_AttributeFilter &filter,
                                GA_AttributeOwner owner,
                                UT_Array<const GA_Attribute *> &list) const
                             { return matchAttributes(filter, &owner,1, list); }
    bool                 destroyAttribute(GA_Attribute *attribute);
    bool                 destroyAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringRef &name);
    SYS_FORCE_INLINE
    bool                 destroyAttribute(GA_AttributeOwner owner,
                                const UT_StringRef &name)
                            {
                                return destroyAttribute(owner, GA_SCOPE_PUBLIC,
                                                        name);
                            }

    bool                 destroyAttributeIncludingP(GA_Attribute *attribute);

    int                  destroyAttributes(GA_AttributeOwner owner,
                                          const GA_AttributeFilter &filter);
    bool                 renameAttribute(GA_AttributeOwner owner,
                                            GA_AttributeScope scope,
                                            const UT_StringRef &fromName,
                                            const UT_StringHolder &toName);
    /// Rename an attribute to an unused name.  Typically used to make fromName
    /// available for another attribute.
    ///
    /// Returns new name on success, NULL on failure.
    const char          *renameAttributeUnspecified(GA_AttributeOwner owner,
                                            GA_AttributeScope scope,
                                            const UT_StringRef &fromName);

    // Convenience attribute methods
    GA_Attribute        *createTupleAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringHolder &name,
                                GA_Storage storage,
                                int tuple_size,
                                const GA_Defaults &defaults,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL,
                                const GA_ReuseStrategy &r = GA_ReuseStrategy());
    SYS_FORCE_INLINE
    GA_Attribute        *createTupleAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                GA_Storage storage,
                                int tuple_size,
                                const GA_Defaults &defaults,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL,
                                const GA_ReuseStrategy &r = GA_ReuseStrategy())
    {
        return createTupleAttribute(owner, GA_SCOPE_PUBLIC, name, storage,
                                    tuple_size, defaults, creation_args,
                                    attribute_options, r);
    }
    GA_ATINumeric       *createDetachedTupleAttribute(
                                GA_AttributeOwner owner,
                                GA_Storage storage,
                                int tuple_size,
                                const GA_Defaults &defaults=GA_Defaults(0.0f),
                                const GA_AttributeOptions *attribute_options=NULL) const;
    GA_Attribute        *createArrayAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringHolder &name,
                                GA_Storage storage,
                                int tuple_size,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL,
                                const UT_StringRef &attribtype="arraydata",
                                const GA_ReuseStrategy &r = GA_ReuseStrategy());
    GA_Attribute        *createTempTupleAttribute(GA_AttributeOwner owner,
                                GA_Storage storage,
                                int tuple_size,
                                const GA_Defaults &defaults,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL);
    GA_Attribute        *createStringAttribute(GA_AttributeOwner owner,
                                GA_AttributeScope scope,
                                const UT_StringHolder &name,
                                int tuple_size=1,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL,
                                const UT_StringRef &attribtype="string",
                                const GA_ReuseStrategy &r = GA_ReuseStrategy());
    SYS_FORCE_INLINE
    GA_Attribute        *createStringAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                int tuple_size=1,
                                const UT_Options *creation_args = NULL,
                                const GA_AttributeOptions *attribute_options = NULL,
                                const UT_StringRef &attribtype="string",
                                const GA_ReuseStrategy &r = GA_ReuseStrategy())
    {
        return createStringAttribute(owner, GA_SCOPE_PUBLIC, name, tuple_size,
                                     creation_args, attribute_options, attribtype,
                                     r);
    }
    GA_Attribute        *createTempStringAttribute(GA_AttributeOwner owner,
                                int tuple_size=1);
    SYS_FORCE_INLINE
    GA_Attribute        *findPointAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name)
                             {
                                 return findAttribute(GA_ATTRIB_POINT, scope,
                                                      name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findPointAttribute(const UT_StringRef &name)
                             {
                                 return findPointAttribute(GA_SCOPE_PUBLIC,
                                                           name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findVertexAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name)
                             {
                                 return findAttribute(GA_ATTRIB_VERTEX, scope,
                                                      name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findVertexAttribute(const UT_StringRef &name)
                             {
                                 return findVertexAttribute(GA_SCOPE_PUBLIC,
                                                            name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findPrimitiveAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name)
                             {
                                 return findAttribute(GA_ATTRIB_PRIMITIVE,
                                                      scope, name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findPrimitiveAttribute(const UT_StringRef &name)
                             {
                                 return findPrimitiveAttribute(GA_SCOPE_PUBLIC,
                                                               name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findGlobalAttribute(GA_AttributeScope scope,
                                const UT_StringRef &name)
                             {
                                 return findAttribute(GA_ATTRIB_GLOBAL, scope,
                                                      name);
                             }
    SYS_FORCE_INLINE
    GA_Attribute        *findGlobalAttribute(const UT_StringRef &name)
                             {
                                 return findGlobalAttribute(GA_SCOPE_PUBLIC,
                                                            name);
                             }

    /// NOTE: These should ONLY be called by the GA_ElementGroup constructor & destructor.
    /// @{
    void registerGroup(GA_ElementGroup &group);
    void unregisterGroup(GA_ElementGroup &group);
    /// @}

    GA_ElementGroup     *findGroup(GA_AttributeOwner owner,
                                const UT_StringRef &name);
    // Convenience group methods
    GA_ElementGroup     *findPointGroup(const UT_StringRef &name)
                            { return findGroup(GA_ATTRIB_POINT, name); }
    GA_ElementGroup     *findVertexGroup(const UT_StringRef &name)
                            { return findGroup(GA_ATTRIB_VERTEX, name); }
    GA_ElementGroup     *findPrimitiveGroup(const UT_StringRef &name)
                            { return findGroup(GA_ATTRIB_PRIMITIVE, name); }

    /// Try to compress data pages
    /// Will try to compress *all* pages overlapping the specified offset 
    /// range.
    void tryCompressAllPages(GA_AttributeOwner owner,
                        GA_Offset start_offset = GA_Offset(0),
                        GA_Offset end_offset = GA_INVALID_OFFSET);

    /// Harden data pages
    /// Will harden *all* pages overlapping the specified offset range.
    /// Once this is done, multiple threads can write to an attribute in
    /// parallel at a finer granularity than pages.
    void hardenAllPages(GA_AttributeOwner owner,
                        GA_Offset start_offset = GA_Offset(0),
                        GA_Offset end_offset = GA_INVALID_OFFSET);

    /// Bumps all data IDs of attributes of the specified owner.
    void bumpAllDataIds(GA_AttributeOwner owner);

    /// Save attribute sets to a JSON stream.
    /// @section JSON-GA_AttributeSet JSON Schema: GA_AttributeSet
    ///
    /// Storage for a set of attributes.
    ///
    /// @code
    /// {
    ///     "name"          : "GA_AttributeSet",
    ///     "description"   : "Attribute storage",
    ///     "type"          : "orderedmap",
    ///     "properties": {
    ///         "vertexattributes": {
    ///             "type"      : "array",
    ///             "items"     : { "$ref" : "GA_Attribute" } ,
    ///             "description" : "Vertex attributes",
    ///             "optional"  : true,
    ///         }
    ///         "pointattributes": {
    ///             "type"      : "array",
    ///             "items"     : { "$ref" : "GA_Attribute" } ,
    ///             "description" : "Point attributes",
    ///             "optional"  : true,
    ///         }
    ///         "primitiveattributes": {
    ///             "type"      : "array",
    ///             "items"     : { "$ref" : "GA_Attribute" },
    ///             "description" : "Primitive attributes",
    ///             "optional"  : true,
    ///         }
    ///         "globalattributes": {
    ///             "type"      : "array",
    ///             "items"     : { "$ref" : "GA_Attribute" } ,
    ///             "description" : "Global attributes",
    ///             "optional"  : true,
    ///         }
    ///     }
    /// }
    /// @endcode
    /// @see @ref JSON_FileFormat, GA_AIFJSON, GA_Attribute
    bool                jsonSave(UT_JSONWriter &w, const GA_SaveMap &s) const;

    /// Load attribute sets from a JSON stream
    bool                jsonLoad(UT_JSONParser &p, GA_LoadMap &m);

    /// Stat attribute stats from a JSON stream
    static bool         jsonStat(UT_JSONParser &p, GA_Stat &sbuf);

    // --- Query methods ----
    int64               getMemoryUsage(bool inclusive) const;

    /// Count memory usage using a UT_MemoryCounter in order to count
    /// shared memory correctly.
    /// If inclusive is true, the size of this object is counted,
    /// else only memory owned by this object is counted.
    /// If this is pointed to by the calling object, inclusive should be true.
    /// If this is contained in the calling object, inclusive should be false.
    /// (Its memory was already counted in the size of the calling object.)
    void                countMemory(UT_MemoryCounter &counter, bool inclusive) const;


    bool                loadDictH9(UT_IStream &is,
                                            GA_AttributeOwner owner,
                                            int tbl_size,
                                            const GA_AIFDefinition<GA_AIFFileH9>
                                            &definition,
                                            UT_Array<GA_AttribLoadDataH9>
                                            &list,
                                            const GA_AttribXlateH9 *xlate);
    static bool         saveDictH9(std::ostream &os, const char *label,
                                        const UT_Array<GA_AttribSaveDataH9>
                                        &list);

    /// Get information about attributes
    bool                stat(GA_Stat &stat, uint level) const;

    // Private to GA_AttributeRefMap methods --------------------
    GA_Detail           *getDetail() const      { return myDetail; }

    // Private to GA_Detail methods ----------------------------------
    void                 clearAllAttributes(bool for_deletion); // Called on detail deletion
    void                 clearAllAttributes(GA_AttributeOwner owner, bool for_deletion); // Called in replaceWithPoints
    // Reserve some additional space in a symbol table for batch addition.
    void                 reserveNewSymbolTableSpace(GA_AttributeOwner owner,
                                                    GA_AttributeScope scope,
                                                    int size);
    GA_ATITopology      *createTopologyAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                GA_AttributeOwner linkowner);

    /// Raw access to the GA_AttributeDict for a particular owner
    SYS_FORCE_INLINE
    const GA_AttributeDict      &getDict(GA_AttributeOwner owner) const
    {
        UT_ASSERT_P(int(owner) >= 0 && int(owner) < int(GA_ATTRIB_OWNER_N));
        return myAttributes[owner];
    }

    /// Query whether a given string is a valid variable name.
    static bool          isValidName(const char *name,
                                     GA_AttributeScope scope=GA_SCOPE_PUBLIC);

    /// @private Function used in GA_Detail::replace to replace all attributes
    /// If 'skip' is given, we will skip processing any attribute that
    /// matches it. 'skip' will be called with attributes from the
    /// destination as well as src geometries.
    void replace(const GA_AttributeSet &src, GA_AttributeOwner owner,
                 bool replaceindexmap, GA_AttributeFilter *skip);

    /// @private Method used by merging to destroy attributes before merging
    void                 mergeDestroyDestination(GA_MergeMap &map);
    /// @private Method used by merging to add attributes during merging
    void                 mergeAddDestination(GA_MergeMap &map);

    /// @private Method used by merging detail attributes
    void                 mergeDestroyGlobalDestination(GA_MergeMap &map)
                            { mergeDestroyDestination(GA_ATTRIB_DETAIL, map); }
    /// @private Method used by merging detail attributes
    void                 mergeAddGlobalDestination(GA_MergeMap &map)
                            { mergeAddDestination(GA_ATTRIB_DETAIL, map); }

    GA_AttributeDict::iterator   begin(GA_AttributeOwner owner) const
                                 {
                                    return myAttributes[owner].begin();
                                 }
    GA_AttributeDict::iterator   begin(GA_AttributeOwner owner,
                                       GA_AttributeScope scope) const
                                 {
                                    return myAttributes[owner].begin(scope);
                                 }
    GA_AttributeDict::iterator   end(GA_AttributeOwner owner) const
                                 { return myAttributes[owner].end(); }
    GA_AttributeDict::iterator   end(GA_AttributeOwner owner,
                                     GA_AttributeScope scope) const
                                 { return myAttributes[owner].end(scope); }

    /// Called by GA_Detail::defragment when defragmenting a particular
    /// index map.  Topology attributes won't be modified; they're
    /// handled separately.
    /// NOTE: This bumps all data IDs of attributes whose owner is that of the
    ///       index map being defragmented, including topology attributes.
    void                 defragment(const GA_Defragment &defrag);

    /// By default, data IDs are not generated for new attributes to force
    /// callers to explicitly opt-in.  It is very easy for data IDs to
    /// become stale in code that is not explicitly notifying modified
    /// attributes.
    void                 enableDataIdGeneration();

    /// Query whether generation of data IDs has been enabled.
    bool                 isGeneratingDataIds() const
                            { return myGenerateDataIds; }

private:
    /// @private
    /// Used only by GA_Detail
    void setNumBuckets(GA_AttributeOwner owner, GA_AttributeScope scope, size_t nbuckets)
    {
        myAttributes[owner].setNumBuckets(scope, nbuckets);
    }

    void        adjustArraySize(GA_AttributeOwner owner, GA_Offset size);
    /// When a previously deleted element is reallocated, we need to reset the
    /// attribute data to its default values.  The constructElement() assumes
    /// that there are no current values.
    void        constructElementBlock(GA_AttributeOwner owner, GA_Offset offset, GA_Offset nelements);
    /// When an element is destroyed, the destructElement() method is called
    /// so that the attribute data can be cleaned up properly (i.e. string
    /// references or group data).
    void        destructElement(GA_AttributeOwner owner, GA_Offset offset);
    void        batchDeletion(GA_AttributeOwner owner);

    /// @private Method to grow arrays prior to merging
    void        mergeGrowData(GA_AttributeOwner owner, GA_MergeMap &map);

    /// @private Method to copy data from the source to the destination for all
    /// attribute types.
    void        mergeCopyData(const GA_MergeMap &map);

    /// @private Method to copy data from source to dest for detail attributes
    void        mergeCopyGlobalData(const GA_MergeMap &map)
                    { mergeCopyData(GA_ATTRIB_DETAIL, map); }

    /// @private Method to copy data from the source to the destination
    void        mergeCopyData(GA_AttributeOwner owner, const GA_MergeMap &map);

    void                mergeDestroyDestination(GA_AttributeOwner owner,
                                            GA_MergeMap &map);
    void                mergeAddDestination(GA_AttributeOwner owner,
                                            GA_MergeMap &map);

    const GA_IndexMap   &getIndexMap(GA_AttributeOwner type) const;
    UT_StringRef         makeUniqueName(GA_AttributeOwner owner,
                                        GA_AttributeScope scope,
                                        UT_WorkBuffer &name_buffer) const;
    UT_StringRef         makeUniqueName(GA_AttributeOwner owner,
                                        GA_AttributeScope scope,
                                        const char *prefix,
                                        UT_WorkBuffer &name_buffer) const;

    /// This method, unlike createAttribute(), merely allocates the requested
    /// attribute.  The allocated attribute is not registered in our tables
    /// nor with our detail.  Consequently name collisions are ignored, and it
    /// is up to the caller to resolve any such collisions before registering
    /// this attribute.
    GA_Attribute        *allocAttribute(GA_AttributeOwner owner,
                                const UT_StringHolder &name,
                                const UT_Options *creation_args,
                                const GA_AttributeOptions *attribute_options,
                                const UT_StringRef &attribtype) const;

    inline GA_AttributeProxy *findProxy(GA_AttributeOwner owner,
                                        GA_AttributeScope scope,
                                        const UT_StringRef &name) const
    {
        UT_ASSERT_P(owner >= GA_AttributeOwner(0) && owner < GA_ATTRIB_OWNER_N);
        return myAttributes[owner].findProxy(scope, name);
    }
    inline GA_Attribute *find(GA_AttributeOwner owner,
                              GA_AttributeScope scope,
                              const UT_StringRef &name) const
    {
        GA_AttributeProxy *p = findProxy(owner, scope, name);
        return p ? p->getAttribute() : NULL;
    }
    void add(GA_AttributeOwner owner, GA_Attribute *atr);
    void invalidateProxyAndDestroyAttribute( GA_AttributeProxy *proxy);
    bool destroy(GA_AttributeOwner owner, GA_Attribute *atr);
    bool destroy(GA_AttributeOwner owner, GA_AttributeScope scope, const UT_StringRef &name)
            { return destroy(owner, find(owner, scope, name)); }
    int destroy(GA_AttributeOwner owner, const GA_AttributeFilter &filter);
    /// Avoids the safety check on P.
    bool                 destroyIncludingP(GA_AttributeOwner owner, GA_Attribute *atr);
    void                 clear(GA_AttributeOwner owner, bool for_deletion);

    template<typename OP,typename FILL_OPT_OP>
    GA_Attribute *createAttributeImpl(
        OP &creation_op,
        FILL_OPT_OP &fill_opt_op,
        GA_AttributeOwner owner,
        GA_AttributeScope scope,
        const UT_StringHolder &name,
        const UT_Options *create_args,
        const GA_AttributeOptions *attribute_options,
        const GA_AttributeType &attribtype,
        const GA_ReuseStrategy &reuse);

    GA_Detail                   *myDetail;
    GA_AttributeDict             myAttributes[GA_ATTRIB_OWNER_N];
    UT_Array<GA_Attribute *>    *myDestructorCache[GA_ATTRIB_OWNER_N];
    bool                         myGenerateDataIds : 1;
    bool                         myPreferredPrec64 : 1;
};

#endif