97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
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/*
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* Copyright 2005, Haiku.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Michael Lotz <mmlr@mlotz.ch>
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*/
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/* BMessageField contains the data for indiviual named fields in BMessageBody */
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#ifndef _MESSAGE_FIELD_H_
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#define _MESSAGE_FIELD_H_
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#include <DataIO.h>
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#include <List.h>
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#include <SupportDefs.h>
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#define MSG_FLAG_VALID 0x01
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#define MSG_FLAG_MINI_DATA 0x02
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#define MSG_FLAG_FIXED_SIZE 0x04
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#define MSG_FLAG_SINGLE_ITEM 0x08
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#define MSG_FLAG_ALL 0x0F
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#define MSG_LAST_ENTRY 0x00
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namespace BPrivate {
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typedef struct field_header_s {
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uint8 flags;
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type_code type;
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int32 count;
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ssize_t dataSize;
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uint8 nameLength;
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char name[255];
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} __attribute__((__packed__)) FieldHeader;
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class BMessageField {
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public:
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BMessageField();
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BMessageField(const char *name, type_code type);
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BMessageField(uint8 flags, BDataIO *stream);
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BMessageField(const BMessageField &other);
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~BMessageField();
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BMessageField &operator=(const BMessageField &other);
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void Flatten(BDataIO *stream);
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void Unflatten(uint8 flags, BDataIO *stream);
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uint8 Flags() { return fHeader.flags; };
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void SetName(const char *name);
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const char *Name() const { return fHeader.name; };
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uint8 NameLength() const { return fHeader.nameLength; };
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type_code Type() const { return fHeader.type; };
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void *AddItem(size_t length);
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void *ReplaceItem(int32 index, size_t newLength);
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void RemoveItem(int32 index);
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int32 CountItems() const { return fHeader.count; };
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const void *BufferAt(int32 index, ssize_t *size) const;
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void MakeEmpty();
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status_t SetFixedSize(int32 itemSize, int32 count);
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bool IsFixedSize() const { return fHeader.flags & MSG_FLAG_FIXED_SIZE; };
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size_t TotalSize() const { return fHeader.dataSize; };
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void PrintToStream() const;
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// hash table support
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void SetNext(BMessageField *next) { fNext = next; };
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BMessageField *Next() const { return fNext; };
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private:
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void ResetHeader(const char *name, type_code type);
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void FlatResize(int32 offset, size_t oldLength,
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size_t newLength);
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FieldHeader fHeader;
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mutable BMallocIO fFlatBuffer;
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// fixed size items
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int32 fItemSize;
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// variable sized items
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BList *fOffsets;
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// hash table support
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BMessageField *fNext;
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};
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} // namespace BPrivate
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#endif // _MESSAGE_FIELD_H_
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