mirror of https://github.com/lianthony/NT4.0
35 lines
1.2 KiB
35 lines
1.2 KiB
// These structures define a virtual buffer. This is useful when
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// a buffer is needed whose size may exceed 64K. The virtual buffer
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// consists of a number of logically contiguous blocks.
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#ifndef VBUF_INCLUDED
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#define VBUF_INCLUDED
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// virtual buffer block
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typedef struct VBlock {
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unsigned int Size; // number of usable bytes in the block
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unsigned char *Address; // address of block
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struct VBlock *Next; // next block
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} VBlock;
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// virtual buffer
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typedef struct {
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unsigned int BlockSize; // allocated block size
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unsigned int NumBlocks; // number of blocks
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VBlock *CurBlock; // current block
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unsigned char *NextByte; // next free byte in current block
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unsigned int FreeBytes; // free bytes in current block
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VBlock *Block; // list of blocks
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} VBuf;
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extern void VBufInit(VBuf *, unsigned int);
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extern unsigned char *VBufCpy (VBuf *, unsigned char *, unsigned int);
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extern unsigned char *VBufRead (VBuf *, unsigned int, unsigned short);
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extern unsigned char *VBufSet (VBuf *, unsigned char, unsigned int);
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extern VBlock *VBufFirstBlock (VBuf *);
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extern VBlock *VBufNextBlock (VBlock *);
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#endif /* VBUF_INCLUDED */
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