40 lines
1 KiB
C
40 lines
1 KiB
C
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/*
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* ring16.h
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*/
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/* ring buffer configuration */
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#define BUFFER_SIZE (512) /* must be 2^Nth */
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#define MIN_BUFFERS 3 /* minimum number we want */
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#define NUM_OUTPUT_BUFFER_PAGES (CHUNK_SIZE/BUFFER_SIZE)
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typedef struct aBuffer
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{
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struct aBuffer FAR *pLinkNewer; /* link to more recently used */
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struct aBuffer FAR *pLinkOlder; /* link to less recently used */
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int BufferPage; /* what page this is, -1 -> invalid */
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int BufferDirty; /* NZ -> needs to be written */
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BYTE Buffer[BUFFER_SIZE]; /* content */
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} BUFFER, FAR *PBUFFER;
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typedef struct
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{
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PBUFFER pBuffer; /* pointer to buffer, NULL if not present */
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int last_chance_ptr; /* index to last chance buffer table, or -1 */
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int fDiskValid; /* NZ -> this page has been written to disk */
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} PAGETABLEENTRY;
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typedef struct
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{
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short Len;
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long Dist;
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} MATCH;
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typedef struct
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{
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char wildName[2];
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unsigned long fileSize;
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} RINGNAME, FAR *PRINGNAME;
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