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Add the MemPage.xParseCell method and provide various implementations

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(variations on the former btreeParseCellPtr()) depending on the page type.

FossilOrigin-Name: 41d03d883c4f7ca279eb9dd679f3ab81c8d957d9
This commit is contained in:
drh
2015-06-19 17:19:34 +00:00
parent 25ada07ab4
commit 5fa605142f
4 changed files with 141 additions and 70 deletions
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5
src/btreeInt.h
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@@ -231,6 +231,7 @@
/* Forward declarations */
typedef struct MemPage MemPage;
typedef struct BtLock BtLock;
typedef struct CellInfo CellInfo;
/*
** This is a magic string that appears at the beginning of every
@@ -295,7 +296,8 @@ struct MemPage {
u8 *aDataEnd; /* One byte past the end of usable data */
u8 *aCellIdx; /* The cell index area */
DbPage *pDbPage; /* Pager page handle */
u16 (*xCellSize)(MemPage*,u8*); /* cellSizePtr method */
u16 (*xCellSize)(MemPage*,u8*); /* cellSizePtr method */
void (*xParseCell)(MemPage*,u8*,CellInfo*); /* btreeParseCell method */
Pgno pgno; /* Page number for this page */
};
@@ -461,7 +463,6 @@ struct BtShared {
** about a cell. The parseCellPtr() function fills in this structure
** based on information extract from the raw disk page.
*/
typedef struct CellInfo CellInfo;
struct CellInfo {
i64 nKey; /* The key for INTKEY tables, or nPayload otherwise */
u8 *pPayload; /* Pointer to the start of payload */