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mdbx: rework min/max length checking for keys & values (squashed).

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This commit is contained in:
Leonid Yuriev
2020-05-15 08:59:03 +03:00
parent 9736a36efb
commit d986d09b7b
2 changed files with 369 additions and 164 deletions
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36
src/internals.h
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@@ -681,9 +681,12 @@ typedef MDBX_DP *MDBX_DPL;
* The information here is mostly static/read-only. There is
* only a single copy of this record in the environment. */
typedef struct MDBX_dbx {
MDBX_val md_name; /* name of the database */
MDBX_cmp_func *md_cmp; /* function for comparing keys */
MDBX_cmp_func *md_dcmp; /* function for comparing data items */
MDBX_val md_name; /* name of the database */
MDBX_cmp_func *md_cmp; /* function for comparing keys */
MDBX_cmp_func *md_dcmp; /* function for comparing data items */
size_t md_klen_min, md_klen_max; /* min/max key length for the database */
size_t md_vlen_min,
md_vlen_max; /* min/max value/data length for the database */
} MDBX_dbx;
/* A database transaction.
@@ -824,16 +827,23 @@ struct MDBX_cursor {
MDBX_dbx *mc_dbx;
/* The mt_dbstate for this database */
uint8_t *mc_dbstate;
unsigned mc_snum; /* number of pushed pages */
unsigned mc_top; /* index of top page, normally mc_snum-1 */
/* Cursor state flags. */
#define C_INITIALIZED 0x01 /* cursor has been initialized and is valid */
#define C_EOF 0x02 /* No more data */
#define C_SUB 0x04 /* Cursor is a sub-cursor */
#define C_DEL 0x08 /* last op was a cursor_del */
#define C_UNTRACK 0x10 /* Un-track cursor when closing */
#define C_RECLAIMING 0x20 /* GC lookup is prohibited */
#define C_GCFREEZE 0x40 /* reclaimed_pglist must not be updated */
unsigned mc_snum; /* number of pushed pages */
unsigned mc_top; /* index of top page, normally mc_snum-1 */
/* Cursor state flags. */
#define C_INITIALIZED 0x01 /* cursor has been initialized and is valid */
#define C_EOF 0x02 /* No more data */
#define C_SUB 0x04 /* Cursor is a sub-cursor */
#define C_DEL 0x08 /* last op was a cursor_del */
#define C_UNTRACK 0x10 /* Un-track cursor when closing */
#define C_RECLAIMING 0x20 /* GC lookup is prohibited */
#define C_GCFREEZE 0x40 /* reclaimed_pglist must not be updated */
/* Cursor checing flags. */
#define C_COPYING 0x100 /* skip key-value length check (copying simplify) */
#define C_UPDATING 0x200 /* update/rebalance pending */
#define C_RETIRING 0x400 /* refs to child pages may be invalid */
unsigned mc_flags; /* see mdbx_cursor */
MDBX_page *mc_pg[CURSOR_STACK]; /* stack of pushed pages */
indx_t mc_ki[CURSOR_STACK]; /* stack of page indices */