engine/sqlite/src/hash.h
changeset 97 3903521a36da
parent 96 87e863f6f840
child 98 5f9e7e14eb11
--- a/engine/sqlite/src/hash.h	Wed May 26 10:44:32 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,110 +0,0 @@
-/*
-** 2001 September 22
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-*************************************************************************
-** This is the header file for the generic hash-table implemenation
-** used in SQLite.
-**
-** $Id: hash.h 1282 2008-11-13 09:31:33Z LarsPson $
-*/
-#ifndef _SQLITE_HASH_H_
-#define _SQLITE_HASH_H_
-
-/* Forward declarations of structures. */
-typedef struct Hash Hash;
-typedef struct HashElem HashElem;
-
-/* A complete hash table is an instance of the following structure.
-** The internals of this structure are intended to be opaque -- client
-** code should not attempt to access or modify the fields of this structure
-** directly.  Change this structure only by using the routines below.
-** However, many of the "procedures" and "functions" for modifying and
-** accessing this structure are really macros, so we can't really make
-** this structure opaque.
-*/
-struct Hash {
-  char keyClass;          /* SQLITE_HASH_INT, _POINTER, _STRING, _BINARY */
-  char copyKey;           /* True if copy of key made on insert */
-  int count;              /* Number of entries in this table */
-  int htsize;             /* Number of buckets in the hash table */
-  HashElem *first;        /* The first element of the array */
-  struct _ht {            /* the hash table */
-    int count;               /* Number of entries with this hash */
-    HashElem *chain;         /* Pointer to first entry with this hash */
-  } *ht;
-};
-
-/* Each element in the hash table is an instance of the following 
-** structure.  All elements are stored on a single doubly-linked list.
-**
-** Again, this structure is intended to be opaque, but it can't really
-** be opaque because it is used by macros.
-*/
-struct HashElem {
-  HashElem *next, *prev;   /* Next and previous elements in the table */
-  void *data;              /* Data associated with this element */
-  void *pKey; int nKey;    /* Key associated with this element */
-};
-
-/*
-** There are 4 different modes of operation for a hash table:
-**
-**   SQLITE_HASH_INT         nKey is used as the key and pKey is ignored.
-**
-**   SQLITE_HASH_POINTER     pKey is used as the key and nKey is ignored.
-**
-**   SQLITE_HASH_STRING      pKey points to a string that is nKey bytes long
-**                           (including the null-terminator, if any).  Case
-**                           is ignored in comparisons.
-**
-**   SQLITE_HASH_BINARY      pKey points to binary data nKey bytes long. 
-**                           memcmp() is used to compare keys.
-**
-** A copy of the key is made for SQLITE_HASH_STRING and SQLITE_HASH_BINARY
-** if the copyKey parameter to HashInit is 1.  
-*/
-/* #define SQLITE_HASH_INT       1 // NOT USED */
-/* #define SQLITE_HASH_POINTER   2 // NOT USED */
-#define SQLITE_HASH_STRING    3
-#define SQLITE_HASH_BINARY    4
-
-/*
-** Access routines.  To delete, insert a NULL pointer.
-*/
-void sqlite3HashInit(Hash*, int keytype, int copyKey);
-void *sqlite3HashInsert(Hash*, const void *pKey, int nKey, void *pData);
-void *sqlite3HashFind(const Hash*, const void *pKey, int nKey);
-HashElem *sqlite3HashFindElem(const Hash*, const void *pKey, int nKey);
-void sqlite3HashClear(Hash*);
-
-/*
-** Macros for looping over all elements of a hash table.  The idiom is
-** like this:
-**
-**   Hash h;
-**   HashElem *p;
-**   ...
-**   for(p=sqliteHashFirst(&h); p; p=sqliteHashNext(p)){
-**     SomeStructure *pData = sqliteHashData(p);
-**     // do something with pData
-**   }
-*/
-#define sqliteHashFirst(H)  ((H)->first)
-#define sqliteHashNext(E)   ((E)->next)
-#define sqliteHashData(E)   ((E)->data)
-#define sqliteHashKey(E)    ((E)->pKey)
-#define sqliteHashKeysize(E) ((E)->nKey)
-
-/*
-** Number of entries in a hash table
-*/
-#define sqliteHashCount(H)  ((H)->count)
-
-#endif /* _SQLITE_HASH_H_ */