Import SQLite 3.7.6.3.

third_party/sqlite/src/ext/fts3/fts3_hash.h

 /*
 ** 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.  We've modified it slightly to serve as a standalone
 ** hash table implementation for the full-text indexing module.
 **
 */
 #ifndef _FTS3_HASH_H_
 #define _FTS3_HASH_H_
 
 /* Forward declarations of structures. */
-typedef struct fts3Hash fts3Hash;
-typedef struct fts3HashElem fts3HashElem;
+typedef struct Fts3Hash Fts3Hash;
+typedef struct Fts3HashElem Fts3HashElem;
 
 /* 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 fts3Hash {
+struct Fts3Hash {
   char keyClass;          /* HASH_INT, _POINTER, _STRING, _BINARY */
   char copyKey;           /* True if copy of key made on insert */
   int count;              /* Number of entries in this table */
-  fts3HashElem *first;    /* The first element of the array */
+  Fts3HashElem *first;    /* The first element of the array */
   int htsize;             /* Number of buckets in the hash table */
   struct _fts3ht {        /* the hash table */
     int count;               /* Number of entries with this hash */
-    fts3HashElem *chain;     /* Pointer to first entry with this hash */
+    Fts3HashElem *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 fts3HashElem {
-  fts3HashElem *next, *prev; /* Next and previous elements in the table */
+struct Fts3HashElem {
+  Fts3HashElem *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 2 different modes of operation for a hash table:
 **
 **   FTS3_HASH_STRING        pKey points to a string that is nKey bytes long
 **                           (including the null-terminator, if any).  Case
 **                           is respected in comparisons.
 **
 **   FTS3_HASH_BINARY        pKey points to binary data nKey bytes long. 
 **                           memcmp() is used to compare keys.
 **
 ** A copy of the key is made if the copyKey parameter to fts3HashInit is 1.  
 */
 #define FTS3_HASH_STRING    1
 #define FTS3_HASH_BINARY    2
 
 /*
 ** Access routines.  To delete, insert a NULL pointer.
 */
-void sqlite3Fts3HashInit(fts3Hash*, int keytype, int copyKey);
-void *sqlite3Fts3HashInsert(fts3Hash*, const void *pKey, int nKey, void *pData);
-void *sqlite3Fts3HashFind(const fts3Hash*, const void *pKey, int nKey);
-void sqlite3Fts3HashClear(fts3Hash*);
+void sqlite3Fts3HashInit(Fts3Hash *pNew, char keyClass, char copyKey);
+void *sqlite3Fts3HashInsert(Fts3Hash*, const void *pKey, int nKey, void *pData);
+void *sqlite3Fts3HashFind(const Fts3Hash*, const void *pKey, int nKey);
+void sqlite3Fts3HashClear(Fts3Hash*);
+Fts3HashElem *sqlite3Fts3HashFindElem(const Fts3Hash *, const void *, int);
 
 /*
 ** Shorthand for the functions above
 */
-#define fts3HashInit   sqlite3Fts3HashInit
-#define fts3HashInsert sqlite3Fts3HashInsert
-#define fts3HashFind   sqlite3Fts3HashFind
-#define fts3HashClear  sqlite3Fts3HashClear
+#define fts3HashInit     sqlite3Fts3HashInit
+#define fts3HashInsert   sqlite3Fts3HashInsert
+#define fts3HashFind     sqlite3Fts3HashFind
+#define fts3HashClear    sqlite3Fts3HashClear
+#define fts3HashFindElem sqlite3Fts3HashFindElem
 
 /*
 ** Macros for looping over all elements of a hash table.  The idiom is
 ** like this:
 **
-**   fts3Hash h;
-**   fts3HashElem *p;
+**   Fts3Hash h;
+**   Fts3HashElem *p;
 **   ...
 **   for(p=fts3HashFirst(&h); p; p=fts3HashNext(p)){
 **     SomeStructure *pData = fts3HashData(p);
 **     // do something with pData
 **   }
 */
 #define fts3HashFirst(H)  ((H)->first)
 #define fts3HashNext(E)   ((E)->next)
 #define fts3HashData(E)   ((E)->data)
 #define fts3HashKey(E)    ((E)->pKey)
 #define fts3HashKeysize(E) ((E)->nKey)
 
 /*
 ** Number of entries in a hash table
 */
 #define fts3HashCount(H)  ((H)->count)
 
 #endif /* _FTS3_HASH_H_ */