FCL/sf/mw/web: comparison webengine/webkitutils/SqliteSymbian/sqlite3.h

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+/*
+** 2001 September 15
+**
+** 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 header file defines the interface that the SQLite library
+** presents to client programs.
+**
+** @(#) $Id: sqlite.h.in,v 1.189 2006/08/24 14:59:46 drh Exp $
+*/
+#ifndef _SQLITE3_H_
+#define _SQLITE3_H_
+#include <stdarg.h>     /* Needed for the definition of va_list */
+/*
+** Make sure we can call this stuff from C++.
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+** The version of the SQLite library.
+*/
+#ifdef SQLITE_VERSION
+# undef SQLITE_VERSION
+#endif
+#define SQLITE_VERSION         "3.3.7"
+/*
+** The format of the version string is "X.Y.Z<trailing string>", where
+** X is the major version number, Y is the minor version number and Z
+** is the release number. The trailing string is often "alpha" or "beta".
+** For example "3.1.1beta".
+**
+** The SQLITE_VERSION_NUMBER is an integer with the value
+** (X*100000 + Y*1000 + Z). For example, for version "3.1.1beta",
+** SQLITE_VERSION_NUMBER is set to 3001001. To detect if they are using
+** version 3.1.1 or greater at compile time, programs may use the test
+** (SQLITE_VERSION_NUMBER>=3001001).
+*/
+#ifdef SQLITE_VERSION_NUMBER
+# undef SQLITE_VERSION_NUMBER
+#endif
+#define SQLITE_VERSION_NUMBER 3003007
+/*
+** The version string is also compiled into the library so that a program
+** can check to make sure that the lib*.a file and the *.h file are from
+** the same version.  The sqlite3_libversion() function returns a pointer
+** to the sqlite3_version variable - useful in DLLs which cannot access
+** global variables.
+*/
+extern const char sqlite3_version[];
+const char *sqlite3_libversion(void);
+/*
+** Return the value of the SQLITE_VERSION_NUMBER macro when the
+** library was compiled.
+*/
+int sqlite3_libversion_number(void);
+/*
+** Each open sqlite database is represented by an instance of the
+** following opaque structure.
+*/
+typedef struct sqlite3 sqlite3;
+/*
+** Some compilers do not support the "long long" datatype.  So we have
+** to do a typedef that for 64-bit integers that depends on what compiler
+** is being used.
+*/
+#ifdef SQLITE_INT64_TYPE
+typedef SQLITE_INT64_TYPE sqlite_int64;
+typedef unsigned SQLITE_INT64_TYPE sqlite_uint64;
+#elif defined(_MSC_VER) || defined(__BORLANDC__)
+typedef __int64 sqlite_int64;
+typedef unsigned __int64 sqlite_uint64;
+#else
+typedef long long int sqlite_int64;
+typedef unsigned long long int sqlite_uint64;
+#endif
+/*
+** If compiling for a processor that lacks floating point support,
+** substitute integer for floating-point
+*/
+#ifdef SQLITE_OMIT_FLOATING_POINT
+# define double sqlite_int64
+#endif
+/*
+** A function to close the database.
+**
+** Call this function with a pointer to a structure that was previously
+** returned from sqlite3_open() and the corresponding database will by closed.
+**
+** All SQL statements prepared using sqlite3_prepare() or
+** sqlite3_prepare16() must be deallocated using sqlite3_finalize() before
+** this routine is called. Otherwise, SQLITE_BUSY is returned and the
+** database connection remains open.
+*/
+IMPORT_C int sqlite3_close(sqlite3 *);
+/*
+** The type for a callback function.
+*/
+typedef int (*sqlite3_callback)(void*,int,char**, char**);
+/*
+** A function to executes one or more statements of SQL.
+**
+** If one or more of the SQL statements are queries, then
+** the callback function specified by the 3rd parameter is
+** invoked once for each row of the query result.  This callback
+** should normally return 0.  If the callback returns a non-zero
+** value then the query is aborted, all subsequent SQL statements
+** are skipped and the sqlite3_exec() function returns the SQLITE_ABORT.
+**
+** The 4th parameter is an arbitrary pointer that is passed
+** to the callback function as its first parameter.
+**
+** The 2nd parameter to the callback function is the number of
+** columns in the query result.  The 3rd parameter to the callback
+** is an array of strings holding the values for each column.
+** The 4th parameter to the callback is an array of strings holding
+** the names of each column.
+**
+** The callback function may be NULL, even for queries.  A NULL
+** callback is not an error.  It just means that no callback
+** will be invoked.
+**
+** If an error occurs while parsing or evaluating the SQL (but
+** not while executing the callback) then an appropriate error
+** message is written into memory obtained from malloc() and
+** *errmsg is made to point to that message.  The calling function
+** is responsible for freeing the memory that holds the error
+** message.   Use sqlite3_free() for this.  If errmsg==NULL,
+** then no error message is ever written.
+**
+** The return value is is SQLITE_OK if there are no errors and
+** some other return code if there is an error.  The particular
+** return value depends on the type of error.
+**
+** If the query could not be executed because a database file is
+** locked or busy, then this function returns SQLITE_BUSY.  (This
+** behavior can be modified somewhat using the sqlite3_busy_handler()
+** and sqlite3_busy_timeout() functions below.)
+*/
+int sqlite3_exec(
+sqlite3*,                     /* An open database */
+const char *sql,              /* SQL to be executed */
+sqlite3_callback,             /* Callback function */
+void *,                       /* 1st argument to callback function */
+char **errmsg                 /* Error msg written here */
+);
+/*
+** Return values for sqlite3_exec() and sqlite3_step()
+*/
+#define SQLITE_OK           0   /* Successful result */
+/* beginning-of-error-codes */
+#define SQLITE_ERROR        1   /* SQL error or missing database */
+#define SQLITE_INTERNAL     2   /* NOT USED. Internal logic error in SQLite */
+#define SQLITE_PERM         3   /* Access permission denied */
+#define SQLITE_ABORT        4   /* Callback routine requested an abort */
+#define SQLITE_BUSY         5   /* The database file is locked */
+#define SQLITE_LOCKED       6   /* A table in the database is locked */
+#define SQLITE_NOMEM        7   /* A malloc() failed */
+#define SQLITE_READONLY     8   /* Attempt to write a readonly database */
+#define SQLITE_INTERRUPT    9   /* Operation terminated by sqlite3_interrupt()*/
+#define SQLITE_IOERR       10   /* Some kind of disk I/O error occurred */
+#define SQLITE_CORRUPT     11   /* The database disk image is malformed */
+#define SQLITE_NOTFOUND    12   /* NOT USED. Table or record not found */
+#define SQLITE_FULL        13   /* Insertion failed because database is full */
+#define SQLITE_CANTOPEN    14   /* Unable to open the database file */
+#define SQLITE_PROTOCOL    15   /* Database lock protocol error */
+#define SQLITE_EMPTY       16   /* Database is empty */
+#define SQLITE_SCHEMA      17   /* The database schema changed */
+#define SQLITE_TOOBIG      18   /* NOT USED. Too much data for one row */
+#define SQLITE_CONSTRAINT  19   /* Abort due to contraint violation */
+#define SQLITE_MISMATCH    20   /* Data type mismatch */
+#define SQLITE_MISUSE      21   /* Library used incorrectly */
+#define SQLITE_NOLFS       22   /* Uses OS features not supported on host */
+#define SQLITE_AUTH        23   /* Authorization denied */
+#define SQLITE_FORMAT      24   /* Auxiliary database format error */
+#define SQLITE_RANGE       25   /* 2nd parameter to sqlite3_bind out of range */
+#define SQLITE_NOTADB      26   /* File opened that is not a database file */
+#define SQLITE_ROW         100  /* sqlite3_step() has another row ready */
+#define SQLITE_DONE        101  /* sqlite3_step() has finished executing */
+/* end-of-error-codes */
+/*
+** Each entry in an SQLite table has a unique integer key.  (The key is
+** the value of the INTEGER PRIMARY KEY column if there is such a column,
+** otherwise the key is generated at random.  The unique key is always
+** available as the ROWID, OID, or _ROWID_ column.)  The following routine
+** returns the integer key of the most recent insert in the database.
+**
+** This function is similar to the mysql_insert_id() function from MySQL.
+*/
+IMPORT_C sqlite_int64 sqlite3_last_insert_rowid(sqlite3*);
+/*
+** This function returns the number of database rows that were changed
+** (or inserted or deleted) by the most recent called sqlite3_exec().
+**
+** All changes are counted, even if they were later undone by a
+** ROLLBACK or ABORT.  Except, changes associated with creating and
+** dropping tables are not counted.
+**
+** If a callback invokes sqlite3_exec() recursively, then the changes
+** in the inner, recursive call are counted together with the changes
+** in the outer call.
+**
+** SQLite implements the command "DELETE FROM table" without a WHERE clause
+** by dropping and recreating the table.  (This is much faster than going
+** through and deleting individual elements form the table.)  Because of
+** this optimization, the change count for "DELETE FROM table" will be
+** zero regardless of the number of elements that were originally in the
+** table. To get an accurate count of the number of rows deleted, use
+** "DELETE FROM table WHERE 1" instead.
+*/
+IMPORT_C int sqlite3_changes(sqlite3*);
+/*
+** This function returns the number of database rows that have been
+** modified by INSERT, UPDATE or DELETE statements since the database handle
+** was opened. This includes UPDATE, INSERT and DELETE statements executed
+** as part of trigger programs. All changes are counted as soon as the
+** statement that makes them is completed (when the statement handle is
+** passed to sqlite3_reset() or sqlite_finalise()).
+**
+** SQLite implements the command "DELETE FROM table" without a WHERE clause
+** by dropping and recreating the table.  (This is much faster than going
+** through and deleting individual elements form the table.)  Because of
+** this optimization, the change count for "DELETE FROM table" will be
+** zero regardless of the number of elements that were originally in the
+** table. To get an accurate count of the number of rows deleted, use
+** "DELETE FROM table WHERE 1" instead.
+*/
+int sqlite3_total_changes(sqlite3*);
+/* This function causes any pending database operation to abort and
+** return at its earliest opportunity.  This routine is typically
+** called in response to a user action such as pressing "Cancel"
+** or Ctrl-C where the user wants a long query operation to halt
+** immediately.
+*/
+void sqlite3_interrupt(sqlite3*);
+/* These functions return true if the given input string comprises
+** one or more complete SQL statements. For the sqlite3_complete() call,
+** the parameter must be a nul-terminated UTF-8 string. For
+** sqlite3_complete16(), a nul-terminated machine byte order UTF-16 string
+** is required.
+**
+** The algorithm is simple.  If the last token other than spaces
+** and comments is a semicolon, then return true.  otherwise return
+** false.
+*/
+int sqlite3_complete(const char *sql);
+int sqlite3_complete16(const void *sql);
+/*
+** This routine identifies a callback function that is invoked
+** whenever an attempt is made to open a database table that is
+** currently locked by another process or thread.  If the busy callback
+** is NULL, then sqlite3_exec() returns SQLITE_BUSY immediately if
+** it finds a locked table.  If the busy callback is not NULL, then
+** sqlite3_exec() invokes the callback with three arguments.  The
+** second argument is the name of the locked table and the third
+** argument is the number of times the table has been busy.  If the
+** busy callback returns 0, then sqlite3_exec() immediately returns
+** SQLITE_BUSY.  If the callback returns non-zero, then sqlite3_exec()
+** tries to open the table again and the cycle repeats.
+**
+** The default busy callback is NULL.
+**
+** Sqlite is re-entrant, so the busy handler may start a new query.
+** (It is not clear why anyone would every want to do this, but it
+** is allowed, in theory.)  But the busy handler may not close the
+** database.  Closing the database from a busy handler will delete
+** data structures out from under the executing query and will
+** probably result in a coredump.
+*/
+IMPORT_C int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*);
+/*
+** This routine sets a busy handler that sleeps for a while when a
+** table is locked.  The handler will sleep multiple times until
+** at least "ms" milleseconds of sleeping have been done.  After
+** "ms" milleseconds of sleeping, the handler returns 0 which
+** causes sqlite3_exec() to return SQLITE_BUSY.
+**
+** Calling this routine with an argument less than or equal to zero
+** turns off all busy handlers.
+*/
+IMPORT_C int sqlite3_busy_timeout(sqlite3*, int ms);
+/*
+** This next routine is really just a wrapper around sqlite3_exec().
+** Instead of invoking a user-supplied callback for each row of the
+** result, this routine remembers each row of the result in memory
+** obtained from malloc(), then returns all of the result after the
+** query has finished.
+**
+** As an example, suppose the query result where this table:
+**
+**        Name        | Age
+**        -----------------------
+**        Alice       | 43
+**        Bob         | 28
+**        Cindy       | 21
+**
+** If the 3rd argument were &azResult then after the function returns
+** azResult will contain the following data:
+**
+**        azResult[0] = "Name";
+**        azResult[1] = "Age";
+**        azResult[2] = "Alice";
+**        azResult[3] = "43";
+**        azResult[4] = "Bob";
+**        azResult[5] = "28";
+**        azResult[6] = "Cindy";
+**        azResult[7] = "21";
+**
+** Notice that there is an extra row of data containing the column
+** headers.  But the *nrow return value is still 3.  *ncolumn is
+** set to 2.  In general, the number of values inserted into azResult
+** will be ((*nrow) + 1)*(*ncolumn).
+**
+** After the calling function has finished using the result, it should
+** pass the result data pointer to sqlite3_free_table() in order to
+** release the memory that was malloc-ed.  Because of the way the
+** malloc() happens, the calling function must not try to call
+** free() directly.  Only sqlite3_free_table() is able to release
+** the memory properly and safely.
+**
+** The return value of this routine is the same as from sqlite3_exec().
+*/
+int sqlite3_get_table(
+sqlite3*,               /* An open database */
+const char *sql,       /* SQL to be executed */
+char ***resultp,       /* Result written to a char *[]  that this points to */
+int *nrow,             /* Number of result rows written here */
+int *ncolumn,          /* Number of result columns written here */
+char **errmsg          /* Error msg written here */
+);
+/*
+** Call this routine to free the memory that sqlite3_get_table() allocated.
+*/
+void sqlite3_free_table(char **result);
+/*
+** The following routines are variants of the "sprintf()" from the
+** standard C library.  The resulting string is written into memory
+** obtained from malloc() so that there is never a possiblity of buffer
+** overflow.  These routines also implement some additional formatting
+** options that are useful for constructing SQL statements.
+**
+** The strings returned by these routines should be freed by calling
+** sqlite3_free().
+**
+** All of the usual printf formatting options apply.  In addition, there
+** is a "%q" option.  %q works like %s in that it substitutes a null-terminated
+** string from the argument list.  But %q also doubles every '\'' character.
+** %q is designed for use inside a string literal.  By doubling each '\''
+** character it escapes that character and allows it to be inserted into
+** the string.
+**
+** For example, so some string variable contains text as follows:
+**
+**      char *zText = "It's a happy day!";
+**
+** We can use this text in an SQL statement as follows:
+**
+**      char *z = sqlite3_mprintf("INSERT INTO TABLES('%q')", zText);
+**      sqlite3_exec(db, z, callback1, 0, 0);
+**      sqlite3_free(z);
+**
+** Because the %q format string is used, the '\'' character in zText
+** is escaped and the SQL generated is as follows:
+**
+**      INSERT INTO table1 VALUES('It''s a happy day!')
+**
+** This is correct.  Had we used %s instead of %q, the generated SQL
+** would have looked like this:
+**
+**      INSERT INTO table1 VALUES('It's a happy day!');
+**
+** This second example is an SQL syntax error.  As a general rule you
+** should always use %q instead of %s when inserting text into a string
+** literal.
+*/
+char *sqlite3_mprintf(const char*,...);
+char *sqlite3_vmprintf(const char*, va_list);
+char *sqlite3_snprintf(int,char*,const char*, ...);
+/*
+** SQLite uses its own memory allocator.  On many installations, this
+** memory allocator is identical to the standard malloc()/realloc()/free()
+** and can be used interchangable.  On others, the implementations are
+** different.  For maximum portability, it is best not to mix calls
+** to the standard malloc/realloc/free with the sqlite versions.
+*/
+void *sqlite3_malloc(int);
+void *sqlite3_realloc(void*, int);
+void sqlite3_free(void*);
+#ifndef SQLITE_OMIT_AUTHORIZATION
+/*
+** This routine registers a callback with the SQLite library.  The
+** callback is invoked (at compile-time, not at run-time) for each
+** attempt to access a column of a table in the database.  The callback
+** returns SQLITE_OK if access is allowed, SQLITE_DENY if the entire
+** SQL statement should be aborted with an error and SQLITE_IGNORE
+** if the column should be treated as a NULL value.
+*/
+int sqlite3_set_authorizer(
+sqlite3*,
+int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
+void *pUserData
+);
+#endif
+/*
+** The second parameter to the access authorization function above will
+** be one of the values below.  These values signify what kind of operation
+** is to be authorized.  The 3rd and 4th parameters to the authorization
+** function will be parameters or NULL depending on which of the following
+** codes is used as the second parameter.  The 5th parameter is the name
+** of the database ("main", "temp", etc.) if applicable.  The 6th parameter
+** is the name of the inner-most trigger or view that is responsible for
+** the access attempt or NULL if this access attempt is directly from
+** input SQL code.
+**
+**                                          Arg-3           Arg-4
+*/
+#define SQLITE_COPY                  0   /* Table Name      File Name       */
+#define SQLITE_CREATE_INDEX          1   /* Index Name      Table Name      */
+#define SQLITE_CREATE_TABLE          2   /* Table Name      NULL            */
+#define SQLITE_CREATE_TEMP_INDEX     3   /* Index Name      Table Name      */
+#define SQLITE_CREATE_TEMP_TABLE     4   /* Table Name      NULL            */
+#define SQLITE_CREATE_TEMP_TRIGGER   5   /* Trigger Name    Table Name      */
+#define SQLITE_CREATE_TEMP_VIEW      6   /* View Name       NULL            */
+#define SQLITE_CREATE_TRIGGER        7   /* Trigger Name    Table Name      */
+#define SQLITE_CREATE_VIEW           8   /* View Name       NULL            */
+#define SQLITE_DELETE                9   /* Table Name      NULL            */
+#define SQLITE_DROP_INDEX           10   /* Index Name      Table Name      */
+#define SQLITE_DROP_TABLE           11   /* Table Name      NULL            */
+#define SQLITE_DROP_TEMP_INDEX      12   /* Index Name      Table Name      */
+#define SQLITE_DROP_TEMP_TABLE      13   /* Table Name      NULL            */
+#define SQLITE_DROP_TEMP_TRIGGER    14   /* Trigger Name    Table Name      */
+#define SQLITE_DROP_TEMP_VIEW       15   /* View Name       NULL            */
+#define SQLITE_DROP_TRIGGER         16   /* Trigger Name    Table Name      */
+#define SQLITE_DROP_VIEW            17   /* View Name       NULL            */
+#define SQLITE_INSERT               18   /* Table Name      NULL            */
+#define SQLITE_PRAGMA               19   /* Pragma Name     1st arg or NULL */
+#define SQLITE_READ                 20   /* Table Name      Column Name     */
+#define SQLITE_SELECT               21   /* NULL            NULL            */
+#define SQLITE_TRANSACTION          22   /* NULL            NULL            */
+#define SQLITE_UPDATE               23   /* Table Name      Column Name     */
+#define SQLITE_ATTACH               24   /* Filename        NULL            */
+#define SQLITE_DETACH               25   /* Database Name   NULL            */
+#define SQLITE_ALTER_TABLE          26   /* Database Name   Table Name      */
+#define SQLITE_REINDEX              27   /* Index Name      NULL            */
+#define SQLITE_ANALYZE              28   /* Table Name      NULL            */
+#define SQLITE_CREATE_VTABLE        29   /* Table Name      Module Name     */
+#define SQLITE_DROP_VTABLE          30   /* Table Name      Module Name     */
+#define SQLITE_FUNCTION             31   /* Function Name   NULL            */
+/*
+** The return value of the authorization function should be one of the
+** following constants:
+*/
+/* #define SQLITE_OK  0   // Allow access (This is actually defined above) */
+#define SQLITE_DENY   1   /* Abort the SQL statement with an error */
+#define SQLITE_IGNORE 2   /* Don't allow access, but don't generate an error */
+/*
+** Register a function for tracing SQL command evaluation.  The function
+** registered by sqlite3_trace() is invoked at the first sqlite3_step()
+** for the evaluation of an SQL statement.  The function registered by
+** sqlite3_profile() runs at the end of each SQL statement and includes
+** information on how long that statement ran.
+**
+** The sqlite3_profile() API is currently considered experimental and
+** is subject to change.
+*/
+void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
+void *sqlite3_profile(sqlite3*,
+void(*xProfile)(void*,const char*,sqlite_uint64), void*);
+/*
+** This routine configures a callback function - the progress callback - that
+** is invoked periodically during long running calls to sqlite3_exec(),
+** sqlite3_step() and sqlite3_get_table(). An example use for this API is to
+** keep a GUI updated during a large query.
+**
+** The progress callback is invoked once for every N virtual machine opcodes,
+** where N is the second argument to this function. The progress callback
+** itself is identified by the third argument to this function. The fourth
+** argument to this function is a void pointer passed to the progress callback
+** function each time it is invoked.
+**
+** If a call to sqlite3_exec(), sqlite3_step() or sqlite3_get_table() results
+** in less than N opcodes being executed, then the progress callback is not
+** invoked.
+**
+** To remove the progress callback altogether, pass NULL as the third
+** argument to this function.
+**
+** If the progress callback returns a result other than 0, then the current
+** query is immediately terminated and any database changes rolled back. If the
+** query was part of a larger transaction, then the transaction is not rolled
+** back and remains active. The sqlite3_exec() call returns SQLITE_ABORT.
+**
+******* THIS IS AN EXPERIMENTAL API AND IS SUBJECT TO CHANGE ******
+*/
+void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);
+/*
+** Register a callback function to be invoked whenever a new transaction
+** is committed.  The pArg argument is passed through to the callback.
+** callback.  If the callback function returns non-zero, then the commit
+** is converted into a rollback.
+**
+** If another function was previously registered, its pArg value is returned.
+** Otherwise NULL is returned.
+**
+** Registering a NULL function disables the callback.
+**
+******* THIS IS AN EXPERIMENTAL API AND IS SUBJECT TO CHANGE ******
+*/
+void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
+/*
+** Open the sqlite database file "filename".  The "filename" is UTF-8
+** encoded for sqlite3_open() and UTF-16 encoded in the native byte order
+** for sqlite3_open16().  An sqlite3* handle is returned in *ppDb, even
+** if an error occurs. If the database is opened (or created) successfully,
+** then SQLITE_OK is returned. Otherwise an error code is returned. The
+** sqlite3_errmsg() or sqlite3_errmsg16()  routines can be used to obtain
+** an English language description of the error.
+**
+** If the database file does not exist, then a new database is created.
+** The encoding for the database is UTF-8 if sqlite3_open() is called and
+** UTF-16 if sqlite3_open16 is used.
+**
+** Whether or not an error occurs when it is opened, resources associated
+** with the sqlite3* handle should be released by passing it to
+** sqlite3_close() when it is no longer required.
+*/
+int sqlite3_open(
+const char *filename,   /* Database filename (UTF-8) */
+sqlite3 **ppDb          /* OUT: SQLite db handle */
+);
+IMPORT_C int sqlite3_open16(
+const void *filename,   /* Database filename (UTF-16) */
+sqlite3 **ppDb          /* OUT: SQLite db handle */
+);
+/*
+** Return the error code for the most recent sqlite3_* API call associated
+** with sqlite3 handle 'db'. SQLITE_OK is returned if the most recent
+** API call was successful.
+**
+** Calls to many sqlite3_* functions set the error code and string returned
+** by sqlite3_errcode(), sqlite3_errmsg() and sqlite3_errmsg16()
+** (overwriting the previous values). Note that calls to sqlite3_errcode(),
+** sqlite3_errmsg() and sqlite3_errmsg16() themselves do not affect the
+** results of future invocations.
+**
+** Assuming no other intervening sqlite3_* API calls are made, the error
+** code returned by this function is associated with the same error as
+** the strings  returned by sqlite3_errmsg() and sqlite3_errmsg16().
+*/
+IMPORT_C int sqlite3_errcode(sqlite3 *db);
+/*
+** Return a pointer to a UTF-8 encoded string describing in english the
+** error condition for the most recent sqlite3_* API call. The returned
+** string is always terminated by an 0x00 byte.
+**
+** The string "not an error" is returned when the most recent API call was
+** successful.
+*/
+IMPORT_C const char *sqlite3_errmsg(sqlite3*);
+/*
+** Return a pointer to a UTF-16 native byte order encoded string describing
+** in english the error condition for the most recent sqlite3_* API call.
+** The returned string is always terminated by a pair of 0x00 bytes.
+**
+** The string "not an error" is returned when the most recent API call was
+** successful.
+*/
+const void *sqlite3_errmsg16(sqlite3*);
+/*
+** An instance of the following opaque structure is used to represent
+** a compiled SQL statment.
+*/
+typedef struct sqlite3_stmt sqlite3_stmt;
+/*
+** To execute an SQL query, it must first be compiled into a byte-code
+** program using one of the following routines. The only difference between
+** them is that the second argument, specifying the SQL statement to
+** compile, is assumed to be encoded in UTF-8 for the sqlite3_prepare()
+** function and UTF-16 for sqlite3_prepare16().
+**
+** The first parameter "db" is an SQLite database handle. The second
+** parameter "zSql" is the statement to be compiled, encoded as either
+** UTF-8 or UTF-16 (see above). If the next parameter, "nBytes", is less
+** than zero, then zSql is read up to the first nul terminator.  If
+** "nBytes" is not less than zero, then it is the length of the string zSql
+** in bytes (not characters).
+**
+** *pzTail is made to point to the first byte past the end of the first
+** SQL statement in zSql.  This routine only compiles the first statement
+** in zSql, so *pzTail is left pointing to what remains uncompiled.
+**
+** *ppStmt is left pointing to a compiled SQL statement that can be
+** executed using sqlite3_step().  Or if there is an error, *ppStmt may be
+** set to NULL.  If the input text contained no SQL (if the input is and
+** empty string or a comment) then *ppStmt is set to NULL.
+**
+** On success, SQLITE_OK is returned.  Otherwise an error code is returned.
+*/
+int sqlite3_prepare(
+sqlite3 *db,            /* Database handle */
+const char *zSql,       /* SQL statement, UTF-8 encoded */
+int nBytes,             /* Length of zSql in bytes. */
+sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
+const char **pzTail     /* OUT: Pointer to unused portion of zSql */
+);
+IMPORT_C int sqlite3_prepare16(
+sqlite3 *db,            /* Database handle */
+const void *zSql,       /* SQL statement, UTF-16 encoded */
+int nBytes,             /* Length of zSql in bytes. */
+sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
+const void **pzTail     /* OUT: Pointer to unused portion of zSql */
+);
+/*
+** Pointers to the following two opaque structures are used to communicate
+** with the implementations of user-defined functions.
+*/
+typedef struct sqlite3_context sqlite3_context;
+typedef struct Mem sqlite3_value;
+/*
+** In the SQL strings input to sqlite3_prepare() and sqlite3_prepare16(),
+** one or more literals can be replace by parameters "?" or ":AAA" or
+** "$VVV" where AAA is an identifer and VVV is a variable name according
+** to the syntax rules of the TCL programming language.
+** The value of these parameters (also called "host parameter names") can
+** be set using the routines listed below.
+**
+** In every case, the first parameter is a pointer to the sqlite3_stmt
+** structure returned from sqlite3_prepare().  The second parameter is the
+** index of the parameter.  The first parameter as an index of 1.  For
+** named parameters (":AAA" or "$VVV") you can use
+** sqlite3_bind_parameter_index() to get the correct index value given
+** the parameters name.  If the same named parameter occurs more than
+** once, it is assigned the same index each time.
+**
+** The fifth parameter to sqlite3_bind_blob(), sqlite3_bind_text(), and
+** sqlite3_bind_text16() is a destructor used to dispose of the BLOB or
+** text after SQLite has finished with it.  If the fifth argument is the
+** special value SQLITE_STATIC, then the library assumes that the information
+** is in static, unmanaged space and does not need to be freed.  If the
+** fifth argument has the value SQLITE_TRANSIENT, then SQLite makes its
+** own private copy of the data.
+**
+** The sqlite3_bind_* routine must be called before sqlite3_step() after
+** an sqlite3_prepare() or sqlite3_reset().  Unbound parameterss are
+** interpreted as NULL.
+*/
+IMPORT_C int sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int n, void(*)(void*));
+int sqlite3_bind_double(sqlite3_stmt*, int, double);
+int sqlite3_bind_int(sqlite3_stmt*, int, int);
+IMPORT_C int sqlite3_bind_int64(sqlite3_stmt*, int, sqlite_int64);
+IMPORT_C int sqlite3_bind_null(sqlite3_stmt*, int);
+IMPORT_C int sqlite3_bind_text(sqlite3_stmt*, int, const char*, int n, void(*)(void*));
+IMPORT_C int sqlite3_bind_text16(sqlite3_stmt*, int, const void*, int, void(*)(void*));
+int sqlite3_bind_value(sqlite3_stmt*, int, const sqlite3_value*);
+/*
+** Return the number of parameters in a compiled SQL statement.  This
+** routine was added to support DBD::SQLite.
+*/
+int sqlite3_bind_parameter_count(sqlite3_stmt*);
+/*
+** Return the name of the i-th parameter.  Ordinary parameters "?" are
+** nameless and a NULL is returned.  For parameters of the form :AAA or
+** $VVV the complete text of the parameter name is returned, including
+** the initial ":" or "$".  NULL is returned if the index is out of range.
+*/
+const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);
+/*
+** Return the index of a parameter with the given name.  The name
+** must match exactly.  If no parameter with the given name is found,
+** return 0.
+*/
+int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);
+/*
+** Set all the parameters in the compiled SQL statement to NULL.
+*/
+int sqlite3_clear_bindings(sqlite3_stmt*);
+/*
+** Return the number of columns in the result set returned by the compiled
+** SQL statement. This routine returns 0 if pStmt is an SQL statement
+** that does not return data (for example an UPDATE).
+*/
+int sqlite3_column_count(sqlite3_stmt *pStmt);
+/*
+** The first parameter is a compiled SQL statement. This function returns
+** the column heading for the Nth column of that statement, where N is the
+** second function parameter.  The string returned is UTF-8 for
+** sqlite3_column_name() and UTF-16 for sqlite3_column_name16().
+*/
+IMPORT_C const char *sqlite3_column_name(sqlite3_stmt*,int);
+IMPORT_C const void *sqlite3_column_name16(sqlite3_stmt*,int);
+/*
+** The first parameter to the following calls is a compiled SQL statement.
+** These functions return information about the Nth column returned by
+** the statement, where N is the second function argument.
+**
+** If the Nth column returned by the statement is not a column value,
+** then all of the functions return NULL. Otherwise, the return the
+** name of the attached database, table and column that the expression
+** extracts a value from.
+**
+** As with all other SQLite APIs, those postfixed with "16" return UTF-16
+** encoded strings, the other functions return UTF-8. The memory containing
+** the returned strings is valid until the statement handle is finalized().
+**
+** These APIs are only available if the library was compiled with the
+** SQLITE_ENABLE_COLUMN_METADATA preprocessor symbol defined.
+*/
+const char *sqlite3_column_database_name(sqlite3_stmt*,int);
+const void *sqlite3_column_database_name16(sqlite3_stmt*,int);
+const char *sqlite3_column_table_name(sqlite3_stmt*,int);
+const void *sqlite3_column_table_name16(sqlite3_stmt*,int);
+const char *sqlite3_column_origin_name(sqlite3_stmt*,int);
+const void *sqlite3_column_origin_name16(sqlite3_stmt*,int);
+/*
+** The first parameter is a compiled SQL statement. If this statement
+** is a SELECT statement, the Nth column of the returned result set
+** of the SELECT is a table column then the declared type of the table
+** column is returned. If the Nth column of the result set is not at table
+** column, then a NULL pointer is returned. The returned string is always
+** UTF-8 encoded. For example, in the database schema:
+**
+** CREATE TABLE t1(c1 VARIANT);
+**
+** And the following statement compiled:
+**
+** SELECT c1 + 1, c1 FROM t1;
+**
+** Then this routine would return the string "VARIANT" for the second
+** result column (i==1), and a NULL pointer for the first result column
+** (i==0).
+*/
+const char *sqlite3_column_decltype(sqlite3_stmt *, int i);
+/*
+** The first parameter is a compiled SQL statement. If this statement
+** is a SELECT statement, the Nth column of the returned result set
+** of the SELECT is a table column then the declared type of the table
+** column is returned. If the Nth column of the result set is not at table
+** column, then a NULL pointer is returned. The returned string is always
+** UTF-16 encoded. For example, in the database schema:
+**
+** CREATE TABLE t1(c1 INTEGER);
+**
+** And the following statement compiled:
+**
+** SELECT c1 + 1, c1 FROM t1;
+**
+** Then this routine would return the string "INTEGER" for the second
+** result column (i==1), and a NULL pointer for the first result column
+** (i==0).
+*/
+const void *sqlite3_column_decltype16(sqlite3_stmt*,int);
+/*
+** After an SQL query has been compiled with a call to either
+** sqlite3_prepare() or sqlite3_prepare16(), then this function must be
+** called one or more times to execute the statement.
+**
+** The return value will be either SQLITE_BUSY, SQLITE_DONE,
+** SQLITE_ROW, SQLITE_ERROR, or SQLITE_MISUSE.
+**
+** SQLITE_BUSY means that the database engine attempted to open
+** a locked database and there is no busy callback registered.
+** Call sqlite3_step() again to retry the open.
+**
+** SQLITE_DONE means that the statement has finished executing
+** successfully.  sqlite3_step() should not be called again on this virtual
+** machine.
+**
+** If the SQL statement being executed returns any data, then
+** SQLITE_ROW is returned each time a new row of data is ready
+** for processing by the caller. The values may be accessed using
+** the sqlite3_column_*() functions described below. sqlite3_step()
+** is called again to retrieve the next row of data.
+**
+** SQLITE_ERROR means that a run-time error (such as a constraint
+** violation) has occurred.  sqlite3_step() should not be called again on
+** the VM. More information may be found by calling sqlite3_errmsg().
+**
+** SQLITE_MISUSE means that the this routine was called inappropriately.
+** Perhaps it was called on a virtual machine that had already been
+** finalized or on one that had previously returned SQLITE_ERROR or
+** SQLITE_DONE.  Or it could be the case the the same database connection
+** is being used simulataneously by two or more threads.
+*/
+IMPORT_C int sqlite3_step(sqlite3_stmt*);
+/*
+** Return the number of values in the current row of the result set.
+**
+** After a call to sqlite3_step() that returns SQLITE_ROW, this routine
+** will return the same value as the sqlite3_column_count() function.
+** After sqlite3_step() has returned an SQLITE_DONE, SQLITE_BUSY or
+** error code, or before sqlite3_step() has been called on a
+** compiled SQL statement, this routine returns zero.
+*/
+IMPORT_C int sqlite3_data_count(sqlite3_stmt *pStmt);
+/*
+** Values are stored in the database in one of the following fundamental
+** types.
+*/
+#define SQLITE_INTEGER  1
+#define SQLITE_FLOAT    2
+/* #define SQLITE_TEXT  3  // See below */
+#define SQLITE_BLOB     4
+#define SQLITE_NULL     5
+/*
+** SQLite version 2 defines SQLITE_TEXT differently.  To allow both
+** version 2 and version 3 to be included, undefine them both if a
+** conflict is seen.  Define SQLITE3_TEXT to be the version 3 value.
+*/
+#ifdef SQLITE_TEXT
+# undef SQLITE_TEXT
+#else
+# define SQLITE_TEXT     3
+#endif
+#define SQLITE3_TEXT     3
+/*
+** The next group of routines returns information about the information
+** in a single column of the current result row of a query.  In every
+** case the first parameter is a pointer to the SQL statement that is being
+** executed (the sqlite_stmt* that was returned from sqlite3_prepare()) and
+** the second argument is the index of the column for which information
+** should be returned.  iCol is zero-indexed.  The left-most column as an
+** index of 0.
+**
+** If the SQL statement is not currently point to a valid row, or if the
+** the colulmn index is out of range, the result is undefined.
+**
+** These routines attempt to convert the value where appropriate.  For
+** example, if the internal representation is FLOAT and a text result
+** is requested, sprintf() is used internally to do the conversion
+** automatically.  The following table details the conversions that
+** are applied:
+**
+**    Internal Type    Requested Type     Conversion
+**    -------------    --------------    --------------------------
+**       NULL             INTEGER         Result is 0
+**       NULL             FLOAT           Result is 0.0
+**       NULL             TEXT            Result is an empty string
+**       NULL             BLOB            Result is a zero-length BLOB
+**       INTEGER          FLOAT           Convert from integer to float
+**       INTEGER          TEXT            ASCII rendering of the integer
+**       INTEGER          BLOB            Same as for INTEGER->TEXT
+**       FLOAT            INTEGER         Convert from float to integer
+**       FLOAT            TEXT            ASCII rendering of the float
+**       FLOAT            BLOB            Same as FLOAT->TEXT
+**       TEXT             INTEGER         Use atoi()
+**       TEXT             FLOAT           Use atof()
+**       TEXT             BLOB            No change
+**       BLOB             INTEGER         Convert to TEXT then use atoi()
+**       BLOB             FLOAT           Convert to TEXT then use atof()
+**       BLOB             TEXT            Add a \000 terminator if needed
+**
+** The following access routines are provided:
+**
+** _type()     Return the datatype of the result.  This is one of
+**             SQLITE_INTEGER, SQLITE_FLOAT, SQLITE_TEXT, SQLITE_BLOB,
+**             or SQLITE_NULL.
+** _blob()     Return the value of a BLOB.
+** _bytes()    Return the number of bytes in a BLOB value or the number
+**             of bytes in a TEXT value represented as UTF-8.  The \000
+**             terminator is included in the byte count for TEXT values.
+** _bytes16()  Return the number of bytes in a BLOB value or the number
+**             of bytes in a TEXT value represented as UTF-16.  The \u0000
+**             terminator is included in the byte count for TEXT values.
+** _double()   Return a FLOAT value.
+** _int()      Return an INTEGER value in the host computer's native
+**             integer representation.  This might be either a 32- or 64-bit
+**             integer depending on the host.
+** _int64()    Return an INTEGER value as a 64-bit signed integer.
+** _text()     Return the value as UTF-8 text.
+** _text16()   Return the value as UTF-16 text.
+*/
+IMPORT_C const void *sqlite3_column_blob(sqlite3_stmt*, int iCol);
+IMPORT_C int sqlite3_column_bytes(sqlite3_stmt*, int iCol);
+int sqlite3_column_bytes16(sqlite3_stmt*, int iCol);
+IMPORT_C double sqlite3_column_double(sqlite3_stmt*, int iCol);
+IMPORT_C int sqlite3_column_int(sqlite3_stmt*, int iCol);
+IMPORT_C sqlite_int64 sqlite3_column_int64(sqlite3_stmt*, int iCol);
+IMPORT_C const unsigned char *sqlite3_column_text(sqlite3_stmt*, int iCol);
+IMPORT_C const void *sqlite3_column_text16(sqlite3_stmt*, int iCol);
+int sqlite3_column_type(sqlite3_stmt*, int iCol);
+int sqlite3_column_numeric_type(sqlite3_stmt*, int iCol);
+sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol);
+/*
+** The sqlite3_finalize() function is called to delete a compiled
+** SQL statement obtained by a previous call to sqlite3_prepare()
+** or sqlite3_prepare16(). If the statement was executed successfully, or
+** not executed at all, then SQLITE_OK is returned. If execution of the
+** statement failed then an error code is returned.
+**
+** This routine can be called at any point during the execution of the
+** virtual machine.  If the virtual machine has not completed execution
+** when this routine is called, that is like encountering an error or
+** an interrupt.  (See sqlite3_interrupt().)  Incomplete updates may be
+** rolled back and transactions cancelled,  depending on the circumstances,
+** and the result code returned will be SQLITE_ABORT.
+*/
+IMPORT_C int sqlite3_finalize(sqlite3_stmt *pStmt);
+/*
+** The sqlite3_reset() function is called to reset a compiled SQL
+** statement obtained by a previous call to sqlite3_prepare() or
+** sqlite3_prepare16() back to it's initial state, ready to be re-executed.
+** Any SQL statement variables that had values bound to them using
+** the sqlite3_bind_*() API retain their values.
+*/
+IMPORT_C int sqlite3_reset(sqlite3_stmt *pStmt);
+/*
+** The following two functions are used to add user functions or aggregates
+** implemented in C to the SQL langauge interpreted by SQLite. The
+** difference only between the two is that the second parameter, the
+** name of the (scalar) function or aggregate, is encoded in UTF-8 for
+** sqlite3_create_function() and UTF-16 for sqlite3_create_function16().
+**
+** The first argument is the database handle that the new function or
+** aggregate is to be added to. If a single program uses more than one
+** database handle internally, then user functions or aggregates must
+** be added individually to each database handle with which they will be
+** used.
+**
+** The third parameter is the number of arguments that the function or
+** aggregate takes. If this parameter is negative, then the function or
+** aggregate may take any number of arguments.
+**
+** The fourth parameter is one of SQLITE_UTF* values defined below,
+** indicating the encoding that the function is most likely to handle
+** values in.  This does not change the behaviour of the programming
+** interface. However, if two versions of the same function are registered
+** with different encoding values, SQLite invokes the version likely to
+** minimize conversions between text encodings.
+**
+** The seventh, eighth and ninth parameters, xFunc, xStep and xFinal, are
+** pointers to user implemented C functions that implement the user
+** function or aggregate. A scalar function requires an implementation of
+** the xFunc callback only, NULL pointers should be passed as the xStep
+** and xFinal parameters. An aggregate function requires an implementation
+** of xStep and xFinal, but NULL should be passed for xFunc. To delete an
+** existing user function or aggregate, pass NULL for all three function
+** callback. Specifying an inconstent set of callback values, such as an
+** xFunc and an xFinal, or an xStep but no xFinal, SQLITE_ERROR is
+** returned.
+*/
+int sqlite3_create_function(
+sqlite3 *,
+const char *zFunctionName,
+int nArg,
+int eTextRep,
+void*,
+void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+void (*xFinal)(sqlite3_context*)
+);
+int sqlite3_create_function16(
+sqlite3*,
+const void *zFunctionName,
+int nArg,
+int eTextRep,
+void*,
+void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+void (*xFinal)(sqlite3_context*)
+);
+/*
+** This function is deprecated.  Do not use it.  It continues to exist
+** so as not to break legacy code.  But new code should avoid using it.
+*/
+int sqlite3_aggregate_count(sqlite3_context*);
+/*
+** The next group of routines returns information about parameters to
+** a user-defined function.  Function implementations use these routines
+** to access their parameters.  These routines are the same as the
+** sqlite3_column_* routines except that these routines take a single
+** sqlite3_value* pointer instead of an sqlite3_stmt* and an integer
+** column number.
+*/
+const void *sqlite3_value_blob(sqlite3_value*);
+int sqlite3_value_bytes(sqlite3_value*);
+int sqlite3_value_bytes16(sqlite3_value*);
+double sqlite3_value_double(sqlite3_value*);
+int sqlite3_value_int(sqlite3_value*);
+sqlite_int64 sqlite3_value_int64(sqlite3_value*);
+const unsigned char *sqlite3_value_text(sqlite3_value*);
+const void *sqlite3_value_text16(sqlite3_value*);
+const void *sqlite3_value_text16le(sqlite3_value*);
+const void *sqlite3_value_text16be(sqlite3_value*);
+int sqlite3_value_type(sqlite3_value*);
+int sqlite3_value_numeric_type(sqlite3_value*);
+/*
+** Aggregate functions use the following routine to allocate
+** a structure for storing their state.  The first time this routine
+** is called for a particular aggregate, a new structure of size nBytes
+** is allocated, zeroed, and returned.  On subsequent calls (for the
+** same aggregate instance) the same buffer is returned.  The implementation
+** of the aggregate can use the returned buffer to accumulate data.
+**
+** The buffer allocated is freed automatically by SQLite.
+*/
+void *sqlite3_aggregate_context(sqlite3_context*, int nBytes);
+/*
+** The pUserData parameter to the sqlite3_create_function()
+** routine used to register user functions is available to
+** the implementation of the function using this call.
+*/
+void *sqlite3_user_data(sqlite3_context*);
+/*
+** The following two functions may be used by scalar user functions to
+** associate meta-data with argument values. If the same value is passed to
+** multiple invocations of the user-function during query execution, under
+** some circumstances the associated meta-data may be preserved. This may
+** be used, for example, to add a regular-expression matching scalar
+** function. The compiled version of the regular expression is stored as
+** meta-data associated with the SQL value passed as the regular expression
+** pattern.
+**
+** Calling sqlite3_get_auxdata() returns a pointer to the meta data
+** associated with the Nth argument value to the current user function
+** call, where N is the second parameter. If no meta-data has been set for
+** that value, then a NULL pointer is returned.
+**
+** The sqlite3_set_auxdata() is used to associate meta data with a user
+** function argument. The third parameter is a pointer to the meta data
+** to be associated with the Nth user function argument value. The fourth
+** parameter specifies a 'delete function' that will be called on the meta
+** data pointer to release it when it is no longer required. If the delete
+** function pointer is NULL, it is not invoked.
+**
+** In practice, meta-data is preserved between function calls for
+** expressions that are constant at compile time. This includes literal
+** values and SQL variables.
+*/
+void *sqlite3_get_auxdata(sqlite3_context*, int);
+void sqlite3_set_auxdata(sqlite3_context*, int, void*, void (*)(void*));
+/*
+** These are special value for the destructor that is passed in as the
+** final argument to routines like sqlite3_result_blob().  If the destructor
+** argument is SQLITE_STATIC, it means that the content pointer is constant
+** and will never change.  It does not need to be destroyed.  The
+** SQLITE_TRANSIENT value means that the content will likely change in
+** the near future and that SQLite should make its own private copy of
+** the content before returning.
+*/
+#define SQLITE_STATIC      ((void(*)(void *))0)
+#define SQLITE_TRANSIENT   ((void(*)(void *))-1)
+/*
+** User-defined functions invoke the following routines in order to
+** set their return value.
+*/
+void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
+void sqlite3_result_double(sqlite3_context*, double);
+void sqlite3_result_error(sqlite3_context*, const char*, int);
+void sqlite3_result_error16(sqlite3_context*, const void*, int);
+void sqlite3_result_int(sqlite3_context*, int);
+void sqlite3_result_int64(sqlite3_context*, sqlite_int64);
+void sqlite3_result_null(sqlite3_context*);
+void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*));
+void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*));
+void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*));
+void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*));
+void sqlite3_result_value(sqlite3_context*, sqlite3_value*);
+/*
+** These are the allowed values for the eTextRep argument to
+** sqlite3_create_collation and sqlite3_create_function.
+*/
+#define SQLITE_UTF8           1
+#define SQLITE_UTF16LE        2
+#define SQLITE_UTF16BE        3
+#define SQLITE_UTF16          4    /* Use native byte order */
+#define SQLITE_ANY            5    /* sqlite3_create_function only */
+#define SQLITE_UTF16_ALIGNED  8    /* sqlite3_create_collation only */
+/*
+** These two functions are used to add new collation sequences to the
+** sqlite3 handle specified as the first argument.
+**
+** The name of the new collation sequence is specified as a UTF-8 string
+** for sqlite3_create_collation() and a UTF-16 string for
+** sqlite3_create_collation16(). In both cases the name is passed as the
+** second function argument.
+**
+** The third argument must be one of the constants SQLITE_UTF8,
+** SQLITE_UTF16LE or SQLITE_UTF16BE, indicating that the user-supplied
+** routine expects to be passed pointers to strings encoded using UTF-8,
+** UTF-16 little-endian or UTF-16 big-endian respectively.
+**
+** A pointer to the user supplied routine must be passed as the fifth
+** argument. If it is NULL, this is the same as deleting the collation
+** sequence (so that SQLite cannot call it anymore). Each time the user
+** supplied function is invoked, it is passed a copy of the void* passed as
+** the fourth argument to sqlite3_create_collation() or
+** sqlite3_create_collation16() as its first parameter.
+**
+** The remaining arguments to the user-supplied routine are two strings,
+** each represented by a [length, data] pair and encoded in the encoding
+** that was passed as the third argument when the collation sequence was
+** registered. The user routine should return negative, zero or positive if
+** the first string is less than, equal to, or greater than the second
+** string. i.e. (STRING1 - STRING2).
+*/
+int sqlite3_create_collation(
+sqlite3*,
+const char *zName,
+int eTextRep,
+void*,
+int(*xCompare)(void*,int,const void*,int,const void*)
+);
+int sqlite3_create_collation16(
+sqlite3*,
+const char *zName,
+int eTextRep,
+void*,
+int(*xCompare)(void*,int,const void*,int,const void*)
+);
+/*
+** To avoid having to register all collation sequences before a database
+** can be used, a single callback function may be registered with the
+** database handle to be called whenever an undefined collation sequence is
+** required.
+**
+** If the function is registered using the sqlite3_collation_needed() API,
+** then it is passed the names of undefined collation sequences as strings
+** encoded in UTF-8. If sqlite3_collation_needed16() is used, the names
+** are passed as UTF-16 in machine native byte order. A call to either
+** function replaces any existing callback.
+**
+** When the user-function is invoked, the first argument passed is a copy
+** of the second argument to sqlite3_collation_needed() or
+** sqlite3_collation_needed16(). The second argument is the database
+** handle. The third argument is one of SQLITE_UTF8, SQLITE_UTF16BE or
+** SQLITE_UTF16LE, indicating the most desirable form of the collation
+** sequence function required. The fourth parameter is the name of the
+** required collation sequence.
+**
+** The collation sequence is returned to SQLite by a collation-needed
+** callback using the sqlite3_create_collation() or
+** sqlite3_create_collation16() APIs, described above.
+*/
+int sqlite3_collation_needed(
+sqlite3*,
+void*,
+void(*)(void*,sqlite3*,int eTextRep,const char*)
+);
+int sqlite3_collation_needed16(
+sqlite3*,
+void*,
+void(*)(void*,sqlite3*,int eTextRep,const void*)
+);
+/*
+** Specify the key for an encrypted database.  This routine should be
+** called right after sqlite3_open().
+**
+** The code to implement this API is not available in the public release
+** of SQLite.
+*/
+int sqlite3_key(
+sqlite3 *db,                   /* Database to be rekeyed */
+const void *pKey, int nKey     /* The key */
+);
+/*
+** Change the key on an open database.  If the current database is not
+** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
+** database is decrypted.
+**
+** The code to implement this API is not available in the public release
+** of SQLite.
+*/
+int sqlite3_rekey(
+sqlite3 *db,                   /* Database to be rekeyed */
+const void *pKey, int nKey     /* The new key */
+);
+/*
+** Sleep for a little while. The second parameter is the number of
+** miliseconds to sleep for.
+**
+** If the operating system does not support sleep requests with
+** milisecond time resolution, then the time will be rounded up to
+** the nearest second. The number of miliseconds of sleep actually
+** requested from the operating system is returned.
+*/
+int sqlite3_sleep(int);
+/*
+** Return TRUE (non-zero) if the statement supplied as an argument needs
+** to be recompiled.  A statement needs to be recompiled whenever the
+** execution environment changes in a way that would alter the program
+** that sqlite3_prepare() generates.  For example, if new functions or
+** collating sequences are registered or if an authorizer function is
+** added or changed.
+**
+*/
+IMPORT_C int sqlite3_expired(sqlite3_stmt*);
+/*
+** Move all bindings from the first prepared statement over to the second.
+** This routine is useful, for example, if the first prepared statement
+** fails with an SQLITE_SCHEMA error.  The same SQL can be prepared into
+** the second prepared statement then all of the bindings transfered over
+** to the second statement before the first statement is finalized.
+*/
+int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*);
+/*
+** If the following global variable is made to point to a
+** string which is the name of a directory, then all temporary files
+** created by SQLite will be placed in that directory.  If this variable
+** is NULL pointer, then SQLite does a search for an appropriate temporary
+** file directory.
+**
+** Once sqlite3_open() has been called, changing this variable will invalidate
+** the current temporary database, if any.
+*/
+extern char *sqlite3_temp_directory;
+/*
+** This function is called to recover from a malloc() failure that occured
+** within the SQLite library. Normally, after a single malloc() fails the
+** library refuses to function (all major calls return SQLITE_NOMEM).
+** This function restores the library state so that it can be used again.
+**
+** All existing statements (sqlite3_stmt pointers) must be finalized or
+** reset before this call is made. Otherwise, SQLITE_BUSY is returned.
+** If any in-memory databases are in use, either as a main or TEMP
+** database, SQLITE_ERROR is returned. In either of these cases, the
+** library is not reset and remains unusable.
+**
+** This function is *not* threadsafe. Calling this from within a threaded
+** application when threads other than the caller have used SQLite is
+** dangerous and will almost certainly result in malfunctions.
+**
+** This functionality can be omitted from a build by defining the
+** SQLITE_OMIT_GLOBALRECOVER at compile time.
+*/
+int sqlite3_global_recover(void);
+/*
+** Test to see whether or not the database connection is in autocommit
+** mode.  Return TRUE if it is and FALSE if not.  Autocommit mode is on
+** by default.  Autocommit is disabled by a BEGIN statement and reenabled
+** by the next COMMIT or ROLLBACK.
+*/
+int sqlite3_get_autocommit(sqlite3*);
+/*
+** Return the sqlite3* database handle to which the prepared statement given
+** in the argument belongs.  This is the same database handle that was
+** the first argument to the sqlite3_prepare() that was used to create
+** the statement in the first place.
+*/
+sqlite3 *sqlite3_db_handle(sqlite3_stmt*);
+/*
+** Register a callback function with the database connection identified by the
+** first argument to be invoked whenever a row is updated, inserted or deleted.
+** Any callback set by a previous call to this function for the same
+** database connection is overridden.
+**
+** The second argument is a pointer to the function to invoke when a
+** row is updated, inserted or deleted. The first argument to the callback is
+** a copy of the third argument to sqlite3_update_hook. The second callback
+** argument is one of SQLITE_INSERT, SQLITE_DELETE or SQLITE_UPDATE, depending
+** on the operation that caused the callback to be invoked. The third and
+** fourth arguments to the callback contain pointers to the database and
+** table name containing the affected row. The final callback parameter is
+** the rowid of the row. In the case of an update, this is the rowid after
+** the update takes place.
+**
+** The update hook is not invoked when internal system tables are
+** modified (i.e. sqlite_master and sqlite_sequence).
+**
+** If another function was previously registered, its pArg value is returned.
+** Otherwise NULL is returned.
+*/
+void *sqlite3_update_hook(
+sqlite3*,
+void(*)(void *,int ,char const *,char const *,sqlite_int64),
+void*
+);
+/*
+** Register a callback to be invoked whenever a transaction is rolled
+** back.
+**
+** The new callback function overrides any existing rollback-hook
+** callback. If there was an existing callback, then it's pArg value
+** (the third argument to sqlite3_rollback_hook() when it was registered)
+** is returned. Otherwise, NULL is returned.
+**
+** For the purposes of this API, a transaction is said to have been
+** rolled back if an explicit "ROLLBACK" statement is executed, or
+** an error or constraint causes an implicit rollback to occur. The
+** callback is not invoked if a transaction is automatically rolled
+** back because the database connection is closed.
+*/
+void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*);
+/*
+** This function is only available if the library is compiled without
+** the SQLITE_OMIT_SHARED_CACHE macro defined. It is used to enable or
+** disable (if the argument is true or false, respectively) the
+** "shared pager" feature.
+*/
+int sqlite3_enable_shared_cache(int);
+/*
+** Attempt to free N bytes of heap memory by deallocating non-essential
+** memory allocations held by the database library (example: memory
+** used to cache database pages to improve performance).
+**
+** This function is not a part of standard builds.  It is only created
+** if SQLite is compiled with the SQLITE_ENABLE_MEMORY_MANAGEMENT macro.
+*/
+int sqlite3_release_memory(int);
+/*
+** Place a "soft" limit on the amount of heap memory that may be allocated by
+** SQLite within the current thread. If an internal allocation is requested
+** that would exceed the specified limit, sqlite3_release_memory() is invoked
+** one or more times to free up some space before the allocation is made.
+**
+** The limit is called "soft", because if sqlite3_release_memory() cannot free
+** sufficient memory to prevent the limit from being exceeded, the memory is
+** allocated anyway and the current operation proceeds.
+**
+** This function is only available if the library was compiled with the
+** SQLITE_ENABLE_MEMORY_MANAGEMENT option set.
+** memory-management has been enabled.
+*/
+void sqlite3_soft_heap_limit(int);
+/*
+** This routine makes sure that all thread-local storage has been
+** deallocated for the current thread.
+**
+** This routine is not technically necessary.  All thread-local storage
+** will be automatically deallocated once memory-management and
+** shared-cache are disabled and the soft heap limit has been set
+** to zero.  This routine is provided as a convenience for users who
+** want to make absolutely sure they have not forgotten something
+** prior to killing off a thread.
+*/
+void sqlite3_thread_cleanup(void);
+/*
+** Return meta information about a specific column of a specific database
+** table accessible using the connection handle passed as the first function
+** argument.
+**
+** The column is identified by the second, third and fourth parameters to
+** this function. The second parameter is either the name of the database
+** (i.e. "main", "temp" or an attached database) containing the specified
+** table or NULL. If it is NULL, then all attached databases are searched
+** for the table using the same algorithm as the database engine uses to
+** resolve unqualified table references.
+**
+** The third and fourth parameters to this function are the table and column
+** name of the desired column, respectively. Neither of these parameters
+** may be NULL.
+**
+** Meta information is returned by writing to the memory locations passed as
+** the 5th and subsequent parameters to this function. Any of these
+** arguments may be NULL, in which case the corresponding element of meta
+** information is ommitted.
+**
+** Parameter     Output Type      Description
+** -----------------------------------
+**
+**   5th         const char*      Data type
+**   6th         const char*      Name of the default collation sequence
+**   7th         int              True if the column has a NOT NULL constraint
+**   8th         int              True if the column is part of the PRIMARY KEY
+**   9th         int              True if the column is AUTOINCREMENT
+**
+**
+** The memory pointed to by the character pointers returned for the
+** declaration type and collation sequence is valid only until the next
+** call to any sqlite API function.
+**
+** If the specified table is actually a view, then an error is returned.
+**
+** If the specified column is "rowid", "oid" or "_rowid_" and an
+** INTEGER PRIMARY KEY column has been explicitly declared, then the output
+** parameters are set for the explicitly declared column. If there is no
+** explicitly declared IPK column, then the output parameters are set as
+** follows:
+**
+**     data type: "INTEGER"
+**     collation sequence: "BINARY"
+**     not null: 0
+**     primary key: 1
+**     auto increment: 0
+**
+** This function may load one or more schemas from database files. If an
+** error occurs during this process, or if the requested table or column
+** cannot be found, an SQLITE error code is returned and an error message
+** left in the database handle (to be retrieved using sqlite3_errmsg()).
+**
+** This API is only available if the library was compiled with the
+** SQLITE_ENABLE_COLUMN_METADATA preprocessor symbol defined.
+*/
+int sqlite3_table_column_metadata(
+sqlite3 *db,                /* Connection handle */
+const char *zDbName,        /* Database name or NULL */
+const char *zTableName,     /* Table name */
+const char *zColumnName,    /* Column name */
+char const **pzDataType,    /* OUTPUT: Declared data type */
+char const **pzCollSeq,     /* OUTPUT: Collation sequence name */
+int *pNotNull,              /* OUTPUT: True if NOT NULL constraint exists */
+int *pPrimaryKey,           /* OUTPUT: True if column part of PK */
+int *pAutoinc               /* OUTPUT: True if colums is auto-increment */
+);
+/*
+****** EXPERIMENTAL - subject to change without notice **************
+**
+** Attempt to load an SQLite extension library contained in the file
+** zFile.  The entry point is zProc.  zProc may be 0 in which case the
+** name of the entry point defaults to "sqlite3_extension_init".
+**
+** Return SQLITE_OK on success and SQLITE_ERROR if something goes wrong.
+**
+** If an error occurs and pzErrMsg is not 0, then fill *pzErrMsg with
+** error message text.  The calling function should free this memory
+** by calling sqlite3_free().
+**
+** Extension loading must be enabled using sqlite3_enable_load_extension()
+** prior to calling this API or an error will be returned.
+**
+****** EXPERIMENTAL - subject to change without notice **************
+*/
+int sqlite3_load_extension(
+sqlite3 *db,          /* Load the extension into this database connection */
+const char *zFile,    /* Name of the shared library containing extension */
+const char *zProc,    /* Entry point.  Derived from zFile if 0 */
+char **pzErrMsg       /* Put error message here if not 0 */
+);
+/*
+** So as not to open security holes in older applications that are
+** unprepared to deal with extension load, and as a means of disabling
+** extension loading while executing user-entered SQL, the following
+** API is provided to turn the extension loading mechanism on and
+** off.  It is off by default.  See ticket #1863.
+**
+** Call this routine with onoff==1 to turn extension loading on
+** and call it with onoff==0 to turn it back off again.
+*/
+int sqlite3_enable_load_extension(sqlite3 *db, int onoff);
+/*
+****** EXPERIMENTAL - subject to change without notice **************
+**
+** Register an extension entry point that is automatically invoked
+** whenever a new database connection is opened.
+**
+** This API can be invoked at program startup in order to register
+** one or more statically linked extensions that will be available
+** to all new database connections.
+**
+** Duplicate extensions are detected so calling this routine multiple
+** times with the same extension is harmless.
+**
+** This routine stores a pointer to the extension in an array
+** that is obtained from malloc().  If you run a memory leak
+** checker on your program and it reports a leak because of this
+** array, then invoke sqlite3_automatic_extension_reset() prior
+** to shutdown to free the memory.
+**
+** Automatic extensions apply across all threads.
+*/
+int sqlite3_auto_extension(void *xEntryPoint);
+/*
+****** EXPERIMENTAL - subject to change without notice **************
+**
+** Disable all previously registered automatic extensions.  This
+** routine undoes the effect of all prior sqlite3_automatic_extension()
+** calls.
+**
+** This call disabled automatic extensions in all threads.
+*/
+void sqlite3_reset_auto_extension(void);
+/*
+****** EXPERIMENTAL - subject to change without notice **************
+**
+** The interface to the virtual-table mechanism is currently considered
+** to be experimental.  The interface might change in incompatible ways.
+** If this is a problem for you, do not use the interface at this time.
+**
+** When the virtual-table mechanism stablizes, we will declare the
+** interface fixed, support it indefinitely, and remove this comment.
+*/
+/*
+** Structures used by the virtual table interface
+*/
+typedef struct sqlite3_vtab sqlite3_vtab;
+typedef struct sqlite3_index_info sqlite3_index_info;
+typedef struct sqlite3_vtab_cursor sqlite3_vtab_cursor;
+typedef struct sqlite3_module sqlite3_module;
+/*
+** A module is a class of virtual tables.  Each module is defined
+** by an instance of the following structure.  This structure consists
+** mostly of methods for the module.
+*/
+struct sqlite3_module {
+int iVersion;
+int (*xCreate)(sqlite3*, void *pAux,
+int argc, char **argv,
+sqlite3_vtab **ppVTab);
+int (*xConnect)(sqlite3*, void *pAux,
+int argc, char **argv,
+sqlite3_vtab **ppVTab);
+int (*xBestIndex)(sqlite3_vtab *pVTab, sqlite3_index_info*);
+int (*xDisconnect)(sqlite3_vtab *pVTab);
+int (*xDestroy)(sqlite3_vtab *pVTab);
+int (*xOpen)(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor);
+int (*xClose)(sqlite3_vtab_cursor*);
+int (*xFilter)(sqlite3_vtab_cursor*, int idxNum, const char *idxStr,
+int argc, sqlite3_value **argv);
+int (*xNext)(sqlite3_vtab_cursor*);
+int (*xEof)(sqlite3_vtab_cursor*);
+int (*xColumn)(sqlite3_vtab_cursor*, sqlite3_context*, int);
+int (*xRowid)(sqlite3_vtab_cursor*, sqlite_int64 *pRowid);
+int (*xUpdate)(sqlite3_vtab *, int, sqlite3_value **, sqlite_int64 *);
+int (*xBegin)(sqlite3_vtab *pVTab);
+int (*xSync)(sqlite3_vtab *pVTab);
+int (*xCommit)(sqlite3_vtab *pVTab);
+int (*xRollback)(sqlite3_vtab *pVTab);
+int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName,
+void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
+void **ppArg);
+};
+/*
+** The sqlite3_index_info structure and its substructures is used to
+** pass information into and receive the reply from the xBestIndex
+** method of an sqlite3_module.  The fields under **Inputs** are the
+** inputs to xBestIndex and are read-only.  xBestIndex inserts its
+** results into the **Outputs** fields.
+**
+** The aConstraint[] array records WHERE clause constraints of the
+** form:
+**
+**         column OP expr
+**
+** Where OP is =, <, <=, >, or >=.  The particular operator is stored
+** in aConstraint[].op.  The index of the column is stored in
+** aConstraint[].iColumn.  aConstraint[].usable is TRUE if the
+** expr on the right-hand side can be evaluated (and thus the constraint
+** is usable) and false if it cannot.
+**
+** The optimizer automatically inverts terms of the form "expr OP column"
+** and makes other simplificatinos to the WHERE clause in an attempt to
+** get as many WHERE clause terms into the form shown above as possible.
+** The aConstraint[] array only reports WHERE clause terms in the correct
+** form that refer to the particular virtual table being queried.
+**
+** Information about the ORDER BY clause is stored in aOrderBy[].
+** Each term of aOrderBy records a column of the ORDER BY clause.
+**
+** The xBestIndex method must fill aConstraintUsage[] with information
+** about what parameters to pass to xFilter.  If argvIndex>0 then
+** the right-hand side of the corresponding aConstraint[] is evaluated
+** and becomes the argvIndex-th entry in argv.  If aConstraintUsage[].omit
+** is true, then the constraint is assumed to be fully handled by the
+** virtual table and is not checked again by SQLite.
+**
+** The idxNum and idxPtr values are recorded and passed into xFilter.
+** sqlite3_free() is used to free idxPtr if needToFreeIdxPtr is true.
+**
+** The orderByConsumed means that output from xFilter will occur in
+** the correct order to satisfy the ORDER BY clause so that no separate
+** sorting step is required.
+**
+** The estimatedCost value is an estimate of the cost of doing the
+** particular lookup.  A full scan of a table with N entries should have
+** a cost of N.  A binary search of a table of N entries should have a
+** cost of approximately log(N).
+*/
+struct sqlite3_index_info {
+/* Inputs */
+const int nConstraint;     /* Number of entries in aConstraint */
+const struct sqlite3_index_constraint {
+int iColumn;              /* Column on left-hand side of constraint */
+unsigned char op;         /* Constraint operator */
+unsigned char usable;     /* True if this constraint is usable */
+int iTermOffset;          /* Used internally - xBestIndex should ignore */
+} *const aConstraint;      /* Table of WHERE clause constraints */
+const int nOrderBy;        /* Number of terms in the ORDER BY clause */
+const struct sqlite3_index_orderby {
+int iColumn;              /* Column number */
+unsigned char desc;       /* True for DESC.  False for ASC. */
+} *const aOrderBy;         /* The ORDER BY clause */
+/* Outputs */
+struct sqlite3_index_constraint_usage {
+int argvIndex;           /* if >0, constraint is part of argv to xFilter */
+unsigned char omit;      /* Do not code a test for this constraint */
+} *const aConstraintUsage;
+int idxNum;                /* Number used to identify the index */
+char *idxStr;              /* String, possibly obtained from sqlite3_malloc */
+int needToFreeIdxStr;      /* Free idxStr using sqlite3_free() if true */
+int orderByConsumed;       /* True if output is already ordered */
+double estimatedCost;      /* Estimated cost of using this index */
+};
+#define SQLITE_INDEX_CONSTRAINT_EQ    2
+#define SQLITE_INDEX_CONSTRAINT_GT    4
+#define SQLITE_INDEX_CONSTRAINT_LE    8
+#define SQLITE_INDEX_CONSTRAINT_LT    16
+#define SQLITE_INDEX_CONSTRAINT_GE    32
+#define SQLITE_INDEX_CONSTRAINT_MATCH 64
+/*
+** This routine is used to register a new module name with an SQLite
+** connection.  Module names must be registered before creating new
+** virtual tables on the module, or before using preexisting virtual
+** tables of the module.
+*/
+int sqlite3_create_module(
+sqlite3 *db,               /* SQLite connection to register module with */
+const char *zName,         /* Name of the module */
+const sqlite3_module *,    /* Methods for the module */
+void *                     /* Client data for xCreate/xConnect */
+);
+/*
+** Every module implementation uses a subclass of the following structure
+** to describe a particular instance of the module.  Each subclass will
+** be taylored to the specific needs of the module implementation.   The
+** purpose of this superclass is to define certain fields that are common
+** to all module implementations.
+*/
+struct sqlite3_vtab {
+const sqlite3_module *pModule;  /* The module for this virtual table */
+int nRef;                       /* Used internally */
+/* Virtual table implementations will typically add additional fields */
+};
+/* Every module implementation uses a subclass of the following structure
+** to describe cursors that point into the virtual table and are used
+** to loop through the virtual table.  Cursors are created using the
+** xOpen method of the module.  Each module implementation will define
+** the content of a cursor structure to suit its own needs.
+**
+** This superclass exists in order to define fields of the cursor that
+** are common to all implementations.
+*/
+struct sqlite3_vtab_cursor {
+sqlite3_vtab *pVtab;      /* Virtual table of this cursor */
+/* Virtual table implementations will typically add additional fields */
+};
+/*
+** The xCreate and xConnect methods of a module use the following API
+** to declare the format (the names and datatypes of the columns) of
+** the virtual tables they implement.
+*/
+int sqlite3_declare_vtab(sqlite3*, const char *zCreateTable);
+/*
+** The interface to the virtual-table mechanism defined above (back up
+** to a comment remarkably similar to this one) is currently considered
+** to be experimental.  The interface might change in incompatible ways.
+** If this is a problem for you, do not use the interface at this time.
+**
+** When the virtual-table mechanism stablizes, we will declare the
+** interface fixed, support it indefinitely, and remove this comment.
+**
+****** EXPERIMENTAL - subject to change without notice **************
+*/
+/*
+** Undo the hack that converts floating point types to integer for
+** builds on processors without floating point support.
+*/
+#ifdef SQLITE_OMIT_FLOATING_POINT
+# undef double
+#endif
+#ifdef __cplusplus
+}  /* End of the 'extern "C"' block */
+#endif
+#endif