/*
** Allocate space for a file-handle and open a temporary file. If successful,
** set *ppFile to point to the malloc'd file-handle and return SQLITE_OK.
** Otherwise, set *ppFile to 0 and return an SQLite error code.
*/
static int vdbeSorterOpenTempFile(sqlite3 *db, sqlite3_file **ppFile){
int dummy;
return sqlite3OsOpenMalloc(db->pVfs, 0, ppFile,
SQLITE_OPEN_TEMP_JOURNAL |
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE |
SQLITE_OPEN_EXCLUSIVE | SQLITE_OPEN_DELETEONCLOSE, &dummy
);
}
/*
** Usage: fake_big_file N FILENAME
**
** Write a few bytes at the N megabyte point of FILENAME. This will
** create a large file. If the file was a valid SQLite database, then
** the next time the database is opened, SQLite will begin allocating
** new pages after N. If N is 2096 or bigger, this will test the
** ability of SQLite to write to large files.
*/
static int fake_big_file(
void *NotUsed,
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int argc, /* Number of arguments */
const char **argv /* Text of each argument */
){
sqlite3_vfs *pVfs;
sqlite3_file *fd = 0;
int rc;
int n;
i64 offset;
char *zFile;
int nFile;
if( argc!=3 ){
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" N-MEGABYTES FILE\"", 0);
return TCL_ERROR;
}
if( Tcl_GetInt(interp, argv[1], &n) ) return TCL_ERROR;
/* this does not work with MDB */
return TCL_ERROR;
pVfs = sqlite3_vfs_find(0);
nFile = (int)strlen(argv[2]);
zFile = sqlite3_malloc( nFile+2 );
if( zFile==0 ) return TCL_ERROR;
memcpy(zFile, argv[2], nFile+1);
zFile[nFile+1] = 0;
rc = sqlite3OsOpenMalloc(pVfs, zFile, &fd,
(SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB), 0
);
if( rc ){
Tcl_AppendResult(interp, "open failed: ", sqlite3ErrName(rc), 0);
sqlite3_free(zFile);
return TCL_ERROR;
}
offset = n;
offset *= 1024*1024;
rc = sqlite3OsWrite(fd, "Hello, World!", 14, offset);
sqlite3OsCloseFree(fd);
sqlite3_free(zFile);
if( rc ){
Tcl_AppendResult(interp, "write failed: ", sqlite3ErrName(rc), 0);
return TCL_ERROR;
}
return TCL_OK;
}
/*
** Usage: fake_big_file N FILENAME
**
** Write a few bytes at the N megabyte point of FILENAME. This will
** create a large file. If the file was a valid SQLite database, then
** the next time the database is opened, SQLite will begin allocating
** new pages after N. If N is 2096 or bigger, this will test the
** ability of SQLite to write to large files.
*/
static int fake_big_file(
void *NotUsed,
Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
int argc, /* Number of arguments */
const char **argv /* Text of each argument */
){
sqlite3_vfs *pVfs;
sqlite3_file *fd = 0;
int rc;
int n;
i64 offset;
if( argc!=3 ){
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" N-MEGABYTES FILE\"", 0);
return TCL_ERROR;
}
if( Tcl_GetInt(interp, argv[1], &n) ) return TCL_ERROR;
/*
* This does not work with Berkeley DB. Making a large file does not cause
* DB to skip the existing pages.
*/
return TCL_ERROR;
pVfs = sqlite3_vfs_find(0);
rc = sqlite3OsOpenMalloc(pVfs, argv[2], &fd,
(SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB), 0
);
if( rc ){
Tcl_AppendResult(interp, "open failed: ", errorName(rc), 0);
return TCL_ERROR;
}
offset = n;
offset *= 1024*1024;
rc = sqlite3OsWrite(fd, "Hello, World!", 14, offset);
sqlite3OsCloseFree(fd);
if( rc ){
Tcl_AppendResult(interp, "write failed: ", errorName(rc), 0);
return TCL_ERROR;
}
return TCL_OK;
}
static int fake_big_file(
void *NotUsed,
Tcl_Interp *interp,
int argc,
const char **argv
){
sqlite3_vfs *pVfs;
sqlite3_file *fd = 0;
int rc;
int n;
i64 offset;
if( argc!=3 ){
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" N-MEGABYTES FILE\"", 0);
return TCL_ERROR;
}
if( Tcl_GetInt(interp, argv[1], &n) ) return TCL_ERROR;
pVfs = sqlite3_vfs_find(0);
rc = sqlite3OsOpenMalloc(pVfs, argv[2], &fd,
(SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB), 0
);
if( rc ){
Tcl_AppendResult(interp, "open failed: ", errorName(rc), 0);
return TCL_ERROR;
}
offset = n;
offset *= 1024*1024;
rc = sqlite3OsWrite(fd, "Hello, World!", 14, offset);
sqlite3OsCloseFree(fd);
if( rc ){
Tcl_AppendResult(interp, "write failed: ", errorName(rc), 0);
return TCL_ERROR;
}
return TCL_OK;
}