Hi,
sqlite3_open takes a Pointer-Pointer as 2nd argument:
int sqlite3_open(
const char *filename, /* Database filename (UTF-8) */
sqlite3 **ppDb /* OUT: SQLite db handle */
);
This is what your compiler tries to tell you:
safecalls.c:152: warning: passing argument 2 of ‘sqlite3_open’ from
incompatible pointer type
So, you have to declare your own function like this as well:
int safe_sqlite3_open(char *tablename, sqlite3 **db)
{
int retval;
retval = sqlite3_open(tablename, db);
if(retval != SQLITE_OK)
HandleError(retval, "sqlite3_open", "Can't open database:
%s", sqlite3_errmsg(*db));
return retval;
}
And call it like this:
sqlite3 *MyDb;
safe_sqlite3_open("MyDatabaseFile.db3", &MyDb)
Martin
TW wrote:
> I made a safe_sqlite3_open function like this:
>
> /* From sqlite.c --> query_and_populate function */
> int safe_sqlite3_open(char *tablename, sqlite3 *db)
> {
> int retval;
>
> retval = sqlite3_open(tablename, db);
>
> if(retval != SQLITE_OK)
> HandleError(retval, "sqlite3_open", "Can't open
> database: %s", sqlite3_errmsg(db));
>
> return retval;
> }
>
> In normal usage, I call the function like this:
>
> /* From safecalls.c --> safe_sqlite3_open */
> sqlite3 *db;
>
> rc = safe_sqlite3_open(tablename, &db);
>
> When I run make, though, I get these errors:
>
> gcc -g -c cursedj.c -o cursedj.o
> gcc -g -c musicinfo.c -o musicinfo.o
> gcc -g -c sqlite.c -o sqlite.o
> sqlite.c: In function ‘query_and_populate’:
> sqlite.c:14: warning: passing argument 2 of ‘safe_sqlite3_open’
> from incompatible pointer type
> gcc -g -c winmanip.c -o winmanip.o
> gcc -g -c output.c -o output.o
> gcc -g -c dhandler.c -o dhandler.o
> gcc -g -c help.c -o help.o
> gcc -g -c file.c -o file.o
> gcc -g -c safecalls.c -o safecalls.o
> safecalls.c: In function ‘safe_sqlite3_open’:
> safecalls.c:152: warning: passing argument 2 of ‘sqlite3_open’
> from incompatible pointer type
> gcc -Wall -g -lm -lncurses -lsqlite3 -o cursedj cursedj.o
> musicinfo.o sqlite.o winmanip.o \
> output.o dhandler.o help.o file.o safecalls.o
>
> I know that they're just warnings, but, how can I pass the sqlite3
> pointer to my safe function
> without getting any errors? I've tried making the function parameters "*&",
> "&", passing the "address of"
> to the function...all to no avail, except what I have now, but I get those
> warnings, BUT, the code does
> work and my program runs the way it is above.
>
>
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