NAME
DlpOpenDB, DlpCreateDB, DlpCloseDB, DlpDeleteDB – elementary operations on Palm databases
LIBRARY
libpconn
SYNOPSIS
#include <palm.h>
#include <pconn/pconn.h>
int
DlpOpenDB(PConnection *pconn, int card, const char *name, ubyte mode, ubyte *dbhandle);
int
DlpCreateDB(PConnection *pconn, const struct dlp_createdbreq *newdb, ubyte *dbhandle);
int
DlpCloseDB(PConnection *pconn, ubyte dbhandle);
int
DlpDeleteDB(PConnection *pconn, const int card, const char *name);
DESCRIPTION
DlpOpenDB opens an existing database on the Palm, similar to opening a file.
card specifies the number of the memory card on which the database is stored. This is usually 0.
name specifies the name of the database to open. It is case-sensitive, and does not include the “.pdb” or “.prc” extension.
mode specifies how to open the database. It is the bitwise-or of one or more of the following:
- DLPCMD_MODE_SECRET
-
Show private records.
- DLPCMD_MODE_EXCLUSIVE
-
I don't know what this does.
- DLPCMD_MODE_WRITE
-
Open database for writing.
- DLPCMD_MODE_READ
-
Open database for reading.
dbhandle is filled in with a database handle, similar to a file descriptor, which will be used to refer to the database in later operations.
DlpCreateDB creates and opens a new database on the Palm.
newdb is the following structure:
struct dlp_createdbreq
{
udword creator;
udword type;
ubyte card;
uword flags;
uword version;
char name[DLPCMD_DBNAME_LEN];
};
where creator and type are four-character constants, with the first character in the most-significant eight bits; card specifies the number of the memory card on which to create the database, usually 0; flags are the same as the flags argument to DlpOpenDB; version is a version number; and name specifies the name of the new database.
dbhandle is filled in with a database handle, as with OpenDB.
DlpCloseDB closes the open database whose handle is dbhandle. If dbhandle is the special value DLPCMD_CLOSEALLDBS, then all open databases are closed.
DlpDeleteDB deletes a database, which must already be closed.
card specifies the number of the memory card on which the database is stored, usually 0.
name specifies the name of the database to delete. It does not include the “.pdb” or “.prc” extension.
RETURN VALUE
These functions all return 0 if they are successful, or a negative value in case of error.