NAME
PX_retrieve_record — Returns record in Paradox file
SYNOPSIS
#include <paradox.h>
pxval_t ** PX_retrieve_record(pxdoc_t *pxdoc, int recno)
DESCRIPTION
Returns the record with the given number in a Paradox file. The first
record has number 0, the last one has number_of_records-1.
If you are accessing several records, do it in ascending order, because
this is the most efficient way.
The return value is an array of field values. Each value is stored in a
structure like the following:
typedef struct px_val pxval_t;
struct px_val {
char isnull;
int type;
union {
long lval;
double dval;
struct {
char *val;
int len;
} str;
} value;
};
The element isnull is set to 1 if the value is NULL otherwise it is set
to 0. type is the type of the paradox field as defined in
paradox.h. A field value can be either a long int, a double or a
string, depending on the paradox field type. The paradox field types
pxfShort, pxfLong, pxfDate, pxfTime, pxfLogical, and pxfAutoInc are
returned as long int values. pxfTimestamp, pxfNumber, and pxfCurrency
are returned as double values and all remaining paradox field types are
stored as strings with the length in value.len. You can rely on strings
being Null terminated. Blobs are stored as string but are not guarented
to be Null terminated.
The paradox field types pxfTimestamp, pxfTime, an pxfDate use an
uncommon format which can be converted into a string with
PX_timestamp2string(3), PX_time2string(3), and PX_date2string(3).
RETURN VALUE
Returns a pointer on success and NULL on failure.
SEE ALSO
PX_update_record(3), PX_timestamp2string(3), PX_time2string(3),
PX_date2string(3)
AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx.