NAME

       PX_get_data_blob — Get blob data field

SYNOPSIS

       #include <paradox.h>

       int  PX_get_data_blob(pxdoc_t  *pxdoc,  char *data, int len, int *mod, int *blobsize, char
       **value)

DESCRIPTION

       Reads a blob data field. This function may be used for  all  types  of  blobs  except  for
       fields of type pxfGraphic.

       data points to the start of the data field in the record. It must be calculated by summing
       up all field length before the field to operate on and add it to the base pointer  of  the
       record. You should use this function instead of accessing the data directly.

       PX_get_data_blob  returns  blob  data stored in the record itself, or in an MB files which
       must have been set with PX_set_blob_file(3).

       The function allocates memory for the data returned in *value. This memory has to be freed
       by  the  application,  if the function returns successfully.  The amount of memory for the
       blob is returned in *blobsize. *mod returns the so called modification number of the  blob
       which can often be used as an unique id for creating file names, if the data is saved in a
       file.

              Note:

              This function is deprecated and obsolete if PX_retrieve_record(3) is used.

RETURN VALUE

       Returns 0 if the value is NULL, -1 in case of an error and 1 otherwise.

SEE ALSO

       PX_get_data_graphic(3),  PX_get_data_bcd(3),   PX_get_data_byte(3),   PX_get_data_long(3),
       PX_get_data_short(3),   PX_get_data_double(3),  PX_get_data_byte(3),  PX_get_data_bytes(3)

AUTHOR

       This manual page was written by Uwe Steinmann uwe@steinmann.cx.

                                                                              PX_GET_DATA_BLOB(3)