PX_get_data_blob — Get blob data field

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

                                                                                             PX_GET_DATA_BLOB(3)

       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.

       PX_get_data_blob — Get blob data field

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

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)

       #include <paradox.h>

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