debian man page for px_get_data_blob

PX_GET_DATA_BLOB(3)					     Library Functions Manual					       PX_GET_DATA_BLOB(3)

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 suc-
       cessfully.   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)