px_read_blobdata(3) [debian man page]

PX_READ_BLOBDATA(3)					     Library Functions Manual					       PX_READ_BLOBDATA(3)

NAME

       PX_read_blobdata -- Read blob from file (deprecated)

SYNOPSIS

       #include <paradox.h>

       char* PX_read_blobdata(pxblob_t *pxblob, const char *data, int len, int *mod_nr, int *blobsize)

DESCRIPTION

       Reads  blob data from the given blob document (.MB file) passed as the first parameter. data is the data stored in the blob field of the db
       file. len is the length of that field. The function hides everything needed for evaluating the field data. It can handle both  single  blob
       blocks and suballocated blocks.

       This function is deprecated. Use PX_set_blob_file(3)		   and PX_get_data_blob(3)	      or PX_get_data_graphic(3) instead.

RETURNS

       Returns	NULL  in case of an error or a pointer to the blob data. mod_nr contains the modification number of the blob and blobsize contains
       the length of the blob data. The modification number can be used as a unique id for the blob.

AUTHOR

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

															       PX_READ_BLOBDATA(3)

PX_GET_DATA_GRAPHIC(3)					     Library Functions Manual					    PX_GET_DATA_GRAPHIC(3)

NAME

       PX_get_data_graphic -- Get graphic data field

SYNOPSIS

       #include <paradox.h>

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

DESCRIPTION

       Reads a graphic data field. This function may be used only for blobs 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_graphic 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.  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_blob(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_GRAPHIC(3)