px_get_data_graphic(3) [debian man page]

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)

PX_INSERT_RECORD(3)					     Library Functions Manual					       PX_INSERT_RECORD(3)

NAME

       PX_insert_record -- Inserts a new record in the Paradox file

SYNOPSIS

       #include <paradox.h>

       int PX_insert_record(pxdoc_t *pxdoc, pxval_t **dataptr)

DESCRIPTION

       Inserts a new record stored in the array dataptr 	into a Paradox file. The position of the record will be determined by the function
       itself, starting at the beginning of the file and searching towards the end for a free slot. A free slot can be the result of former  calls
       of  PX_delete_record(3) or not completely filled data blocks in the input file. If there is no free slot within the file, then a new record
       will be added at the end.

       Blobs will be automatically written if a blob file was set with PX_set_blob_file(3).

       The memory for dataptr and the field values can be freed after PX_insert_record has been called.

       Each single element in the array of pointers to pxval_t can be easily created with MAKE_PXVAL(pxdoc_t *pxdoc, pxval_t *val)	       and
       setting the actual value afterwards. A quite common way to build up the record is the following:

       dataptr = (pxval_t **) malloc(PX_get_num_fields(pxdoc)*sizeof(pxval_t *));
       MAKE_PXVAL(pxdoc, dataptr[0]);
       dataptr[0]->type = pxfLong;
       dataptr[0]->value.lval = 45;
       dataptr[1]->type = pxfAlpha;
       dataptr[1]->value.str.val = "test";
       dataptr[1]->value.str.len = 4;
       PX_insert_record(pxdoc, dataptr);
       free(dataptr[0]);
       free(dataptr[1]);
       free(dataptr);

       There is currently no need to set the type, though it is recommended.

       The field types pxfMemoBLOb and pxfFmtMemoBLOb are treated like strings.

       Fields  of  type pxfAutoInc are automatically incremented if its value is set to NULL. In such a case the value is taken from the header of
       the database. You should not have more than one field of type pxfAutoInc in your database, otherwise the automatic incrementation will  not
       work.

RETURN VALUE

       Returns the record number on success or -1 on failure. The number of the first record is 0.

SEE ALSO

       PX_retrieve_record(3), PX_delete_record(3), PX_update_record(3)

AUTHOR

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

															       PX_INSERT_RECORD(3)