payload_constructor_t

typedef int(* payload_constructor_t) (void *payload_descriptor, uint8_t *buffer, uint32_t *len)

#include <include/nfc/ndef/record.h>

Payload constructor type.

A payload constructor is a function for constructing the payload of an NDEF record.

Parameters

payload_descriptor	Pointer to the input data for the constructor.
buffer	Pointer to the payload destination. If NULL, function will calculate the expected size of the record payload. *
len	Size of the available memory to write as input. Size of the generated record payload as output. The implementation must check if the payload will fit in the provided buffer. This must be checked by the caller function.

Return values

0	If the operation was successful. Otherwise, a (negative) error code is returned.