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evtag(3) Library Functions Manual evtag(3) NAME evtag - Helper functions for reading and writing tagged data onto buffers. SYNOPSIS #include <event2/tag.h> #include <event2/event-config.h> #include <event2/util.h> Functions int evtag_consume (struct evbuffer *evbuf) void evtag_encode_int (struct evbuffer *evbuf, ev_uint32_t number) Encode an integer and store it in an evbuffer. void evtag_encode_int64 (struct evbuffer *evbuf, ev_uint64_t number) void evtag_init (void) void evtag_marshal (struct evbuffer *evbuf, ev_uint32_t tag, const void *data, ev_uint32_t len) void evtag_marshal_buffer (struct evbuffer *evbuf, ev_uint32_t tag, struct evbuffer *data) void evtag_marshal_int (struct evbuffer *evbuf, ev_uint32_t tag, ev_uint32_t integer) void evtag_marshal_int64 (struct evbuffer *evbuf, ev_uint32_t tag, ev_uint64_t integer) void evtag_marshal_string (struct evbuffer *buf, ev_uint32_t tag, const char *string) void evtag_marshal_timeval (struct evbuffer *evbuf, ev_uint32_t tag, struct timeval *tv) int evtag_payload_length (struct evbuffer *evbuf, ev_uint32_t *plength) int evtag_peek (struct evbuffer *evbuf, ev_uint32_t *ptag) int evtag_peek_length (struct evbuffer *evbuf, ev_uint32_t *plength) int evtag_unmarshal (struct evbuffer *src, ev_uint32_t *ptag, struct evbuffer *dst) int evtag_unmarshal_fixed (struct evbuffer *src, ev_uint32_t need_tag, void *data, size_t len) int evtag_unmarshal_header (struct evbuffer *evbuf, ev_uint32_t *ptag) Unmarshals the header and returns the length of the payload. int evtag_unmarshal_int (struct evbuffer *evbuf, ev_uint32_t need_tag, ev_uint32_t *pinteger) int evtag_unmarshal_int64 (struct evbuffer *evbuf, ev_uint32_t need_tag, ev_uint64_t *pinteger) int evtag_unmarshal_string (struct evbuffer *evbuf, ev_uint32_t need_tag, char **pstring) int evtag_unmarshal_timeval (struct evbuffer *evbuf, ev_uint32_t need_tag, struct timeval *ptv) Detailed Description Helper functions for reading and writing tagged data onto buffers. Function Documentation void evtag_encode_int (struct evbuffer *evbuf, ev_uint32_tnumber) Encode an integer and store it in an evbuffer. We encode integers by nybbles; the first nibble contains the number of significant nibbles - 1; this allows us to encode up to 64-bit integers. This function is byte-order independent. Parameters: evbuf evbuffer to store the encoded number number a 32-bit integer int evtag_unmarshal_header (struct evbuffer *evbuf, ev_uint32_t *ptag) Unmarshals the header and returns the length of the payload. Parameters: evbuf the buffer from which to unmarshal data ptag a pointer in which the tag id is being stored Returns: -1 on failure or the number of bytes in the remaining payload. Author Generated automatically by Doxygen for libevent from the source code. libevent Tue Jan 27 2015 evtag(3)