iobuf.h revision 1.6
1/* $OpenBSD: iobuf.h,v 1.6 2021/03/05 12:37:32 eric Exp $ */ 2/* 3 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18struct ioqbuf { 19 struct ioqbuf *next; 20 char *buf; 21 size_t size; 22 size_t wpos; 23 size_t rpos; 24}; 25 26struct iobuf { 27 char *buf; 28 size_t max; 29 size_t size; 30 size_t wpos; 31 size_t rpos; 32 33 size_t queued; 34 struct ioqbuf *outq; 35 struct ioqbuf *outqlast; 36}; 37 38struct tls; 39 40#define IOBUF_WANT_READ -1 41#define IOBUF_WANT_WRITE -2 42#define IOBUF_CLOSED -3 43#define IOBUF_ERROR -4 44 45int iobuf_init(struct iobuf *, size_t, size_t); 46void iobuf_clear(struct iobuf *); 47 48int iobuf_extend(struct iobuf *, size_t); 49void iobuf_normalize(struct iobuf *); 50void iobuf_drop(struct iobuf *, size_t); 51size_t iobuf_space(struct iobuf *); 52size_t iobuf_len(struct iobuf *); 53size_t iobuf_left(struct iobuf *); 54char *iobuf_data(struct iobuf *); 55char *iobuf_getline(struct iobuf *, size_t *); 56ssize_t iobuf_read(struct iobuf *, int); 57ssize_t iobuf_read_tls(struct iobuf *, struct tls *); 58 59size_t iobuf_queued(struct iobuf *); 60void* iobuf_reserve(struct iobuf *, size_t); 61int iobuf_queue(struct iobuf *, const void*, size_t); 62int iobuf_queuev(struct iobuf *, const struct iovec *, int); 63int iobuf_fqueue(struct iobuf *, const char *, ...); 64int iobuf_vfqueue(struct iobuf *, const char *, va_list); 65int iobuf_flush(struct iobuf *, int); 66int iobuf_flush_tls(struct iobuf *, struct tls *); 67ssize_t iobuf_write(struct iobuf *, int); 68ssize_t iobuf_write_tls(struct iobuf *, struct tls *); 69