1 /* $OpenBSD: iobuf.h,v 1.7 2021/07/28 19:39:50 benno 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 18 struct ioqbuf { 19 struct ioqbuf *next; 20 char *buf; 21 size_t size; 22 size_t wpos; 23 size_t rpos; 24 }; 25 26 struct 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 38 struct 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 45 int iobuf_init(struct iobuf *, size_t, size_t); 46 void iobuf_clear(struct iobuf *); 47 48 int iobuf_extend(struct iobuf *, size_t); 49 void iobuf_normalize(struct iobuf *); 50 void iobuf_drop(struct iobuf *, size_t); 51 size_t iobuf_space(struct iobuf *); 52 size_t iobuf_len(struct iobuf *); 53 size_t iobuf_left(struct iobuf *); 54 char *iobuf_data(struct iobuf *); 55 char *iobuf_getline(struct iobuf *, size_t *); 56 ssize_t iobuf_read(struct iobuf *, int); 57 ssize_t iobuf_read_tls(struct iobuf *, struct tls *); 58 59 size_t iobuf_queued(struct iobuf *); 60 void* iobuf_reserve(struct iobuf *, size_t); 61 int iobuf_queue(struct iobuf *, const void*, size_t); 62 int iobuf_queuev(struct iobuf *, const struct iovec *, int); 63 int iobuf_fqueue(struct iobuf *, const char *, ...) 64 __attribute__((__format__ (printf, 2, 3))); 65 int iobuf_vfqueue(struct iobuf *, const char *, va_list); 66 int iobuf_flush(struct iobuf *, int); 67 int iobuf_flush_tls(struct iobuf *, struct tls *); 68 ssize_t iobuf_write(struct iobuf *, int); 69 ssize_t iobuf_write_tls(struct iobuf *, struct tls *); 70