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/* $OpenBSD: iobuf.h,v 1.7 2021/07/28 19:39:50 benno Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
struct ioqbuf {
struct ioqbuf *next;
char *buf;
size_t size;
size_t wpos;
size_t rpos;
};
struct iobuf {
char *buf;
size_t max;
size_t size;
size_t wpos;
size_t rpos;
size_t queued;
struct ioqbuf *outq;
struct ioqbuf *outqlast;
};
struct tls;
#define IOBUF_WANT_READ -1
#define IOBUF_WANT_WRITE -2
#define IOBUF_CLOSED -3
#define IOBUF_ERROR -4
int iobuf_init(struct iobuf *, size_t, size_t);
void iobuf_clear(struct iobuf *);
int iobuf_extend(struct iobuf *, size_t);
void iobuf_normalize(struct iobuf *);
void iobuf_drop(struct iobuf *, size_t);
size_t iobuf_space(struct iobuf *);
size_t iobuf_len(struct iobuf *);
size_t iobuf_left(struct iobuf *);
char *iobuf_data(struct iobuf *);
char *iobuf_getline(struct iobuf *, size_t *);
ssize_t iobuf_read(struct iobuf *, int);
ssize_t iobuf_read_tls(struct iobuf *, struct tls *);
size_t iobuf_queued(struct iobuf *);
void* iobuf_reserve(struct iobuf *, size_t);
int iobuf_queue(struct iobuf *, const void*, size_t);
int iobuf_queuev(struct iobuf *, const struct iovec *, int);
int iobuf_fqueue(struct iobuf *, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
int iobuf_vfqueue(struct iobuf *, const char *, va_list);
int iobuf_flush(struct iobuf *, int);
int iobuf_flush_tls(struct iobuf *, struct tls *);
ssize_t iobuf_write(struct iobuf *, int);
ssize_t iobuf_write_tls(struct iobuf *, struct tls *);
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