c4e20cad00
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
181 lines
5.3 KiB
C
181 lines
5.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Portions of this software were developed under sponsorship from Snow
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* B.V., the Netherlands.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_TTYQUEUE_H_
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#define _SYS_TTYQUEUE_H_
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#ifndef _SYS_TTY_H_
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#error "can only be included through <sys/tty.h>"
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#endif /* !_SYS_TTY_H_ */
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struct tty;
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struct ttyinq_block;
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struct ttyoutq_block;
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struct uio;
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/* Data input queue. */
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struct ttyinq {
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struct ttyinq_block *ti_firstblock;
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struct ttyinq_block *ti_startblock;
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struct ttyinq_block *ti_reprintblock;
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struct ttyinq_block *ti_lastblock;
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unsigned int ti_begin;
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unsigned int ti_linestart;
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unsigned int ti_reprint;
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unsigned int ti_end;
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unsigned int ti_nblocks;
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unsigned int ti_quota;
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};
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#define TTYINQ_DATASIZE 128
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/* Data output queue. */
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struct ttyoutq {
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struct ttyoutq_block *to_firstblock;
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struct ttyoutq_block *to_lastblock;
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unsigned int to_begin;
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unsigned int to_end;
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unsigned int to_nblocks;
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unsigned int to_quota;
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};
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#define TTYOUTQ_DATASIZE (256 - sizeof(struct ttyoutq_block *))
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#ifdef _KERNEL
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/* Input queue handling routines. */
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int ttyinq_setsize(struct ttyinq *ti, struct tty *tp, size_t len);
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void ttyinq_free(struct ttyinq *ti);
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int ttyinq_read_uio(struct ttyinq *ti, struct tty *tp, struct uio *uio,
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size_t readlen, size_t flushlen);
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size_t ttyinq_write(struct ttyinq *ti, const void *buf, size_t len,
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int quote);
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int ttyinq_write_nofrag(struct ttyinq *ti, const void *buf, size_t len,
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int quote);
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void ttyinq_canonicalize(struct ttyinq *ti);
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size_t ttyinq_findchar(struct ttyinq *ti, const char *breakc, size_t maxlen,
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char *lastc);
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void ttyinq_flush(struct ttyinq *ti);
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int ttyinq_peekchar(struct ttyinq *ti, char *c, int *quote);
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void ttyinq_unputchar(struct ttyinq *ti);
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void ttyinq_reprintpos_set(struct ttyinq *ti);
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void ttyinq_reprintpos_reset(struct ttyinq *ti);
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static __inline size_t
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ttyinq_getsize(struct ttyinq *ti)
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{
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return (ti->ti_nblocks * TTYINQ_DATASIZE);
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}
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static __inline size_t
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ttyinq_getallocatedsize(struct ttyinq *ti)
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{
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return (ti->ti_quota * TTYINQ_DATASIZE);
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}
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static __inline size_t
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ttyinq_bytesleft(struct ttyinq *ti)
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{
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size_t len;
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/* Make sure the usage never exceeds the length. */
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len = ti->ti_nblocks * TTYINQ_DATASIZE;
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MPASS(len >= ti->ti_end);
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return (len - ti->ti_end);
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}
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static __inline size_t
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ttyinq_bytescanonicalized(struct ttyinq *ti)
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{
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MPASS(ti->ti_begin <= ti->ti_linestart);
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return (ti->ti_linestart - ti->ti_begin);
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}
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static __inline size_t
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ttyinq_bytesline(struct ttyinq *ti)
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{
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MPASS(ti->ti_linestart <= ti->ti_end);
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return (ti->ti_end - ti->ti_linestart);
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}
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/* Input buffer iteration. */
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typedef void ttyinq_line_iterator_t(void *data, char c, int flags);
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void ttyinq_line_iterate_from_linestart(struct ttyinq *ti,
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ttyinq_line_iterator_t *iterator, void *data);
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void ttyinq_line_iterate_from_reprintpos(struct ttyinq *ti,
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ttyinq_line_iterator_t *iterator, void *data);
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/* Output queue handling routines. */
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void ttyoutq_flush(struct ttyoutq *to);
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int ttyoutq_setsize(struct ttyoutq *to, struct tty *tp, size_t len);
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void ttyoutq_free(struct ttyoutq *to);
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size_t ttyoutq_read(struct ttyoutq *to, void *buf, size_t len);
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int ttyoutq_read_uio(struct ttyoutq *to, struct tty *tp, struct uio *uio);
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size_t ttyoutq_write(struct ttyoutq *to, const void *buf, size_t len);
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int ttyoutq_write_nofrag(struct ttyoutq *to, const void *buf, size_t len);
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static __inline size_t
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ttyoutq_getsize(struct ttyoutq *to)
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{
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return (to->to_nblocks * TTYOUTQ_DATASIZE);
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}
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static __inline size_t
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ttyoutq_getallocatedsize(struct ttyoutq *to)
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{
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return (to->to_quota * TTYOUTQ_DATASIZE);
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}
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static __inline size_t
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ttyoutq_bytesleft(struct ttyoutq *to)
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{
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size_t len;
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/* Make sure the usage never exceeds the length. */
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len = to->to_nblocks * TTYOUTQ_DATASIZE;
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MPASS(len >= to->to_end);
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return (len - to->to_end);
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}
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static __inline size_t
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ttyoutq_bytesused(struct ttyoutq *to)
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{
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return (to->to_end - to->to_begin);
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}
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#endif /* _KERNEL */
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#endif /* !_SYS_TTYQUEUE_H_ */
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