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author | Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com> | 2019-02-01 22:55:37 +0000 |
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committer | Kiyoshi Aman <kiyoshi.aman+adelie@gmail.com> | 2019-02-03 18:22:05 -0600 |
commit | 5b57d28ffb6e1ef86b50f7d05d977826eae89bfe (patch) | |
tree | 154a22fe556b49e6927197336f8bf91b12eacd5e /usr.bin/grep/queue.c | |
download | userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.gz userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.bz2 userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.tar.xz userland-5b57d28ffb6e1ef86b50f7d05d977826eae89bfe.zip |
initial population
Diffstat (limited to 'usr.bin/grep/queue.c')
-rw-r--r-- | usr.bin/grep/queue.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/usr.bin/grep/queue.c b/usr.bin/grep/queue.c new file mode 100644 index 0000000..e3c6be1 --- /dev/null +++ b/usr.bin/grep/queue.c @@ -0,0 +1,116 @@ +/* $NetBSD: queue.c,v 1.5 2011/08/31 16:24:57 plunky Exp $ */ +/* $FreeBSD: head/usr.bin/grep/queue.c 211496 2010-08-19 09:28:59Z des $ */ +/*- + * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * A really poor man's queue. It does only what it has to and gets out of + * Dodge. It is used in place of <sys/queue.h> to get a better performance. + */ + +#if HAVE_NBTOOL_CONFIG_H +#include "nbtool_config.h" +#endif + +#include <sys/cdefs.h> +__RCSID("$NetBSD: queue.c,v 1.5 2011/08/31 16:24:57 plunky Exp $"); + +#include <sys/param.h> +#include <sys/queue.h> + +#include <stdlib.h> +#include <string.h> + +#include "grep.h" + +struct qentry { + STAILQ_ENTRY(qentry) list; + struct str data; +}; + +static STAILQ_HEAD(, qentry) queue = STAILQ_HEAD_INITIALIZER(queue); +static unsigned long long count; + +static struct qentry *dequeue(void); + +void +enqueue(struct str *x) +{ + struct qentry *item; + + item = grep_malloc(sizeof(struct qentry)); + item->data.dat = grep_malloc(sizeof(char) * x->len); + item->data.len = x->len; + item->data.line_no = x->line_no; + item->data.off = x->off; + memcpy(item->data.dat, x->dat, x->len); + item->data.file = x->file; + + STAILQ_INSERT_TAIL(&queue, item, list); + + if (++count > Bflag) { + item = dequeue(); + free(item->data.dat); + free(item); + } +} + +static struct qentry * +dequeue(void) +{ + struct qentry *item; + + item = STAILQ_FIRST(&queue); + if (item == NULL) + return (NULL); + + STAILQ_REMOVE_HEAD(&queue, list); + --count; + return (item); +} + +void +printqueue(void) +{ + struct qentry *item; + + while ((item = dequeue()) != NULL) { + printline(&item->data, '-', NULL, 0); + free(item->data.dat); + free(item); + } +} + +void +clearqueue(void) +{ + struct qentry *item; + + while ((item = dequeue()) != NULL) { + free(item->data.dat); + free(item); + } +} |