libjeffpc: buffer_heap.c annotate

annotate buffer_heap.c @ 261:6795f8427fed

buffer: allow buffer truncation This is a similar idea to the POSIX truncate() function. It sets the used buffer size to a certain value. If the new size is larger than the old size, the newly visible bytes are zeroed out. If the new size is smaller than the old size, the bytes at the end are "lost" but the underlying buffer allocation remains unchanged. Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>

author	Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date	Tue, 11 Jul 2017 00:39:14 +0300
parents	f82b45b662c9
children	0fa2f6606c5e

rev	line source
256 f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	1 /*
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	2 * Copyright (c) 2017 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	3 *
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	4 * Permission is hereby granted, free of charge, to any person obtaining a copy
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	5 * of this software and associated documentation files (the "Software"), to deal
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	6 * in the Software without restriction, including without limitation the rights
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	8 * copies of the Software, and to permit persons to whom the Software is
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	9 * furnished to do so, subject to the following conditions:
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	10 *
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	11 * The above copyright notice and this permission notice shall be included in
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	12 * all copies or substantial portions of the Software.
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	13 *
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	20 * SOFTWARE.
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	21 */
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	22
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	23 #include "buffer_impl.h"
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	24
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	25 const struct buffer_ops heap_buffer = {
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	26 .realloc = realloc,
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	27 .free = free,
261 6795f8427fed buffer: allow buffer truncation Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: 256 diff changeset	28 .clear = generic_buffer_clear_memset,
256 f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	29 .copyin = generic_buffer_copyin_memcpy,
f82b45b662c9 buffer: use an ops vector to customize buffer behavior Josef 'Jeff' Sipek <jeffpc@josefsipek.net> parents: diff changeset	30 };

Mercurial > libjeffpc

annotate buffer_heap.c @ 261:6795f8427fed