Mercurial > libbuf
view buf-erase.c @ 0:b1991ee4451d
misc: initial import
author | David Demelier <markand@malikania.fr> |
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date | Thu, 29 Oct 2020 17:24:30 +0100 |
parents | |
children | d87e84936795 |
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/* * buf-erase.c -- simple string buffer for C * * Copyright (c) 2019-2020 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or 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. */ #include <assert.h> #include <string.h> #include "buf.h" void buf_erase(struct buf *b, size_t pos, size_t count) { assert(b); assert(pos <= b->length); if (count > b->length - pos) { /* Optimize whole erase at pos. */ b->data[pos] = 0; b->length = pos; } else { memmove(&b->data[pos], &b->data[pos + count], b->length - count); b->length -= count; } }