From 1691f2b164fb5ff1e32265d6df643fc8b33cf112 Mon Sep 17 00:00:00 2001 From: Constanza Heath Date: Thu, 20 Aug 2015 11:22:40 -0700 Subject: Initial commit --- lib/utils.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 lib/utils.c (limited to 'lib/utils.c') diff --git a/lib/utils.c b/lib/utils.c new file mode 100644 index 0000000..4ba0aa8 --- /dev/null +++ b/lib/utils.c @@ -0,0 +1,57 @@ + +/* + * Copyright (C) 2015 by Intel Corporation, All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - 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. + * + * - Neither the name of Intel Corporation nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. + * + * utils.c -- Platform-dependent run-time operations. + * + */ + +#include "utils.h" + +#include + +uint32_t copy (uint8_t *to, + uint32_t to_len, + const uint8_t *from, + uint32_t from_len) { + + if (from_len <= to_len) { + (void) memcpy (to, from, from_len); + return from_len; + } else { + return 0; + } +} + +void set (uint8_t *to, uint8_t val, uint32_t len) { + (void) memset (to, val, len); +} + +uint8_t double_byte (uint8_t a) { + return (a & 0x80) ? ((a << 1) ^ 0x1b) : (a << 1); +} -- cgit v1.2.3