1 /************************************************************************** 2 * 3 * Copyright 2015 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #pragma once 29 30 31 #include "c99_alloca.h" 32 33 34 /* Declare a variable length array, with no initialization */ 35 #define NIR_VLA(_type, _name, _length) \ 36 _type *_name = alloca((_length) * sizeof *_name) 37 38 39 /* Declare a variable length array, and initialize it with the given byte. 40 * 41 * _length is evaluated twice, so expressions with side-effects must be 42 * avoided. 43 */ 44 #define NIR_VLA_FILL(_type, _name, _length, _byte) \ 45 _type *_name = memset(alloca((_length) * sizeof *_name), _byte, (_length) * sizeof *_name) 46 47 48 /* Declare a variable length array, and zero it. 49 * 50 * Just like NIR_VLA_FILL, _length is evaluated twice, so expressions with 51 * side-effects must be avoided. 52 */ 53 #define NIR_VLA_ZERO(_type, _name, _length) \ 54 NIR_VLA_FILL(_type, _name, _length, 0) 55
