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 #ifndef NIR_VLA_H 29 #define NIR_VLA_H 30 31 #include "c99_alloca.h" 32 33 /* Declare a variable length array, with no initialization */ 34 #define NIR_VLA(_type, _name, _length) \ 35 _type *_name = alloca((_length) * sizeof *_name) 36 37 /* Declare a variable length array, and initialize it with the given byte. 38 * 39 * _length is evaluated twice, so expressions with side-effects must be 40 * avoided. 41 */ 42 #define NIR_VLA_FILL(_type, _name, _length, _byte) \ 43 _type *_name = memset(alloca((_length) * sizeof *_name), _byte, (_length) * sizeof *_name) 44 45 /* Declare a variable length array, and zero it. 46 * 47 * Just like NIR_VLA_FILL, _length is evaluated twice, so expressions with 48 * side-effects must be avoided. 49 */ 50 #define NIR_VLA_ZERO(_type, _name, _length) \ 51 NIR_VLA_FILL(_type, _name, _length, 0) 52 53 #endif /* NIR_VLA_H */ 54