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annotate druntime/src/compiler/ldc/arraycat.d @ 1458:e0b2d67cfe7c

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Added druntime (this should be removed once it works).
author Robert Clipsham <robert@octarineparrot.com>
date Tue, 02 Jun 2009 17:43:06 +0100
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1458
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1 /**
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2 * Implementation of array copy support routines.
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3 *
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4 * Copyright: Copyright Digital Mars 2004 - 2009.
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5 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
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6 * Authors: Walter Bright, Sean Kelly
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7 *
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8 * Copyright Digital Mars 2004 - 2009.
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9 * Distributed under the Boost Software License, Version 1.0.
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10 * (See accompanying file LICENSE_1_0.txt or copy at
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11 * http://www.boost.org/LICENSE_1_0.txt)
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12 */
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13 module rt.arraycat;
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14
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15 private
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16 {
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17 import core.stdc.string;
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18 debug import core.stdc.stdio;
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19 }
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20
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21 extern (C):
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22
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23 byte[] _d_arraycopy(size_t size, byte[] from, byte[] to)
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24 {
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25 debug printf("f = %p,%d, t = %p,%d, size = %d\n",
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26 from.ptr, from.length, to.ptr, to.length, size);
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27
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28 if (to.length != from.length)
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29 {
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30 throw new Exception("lengths don't match for array copy");
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31 }
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32 else if (to.ptr + to.length * size <= from.ptr ||
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33 from.ptr + from.length * size <= to.ptr)
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34 {
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35 memcpy(to.ptr, from.ptr, to.length * size);
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36 }
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37 else
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38 {
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39 throw new Exception("overlapping array copy");
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40 }
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41 return to;
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42 }