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comparison druntime/src/compiler/dmd/arraycat.d @ 759:d3eb054172f9

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Added copy of druntime from DMD 2.020 modified for LDC.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 11 Nov 2008 01:52:37 +0100
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758:f04dde6e882c 759:d3eb054172f9
1 /**
2 * Part of the D programming language runtime library.
3 */
4
5 /*
6 * Copyright (C) 2004-2007 by Digital Mars, www.digitalmars.com
7 * Written by Walter Bright
8 *
9 * This software is provided 'as-is', without any express or implied
10 * warranty. In no event will the authors be held liable for any damages
11 * arising from the use of this software.
12 *
13 * Permission is granted to anyone to use this software for any purpose,
14 * including commercial applications, and to alter it and redistribute it
15 * freely, in both source and binary form, subject to the following
16 * restrictions:
17 *
18 * o The origin of this software must not be misrepresented; you must not
19 * claim that you wrote the original software. If you use this software
20 * in a product, an acknowledgment in the product documentation would be
21 * appreciated but is not required.
22 * o Altered source versions must be plainly marked as such, and must not
23 * be misrepresented as being the original software.
24 * o This notice may not be removed or altered from any source
25 * distribution.
26 */
27
28 /*
29 * Modified by Sean Kelly for use with the D Runtime Project
30 */
31
32 module rt.arraycat;
33
34 private
35 {
36 import stdc.string;
37 debug import stdc.stdio;
38 }
39
40 extern (C):
41
42 byte[] _d_arraycopy(size_t size, byte[] from, byte[] to)
43 {
44 debug printf("f = %p,%d, t = %p,%d, size = %d\n",
45 from.ptr, from.length, to.ptr, to.length, size);
46
47 if (to.length != from.length)
48 {
49 throw new Exception("lengths don't match for array copy");
50 }
51 else if (to.ptr + to.length * size <= from.ptr ||
52 from.ptr + from.length * size <= to.ptr)
53 {
54 memcpy(to.ptr, from.ptr, to.length * size);
55 }
56 else
57 {
58 throw new Exception("overlapping array copy");
59 }
60 return to;
61 }