Ruby
3.1.3p185 (2022-11-24 revision 1a6b16756e0ba6b95ab71a441357ed5484e33498)
missing
memmove.c
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/* public domain rewrite of memcmp(3) */
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#include "ruby/missing.h"
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#include <stddef.h>
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void
*
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memmove(
void
*d,
const
void
*s,
size_t
n)
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{
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char
*dst = (
char
*)d;
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const
char
*src = (
const
char
*)s;
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if
(src < dst) {
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src += n;
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dst += n;
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for
(; n; --n)
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*--dst = *--src;
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}
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else
if
(dst < src)
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for
(; n; --n)
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*dst++ = *src++;
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return
d;
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}
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