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38 lines
876 B
C
38 lines
876 B
C
/***********************************************************
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Copyright (c) 2000, BeOpen.com.
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Copyright (c) 1995-2000, Corporation for National Research Initiatives.
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Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
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All rights reserved.
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See the file "Misc/COPYRIGHT" for information on usage and
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redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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******************************************************************/
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/* A perhaps slow but I hope correct implementation of memmove */
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extern char *memcpy();
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char *
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memmove(dst, src, n)
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char *dst;
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char *src;
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int n;
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{
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char *realdst = dst;
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if (n <= 0)
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return dst;
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if (src >= dst+n || dst >= src+n)
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return memcpy(dst, src, n);
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if (src > dst) {
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while (--n >= 0)
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*dst++ = *src++;
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}
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else if (src < dst) {
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src += n;
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dst += n;
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while (--n >= 0)
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*--dst = *--src;
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}
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return realdst;
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}
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