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29 lines
699 B
C
29 lines
699 B
C
/* memmove.c -- copy memory.
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Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate.
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In the public domain.
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By David MacKenzie <djm@gnu.ai.mit.edu>. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stddef.h>
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void *
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memmove (void *dest0, void const *source0, size_t length)
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{
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char *dest = dest0;
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char const *source = source0;
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if (source < dest)
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/* Moving from low mem to hi mem; start at end. */
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for (source += length, dest += length; length; --length)
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*--dest = *--source;
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else if (source != dest)
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{
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/* Moving from hi mem to low mem; start at beginning. */
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for (; length; --length)
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*dest++ = *source++;
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}
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return dest0;
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}
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