31 lines
670 B
C
31 lines
670 B
C
/* bcopy -- copy memory regions of arbitary length
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@deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length})
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Copies @var{length} bytes from memory region @var{in} to region
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@var{out}. The use of @code{bcopy} is deprecated in new programs.
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@end deftypefn
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*/
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#include <stddef.h>
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void
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bcopy (const void *src, void *dest, size_t len)
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{
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if (dest < src)
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{
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const char *firsts = src;
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char *firstd = dest;
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while (len--)
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*firstd++ = *firsts++;
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}
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else
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{
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const char *lasts = (const char *)src + (len-1);
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char *lastd = (char *)dest + (len-1);
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while (len--)
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*lastd-- = *lasts--;
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}
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}
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