17 lines
259 B
C
17 lines
259 B
C
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char *
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memcpy(s1, s2, n)
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register char *s1, *s2;
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register int n;
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{
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/* Copy a block of data. */
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char *ret = s1;
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if (s2 <= s1 && s2 + (n-1) >= s1) {
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s1 += n; s2 += n;
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while (n-- > 0) *--s1 = *--s2;
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}
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else while (n-- > 0) *s1++ = *s2++;
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return ret;
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}
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