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@@ -66,6 +66,10 @@ extern __ptr_t memmove __P ((__ptr_t __dest, __const __ptr_t __src,
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#define index strchr
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#define rindex strrchr
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+/* Return the position of the first bit set in I, or 0 if none are set.
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+ The least-significant bit is position 1, the most-significant 32. */
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+extern int ffs __P ((int __i)) __attribute__ ((const));
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+
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/* Other common BSD functions */
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/* Set N bytes of S to 0. */
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extern void bzero __P ((__ptr_t __s, size_t __n));
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