fusl/src/string/strlen.c - Issue 1573973002: Add a "fork" of musl as //fusl.

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Side by Side Diff: fusl/src/string/strlen.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 4 years, 11 months ago

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	1 #include <string.h>

	2 #include <stdint.h>

	3 #include <limits.h>

	4

	5 #define ALIGN (sizeof(size_t))

	6 #define ONES ((size_t)-1/UCHAR_MAX)

	7 #define HIGHS (ONES * (UCHAR_MAX/2+1))

	8 #define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)

	9

	10 size_t strlen(const char *s)

	11 {

	12 const char *a = s;

	13 const size_t *w;

	14 for (; (uintptr_t)s % ALIGN; s++) if (!*s) return s-a;

	15 for (w = (const void )s; !HASZERO(w); w++);

	16 for (s = (const void )w; s; s++);

	17 return s-a;

	18 }

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