Last change
on this file since 445 was 444, checked in by coas-nagasima, 4 years ago |
muslのソースコードを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
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text/x-csrc;charset=UTF-8
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File size:
437 bytes
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1 | #include <string.h>
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2 | #include <stdint.h>
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3 | #include <limits.h>
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4 |
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5 | #define ALIGN (sizeof(size_t))
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6 | #define ONES ((size_t)-1/UCHAR_MAX)
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7 | #define HIGHS (ONES * (UCHAR_MAX/2+1))
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8 | #define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
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9 |
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10 | size_t strlen(const char *s)
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11 | {
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12 | const char *a = s;
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13 | const size_t *w;
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14 | for (; (uintptr_t)s % ALIGN; s++) if (!*s) return s-a;
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15 | for (w = (const void *)s; !HASZERO(*w); w++);
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16 | for (s = (const void *)w; *s; s++);
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17 | return s-a;
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18 | }
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