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
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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:
632 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 | #include "libc.h"
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5 |
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6 | #define ALIGN (sizeof(size_t))
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7 | #define ONES ((size_t)-1/UCHAR_MAX)
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8 | #define HIGHS (ONES * (UCHAR_MAX/2+1))
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9 | #define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
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10 |
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11 | char *__stpcpy(char *restrict d, const char *restrict s)
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12 | {
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13 | size_t *wd;
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14 | const size_t *ws;
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15 |
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16 | if ((uintptr_t)s % ALIGN == (uintptr_t)d % ALIGN) {
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17 | for (; (uintptr_t)s % ALIGN; s++, d++)
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18 | if (!(*d=*s)) return d;
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19 | wd=(void *)d; ws=(const void *)s;
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20 | for (; !HASZERO(*ws); *wd++ = *ws++);
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21 | d=(void *)wd; s=(const void *)ws;
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22 | }
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23 | for (; (*d=*s); s++, d++);
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24 |
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25 | return d;
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26 | }
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27 |
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28 | weak_alias(__stpcpy, stpcpy);
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