Last change
on this file since 351 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNL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:
734 bytes
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1 | #include <string.h>
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2 | #include <stdint.h>
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3 |
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4 | #define WT size_t
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5 | #define WS (sizeof(WT))
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6 |
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7 | void *memmove(void *dest, const void *src, size_t n)
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8 | {
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9 | char *d = dest;
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10 | const char *s = src;
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11 |
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12 | if (d==s) return d;
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13 | if (s+n <= d || d+n <= s) return memcpy(d, s, n);
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14 |
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15 | if (d<s) {
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16 | if ((uintptr_t)s % WS == (uintptr_t)d % WS) {
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17 | while ((uintptr_t)d % WS) {
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18 | if (!n--) return dest;
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19 | *d++ = *s++;
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20 | }
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21 | for (; n>=WS; n-=WS, d+=WS, s+=WS) *(WT *)d = *(WT *)s;
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22 | }
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23 | for (; n; n--) *d++ = *s++;
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24 | } else {
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25 | if ((uintptr_t)s % WS == (uintptr_t)d % WS) {
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26 | while ((uintptr_t)(d+n) % WS) {
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27 | if (!n--) return dest;
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28 | d[n] = s[n];
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29 | }
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30 | while (n>=WS) n-=WS, *(WT *)(d+n) = *(WT *)(s+n);
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31 | }
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32 | while (n) n--, d[n] = s[n];
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33 | }
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34 |
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35 | return dest;
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36 | }
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