Last change
on this file since 337 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
set to
text/x-csrc;charset=UTF-8
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File size:
734 bytes
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Rev | Line | |
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[337] | 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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