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594318fd3d
this commit introduces a performance regression in many uses of memmove, which will need to be addressed before the next release. i'm making it as a temporary measure so that the restrict patch can be committed without invoking undefined behavior when memmove calls memcpy with overlapping regions.
14 lines
236 B
C
14 lines
236 B
C
#include <string.h>
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void *memmove(void *dest, const void *src, size_t n)
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{
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char *d = dest;
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const char *s = src;
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if (d==s) return d;
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if ((size_t)(d-s) < n)
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while (n--) d[n] = s[n];
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else
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while (n--) *d++ = *s++;
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return dest;
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}
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