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#include <unistd.h>
void swab(const void *restrict _src, void *restrict _dest, ssize_t n)
{
const char *src = _src;
char *dest = _dest;
for (; n>0; n-=2) {
dest[0] = src[1];
dest[1] = src[0];
dest += 2;
src += 2;
}
}
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