serval-dna/nacl/nacl-20110221/curvecp/byte_copy.c

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#include "byte.h"
void byte_copy(void *yv,long long ylen,const void *xv)
{
char *y = yv;
const char *x = xv;
while (ylen > 0) { *y++ = *x++; --ylen; }
}