1*c9945492SAndroid Build Coastguard Worker #include <string.h> 2*c9945492SAndroid Build Coastguard Worker #include <stdint.h> 3*c9945492SAndroid Build Coastguard Worker #include <limits.h> 4*c9945492SAndroid Build Coastguard Worker 5*c9945492SAndroid Build Coastguard Worker #define ALIGN (sizeof(size_t)) 6*c9945492SAndroid Build Coastguard Worker #define ONES ((size_t)-1/UCHAR_MAX) 7*c9945492SAndroid Build Coastguard Worker #define HIGHS (ONES * (UCHAR_MAX/2+1)) 8*c9945492SAndroid Build Coastguard Worker #define HASZERO(x) ((x)-ONES & ~(x) & HIGHS) 9*c9945492SAndroid Build Coastguard Worker __stpcpy(char * restrict d,const char * restrict s)10*c9945492SAndroid Build Coastguard Workerchar *__stpcpy(char *restrict d, const char *restrict s) 11*c9945492SAndroid Build Coastguard Worker { 12*c9945492SAndroid Build Coastguard Worker #ifdef __GNUC__ 13*c9945492SAndroid Build Coastguard Worker typedef size_t __attribute__((__may_alias__)) word; 14*c9945492SAndroid Build Coastguard Worker word *wd; 15*c9945492SAndroid Build Coastguard Worker const word *ws; 16*c9945492SAndroid Build Coastguard Worker if ((uintptr_t)s % ALIGN == (uintptr_t)d % ALIGN) { 17*c9945492SAndroid Build Coastguard Worker for (; (uintptr_t)s % ALIGN; s++, d++) 18*c9945492SAndroid Build Coastguard Worker if (!(*d=*s)) return d; 19*c9945492SAndroid Build Coastguard Worker wd=(void *)d; ws=(const void *)s; 20*c9945492SAndroid Build Coastguard Worker for (; !HASZERO(*ws); *wd++ = *ws++); 21*c9945492SAndroid Build Coastguard Worker d=(void *)wd; s=(const void *)ws; 22*c9945492SAndroid Build Coastguard Worker } 23*c9945492SAndroid Build Coastguard Worker #endif 24*c9945492SAndroid Build Coastguard Worker for (; (*d=*s); s++, d++); 25*c9945492SAndroid Build Coastguard Worker 26*c9945492SAndroid Build Coastguard Worker return d; 27*c9945492SAndroid Build Coastguard Worker } 28*c9945492SAndroid Build Coastguard Worker 29*c9945492SAndroid Build Coastguard Worker weak_alias(__stpcpy, stpcpy); 30