3 <<strcpy>>---copy string
10 char *strcpy(char *<[dst]>, const char *<[src]>);
14 char *strcpy(<[dst]>, <[src]>)
19 <<strcpy>> copies the string pointed to by <[src]>
20 (including the terminating null character) to the array
21 pointed to by <[dst]>.
24 This function returns the initial value of <[dst]>.
29 <<strcpy>> requires no supporting OS subroutines.
42 /* Nonzero if either X or Y is not aligned on a "long" boundary. */
43 #define UNALIGNED(X, Y) \
44 (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
46 #if LONG_MAX == 2147483647L
47 #define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
49 #if LONG_MAX == 9223372036854775807L
50 /* Nonzero if X (a long int) contains a NULL byte. */
51 #define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
53 #error long int is not a 32bit or 64bit type.
58 #error long int is not a 32bit or 64bit byte
62 _DEFUN (strcpy, (dst0, src0),
66 #if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
69 while (*dst0++ = *src0++)
75 _CONST char *src = src0;
77 _CONST long *aligned_src;
79 /* If SRC or DEST is unaligned, then copy bytes. */
80 if (!UNALIGNED (src, dst))
82 aligned_dst = (long*)dst;
83 aligned_src = (long*)src;
85 /* SRC and DEST are both "long int" aligned, try to do "long int"
87 while (!DETECTNULL(*aligned_src))
89 *aligned_dst++ = *aligned_src++;
92 dst = (char*)aligned_dst;
93 src = (char*)aligned_src;
96 while ((*dst++ = *src++))
99 #endif /* not PREFER_SIZE_OVER_SPEED */