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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1693 | serge | 1 | /* |
| 2 | FUNCTION |
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| 3 | < |
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| 4 | |||
| 5 | INDEX |
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| 6 | strcpy |
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| 7 | |||
| 8 | ANSI_SYNOPSIS |
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| 9 | #include |
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| 10 | char *strcpy(char *<[dst]>, const char *<[src]>); |
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| 11 | |||
| 12 | TRAD_SYNOPSIS |
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| 13 | #include |
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| 14 | char *strcpy(<[dst]>, <[src]>) |
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| 15 | char *<[dst]>; |
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| 16 | char *<[src]>; |
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| 17 | |||
| 18 | DESCRIPTION |
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| 19 | < |
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| 20 | (including the terminating null character) to the array |
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| 21 | pointed to by <[dst]>. |
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| 22 | |||
| 23 | RETURNS |
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| 24 | This function returns the initial value of <[dst]>. |
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| 25 | |||
| 26 | PORTABILITY |
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| 27 | < |
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| 28 | |||
| 29 | < |
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| 30 | |||
| 31 | QUICKREF |
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| 32 | strcpy ansi pure |
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| 33 | */ |
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| 34 | |||
| 35 | #include |
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| 36 | #include |
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| 37 | |||
| 38 | /*SUPPRESS 560*/ |
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| 39 | /*SUPPRESS 530*/ |
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| 40 | |||
| 41 | /* Nonzero if either X or Y is not aligned on a "long" boundary. */ |
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| 42 | #define UNALIGNED(X, Y) \ |
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| 43 | (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1))) |
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| 44 | |||
| 45 | #if LONG_MAX == 2147483647L |
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| 46 | #define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080) |
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| 47 | #else |
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| 48 | #if LONG_MAX == 9223372036854775807L |
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| 49 | /* Nonzero if X (a long int) contains a NULL byte. */ |
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| 50 | #define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080) |
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| 51 | #else |
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| 52 | #error long int is not a 32bit or 64bit type. |
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| 53 | #endif |
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| 54 | #endif |
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| 55 | |||
| 56 | #ifndef DETECTNULL |
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| 57 | #error long int is not a 32bit or 64bit byte |
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| 58 | #endif |
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| 59 | |||
| 60 | char* |
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| 61 | _DEFUN (strcpy, (dst0, src0), |
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| 62 | char *dst0 _AND |
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| 63 | _CONST char *src0) |
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| 64 | { |
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| 65 | #if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) |
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| 66 | char *s = dst0; |
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| 67 | |||
| 68 | while (*dst0++ = *src0++) |
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| 69 | ; |
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| 70 | |||
| 71 | return s; |
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| 72 | #else |
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| 73 | char *dst = dst0; |
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| 74 | _CONST char *src = src0; |
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| 75 | long *aligned_dst; |
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| 76 | _CONST long *aligned_src; |
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| 77 | |||
| 78 | /* If SRC or DEST is unaligned, then copy bytes. */ |
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| 79 | if (!UNALIGNED (src, dst)) |
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| 80 | { |
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| 81 | aligned_dst = (long*)dst; |
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| 82 | aligned_src = (long*)src; |
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| 83 | |||
| 84 | /* SRC and DEST are both "long int" aligned, try to do "long int" |
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| 85 | sized copies. */ |
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| 86 | while (!DETECTNULL(*aligned_src)) |
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| 87 | { |
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| 88 | *aligned_dst++ = *aligned_src++; |
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| 89 | } |
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| 90 | |||
| 91 | dst = (char*)aligned_dst; |
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| 92 | src = (char*)aligned_src; |
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| 93 | } |
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| 94 | |||
| 95 | while ((*dst++ = *src++)) |
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| 96 | ; |
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| 97 | return dst0; |
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| 98 | #endif /* not PREFER_SIZE_OVER_SPEED */ |
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| 99 | } |