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Diffstat (limited to 'newlib/libc/string/stpncpy.c')
-rw-r--r-- | newlib/libc/string/stpncpy.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/newlib/libc/string/stpncpy.c b/newlib/libc/string/stpncpy.c deleted file mode 100644 index fca10d398..000000000 --- a/newlib/libc/string/stpncpy.c +++ /dev/null @@ -1,114 +0,0 @@ -/* -FUNCTION - <<stpncpy>>---counted copy string returning a pointer to its end - -INDEX - stpncpy - -ANSI_SYNOPSIS - #include <string.h> - char *stpncpy(char *<[dst]>, const char *<[src]>, size_t <[length]>); - -TRAD_SYNOPSIS - #include <string.h> - char *stpncpy(<[dst]>, <[src]>, <[length]>) - char *<[dst]>; - char *<[src]>; - size_t <[length]>; - -DESCRIPTION - <<stpncpy>> copies not more than <[length]> characters from the - the string pointed to by <[src]> (including the terminating - null character) to the array pointed to by <[dst]>. If the - string pointed to by <[src]> is shorter than <[length]> - characters, null characters are appended to the destination - array until a total of <[length]> characters have been - written. - -RETURNS - This function returns a pointer to the end of the destination string, - thus pointing to the trailing '\0', or, if the destination string is - not null-terminated, pointing to dst + n. - -PORTABILITY -<<stpncpy>> is a GNU extension, candidate for inclusion into POSIX/SUSv4. - -<<stpncpy>> requires no supporting OS subroutines. - -QUICKREF - stpncpy gnu -*/ - -#include <string.h> -#include <limits.h> - -/*SUPPRESS 560*/ -/*SUPPRESS 530*/ - -/* Nonzero if either X or Y is not aligned on a "long" boundary. */ -#define UNALIGNED(X, Y) \ - (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1))) - -#if LONG_MAX == 2147483647L -#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080) -#else -#if LONG_MAX == 9223372036854775807L -/* Nonzero if X (a long int) contains a NULL byte. */ -#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080) -#else -#error long int is not a 32bit or 64bit type. -#endif -#endif - -#ifndef DETECTNULL -#error long int is not a 32bit or 64bit byte -#endif - -#define TOO_SMALL(LEN) ((LEN) < sizeof (long)) - -char * -_DEFUN (stpncpy, (dst, src), - char *dst _AND - _CONST char *src _AND - size_t count) -{ - char *ret = NULL; - -#if !defined(PREFER_SIZE_OVER_SPEED) && !defined(__OPTIMIZE_SIZE__) - long *aligned_dst; - _CONST long *aligned_src; - - /* If SRC and DEST is aligned and count large enough, then copy words. */ - if (!UNALIGNED (src, dst) && !TOO_SMALL (count)) - { - aligned_dst = (long*)dst; - aligned_src = (long*)src; - - /* SRC and DEST are both "long int" aligned, try to do "long int" - sized copies. */ - while (count >= sizeof (long int) && !DETECTNULL(*aligned_src)) - { - count -= sizeof (long int); - *aligned_dst++ = *aligned_src++; - } - - dst = (char*)aligned_dst; - src = (char*)aligned_src; - } -#endif /* not PREFER_SIZE_OVER_SPEED */ - - while (count > 0) - { - --count; - if ((*dst++ = *src++) == '\0') - { - ret = dst - 1; - break; - } - } - - while (count-- > 0) - *dst++ = '\0'; - - return ret ? ret : dst; -} |