diff options
Diffstat (limited to 'newlib/libc/string/strcat.c')
-rw-r--r-- | newlib/libc/string/strcat.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/newlib/libc/string/strcat.c b/newlib/libc/string/strcat.c deleted file mode 100644 index 411eadb..0000000 --- a/newlib/libc/string/strcat.c +++ /dev/null @@ -1,104 +0,0 @@ -/* -FUNCTION - <<strcat>>---concatenate strings - -INDEX - strcat - -ANSI_SYNOPSIS - #include <string.h> - char *strcat(char *<[dst]>, const char *<[src]>); - -TRAD_SYNOPSIS - #include <string.h> - char *strcat(<[dst]>, <[src]>) - char *<[dst]>; - char *<[src]>; - -DESCRIPTION - <<strcat>> appends a copy of the string pointed to by <[src]> - (including the terminating null character) to the end of the - string pointed to by <[dst]>. The initial character of - <[src]> overwrites the null character at the end of <[dst]>. - -RETURNS - This function returns the initial value of <[dst]> - -PORTABILITY -<<strcat>> is ANSI C. - -<<strcat>> requires no supporting OS subroutines. - -QUICKREF - strcat ansi pure -*/ - -#include <string.h> -#include <limits.h> - -/* Nonzero if X is aligned on a "long" boundary. */ -#define ALIGNED(X) \ - (((long)X & (sizeof (long) - 1)) == 0) - -#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 - - -/*SUPPRESS 560*/ -/*SUPPRESS 530*/ - -char * -_DEFUN (strcat, (s1, s2), - char *s1 _AND - _CONST char *s2) -{ -#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) - char *s = s1; - - while (*s1) - s1++; - - while (*s1++ = *s2++) - ; - return s; -#else - char *s = s1; - - - /* Skip over the data in s1 as quickly as possible. */ - if (ALIGNED (s1)) - { - unsigned long *aligned_s1 = (unsigned long *)s1; - while (!DETECTNULL (*aligned_s1)) - aligned_s1++; - - s1 = (char *)aligned_s1; - } - - while (*s1) - s1++; - - /* s1 now points to the its trailing null character, we can - just use strcpy to do the work for us now. - - ?!? We might want to just include strcpy here. - Also, this will cause many more unaligned string copies because - s1 is much less likely to be aligned. I don't know if its worth - tweaking strcpy to handle this better. */ - strcpy (s1, s2); - - return s; -#endif /* not PREFER_SIZE_OVER_SPEED */ -} |