diff options
Diffstat (limited to 'string/string.h')
| -rw-r--r-- | string/string.h | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/string/string.h b/string/string.h index 3cac382529..560638be8e 100644 --- a/string/string.h +++ b/string/string.h @@ -171,6 +171,13 @@ extern char *strtok_r __P ((char *__s, __const char *__delim, HAYSTACK is HAYSTACKLEN bytes long. */ extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen, __const __ptr_t __needle, size_t __needlelen)); + +/* Copy N bytes of SRC to DEST, return pointer to bytes after the + last written byte. */ +extern __ptr_t __mempcpy __P ((__ptr_t __restrict __dest, + __const __ptr_t __restrict __src, size_t __n)); +extern __ptr_t mempcpy __P ((__ptr_t __restrict __dest, + __const __ptr_t __restrict __src, size_t __n)); #endif @@ -274,21 +281,30 @@ extern char *basename __P ((__const char *__filename)); #endif -/* Some functions might be implemented as optimized inline assembler - functions. Only include this file if we really want them. */ -#if defined __USE_STRING_INLINES && defined __OPTIMIZE__ -# include <bits/string.h> -#endif - - -/* Now provide some generic optimizations. */ #if defined __GNUC__ && __GNUC__ >= 2 && defined __OPTIMIZE__ -extern __inline size_t -strnlen (__const char *__string, size_t __maxlen) -{ - __const char *__end = (__const char *) memchr (__string, '\0', __maxlen); - return __end ? __end - __string : __maxlen; -} +/* When using GNU CC we provide some optimized versions of selected + functions from this header. There are two kinds of optimizations: + + - machine-dependent optmizations, most probably using inline + assembler code; these could be quite expensive since the code + size could increase significantly. + These optimizations are not used unless the symbol + __USE_STRING_INLINES + is defined before including this header + + - machine-independent optimizations which do not increase the + code size significantly and which optimize mainly situations + where one or more arguments are compile-time constants. + These optimizations are used always when the compiler is + taught to optimized. */ + +/* Get the machine-dependent optimizations if wanted. */ +# ifdef __USE_STRING_INLINES +# include <bits/string.h> +# endif + +/* These are generic optimizations which do not add too much inline code. */ +# include <bits/string2.h> #endif __END_DECLS |