aboutsummaryrefslogtreecommitdiff
path: root/string/string.h
diff options
context:
space:
mode:
Diffstat (limited to 'string/string.h')
-rw-r--r--string/string.h44
1 files changed, 30 insertions, 14 deletions
diff --git a/string/string.h b/string/string.h
index 3cac382..560638b 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