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/* Copyright (C) 2003 The KOS Team
Copyright (C) 1999 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.
*/
#ifndef _SOS_KLIBC_H_
#define _SOS_KLIBC_H_
/**
* @file klibc.h
*
* Basic libc-style support for common useful functions (string.h,
* stdarg.h), some with slight non-standard behavior (see comments).
*/
#include <sos/types.h>
/* string.h functions */
void *memcpy(void *dst, const void *src, register unsigned int size ) ;
void *memset(void *dst, register int c, register unsigned int length ) ;
int memcmp(const void *s1, const void *s2, sos_size_t n);
unsigned int strlen( register const char *str) ;
unsigned int strnlen(const char * s, sos_size_t maxlen);
/**
* @note Same as strncpy(), with a slightly different semantic.
* Actually, strncpy(3C) says " The result will not be null-terminated
* if the length of 'from' is n or more.". Here, 'dst' is ALWAYS
* null-terminated. And its total len will ALWAYS be <= len, with
* null-terminating-char included.
*/
char *strzcpy( register char *dst, register const char *src,
register int len ) ;
/**
* @note Same as strncat(), with the same semantic : 'dst' is ALWAYS
* null-terminated. And its total len will ALWAYS be <= len, with
* null-terminating-char included.
*/
char *strzcat (char *dest, const char *src,
const sos_size_t len);
int strcmp(register const char *s1, register const char *s2 );
int strncmp(register const char *s1, register const char *s2,
register int len );
/* Basic stdarg.h macros. Taken from gcc support files */
#define __GNUC_VA_LIST
typedef void *__gnuc_va_list;
typedef __gnuc_va_list va_list;
#define __va_rounded_size(TYPE) \
(((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
#define va_start(AP, LASTARG) \
(AP = ((__gnuc_va_list) __builtin_next_arg (LASTARG)))
#define va_end(AP) \
((void)0)
#define va_arg(AP, TYPE) \
(AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)), \
*((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
#define __va_copy(dest, src) \
(dest) = (src)
/* stdarg.h functions. There might be a non-standard behavior: there
will always be a trailing '\0' in the resulting string */
int vsnprintf(char *, sos_size_t, const char *, va_list);
int snprintf(char *, sos_size_t, const char *, /*args*/ ...)
__attribute__ ((format (printf, 3, 4)));
#endif /* _SOS_KLIBC_H_ */