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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).
+ *
+ * Most of the prototypes of these functions are borrowed from
+ * FreeBSD, but their implementation (in klibc.c) come either from Kos
+ * (GPL v2) or from David Decotigny (SOS).
+ */
+
+#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)));
+
+
+/*
+ * Pseudo-random generation functions. Useful to do some coverage
+ * tests.
+ */
+
+/* Amplitude of the random number generation */
+#define RAND_MAX 4294967291U
+
+/* Pseudo-random number generation (MT unsafe) */
+unsigned long int random (void);
+
+/* Set random seed (MT unsafe) */
+void srandom (unsigned long int seed);
+
+#endif /* _SOS_KLIBC_H_ */