#define putchar(__c) fputc(__c, stdout)

/**
   The function \c printf performs formatted output to stream
   \c stderr.  See \c vfprintf() for details.
*/
extern int	printf(const char *__fmt, ...);

/**
   Variant of \c printf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	printf_P(const char *__fmt, ...);

/**
   The function \c vprintf performs formatted output to stream
   \c stdout, taking a variable argument list as in vfprintf().

   See vfprintf() for details.
*/
extern int	vprintf(const char *__fmt, va_list __ap);

/**
   Variant of \c printf() that sends the formatted characters
   to string \c s.
*/
extern int	sprintf(char *__s, const char *__fmt, ...);

/**
   Variant of \c sprintf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	sprintf_P(char *__s, const char *__fmt, ...);

/**
   Like \c sprintf(), but instead of assuming \c s to be of infinite
   size, no more than \c n characters (including the trailing NUL
   character) will be converted to \c s.

   Returns the number of characters that would have been written to
   \c s if there were enough space.
*/
extern int	snprintf(char *__s, size_t __n, const char *__fmt, ...);

/**
   Variant of \c snprintf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	snprintf_P(char *__s, size_t __n, const char *__fmt, ...);

/**
   Like \c sprintf() but takes a variable argument list for the
   arguments.
*/
extern int	vsprintf(char *__s, const char *__fmt, va_list ap);

/**
   Variant of \c vsprintf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	vsprintf_P(char *__s, const char *__fmt, va_list ap);

/**
   Like \c vsprintf(), but instead of assuming \c s to be of infinite
   size, no more than \c n characters (including the trailing NUL
   character) will be converted to \c s.

   Returns the number of characters that would have been written to
   \c s if there were enough space.
*/
extern int	vsnprintf(char *__s, size_t __n, const char *__fmt, va_list ap);

/**
   Variant of \c vsnprintf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	vsnprintf_P(char *__s, size_t __n, const char *__fmt, va_list ap);
/**
   The function \c fprintf performs formatted output to \c stream.
   See \c vfprintf() for details.
*/
extern int	fprintf(FILE *__stream, const char *__fmt, ...);

/**
   Variant of \c fprintf() that uses a \c fmt string that resides
   in program memory.
*/
extern int	fprintf_P(FILE *__stream, const char *__fmt, ...);

/**
   Write the string pointed to by \c str to stream \c stream.

   Returns 0 on success and EOF on error.
*/
extern int	fputs(const char *__str, FILE *__stream);

/**
   Variant of fputs() where \c str resides in program memory.
*/
extern int	fputs_P(const char *__str, FILE *__stream);

/**
   Write the string pointed to by \c str, and a trailing newline
   character, to \c stdout.
*/
extern int	puts(const char *__str);

/**
   Variant of puts() where \c str resides in program memory.
*/
extern int	puts_P(const char *__str);

/**
   Write \c nmemb objects, \c size bytes each, to \c stream.
   The first byte of the first object is referenced by \c ptr.

   Returns the number of objects successfully written, i. e.
   \c nmemb unless an output error occured.
 */
extern size_t	fwrite(const void *__ptr, size_t __size, size_t __nmemb,
		       FILE *__stream);

/**
   The function \c fgetc reads a character from \c stream.  It returns
   the character, or \c EOF in case end-of-file was encountered or an
   error occurred.  The routines feof() or ferror() must be used to
   distinguish between both situations.
*/
extern int	fgetc(FILE *__stream);

#if !defined(__DOXYGEN__)

/* getc() function implementation, required by standard */
extern int	getc(FILE *__stream);

/* getchar() function implementation, required by standard */
extern int	getchar(void);

#endif /* not __DOXYGEN__ */

/**
   The macro \c getc used to be a "fast" macro implementation with a
   functionality identical to fgetc().  For space constraints, in
   \c avr-libc, it is just an alias for \c fgetc.
*/
#define getc(__stream) fgetc(__stream)

/**
   The macro \c getchar reads a character from \c stdin.  Return
   values and error handling is identical to fgetc().
*/
#define getchar() fgetc(stdin)

/**
   The ungetc() function pushes the character \c c (converted to an
   unsigned char) back onto the input stream pointed to by \c stream.
   The pushed-back character will be returned by a subsequent read on
   the stream.

   Currently, only a single character can be pushed back onto the
   stream.
   
   The ungetc() function returns the character pushed back after the
   conversion, or \c EOF if the operation fails.  If the value of the
   argument \c c character equals \c EOF, the operation will fail and
   the stream will remain unchanged.
*/
extern int	ungetc(int __c, FILE *__stream);

/**
   Read at most <tt>size - 1</tt> bytes from \c stream, until a
   newline character was encountered, and store the characters in the
   buffer pointed to by \c str.  Unless an error was encountered while
   reading, the string will then be terminated with a \c NUL
   character.

   If an error was encountered, the function returns NULL and sets the
   error flag of \c stream, which can be tested using ferror().
   Otherwise, a pointer to the string will be returned.  */
extern char	*fgets(char *__str, int __size, FILE *__stream);

/**
   Similar to fgets() except that it will operate on stream \c stdin,
   and the trailing newline (if any) will not be stored in the string.
   It is the caller's responsibility to provide enough storage to hold
   the characters read.  */
extern char	*gets(char *__str);

/**
   Read \c nmemb objects, \c size bytes each, from \c stream,
   to the buffer pointed to by \c ptr.

   Returns the number of objects successfully read, i. e.
   \c nmemb unless an input error occured or end-of-file was
   encountered.  feof() and ferror() must be used to distinguish
   between these two conditions.
 */
extern size_t	fread(void *__ptr, size_t __size, size_t __nmemb,
		      FILE *__stream);

/**
   Clear the error and end-of-file flags of \c stream.
 */
extern void	clearerr(FILE *__stream);

#if !defined(__DOXYGEN__)
/* fast inlined version of clearerr() */
#define clearerror(s) do { (s)->flags &= ~(__SERR | __SEOF); } while(0)
#endif /* !defined(__DOXYGEN__) */

/**
   Test the end-of-file flag of \c stream.  This flag can only be cleared
   by a call to clearerr().
 */
extern int	feof(FILE *__stream);

#if !defined(__DOXYGEN__)
/* fast inlined version of feof() */
#define feof(s) ((s)->flags & __SEOF)
#endif /* !defined(__DOXYGEN__) */

/**
   Test the error flag of \c stream.  This flag can only be cleared
   by a call to clearerr().
 */
extern int	ferror(FILE *__stream);

#if !defined(__DOXYGEN__)
/* fast inlined version of ferror() */
#define ferror(s) ((s)->flags & __SERR)
#endif /* !defined(__DOXYGEN__) */

extern int	vfscanf(FILE *__stream, const char *__fmt, va_list __ap);

/**
   Variant of vfscanf() using a \c fmt string in program memory.
 */
extern int	vfscanf_P(FILE *__stream, const char *__fmt, va_list __ap);

/**
   The function \c fscanf performs formatted input, reading the
   input data from \c stream.

   See vfscanf() for details.
 */
extern int	fscanf(FILE *__stream, const char *__fmt, ...);

/**
   Variant of fscanf() using a \c fmt string in program memory.
 */
extern int	fscanf_P(FILE *__stream, const char *__fmt, ...);

/**
   The function \c scanf performs formatted input from stream \c stdin.

   See vfscanf() for details.
 */
extern int	scanf(const char *__fmt, ...);

/**
   Variant of scanf() where \c fmt resides in program memory.
 */
extern int	scanf_P(const char *__fmt, ...);

/**
   The function \c vscanf performs formatted input from stream
   \c stdin, taking a variable argument list as in vfscanf().

   See vfscanf() for details.
*/
extern int	vscanf(const char *__fmt, va_list __ap);

/**
   The function \c sscanf performs formatted input, reading the
   input data from the buffer pointed to by \c buf.

   See vfscanf() for details.
 */
extern int	sscanf(const char *__buf, const char *__fmt, ...);

/**
   Variant of sscanf() using a \c fmt string in program memory.
 */
extern int	sscanf_P(const char *__buf, const char *__fmt, ...);

#if defined(__DOXYGEN__)
/**
   Flush \c stream.

   This is a null operation provided for source-code compatibility
   only, as the standard IO implementation currently does not perform
   any buffering.
 */
extern int	fflush(FILE *stream);
#else
static __inline__ int fflush(FILE *stream __attribute__((unused)))
{
	return 0;
}
#endif

#ifdef __cplusplus
}
#endif

/*@}*/

/*
 * The following constants are currently not used by avr-libc's
 * stdio subsystem.  They are defined here since the gcc build
 * environment expects them to be here.
 */
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2

#endif /* __ASSEMBLER */

#endif /* _STDLIB_H_ */