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| Current File : //usr/include/bits/stdio.h |
/* Optimizing macros and inline functions for stdio functions.
Copyright (C) 1998,2000,2001,2004,2007,2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _STDIO_H
# error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
#endif
#ifndef __extern_inline
# define __STDIO_INLINE inline
#else
# define __STDIO_INLINE __extern_inline
#endif
#ifdef __USE_EXTERN_INLINES
/* For -D_FORTIFY_SOURCE{,=2} bits/stdio2.h will define a different
inline. */
# if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function)
/* Write formatted output to stdout from argument list ARG. */
__STDIO_INLINE int
vprintf (const char *__restrict __fmt, _G_va_list __arg)
{
return vfprintf (stdout, __fmt, __arg);
}
# endif
/* Read a character from stdin. */
__STDIO_INLINE int
getchar (void)
{
return _IO_getc (stdin);
}
# ifdef __USE_MISC
/* Faster version when locking is not necessary. */
__STDIO_INLINE int
fgetc_unlocked (FILE *__fp)
{
return _IO_getc_unlocked (__fp);
}
# endif /* misc */
# if defined __USE_POSIX || defined __USE_MISC
/* This is defined in POSIX.1:1996. */
__STDIO_INLINE int
getc_unlocked (FILE *__fp)
{
return _IO_getc_unlocked (__fp);
}
/* This is defined in POSIX.1:1996. */
__STDIO_INLINE int
getchar_unlocked (void)
{
return _IO_getc_unlocked (stdin);
}
# endif /* POSIX || misc */
/* Write a character to stdout. */
__STDIO_INLINE int
putchar (int __c)
{
return _IO_putc (__c, stdout);
}
# ifdef __USE_MISC
/* Faster version when locking is not necessary. */
__STDIO_INLINE int
fputc_unlocked (int __c, FILE *__stream)
{
return _IO_putc_unlocked (__c, __stream);
}
# endif /* misc */
# if defined __USE_POSIX || defined __USE_MISC
/* This is defined in POSIX.1:1996. */
__STDIO_INLINE int
putc_unlocked (int __c, FILE *__stream)
{
return _IO_putc_unlocked (__c, __stream);
}
/* This is defined in POSIX.1:1996. */
__STDIO_INLINE int
putchar_unlocked (int __c)
{
return _IO_putc_unlocked (__c, stdout);
}
# endif /* POSIX || misc */
# ifdef __USE_GNU
/* Like `getdelim', but reads up to a newline. */
__STDIO_INLINE _IO_ssize_t
getline (char **__lineptr, size_t *__n, FILE *__stream)
{
return __getdelim (__lineptr, __n, '\n', __stream);
}
# endif /* GNU */
# ifdef __USE_MISC
/* Faster versions when locking is not required. */
__STDIO_INLINE int
__NTH (feof_unlocked (FILE *__stream))
{
return _IO_feof_unlocked (__stream);
}
/* Faster versions when locking is not required. */
__STDIO_INLINE int
__NTH (ferror_unlocked (FILE *__stream))
{
return _IO_ferror_unlocked (__stream);
}
# endif /* misc */
#endif /* Use extern inlines. */
#if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__ \
&& !defined __cplusplus
/* Perform some simple optimizations. */
# define fread_unlocked(ptr, size, n, stream) \
(__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \
&& (size_t) (size) * (size_t) (n) <= 8 \
&& (size_t) (size) != 0) \
? ({ char *__ptr = (char *) (ptr); \
FILE *__stream = (stream); \
size_t __cnt; \
for (__cnt = (size_t) (size) * (size_t) (n); \
__cnt > 0; --__cnt) \
{ \
int __c = _IO_getc_unlocked (__stream); \
if (__c == EOF) \
break; \
*__ptr++ = __c; \
} \
((size_t) (size) * (size_t) (n) - __cnt) \
/ (size_t) (size); }) \
: (((__builtin_constant_p (size) && (size_t) (size) == 0) \
|| (__builtin_constant_p (n) && (size_t) (n) == 0)) \
/* Evaluate all parameters once. */ \
? ((void) (ptr), (void) (stream), (void) (size), \
(void) (n), (size_t) 0) \
: fread_unlocked (ptr, size, n, stream))))
# define fwrite_unlocked(ptr, size, n, stream) \
(__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \
&& (size_t) (size) * (size_t) (n) <= 8 \
&& (size_t) (size) != 0) \
? ({ const char *__ptr = (const char *) (ptr); \
FILE *__stream = (stream); \
size_t __cnt; \
for (__cnt = (size_t) (size) * (size_t) (n); \
__cnt > 0; --__cnt) \
if (_IO_putc_unlocked (*__ptr++, __stream) == EOF) \
break; \
((size_t) (size) * (size_t) (n) - __cnt) \
/ (size_t) (size); }) \
: (((__builtin_constant_p (size) && (size_t) (size) == 0) \
|| (__builtin_constant_p (n) && (size_t) (n) == 0)) \
/* Evaluate all parameters once. */ \
? ((void) (ptr), (void) (stream), (void) (size), \
(void) (n), (size_t) 0) \
: fwrite_unlocked (ptr, size, n, stream))))
#endif
/* Define helper macro. */
#undef __STDIO_INLINE