stdio.h
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上传日期:2009-04-28
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- /* Optimizing macros and inline functions for stdio functions.
- Copyright (C) 1998, 2000, 2001, 2004 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _STDIO_H
- # error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
- #endif
- #ifdef __cplusplus
- # define __STDIO_INLINE inline
- #else
- # define __STDIO_INLINE extern __inline
- #endif
- #ifdef __USE_EXTERN_INLINES
- /* 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);
- }
- /* Read a character from stdin. */
- __STDIO_INLINE int
- getchar (void)
- {
- return _IO_getc (stdin);
- }
- # 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__
- /* 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