1    	/* Optimizing macros and inline functions for stdio functions.
2    	   Copyright (C) 1998-2015 Free Software Foundation, Inc.
3    	   This file is part of the GNU C Library.
4    	
5    	   The GNU C Library is free software; you can redistribute it and/or
6    	   modify it under the terms of the GNU Lesser General Public
7    	   License as published by the Free Software Foundation; either
8    	   version 2.1 of the License, or (at your option) any later version.
9    	
10   	   The GNU C Library is distributed in the hope that it will be useful,
11   	   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   	   Lesser General Public License for more details.
14   	
15   	   You should have received a copy of the GNU Lesser General Public
16   	   License along with the GNU C Library; if not, see
17   	   <http://www.gnu.org/licenses/>.  */
18   	
19   	#ifndef _STDIO_H
20   	# error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
21   	#endif
22   	
23   	#ifndef __extern_inline
24   	# define __STDIO_INLINE inline
25   	#else
26   	# define __STDIO_INLINE __extern_inline
27   	#endif
28   	
29   	
30   	#ifdef __USE_EXTERN_INLINES
31   	/* For -D_FORTIFY_SOURCE{,=2} bits/stdio2.h will define a different
32   	   inline.  */
33   	# if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function)
34   	/* Write formatted output to stdout from argument list ARG.  */
35   	__STDIO_INLINE int
36   	vprintf (const char *__restrict __fmt, _G_va_list __arg)
37   	{
38   	  return vfprintf (stdout, __fmt, __arg);
39   	}
40   	# endif
41   	
42   	/* Read a character from stdin.  */
43   	__STDIO_INLINE int
44   	getchar (void)
45   	{
46   	  return _IO_getc (stdin);
47   	}
48   	
49   	
50   	# ifdef __USE_MISC
51   	/* Faster version when locking is not necessary.  */
52   	__STDIO_INLINE int
53   	fgetc_unlocked (FILE *__fp)
54   	{
55   	  return _IO_getc_unlocked (__fp);
56   	}
57   	# endif /* misc */
58   	
59   	
60   	# ifdef __USE_POSIX
61   	/* This is defined in POSIX.1:1996.  */
62   	__STDIO_INLINE int
63   	getc_unlocked (FILE *__fp)
64   	{
65   	  return _IO_getc_unlocked (__fp);
66   	}
67   	
68   	/* This is defined in POSIX.1:1996.  */
69   	__STDIO_INLINE int
70   	getchar_unlocked (void)
71   	{
72   	  return _IO_getc_unlocked (stdin);
73   	}
74   	# endif	/* POSIX */
75   	
76   	
77   	/* Write a character to stdout.  */
78   	__STDIO_INLINE int
79   	putchar (int __c)
80   	{
81   	  return _IO_putc (__c, stdout);
82   	}
83   	
84   	
85   	# ifdef __USE_MISC
86   	/* Faster version when locking is not necessary.  */
87   	__STDIO_INLINE int
88   	fputc_unlocked (int __c, FILE *__stream)
89   	{
90   	  return _IO_putc_unlocked (__c, __stream);
91   	}
92   	# endif /* misc */
93   	
94   	
95   	# ifdef __USE_POSIX
96   	/* This is defined in POSIX.1:1996.  */
97   	__STDIO_INLINE int
98   	putc_unlocked (int __c, FILE *__stream)
99   	{
100  	  return _IO_putc_unlocked (__c, __stream);
101  	}
102  	
103  	/* This is defined in POSIX.1:1996.  */
104  	__STDIO_INLINE int
105  	putchar_unlocked (int __c)
106  	{
107  	  return _IO_putc_unlocked (__c, stdout);
108  	}
109  	# endif	/* POSIX */
110  	
111  	
112  	# ifdef	__USE_GNU
113  	/* Like `getdelim', but reads up to a newline.  */
114  	__STDIO_INLINE _IO_ssize_t
115  	getline (char **__lineptr, size_t *__n, FILE *__stream)
116  	{
117  	  return __getdelim (__lineptr, __n, '\n', __stream);
118  	}
119  	# endif /* GNU */
120  	
121  	
122  	# ifdef __USE_MISC
123  	/* Faster versions when locking is not required.  */
124  	__STDIO_INLINE int
125  	__NTH (feof_unlocked (FILE *__stream))
126  	{
127  	  return _IO_feof_unlocked (__stream);
128  	}
129  	
130  	/* Faster versions when locking is not required.  */
131  	__STDIO_INLINE int
132  	__NTH (ferror_unlocked (FILE *__stream))
133  	{
134  	  return _IO_ferror_unlocked (__stream);
135  	}
136  	# endif /* misc */
137  	
138  	#endif /* Use extern inlines.  */
139  	
140  	
141  	#if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__ \
142  	    && !defined __cplusplus
143  	/* Perform some simple optimizations.  */
144  	# define fread_unlocked(ptr, size, n, stream) \
145  	  (__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n)    \
146  			   && (size_t) (size) * (size_t) (n) <= 8		      \
147  			   && (size_t) (size) != 0)				      \
148  			  ? ({ char *__ptr = (char *) (ptr);			      \
149  			       FILE *__stream = (stream);			      \
150  			       size_t __cnt;					      \
151  			       for (__cnt = (size_t) (size) * (size_t) (n);	      \
152  				    __cnt > 0; --__cnt)				      \
153  				 {						      \
154  				   int __c = _IO_getc_unlocked (__stream);	      \
155  				   if (__c == EOF)				      \
156  				     break;					      \
157  				   *__ptr++ = __c;				      \
158  				 }						      \
159  			       ((size_t) (size) * (size_t) (n) - __cnt)		      \
160  				/ (size_t) (size); })				      \
161  			  : (((__builtin_constant_p (size) && (size_t) (size) == 0)   \
162  			      || (__builtin_constant_p (n) && (size_t) (n) == 0))     \
163  				/* Evaluate all parameters once.  */		      \
164  			     ? ((void) (ptr), (void) (stream), (void) (size),	      \
165  				(void) (n), (size_t) 0)				      \
166  			     : fread_unlocked (ptr, size, n, stream))))
167  	
168  	# define fwrite_unlocked(ptr, size, n, stream) \
169  	  (__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n)    \
170  			   && (size_t) (size) * (size_t) (n) <= 8		      \
171  			   && (size_t) (size) != 0)				      \
172  			  ? ({ const char *__ptr = (const char *) (ptr);	      \
173  			       FILE *__stream = (stream);			      \
174  			       size_t __cnt;					      \
175  			       for (__cnt = (size_t) (size) * (size_t) (n);	      \
176  				    __cnt > 0; --__cnt)				      \
177  				 if (_IO_putc_unlocked (*__ptr++, __stream) == EOF)   \
178  				   break;					      \
179  			       ((size_t) (size) * (size_t) (n) - __cnt)		      \
180  				/ (size_t) (size); })				      \
181  			  : (((__builtin_constant_p (size) && (size_t) (size) == 0)   \
182  			      || (__builtin_constant_p (n) && (size_t) (n) == 0))     \
183  				/* Evaluate all parameters once.  */		      \
184  			     ? ((void) (ptr), (void) (stream), (void) (size),	      \
185  				(void) (n), (size_t) 0)				      \
186  			     : fwrite_unlocked (ptr, size, n, stream))))
187  	#endif
188  	
189  	/* Define helper macro.  */
190  	#undef __STDIO_INLINE
191