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/* Optimizing macros and inline functions for stdio functions. |
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Copyright (C) 1998, 2000, 2001, 2004, 2007 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with the GNU C Library; if not, write to the Free |
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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02111-1307 USA. */ |
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#ifndef _STDIO_H |
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# error "Never include directly; use instead." |
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#endif |
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#ifndef __extern_inline |
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# define __STDIO_INLINE inline |
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#else |
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# define __STDIO_INLINE __extern_inline |
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#endif |
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#ifdef __USE_EXTERN_INLINES |
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/* For -D_FORTIFY_SOURCE{,=2} bits/stdio2.h will define a different |
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inline. */ |
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# if !(__USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline) |
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/* Write formatted output to stdout from argument list ARG. */ |
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__STDIO_INLINE int |
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vprintf (__const char *__restrict __fmt, _G_va_list __arg) |
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{ |
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return vfprintf (stdout, __fmt, __arg); |
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} |
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# endif |
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/* Read a character from stdin. */ |
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__STDIO_INLINE int |
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getchar (void) |
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{ |
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return _IO_getc (stdin); |
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} |
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# ifdef __USE_MISC |
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/* Faster version when locking is not necessary. */ |
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__STDIO_INLINE int |
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fgetc_unlocked (FILE *__fp) |
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{ |
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return _IO_getc_unlocked (__fp); |
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} |
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# endif /* misc */ |
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# if defined __USE_POSIX || defined __USE_MISC |
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/* This is defined in POSIX.1:1996. */ |
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__STDIO_INLINE int |
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getc_unlocked (FILE *__fp) |
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{ |
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return _IO_getc_unlocked (__fp); |
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} |
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/* This is defined in POSIX.1:1996. */ |
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__STDIO_INLINE int |
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getchar_unlocked (void) |
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{ |
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return _IO_getc_unlocked (stdin); |
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} |
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# endif /* POSIX || misc */ |
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/* Write a character to stdout. */ |
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__STDIO_INLINE int |
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putchar (int __c) |
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{ |
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return _IO_putc (__c, stdout); |
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} |
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# ifdef __USE_MISC |
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/* Faster version when locking is not necessary. */ |
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__STDIO_INLINE int |
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fputc_unlocked (int __c, FILE *__stream) |
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{ |
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return _IO_putc_unlocked (__c, __stream); |
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} |
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# endif /* misc */ |
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# if defined __USE_POSIX || defined __USE_MISC |
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/* This is defined in POSIX.1:1996. */ |
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__STDIO_INLINE int |
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putc_unlocked (int __c, FILE *__stream) |
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{ |
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return _IO_putc_unlocked (__c, __stream); |
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} |
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/* This is defined in POSIX.1:1996. */ |
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__STDIO_INLINE int |
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putchar_unlocked (int __c) |
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{ |
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return _IO_putc_unlocked (__c, stdout); |
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} |
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# endif /* POSIX || misc */ |
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# ifdef __USE_GNU |
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/* Like `getdelim', but reads up to a newline. */ |
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__STDIO_INLINE _IO_ssize_t |
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getline (char **__lineptr, size_t *__n, FILE *__stream) |
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{ |
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return __getdelim (__lineptr, __n, '\n', __stream); |
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} |
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# endif /* GNU */ |
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# ifdef __USE_MISC |
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/* Faster versions when locking is not required. */ |
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__STDIO_INLINE int |
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__NTH (feof_unlocked (FILE *__stream)) |
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{ |
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return _IO_feof_unlocked (__stream); |
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} |
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/* Faster versions when locking is not required. */ |
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__STDIO_INLINE int |
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__NTH (ferror_unlocked (FILE *__stream)) |
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{ |
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return _IO_ferror_unlocked (__stream); |
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} |
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# endif /* misc */ |
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139
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#endif /* Use extern inlines. */ |
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141
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142
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#if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__ \ |
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&& !defined __cplusplus |
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/* Perform some simple optimizations. */ |
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# define fread_unlocked(ptr, size, n, stream) \ |
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(__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \ |
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&& (size_t) (size) * (size_t) (n) <= 8 \ |
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&& (size_t) (size) != 0) \ |
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? ({ char *__ptr = (char *) (ptr); \ |
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FILE *__stream = (stream); \ |
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size_t __cnt; \ |
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for (__cnt = (size_t) (size) * (size_t) (n); \ |
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__cnt > 0; --__cnt) \ |
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{ \ |
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int __c = _IO_getc_unlocked (__stream); \ |
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if (__c == EOF) \ |
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break; \ |
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*__ptr++ = __c; \ |
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} \ |
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((size_t) (size) * (size_t) (n) - __cnt) \ |
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/ (size_t) (size); }) \ |
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: (((__builtin_constant_p (size) && (size_t) (size) == 0) \ |
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|| (__builtin_constant_p (n) && (size_t) (n) == 0)) \ |
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/* Evaluate all parameters once. */ \ |
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? ((void) (ptr), (void) (stream), (void) (size), \ |
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(void) (n), (size_t) 0) \ |
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: fread_unlocked (ptr, size, n, stream)))) |
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169
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# define fwrite_unlocked(ptr, size, n, stream) \ |
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(__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \ |
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&& (size_t) (size) * (size_t) (n) <= 8 \ |
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&& (size_t) (size) != 0) \ |
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? ({ const char *__ptr = (const char *) (ptr); \ |
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FILE *__stream = (stream); \ |
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size_t __cnt; \ |
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for (__cnt = (size_t) (size) * (size_t) (n); \ |
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__cnt > 0; --__cnt) \ |
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if (_IO_putc_unlocked (*__ptr++, __stream) == EOF) \ |
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break; \ |
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((size_t) (size) * (size_t) (n) - __cnt) \ |
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/ (size_t) (size); }) \ |
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: (((__builtin_constant_p (size) && (size_t) (size) == 0) \ |
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|| (__builtin_constant_p (n) && (size_t) (n) == 0)) \ |
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/* Evaluate all parameters once. */ \ |
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? ((void) (ptr), (void) (stream), (void) (size), \ |
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(void) (n), (size_t) 0) \ |
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: fwrite_unlocked (ptr, size, n, stream)))) |
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#endif |
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/* Define helper macro. */ |
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#undef __STDIO_INLINE |