169 lines
4.9 KiB
C
169 lines
4.9 KiB
C
/* Optimizing macros and inline functions for stdio functions.
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Copyright (C) 1998, 2000 Free Software Foundation, Inc.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _STDIO_H
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# error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
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#endif
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#ifdef __cplusplus
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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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/* 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) __THROW
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{
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return vfprintf (stdout, __fmt, __arg);
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}
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/* Read a character from stdin. */
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__STDIO_INLINE int
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getchar (void) __THROW
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{
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return _IO_getc (stdin);
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}
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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) __THROW
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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) __THROW
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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) __THROW
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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) __THROW
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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) __THROW
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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) __THROW
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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) __THROW
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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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feof_unlocked (FILE *__stream) __THROW
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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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ferror_unlocked (FILE *__stream) __THROW
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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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#endif /* Use extern inlines. */
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#if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__
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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) * (n)) <= 8 && (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) * (n); __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) * (n)) - __cnt) / (size); }) \
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: (((__builtin_constant_p (size) && (size) == 0) \
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|| (__builtin_constant_p (n) && (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), 0) \
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: fread_unlocked (ptr, size, n, stream))))
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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) * (n)) <= 8 && (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) * (n); __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) * (n)) - __cnt) / (size); }) \
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: (((__builtin_constant_p (size) && (size) == 0) \
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|| (__builtin_constant_p (n) && (n) == 0)) \
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/* Evaluate all parameters once. */ \
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? ((void) (ptr), (void) (stream), (void) (size), n) \
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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
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