/* Optimizing macros and inline functions for stdio functions.

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Copyright (C) 1998-2018 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, see

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<http://www.gnu.org/licenses/>. */

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#ifndef _BITS_STDIO_H

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#define _BITS_STDIO_H 1

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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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#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,=3} bits/stdio2.h will define a different

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inline. */

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# if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function)

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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, __gnuc_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 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 __getc_unlocked_body (__fp);

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}

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# endif /* misc */

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# ifdef __USE_POSIX

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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 __getc_unlocked_body (__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 __getc_unlocked_body (stdin);

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}

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# endif /* POSIX */

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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 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 __putc_unlocked_body (__c, __stream);

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}

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# endif /* misc */

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# ifdef __USE_POSIX

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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 __putc_unlocked_body (__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 __putc_unlocked_body (__c, stdout);

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}

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# endif /* POSIX */

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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 __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 __feof_unlocked_body (__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 __ferror_unlocked_body (__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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&& !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 = 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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# 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 (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

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#endif /* bits/stdio.h. */

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