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Edit File: stdio.h
/* Optimizing macros and inline functions for stdio functions. Copyright (C) 1998-2021 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, see <https://www.gnu.org/licenses/>. */ #ifndef _BITS_STDIO_H #define _BITS_STDIO_H 1 #ifndef _STDIO_H # error "Never include <bits/stdio.h> directly; use <stdio.h> instead." #endif #ifndef __extern_inline # define __STDIO_INLINE inline #else # define __STDIO_INLINE __extern_inline #endif #ifdef __USE_EXTERN_INLINES /* For -D_FORTIFY_SOURCE{,=2,=3} bits/stdio2.h will define a different inline. */ # if !(__USE_FORTIFY_LEVEL > 0 && defined __fortify_function) /* Write formatted output to stdout from argument list ARG. */ __STDIO_INLINE int vprintf (const char *__restrict __fmt, __gnuc_va_list __arg) { return vfprintf (stdout, __fmt, __arg); } # endif /* Read a character from stdin. */ __STDIO_INLINE int getchar (void) { return getc (stdin); } # ifdef __USE_MISC /* Faster version when locking is not necessary. */ __STDIO_INLINE int fgetc_unlocked (FILE *__fp) { return __getc_unlocked_body (__fp); } # endif /* misc */ # ifdef __USE_POSIX199506 /* This is defined in POSIX.1:1996. */ __STDIO_INLINE int getc_unlocked (FILE *__fp) { return __getc_unlocked_body (__fp); } /* This is defined in POSIX.1:1996. */ __STDIO_INLINE int getchar_unlocked (void) { return __getc_unlocked_body (stdin); } # endif /* POSIX */ /* Write a character to stdout. */ __STDIO_INLINE int putchar (int __c) { return putc (__c, stdout); } # ifdef __USE_MISC /* Faster version when locking is not necessary. */ __STDIO_INLINE int fputc_unlocked (int __c, FILE *__stream) { return __putc_unlocked_body (__c, __stream); } # endif /* misc */ # ifdef __USE_POSIX199506 /* This is defined in POSIX.1:1996. */ __STDIO_INLINE int putc_unlocked (int __c, FILE *__stream) { return __putc_unlocked_body (__c, __stream); } /* This is defined in POSIX.1:1996. */ __STDIO_INLINE int putchar_unlocked (int __c) { return __putc_unlocked_body (__c, stdout); } # endif /* POSIX */ # ifdef __USE_GNU /* Like `getdelim', but reads up to a newline. */ __STDIO_INLINE __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 __feof_unlocked_body (__stream); } /* Faster versions when locking is not required. */ __STDIO_INLINE int __NTH (ferror_unlocked (FILE *__stream)) { return __ferror_unlocked_body (__stream); } # endif /* misc */ #endif /* Use extern inlines. */ #if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__ \ && !defined __cplusplus /* 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 = 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 (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 #endif /* bits/stdio.h. */