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- /* Checking macros for stdio functions.
- Copyright (C) 2004, 2005, 2007 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
- #ifndef _STDIO_H
- # error "Never include <bits/stdio2.h> directly; use <stdio.h> instead."
- #endif
-
- extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen,
- __const char *__restrict __format, ...) __THROW;
- extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen,
- __const char *__restrict __format,
- _G_va_list __ap) __THROW;
-
- #ifdef __va_arg_pack
- __extern_always_inline int
- __NTH (sprintf (char *__restrict __s, __const char *__restrict __fmt, ...))
- {
- return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
- __bos (__s), __fmt, __va_arg_pack ());
- }
- #elif !defined __cplusplus
- # define sprintf(str, ...) \
- __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \
- __VA_ARGS__)
- #endif
-
- __extern_always_inline int
- __NTH (vsprintf (char *__restrict __s, __const char *__restrict __fmt,
- _G_va_list __ap))
- {
- return __builtin___vsprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
- __bos (__s), __fmt, __ap);
- }
-
- #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
-
- extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag,
- size_t __slen, __const char *__restrict __format,
- ...) __THROW;
- extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag,
- size_t __slen, __const char *__restrict __format,
- _G_va_list __ap) __THROW;
-
- # ifdef __va_arg_pack
- __extern_always_inline int
- __NTH (snprintf (char *__restrict __s, size_t __n,
- __const char *__restrict __fmt, ...))
- {
- return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
- __bos (__s), __fmt, __va_arg_pack ());
- }
- # elif !defined __cplusplus
- # define snprintf(str, len, ...) \
- __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
- __VA_ARGS__)
- # endif
-
- __extern_always_inline int
- __NTH (vsnprintf (char *__restrict __s, size_t __n,
- __const char *__restrict __fmt, _G_va_list __ap))
- {
- return __builtin___vsnprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
- __bos (__s), __fmt, __ap);
- }
-
- #endif
-
- #if __USE_FORTIFY_LEVEL > 1
-
- extern int __fprintf_chk (FILE *__restrict __stream, int __flag,
- __const char *__restrict __format, ...);
- extern int __printf_chk (int __flag, __const char *__restrict __format, ...);
- extern int __vfprintf_chk (FILE *__restrict __stream, int __flag,
- __const char *__restrict __format, _G_va_list __ap);
- extern int __vprintf_chk (int __flag, __const char *__restrict __format,
- _G_va_list __ap);
-
- # ifdef __va_arg_pack
- __extern_always_inline int
- fprintf (FILE *__restrict __stream, __const char *__restrict __fmt, ...)
- {
- return __fprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
- __va_arg_pack ());
- }
-
- __extern_always_inline int
- printf (__const char *__restrict __fmt, ...)
- {
- return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
- }
- # elif !defined __cplusplus
- # define printf(...) \
- __printf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
- # define fprintf(stream, ...) \
- __fprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
- # endif
-
- __extern_always_inline int
- vprintf (__const char *__restrict __fmt, _G_va_list __ap)
- {
- #ifdef __USE_EXTERN_INLINES
- return __vfprintf_chk (stdout, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
- #else
- return __vprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap);
- #endif
- }
-
- __extern_always_inline int
- vfprintf (FILE *__restrict __stream,
- __const char *__restrict __fmt, _G_va_list __ap)
- {
- return __vfprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
- }
-
- #endif
-
- extern char *__gets_chk (char *__str, size_t) __wur;
- extern char *__REDIRECT (__gets_warn, (char *__str), gets)
- __wur __warnattr ("please use fgets or getline instead, gets can't "
- "specify buffer size");
-
- __extern_always_inline __wur char *
- gets (char *__str)
- {
- if (__bos (__str) != (size_t) -1)
- return __gets_chk (__str, __bos (__str));
- return __gets_warn (__str);
- }
-
- extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
- FILE *__restrict __stream) __wur;
- extern char *__REDIRECT (__fgets_alias,
- (char *__restrict __s, int __n,
- FILE *__restrict __stream), fgets) __wur;
- extern char *__REDIRECT (__fgets_chk_warn,
- (char *__restrict __s, size_t __size, int __n,
- FILE *__restrict __stream), __fgets_chk)
- __wur __warnattr ("fgets called with bigger size than length "
- "of destination buffer");
-
- __extern_always_inline __wur char *
- fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
- {
- if (__bos (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgets_chk (__s, __bos (__s), __n, __stream);
-
- if ((size_t) __n > __bos (__s))
- return __fgets_chk_warn (__s, __bos (__s), __n, __stream);
- }
- return __fgets_alias (__s, __n, __stream);
- }
-
- extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream) __wur;
- extern size_t __REDIRECT (__fread_alias,
- (void *__restrict __ptr, size_t __size,
- size_t __n, FILE *__restrict __stream),
- fread) __wur;
- extern size_t __REDIRECT (__fread_chk_warn,
- (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream),
- __fread_chk)
- __wur __warnattr ("fread called with bigger size * nmemb than length "
- "of destination buffer");
-
- __extern_always_inline __wur size_t
- fread (void *__restrict __ptr, size_t __size, size_t __n,
- FILE *__restrict __stream)
- {
- if (__bos0 (__ptr) != (size_t) -1)
- {
- if (!__builtin_constant_p (__size)
- || !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
- return __fread_chk (__ptr, __bos0 (__ptr), __size, __n, __stream);
-
- if (__size * __n > __bos0 (__ptr))
- return __fread_chk_warn (__ptr, __bos0 (__ptr), __size, __n, __stream);
- }
- return __fread_alias (__ptr, __size, __n, __stream);
- }
-
- #ifdef __USE_GNU
- extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size,
- int __n, FILE *__restrict __stream) __wur;
- extern char *__REDIRECT (__fgets_unlocked_alias,
- (char *__restrict __s, int __n,
- FILE *__restrict __stream), fgets_unlocked) __wur;
- extern char *__REDIRECT (__fgets_unlocked_chk_warn,
- (char *__restrict __s, size_t __size, int __n,
- FILE *__restrict __stream), __fgets_unlocked_chk)
- __wur __warnattr ("fgets_unlocked called with bigger size than length "
- "of destination buffer");
-
- __extern_always_inline __wur char *
- fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
- {
- if (__bos (__s) != (size_t) -1)
- {
- if (!__builtin_constant_p (__n) || __n <= 0)
- return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
-
- if ((size_t) __n > __bos (__s))
- return __fgets_unlocked_chk_warn (__s, __bos (__s), __n, __stream);
- }
- return __fgets_unlocked_alias (__s, __n, __stream);
- }
- #endif
-
- #ifdef __USE_MISC
- # undef fread_unlocked
- extern size_t __fread_unlocked_chk (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream) __wur;
- extern size_t __REDIRECT (__fread_unlocked_alias,
- (void *__restrict __ptr, size_t __size,
- size_t __n, FILE *__restrict __stream),
- fread_unlocked) __wur;
- extern size_t __REDIRECT (__fread_unlocked_chk_warn,
- (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream),
- __fread_unlocked_chk)
- __wur __warnattr ("fread_unlocked called with bigger size * nmemb than "
- "length of destination buffer");
-
- __extern_always_inline __wur size_t
- fread_unlocked (void *__restrict __ptr, size_t __size, size_t __n,
- FILE *__restrict __stream)
- {
- if (__bos0 (__ptr) != (size_t) -1)
- {
- if (!__builtin_constant_p (__size)
- || !__builtin_constant_p (__n)
- || (__size | __n) >= (((size_t) 1) << (8 * sizeof (size_t) / 2)))
- return __fread_unlocked_chk (__ptr, __bos0 (__ptr), __size, __n,
- __stream);
-
- if (__size * __n > __bos0 (__ptr))
- return __fread_unlocked_chk_warn (__ptr, __bos0 (__ptr), __size, __n,
- __stream);
- }
-
- # ifdef __USE_EXTERN_INLINES
- if (__builtin_constant_p (__size)
- && __builtin_constant_p (__n)
- && (__size | __n) < (((size_t) 1) << (8 * sizeof (size_t) / 2))
- && __size * __n <= 8)
- {
- size_t __cnt = __size * __n;
- char *__cptr = (char *) __ptr;
- if (__cnt == 0)
- return 0;
-
- for (; __cnt > 0; --__cnt)
- {
- int __c = _IO_getc_unlocked (__stream);
- if (__c == EOF)
- break;
- *__cptr++ = __c;
- }
- return (__cptr - (char *) __ptr) / __size;
- }
- # endif
- return __fread_unlocked_alias (__ptr, __size, __n, __stream);
- }
- #endif
-