stdlib/bits/stdlib.h

   1 /* Checking macros for stdlib functions.
   2    Copyright (C) 2005 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _STDLIB_H
  21 # error "Never include <bits/stdlib.h> directly; use <stdlib.h> instead."
  22 #endif
  23
  24 extern char *__realpath_chk (__const char *__restrict __name,
  25                              char *__restrict __resolved,
  26                              size_t __resolvedlen) __THROW __wur;
  27 extern char *__REDIRECT_NTH (__realpath_alias,
  28                              (__const char *__restrict __name,
  29                               char *__restrict __resolved), realpath) __wur;
  30
  31 extern __always_inline __wur char *
  32 __NTH (realpath (__const char *__restrict __name, char *__restrict __resolved))
  33 {
  34   if (__bos (__resolved) != (size_t) -1)
  35     return __realpath_chk (__name, __resolved, __bos (__resolved));
  36
  37   return __realpath_alias (__name, __resolved);
  38 }
  39
  40
  41 extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
  42                             size_t __nreal) __THROW __nonnull ((2));
  43 extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
  44                                                size_t __buflen), ptsname_r)
  45      __nonnull ((2));
  46
  47 extern __always_inline int
  48 __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
  49 {
  50   if (__bos (__buf) != (size_t) -1
  51       && (!__builtin_constant_p (__buflen) || __buflen > __bos (__buf)))
  52     return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf));
  53   return __ptsname_r_alias (__fd, __buf, __buflen);
  54 }
  55
  56
  57 extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
  58   __THROW __wur;
  59 extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
  60                            wctomb) __wur;
  61
  62 extern __always_inline __wur int
  63 __NTH (wctomb (char *__s, wchar_t __wchar))
  64 {
  65   /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
  66      But this would only disturb the namespace.  So we define our own
  67      version here.  */
  68 #define __STDLIB_MB_LEN_MAX     16
  69 #if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
  70 # error "Assumed value of MB_LEN_MAX wrong"
  71 #endif
  72   if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
  73     return __wctomb_chk (__s, __wchar, __bos (__s));
  74   return __wctomb_alias (__s, __wchar);
  75 }
  76
  77
  78 extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
  79                               __const char *__restrict __src,
  80                               size_t __len, size_t __dstlen) __THROW;
  81 extern size_t __REDIRECT_NTH (__mbstowcs_alias,
  82                               (wchar_t *__restrict __dst,
  83                                __const char *__restrict __src,
  84                                size_t __len), mbstowcs);
  85
  86 extern __always_inline size_t
  87 __NTH (mbstowcs (wchar_t *__restrict __dst, __const char *__restrict __src,
  88                  size_t __len))
  89 {
  90   if (__bos (__dst) != (size_t) -1
  91       && (!__builtin_constant_p (__len)
  92           || __len > __bos (__dst) / sizeof (wchar_t)))
  93     return __mbstowcs_chk (__dst, __src, __len,
  94                            __bos (__dst) / sizeof (wchar_t));
  95   return __mbstowcs_alias (__dst, __src, __len);
  96 }
  97
  98
  99 extern size_t __wcstombs_chk (char *__restrict __dst,
 100                               __const wchar_t *__restrict __src,
 101                               size_t __len, size_t __dstlen) __THROW;
 102 extern size_t __REDIRECT_NTH (__wcstombs_alias,
 103                               (char *__restrict __dst,
 104                                __const wchar_t *__restrict __src,
 105                                size_t __len), wcstombs);
 106
 107 extern __always_inline size_t
 108 __NTH (wcstombs (char *__restrict __dst, __const wchar_t *__restrict __src,
 109                  size_t __len))
 110 {
 111   if (__bos (__dst) != (size_t) -1
 112       && (!__builtin_constant_p (__len) || __len > __bos (__dst)))
 113     return __wcstombs_chk (__dst, __src, __len, __bos (__dst));
 114   return __wcstombs_alias (__dst, __src, __len);
 115 }