1/* Checking macros for stdlib functions.
2   Copyright (C) 2005, 2007 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
24extern char *__realpath_chk (__const char *__restrict __name,
25			     char *__restrict __resolved,
26			     size_t __resolvedlen) __THROW __wur;
27extern char *__REDIRECT_NTH (__realpath_alias,
28			     (__const char *__restrict __name,
29			      char *__restrict __resolved), realpath) __wur;
30extern char *__REDIRECT_NTH (__realpath_chk_warn,
31			     (__const char *__restrict __name,
32			      char *__restrict __resolved,
33			      size_t __resolvedlen), __realpath_chk) __wur
34     __warnattr ("second argument of realpath must be either NULL or at "
35		 "least PATH_MAX bytes long buffer");
36
37__extern_always_inline __wur char *
38__NTH (realpath (__const char *__restrict __name, char *__restrict __resolved))
39{
40  if (__bos (__resolved) != (size_t) -1)
41    {
42#if defined _LIBC_LIMITS_H_ && defined PATH_MAX
43      if (__bos (__resolved) < PATH_MAX)
44	return __realpath_chk_warn (__name, __resolved, __bos (__resolved));
45#endif
46      return __realpath_chk (__name, __resolved, __bos (__resolved));
47    }
48
49  return __realpath_alias (__name, __resolved);
50}
51
52
53extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
54			    size_t __nreal) __THROW __nonnull ((2));
55extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
56					       size_t __buflen), ptsname_r)
57     __nonnull ((2));
58extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
59			   (int __fd, char *__buf, size_t __buflen,
60			    size_t __nreal), __ptsname_r_chk)
61     __nonnull ((2)) __warnattr ("ptsname_r called with buflen bigger than "
62				 "size of buf");
63
64__extern_always_inline int
65__NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
66{
67  if (__bos (__buf) != (size_t) -1)
68    {
69      if (!__builtin_constant_p (__buflen))
70	return __ptsname_r_chk (__fd, __buf, __buflen, __bos (__buf));
71      if (__buflen > __bos (__buf))
72	return __ptsname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));
73    }
74  return __ptsname_r_alias (__fd, __buf, __buflen);
75}
76
77
78extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
79  __THROW __wur;
80extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
81			   wctomb) __wur;
82
83__extern_always_inline __wur int
84__NTH (wctomb (char *__s, wchar_t __wchar))
85{
86  /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
87     But this would only disturb the namespace.  So we define our own
88     version here.  */
89#define __STDLIB_MB_LEN_MAX	16
90#if defined MB_LEN_MAX && MB_LEN_MAX != __STDLIB_MB_LEN_MAX
91# error "Assumed value of MB_LEN_MAX wrong"
92#endif
93  if (__bos (__s) != (size_t) -1 && __STDLIB_MB_LEN_MAX > __bos (__s))
94    return __wctomb_chk (__s, __wchar, __bos (__s));
95  return __wctomb_alias (__s, __wchar);
96}
97
98
99extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
100			      __const char *__restrict __src,
101			      size_t __len, size_t __dstlen) __THROW;
102extern size_t __REDIRECT_NTH (__mbstowcs_alias,
103			      (wchar_t *__restrict __dst,
104			       __const char *__restrict __src,
105			       size_t __len), mbstowcs);
106extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
107			      (wchar_t *__restrict __dst,
108			       __const char *__restrict __src,
109			       size_t __len, size_t __dstlen), __mbstowcs_chk)
110     __warnattr ("mbstowcs called with dst buffer smaller than len "
111		 "* sizeof (wchar_t)");
112
113__extern_always_inline size_t
114__NTH (mbstowcs (wchar_t *__restrict __dst, __const char *__restrict __src,
115		 size_t __len))
116{
117  if (__bos (__dst) != (size_t) -1)
118    {
119      if (!__builtin_constant_p (__len))
120	return __mbstowcs_chk (__dst, __src, __len,
121			       __bos (__dst) / sizeof (wchar_t));
122
123      if (__len > __bos (__dst) / sizeof (wchar_t))
124	return __mbstowcs_chk_warn (__dst, __src, __len,
125				     __bos (__dst) / sizeof (wchar_t));
126    }
127  return __mbstowcs_alias (__dst, __src, __len);
128}
129
130
131extern size_t __wcstombs_chk (char *__restrict __dst,
132			      __const wchar_t *__restrict __src,
133			      size_t __len, size_t __dstlen) __THROW;
134extern size_t __REDIRECT_NTH (__wcstombs_alias,
135			      (char *__restrict __dst,
136			       __const wchar_t *__restrict __src,
137			       size_t __len), wcstombs);
138extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
139			      (char *__restrict __dst,
140			       __const wchar_t *__restrict __src,
141			       size_t __len, size_t __dstlen), __wcstombs_chk)
142     __warnattr ("wcstombs called with dst buffer smaller than len");
143
144__extern_always_inline size_t
145__NTH (wcstombs (char *__restrict __dst, __const wchar_t *__restrict __src,
146		 size_t __len))
147{
148  if (__bos (__dst) != (size_t) -1)
149    {
150      if (!__builtin_constant_p (__len))
151	return __wcstombs_chk (__dst, __src, __len, __bos (__dst));
152      if (__len > __bos (__dst))
153	return __wcstombs_chk_warn (__dst, __src, __len, __bos (__dst));
154    }
155  return __wcstombs_alias (__dst, __src, __len);
156}
157