* sysdeps/ieee754/dbl-64/s_expm1.c: Set errno for overflow.
[glibc.git] / stdlib / bits / stdlib.h
blobf6af5e518c0b8adc74c868f572ae7751acaa2d87
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.
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.
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.
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. */
20 #ifndef _STDLIB_H
21 # error "Never include <bits/stdlib.h> directly; use <stdlib.h> instead."
22 #endif
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 extern 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");
37 __extern_always_inline __wur char *
38 __NTH (realpath (__const char *__restrict __name, char *__restrict __resolved))
40 if (__bos (__resolved) != (size_t) -1)
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));
49 return __realpath_alias (__name, __resolved);
53 extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
54 size_t __nreal) __THROW __nonnull ((2));
55 extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
56 size_t __buflen), ptsname_r)
57 __nonnull ((2));
58 extern 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");
64 __extern_always_inline int
65 __NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
67 if (__bos (__buf) != (size_t) -1)
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));
74 return __ptsname_r_alias (__fd, __buf, __buflen);
78 extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
79 __THROW __wur;
80 extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
81 wctomb) __wur;
83 __extern_always_inline __wur int
84 __NTH (wctomb (char *__s, wchar_t __wchar))
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);
99 extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
100 __const char *__restrict __src,
101 size_t __len, size_t __dstlen) __THROW;
102 extern size_t __REDIRECT_NTH (__mbstowcs_alias,
103 (wchar_t *__restrict __dst,
104 __const char *__restrict __src,
105 size_t __len), mbstowcs);
106 extern 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)");
113 __extern_always_inline size_t
114 __NTH (mbstowcs (wchar_t *__restrict __dst, __const char *__restrict __src,
115 size_t __len))
117 if (__bos (__dst) != (size_t) -1)
119 if (!__builtin_constant_p (__len))
120 return __mbstowcs_chk (__dst, __src, __len,
121 __bos (__dst) / sizeof (wchar_t));
123 if (__len > __bos (__dst) / sizeof (wchar_t))
124 return __mbstowcs_chk_warn (__dst, __src, __len,
125 __bos (__dst) / sizeof (wchar_t));
127 return __mbstowcs_alias (__dst, __src, __len);
131 extern size_t __wcstombs_chk (char *__restrict __dst,
132 __const wchar_t *__restrict __src,
133 size_t __len, size_t __dstlen) __THROW;
134 extern size_t __REDIRECT_NTH (__wcstombs_alias,
135 (char *__restrict __dst,
136 __const wchar_t *__restrict __src,
137 size_t __len), wcstombs);
138 extern 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");
144 __extern_always_inline size_t
145 __NTH (wcstombs (char *__restrict __dst, __const wchar_t *__restrict __src,
146 size_t __len))
148 if (__bos (__dst) != (size_t) -1)
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));
155 return __wcstombs_alias (__dst, __src, __len);