1 #ifndef _STDDEF_H 2 #ifndef _STDDEF_H_ 3 #ifndef _ANSI_STDDEF_H 4 5 /* Any one of these symbols __need_* means that GNU libc 6 wants us just to define one data type. So don't define 7 the symbols that indicate this file's entire job has been done. */ 8 #if (!defined(__need_wchar_t) && !defined(__need_size_t) \ 9 && !defined(__need_ptrdiff_t) && !defined(__need_NULL)) 10 #define _STDDEF_H 11 #define _STDDEF_H_ 12 /* snaroff@next.com says the NeXT needs this. */ 13 #define _ANSI_STDDEF_H 14 #endif 15 16 #ifndef __sys_stdtypes_h 17 /* This avoids lossage on SunOS but only if stdtypes.h comes first. 18 There's no way to win with the other order! Sun lossage. */ 19 20 /* On 4.3bsd-net2, make sure ansi.h is included, so we have 21 one less case to deal with in the following. */ 22 #if defined (__BSD_NET2__) || defined (__386BSD__) 23 #include <machine/ansi.h> 24 #endif 25 26 /* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are 27 defined if the corresponding type is *not* defined. */ 28 #ifdef _ANSI_H_ 29 #ifndef _SIZE_T_ 30 #define _SIZE_T 31 #endif 32 #ifndef _PTRDIFF_T_ 33 #define _PTRDIFF_T 34 #endif 35 #ifndef _WCHAR_T_ 36 #define _WCHAR_T 37 #endif 38 #undef _PTRDIFF_T_ 39 #ifndef __need_ptrdiff_t 40 #undef _SIZE_T_ 41 #undef _WCHAR_T_ 42 #endif 43 #endif /* _ANSI_H_ */ 44 45 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way. 46 Just ignore it. */ 47 #if defined (__sequent__) && defined (_PTRDIFF_T_) 48 #undef _PTRDIFF_T_ 49 #endif 50 51 /* In case nobody has defined these types, but we aren't running under 52 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE__TYPE__, and 53 __WCHAR_TYPE__ have reasonable values. This can happen if the 54 parts of GCC is compiled by an older compiler, that actually 55 include gstddef.h, such as collect2. */ 56 57 /* Signed type of difference of two pointers. */ 58 59 /* Define this type if we are doing the whole job, 60 or if we want this type in particular. */ 61 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t) 62 #ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */ 63 #ifndef _T_PTRDIFF_ 64 #ifndef _T_PTRDIFF 65 #ifndef __PTRDIFF_T 66 #ifndef _PTRDIFF_T_ 67 #ifndef ___int_ptrdiff_t_h 68 #ifndef _GCC_PTRDIFF_T 69 #define _PTRDIFF_T 70 #define _T_PTRDIFF_ 71 #define _T_PTRDIFF 72 #define __PTRDIFF_T 73 #define _PTRDIFF_T_ 74 #define ___int_ptrdiff_t_h 75 #define _GCC_PTRDIFF_T 76 #ifndef __PTRDIFF_TYPE__ 77 #define __PTRDIFF_TYPE__ long int 78 #endif 79 typedef __PTRDIFF_TYPE__ ptrdiff_t; 80 #endif /* _GCC_PTRDIFF_T */ 81 #endif /* ___int_ptrdiff_t_h */ 82 #endif /* _PTRDIFF_T_ */ 83 #endif /* __PTRDIFF_T */ 84 #endif /* _T_PTRDIFF */ 85 #endif /* _T_PTRDIFF_ */ 86 #endif /* _PTRDIFF_T */ 87 88 /* If this symbol has done its job, get rid of it. */ 89 #undef __need_ptrdiff_t 90 91 #endif /* _STDDEF_H or __need_ptrdiff_t. */ 92 93 /* Unsigned type of `sizeof' something. */ 94 95 /* Define this type if we are doing the whole job, 96 or if we want this type in particular. */ 97 #if defined (_STDDEF_H) || defined (__need_size_t) 98 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */ 99 #ifndef _SYS_SIZE_T_H 100 #ifndef _T_SIZE_ 101 #ifndef _T_SIZE 102 #ifndef __SIZE_T 103 #ifndef _SIZE_T_ 104 #ifndef ___int_size_t_h 105 #ifndef _GCC_SIZE_T 106 #ifndef _SIZET_ 107 #define _SIZE_T 108 #define _SYS_SIZE_T_H 109 #define _T_SIZE_ 110 #define _T_SIZE 111 #define __SIZE_T 112 #define _SIZE_T_ 113 #define ___int_size_t_h 114 #define _GCC_SIZE_T 115 #define _SIZET_ 116 #ifndef __SIZE_TYPE__ 117 #define __SIZE_TYPE__ long unsigned int 118 #endif 119 typedef __SIZE_TYPE__ size_t; 120 #endif /* _SIZET_ */ 121 #endif /* _GCC_SIZE_T */ 122 #endif /* ___int_size_t_h */ 123 #endif /* _SIZE_T_ */ 124 #endif /* __SIZE_T */ 125 #endif /* _T_SIZE */ 126 #endif /* _T_SIZE_ */ 127 #endif /* _SYS_SIZE_T_H */ 128 #endif /* _SIZE_T */ 129 #undef __need_size_t 130 #endif /* _STDDEF_H or __need_size_t. */ 131 132 133 /* Wide character type. 134 Locale-writers should change this as necessary to 135 be big enough to hold unique values not between 0 and 127, 136 and not (wchar_t) -1, for each defined multibyte character. */ 137 138 /* Define this type if we are doing the whole job, 139 or if we want this type in particular. */ 140 #if defined (_STDDEF_H) || defined (__need_wchar_t) 141 #ifndef _WCHAR_T 142 #ifndef _T_WCHAR_ 143 #ifndef _T_WCHAR 144 #ifndef __WCHAR_T 145 #ifndef _WCHAR_T_ 146 #ifndef ___int_wchar_t_h 147 #ifndef _GCC_WCHAR_T 148 #define _WCHAR_T 149 #define _T_WCHAR_ 150 #define _T_WCHAR 151 #define __WCHAR_T 152 #define _WCHAR_T_ 153 #define ___int_wchar_t_h 154 #define _GCC_WCHAR_T 155 #ifndef __WCHAR_TYPE__ 156 #define __WCHAR_TYPE__ int 157 #endif 158 #ifdef __GNUG__ 159 /* In C++, wchar_t is a distinct basic type, 160 and we can expect __wchar_t to be defined by cc1plus. */ 161 typedef __wchar_t wchar_t; 162 #else 163 /* In C, cpp tells us which type to make an alias for. */ 164 typedef __WCHAR_TYPE__ wchar_t; 165 #endif 166 #endif 167 #endif 168 #endif 169 #endif 170 #endif 171 #endif 172 #endif 173 #undef __need_wchar_t 174 #endif /* _STDDEF_H or __need_wchar_t. */ 175 176 /* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc. 177 are already defined. We need not worry about the case of wanting just 178 one of these types, not on 4.3bsd-net2, because only the GNU libc 179 header files do that. */ 180 #ifdef _ANSI_H_ 181 #undef _PTRDIFF_T_ 182 #ifdef _STDDEF_H /* This is a kludge. 183 _STDDEF_H is defined when we are using the whole file, 184 undefined when obstack.h wants just ptrdiff_t. */ 185 #undef _SIZE_T_ 186 #undef _WCHAR_T_ 187 #endif 188 #endif 189 190 #endif /* __sys_stdtypes_h */ 191 192 /* A null pointer constant. */ 193 194 #if defined (_STDDEF_H) || defined (__need_NULL) 195 #undef NULL /* in case <stdio.h> has defined it. */ 196 #define NULL ((void *)0) 197 #endif /* NULL not defined and <stddef.h> or need NULL. */ 198 #undef __need_NULL 199 200 #ifdef _STDDEF_H 201 202 /* Offset of member MEMBER in a struct of type TYPE. */ 203 204 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 205 206 #endif /* _STDDEF_H was defined this time */ 207 208 #endif /* _ANSI_STDDEF_H was not defined before */ 209 #endif /* _STDDEF_H_ was not defined before */ 210 #endif /* _STDDEF_H was not defined before */ 211