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 /* In case nobody has defined these types, but we aren't running under 46 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE__TYPE__, and 47 __WCHAR_TYPE__ have reasonable values. This can happen if the 48 parts of GCC is compiled by an older compiler, that actually 49 include gstddef.h, such as collect2. */ 50 51 /* Signed type of difference of two pointers. */ 52 53 /* Define this type if we are doing the whole job, 54 or if we want this type in particular. */ 55 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t) 56 #ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */ 57 #ifndef _T_PTRDIFF_ 58 #ifndef _T_PTRDIFF 59 #ifndef __PTRDIFF_T 60 #ifndef _PTRDIFF_T_ 61 #ifndef ___int_ptrdiff_t_h 62 #ifndef _GCC_PTRDIFF_T 63 #define _PTRDIFF_T 64 #define _T_PTRDIFF_ 65 #define _T_PTRDIFF 66 #define __PTRDIFF_T 67 #define _PTRDIFF_T_ 68 #define ___int_ptrdiff_t_h 69 #define _GCC_PTRDIFF_T 70 #ifndef __PTRDIFF_TYPE__ 71 #define __PTRDIFF_TYPE__ long int 72 #endif 73 typedef __PTRDIFF_TYPE__ ptrdiff_t; 74 #endif /* _GCC_PTRDIFF_T */ 75 #endif /* ___int_ptrdiff_t_h */ 76 #endif /* _PTRDIFF_T_ */ 77 #endif /* __PTRDIFF_T */ 78 #endif /* _T_PTRDIFF */ 79 #endif /* _T_PTRDIFF_ */ 80 #endif /* _PTRDIFF_T */ 81 82 /* If this symbol has done its job, get rid of it. */ 83 #undef __need_ptrdiff_t 84 85 #endif /* _STDDEF_H or __need_ptrdiff_t. */ 86 87 /* Unsigned type of `sizeof' something. */ 88 89 /* Define this type if we are doing the whole job, 90 or if we want this type in particular. */ 91 #if defined (_STDDEF_H) || defined (__need_size_t) 92 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */ 93 #ifndef _T_SIZE_ 94 #ifndef _T_SIZE 95 #ifndef __SIZE_T 96 #ifndef _SIZE_T_ 97 #ifndef ___int_size_t_h 98 #ifndef _GCC_SIZE_T 99 #ifndef _SIZET_ 100 #define _SIZE_T 101 #define _T_SIZE_ 102 #define _T_SIZE 103 #define __SIZE_T 104 #define _SIZE_T_ 105 #define ___int_size_t_h 106 #define _GCC_SIZE_T 107 #define _SIZET_ 108 #ifndef __SIZE_TYPE__ 109 #define __SIZE_TYPE__ long unsigned int 110 #endif 111 typedef __SIZE_TYPE__ size_t; 112 #endif /* _SIZET_ */ 113 #endif /* _GCC_SIZE_T */ 114 #endif /* ___int_size_t_h */ 115 #endif /* _SIZE_T_ */ 116 #endif /* __SIZE_T */ 117 #endif /* _T_SIZE */ 118 #endif /* _T_SIZE_ */ 119 #endif /* _SIZE_T */ 120 #undef __need_size_t 121 #endif /* _STDDEF_H or __need_size_t. */ 122 123 124 /* Wide character type. 125 Locale-writers should change this as necessary to 126 be big enough to hold unique values not between 0 and 127, 127 and not (wchar_t) -1, for each defined multibyte character. */ 128 129 /* Define this type if we are doing the whole job, 130 or if we want this type in particular. */ 131 #if defined (_STDDEF_H) || defined (__need_wchar_t) 132 #ifndef _WCHAR_T 133 #ifndef _T_WCHAR_ 134 #ifndef _T_WCHAR 135 #ifndef __WCHAR_T 136 #ifndef _WCHAR_T_ 137 #ifndef ___int_wchar_t_h 138 #ifndef _GCC_WCHAR_T 139 #define _WCHAR_T 140 #define _T_WCHAR_ 141 #define _T_WCHAR 142 #define __WCHAR_T 143 #define _WCHAR_T_ 144 #define ___int_wchar_t_h 145 #define _GCC_WCHAR_T 146 #ifndef __WCHAR_TYPE__ 147 #define __WCHAR_TYPE__ int 148 #endif 149 #ifdef __GNUG__ 150 /* In C++, wchar_t is a distinct basic type, 151 and we can expect __wchar_t to be defined by cc1plus. */ 152 typedef __wchar_t wchar_t; 153 #else 154 /* In C, cpp tells us which type to make an alias for. */ 155 typedef __WCHAR_TYPE__ wchar_t; 156 #endif 157 #endif 158 #endif 159 #endif 160 #endif 161 #endif 162 #endif 163 #endif 164 #undef __need_wchar_t 165 #endif /* _STDDEF_H or __need_wchar_t. */ 166 167 /* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc. 168 are already defined. We need not worry about the case of wanting just 169 one of these types, not on 4.3bsd-net2, because only the GNU libc 170 header files do that. */ 171 #ifdef _ANSI_H_ 172 #undef _PTRDIFF_T_ 173 #ifdef _STDDEF_H /* This is a kludge. 174 _STDDEF_H is defined when we are using the whole file, 175 undefined when obstack.h wants just ptrdiff_t. */ 176 #undef _SIZE_T_ 177 #undef _WCHAR_T_ 178 #endif 179 #endif 180 181 #endif /* __sys_stdtypes_h */ 182 183 /* A null pointer constant. */ 184 185 #if defined (_STDDEF_H) || defined (__need_NULL) 186 #undef NULL /* in case <stdio.h> has defined it. */ 187 #define NULL ((void *)0) 188 #endif /* NULL not defined and <stddef.h> or need NULL. */ 189 #undef __need_NULL 190 191 #ifdef _STDDEF_H 192 193 /* Offset of member MEMBER in a struct of type TYPE. */ 194 195 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 196 197 #endif /* _STDDEF_H was defined this time */ 198 199 #endif /* _ANSI_STDDEF_H was not defined before */ 200 #endif /* _STDDEF_H_ was not defined before */ 201 #endif /* _STDDEF_H was not defined before */ 202