n2n-3.1.1.tar.gz: n2n-3.1.1/win32/getopt.h

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1 /** 2 * (C) 2007-22 - ntop.org and contributors 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 3 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not see see <http://www.gnu.org/licenses/> 16 * 17 */ 18 19 /* Declarations for getopt. 20 Copyright (C) 1989,90,91,92,93,94,96,97,98 Free Software Foundation, Inc. 21 This file is part of the GNU C Library. 22 23 The GNU C Library is free software; you can redistribute it and/or 24 modify it under the terms of the GNU Library General Public License as 25 published by the Free Software Foundation; either version 2 of the 26 License, or (at your option) any later version. 27 28 The GNU C Library is distributed in the hope that it will be useful, 29 but WITHOUT ANY WARRANTY; without even the implied warranty of 30 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 31 Library General Public License for more details. 32 33 You should have received a copy of the GNU Library General Public 34 License along with the GNU C Library; see the file COPYING.LIB. If not, 35 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 36 Boston, MA 02111-1307, USA. */ 37 38 #ifndef _GETOPT_H 39 40 #ifndef __need_getopt 41 # define _GETOPT_H 1 42 #endif 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* For communication from `getopt' to the caller. 49 When `getopt' finds an option that takes an argument, 50 the argument value is returned here. 51 Also, when `ordering' is RETURN_IN_ORDER, 52 each non-option ARGV-element is returned here. */ 53 54 extern char *optarg; 55 56 /* Index in ARGV of the next element to be scanned. 57 This is used for communication to and from the caller 58 and for communication between successive calls to `getopt'. 59 60 On entry to `getopt', zero means this is the first call; initialize. 61 62 When `getopt' returns -1, this is the index of the first of the 63 non-option elements that the caller should itself scan. 64 65 Otherwise, `optind' communicates from one call to the next 66 how much of ARGV has been scanned so far. */ 67 68 extern int optind; 69 70 /* Callers store zero here to inhibit the error message `getopt' prints 71 for unrecognized options. */ 72 73 extern int opterr; 74 75 /* Set to an option character which was unrecognized. */ 76 77 extern int optopt; 78 79 #ifndef __need_getopt 80 /* Describe the long-named options requested by the application. 81 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector 82 of `struct option' terminated by an element containing a name which is 83 zero. 84 85 The field `has_arg' is: 86 no_argument (or 0) if the option does not take an argument, 87 required_argument (or 1) if the option requires an argument, 88 optional_argument (or 2) if the option takes an optional argument. 89 90 If the field `flag' is not NULL, it points to a variable that is set 91 to the value given in the field `val' when the option is found, but 92 left unchanged if the option is not found. 93 94 To have a long-named option do something other than set an `int' to 95 a compiled-in constant, such as set a value from `optarg', set the 96 option's `flag' field to zero and its `val' field to a nonzero 97 value (the equivalent single-letter option character, if there is 98 one). For long options that have a zero `flag' field, `getopt' 99 returns the contents of the `val' field. */ 100 101 struct option 102 { 103 # if defined __STDC__ && __STDC__ 104 const char *name; 105 # else 106 char *name; 107 # endif 108 /* has_arg can't be an enum because some compilers complain about 109 type mismatches in all the code that assumes it is an int. */ 110 int has_arg; 111 int *flag; 112 int val; 113 }; 114 115 /* Names for the values of the `has_arg' field of `struct option'. */ 116 117 # define no_argument 0 118 # define required_argument 1 119 # define optional_argument 2 120 #endif /* need getopt */ 121 122 123 /* Get definitions and prototypes for functions to process the 124 arguments in ARGV (ARGC of them, minus the program name) for 125 options given in OPTS. 126 127 Return the option character from OPTS just read. Return -1 when 128 there are no more options. For unrecognized options, or options 129 missing arguments, `optopt' is set to the option letter, and '?' is 130 returned. 131 132 The OPTS string is a list of characters which are recognized option 133 letters, optionally followed by colons, specifying that that letter 134 takes an argument, to be placed in `optarg'. 135 136 If a letter in OPTS is followed by two colons, its argument is 137 optional. This behavior is specific to the GNU `getopt'. 138 139 The argument `--' causes premature termination of argument 140 scanning, explicitly telling `getopt' that there are no more 141 options. 142 143 If OPTS begins with `--', then non-option arguments are treated as 144 arguments to the option '\0'. This behavior is specific to the GNU 145 `getopt'. */ 146 147 #if defined __STDC__ && __STDC__ 148 # ifdef __GNU_LIBRARY__ 149 /* Many other libraries have conflicting prototypes for getopt, with 150 differences in the consts, in stdlib.h. To avoid compilation 151 errors, only prototype getopt for the GNU C library. */ 152 extern int getopt (int __argc, char *const *__argv, const char *__shortopts); 153 # else /* not __GNU_LIBRARY__ */ 154 extern int getopt (); 155 # endif /* __GNU_LIBRARY__ */ 156 157 # ifndef __need_getopt 158 extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts, 159 const struct option *__longopts, int *__longind); 160 extern int getopt_long_only (int __argc, char *const *__argv, 161 const char *__shortopts, 162 const struct option *__longopts, int *__longind); 163 164 /* Internal only. Users should not call this directly. */ 165 extern int _getopt_internal (int __argc, char *const *__argv, 166 const char *__shortopts, 167 const struct option *__longopts, int *__longind, 168 int __long_only); 169 # endif 170 #else /* not __STDC__ */ 171 extern int getopt (); 172 # ifndef __need_getopt 173 extern int getopt_long (); 174 extern int getopt_long_only (); 175 176 extern int _getopt_internal (); 177 # endif 178 #endif /* __STDC__ */ 179 180 #ifdef __cplusplus 181 } 182 #endif 183 184 /* Make sure we later can get all the definitions and declarations. */ 185 #undef __need_getopt 186 187 #endif /* getopt.h */