1 /* Declarations for getopt. 2 Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify it 5 under the terms of the GNU General Public License as published by the 6 Free Software Foundation; either version 2, or (at your option) any 7 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, write to the Free Software 16 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ 17 18 #ifndef _GETOPT_H 19 #define _GETOPT_H 1 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 #ifndef __MacOSX__ 26 27 /* For communication from `getopt' to the caller. 28 When `getopt' finds an option that takes an argument, 29 the argument value is returned here. 30 Also, when `ordering' is RETURN_IN_ORDER, 31 each non-option ARGV-element is returned here. */ 32 33 extern char *optarg; 34 35 /* Index in ARGV of the next element to be scanned. 36 This is used for communication to and from the caller 37 and for communication between successive calls to `getopt'. 38 39 On entry to `getopt', zero means this is the first call; initialize. 40 41 When `getopt' returns EOF, this is the index of the first of the 42 non-option elements that the caller should itself scan. 43 44 Otherwise, `optind' communicates from one call to the next 45 how much of ARGV has been scanned so far. */ 46 47 extern int optind; 48 49 /* Callers store zero here to inhibit the error message `getopt' prints 50 for unrecognized options. */ 51 52 extern int opterr; 53 54 /* Set to an option character which was unrecognized. */ 55 56 extern int optopt; 57 #endif 58 59 /* Describe the long-named options requested by the application. 60 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector 61 of `struct option' terminated by an element containing a name which is 62 zero. 63 64 The field `has_arg' is: 65 no_argument (or 0) if the option does not take an argument, 66 required_argument (or 1) if the option requires an argument, 67 optional_argument (or 2) if the option takes an optional argument. 68 69 If the field `flag' is not NULL, it points to a variable that is set 70 to the value given in the field `val' when the option is found, but 71 left unchanged if the option is not found. 72 73 To have a long-named option do something other than set an `int' to 74 a compiled-in constant, such as set a value from `optarg', set the 75 option's `flag' field to zero and its `val' field to a nonzero 76 value (the equivalent single-letter option character, if there is 77 one). For long options that have a zero `flag' field, `getopt' 78 returns the contents of the `val' field. */ 79 80 struct option 81 { 82 #if __STDC__ 83 const char *name; 84 #else 85 char *name; 86 #endif 87 /* has_arg can't be an enum because some compilers complain about 88 type mismatches in all the code that assumes it is an int. */ 89 int has_arg; 90 int *flag; 91 int val; 92 }; 93 94 /* Names for the values of the `has_arg' field of `struct option'. */ 95 96 #define no_argument 0 97 #define required_argument 1 98 #define optional_argument 2 99 100 //#if __STDC__ || defined(PROTO) 101 #if defined(__GNU_LIBRARY__) 102 /* Many other libraries have conflicting prototypes for getopt, with 103 differences in the consts, in stdlib.h. To avoid compilation 104 errors, only prototype getopt for the GNU C library. */ 105 extern int getopt (int argc, char *const *argv, const char *shortopts); 106 #endif /* not __GNU_LIBRARY__ */ 107 extern int getopt_long (int argc, char *const *argv, const char *shortopts, 108 const struct option *longopts, int *longind); 109 extern int getopt_long_only (int argc, char *const *argv, 110 const char *shortopts, 111 const struct option *longopts, int *longind); 112 113 /* Internal only. Users should not call this directly. */ 114 extern int _getopt_internal (int argc, char *const *argv, 115 const char *shortopts, 116 const struct option *longopts, int *longind, 117 int long_only); 118 //#else /* not __STDC__ */ 119 extern int getopt (int argc, char *const *argv, const char *shortopts); 120 //extern int getopt_long (); 121 //extern int getopt_long_only (); 122 123 //extern int _getopt_internal (); 124 //#endif /* not __STDC__ */ 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 #endif /* _GETOPT_H */ 131