00001 /* from http://www.pwilson.net/getopt.html */ -00002 -00003 /* getopt.h */ -00004 /* Declarations for getopt. -00005 Copyright (C) 1989-1994, 1996-1999, 2001 Free Software -00006 Foundation, Inc. This file is part of the GNU C Library. -00007 -00008 The GNU C Library is free software; you can redistribute -00009 it and/or modify it under the terms of the GNU Lesser -00010 General Public License as published by the Free Software -00011 Foundation; either version 2.1 of the License, or -00012 (at your option) any later version. -00013 -00014 The GNU C Library is distributed in the hope that it will -00015 be useful, but WITHOUT ANY WARRANTY; without even the -00016 implied warranty of MERCHANTABILITY or FITNESS FOR A -00017 PARTICULAR PURPOSE. See the GNU Lesser General Public -00018 License for more details. -00019 -00020 You should have received a copy of the GNU Lesser General -00021 Public License along with the GNU C Library; if not, write -00022 to the Free Software Foundation, Inc., 59 Temple Place, -00023 Suite 330, Boston, MA 02111-1307 USA. */ -00024 -00025 -00026 -00027 -00028 -00029 #ifndef _GETOPT_H -00030 -00031 #ifndef __need_getopt -00032 # define _GETOPT_H 1 -00033 #endif -00034 -00035 /* If __GNU_LIBRARY__ is not already defined, either we are being used -00036 standalone, or this is the first header included in the source file. -00037 If we are being used with glibc, we need to include <features.h>, but -00038 that does not exist if we are standalone. So: if __GNU_LIBRARY__ is -00039 not defined, include <ctype.h>, which will pull in <features.h> for us -00040 if it's from glibc. (Why ctype.h? It's guaranteed to exist and it -00041 doesn't flood the namespace with stuff the way some other headers do.) */ -00042 #if !defined __GNU_LIBRARY__ -00043 # include <ctype.h> -00044 #endif -00045 -00046 #ifdef __cplusplus -00047 extern "C" { -00048 #endif -00049 -00050 /* For communication from `getopt' to the caller. -00051 When `getopt' finds an option that takes an argument, -00052 the argument value is returned here. -00053 Also, when `ordering' is RETURN_IN_ORDER, -00054 each non-option ARGV-element is returned here. */ -00055 -00056 extern char *optarg; -00057 -00058 /* Index in ARGV of the next element to be scanned. -00059 This is used for communication to and from the caller -00060 and for communication between successive calls to `getopt'. -00061 -00062 On entry to `getopt', zero means this is the first call; initialize. -00063 -00064 When `getopt' returns -1, this is the index of the first of the -00065 non-option elements that the caller should itself scan. -00066 -00067 Otherwise, `optind' communicates from one call to the next -00068 how much of ARGV has been scanned so far. */ -00069 -00070 extern int optind; -00071 -00072 /* Callers store zero here to inhibit the error message `getopt' prints -00073 for unrecognized options. */ -00074 -00075 extern int opterr; -00076 -00077 /* Set to an option character which was unrecognized. */ -00078 -00079 extern int optopt; -00080 -00081 #ifndef __need_getopt -00082 /* Describe the long-named options requested by the application. -00083 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector -00084 of `struct option' terminated by an element containing a name which is -00085 zero. -00086 -00087 The field `has_arg' is: -00088 no_argument (or 0) if the option does not take an argument, -00089 required_argument (or 1) if the option requires an argument, -00090 optional_argument (or 2) if the option takes an optional argument. -00091 -00092 If the field `flag' is not NULL, it points to a variable that is set -00093 to the value given in the field `val' when the option is found, but -00094 left unchanged if the option is not found. -00095 -00096 To have a long-named option do something other than set an `int' to -00097 a compiled-in constant, such as set a value from `optarg', set the -00098 option's `flag' field to zero and its `val' field to a nonzero -00099 value (the equivalent single-letter option character, if there is -00100 one). For long options that have a zero `flag' field, `getopt' -00101 returns the contents of the `val' field. */ -00102 -00103 struct option -00104 { -00105 # if (defined __STDC__ && __STDC__) || defined __cplusplus -00106 const char *name; -00107 # else -00108 char *name; -00109 # endif -00110 /* has_arg can't be an enum because some compilers complain about -00111 type mismatches in all the code that assumes it is an int. */ -00112 int has_arg; -00113 int *flag; -00114 int val; -00115 }; -00116 -00117 /* Names for the values of the `has_arg' field of `struct option'. */ -00118 -00119 # define no_argument 0 -00120 # define required_argument 1 -00121 # define optional_argument 2 -00122 #endif /* need getopt */ -00123 -00124 -00125 /* Get definitions and prototypes for functions to process the -00126 arguments in ARGV (ARGC of them, minus the program name) for -00127 options given in OPTS. -00128 -00129 Return the option character from OPTS just read. Return -1 when -00130 there are no more options. For unrecognized options, or options -00131 missing arguments, `optopt' is set to the option letter, and '?' is -00132 returned. -00133 -00134 The OPTS string is a list of characters which are recognized option -00135 letters, optionally followed by colons, specifying that that letter -00136 takes an argument, to be placed in `optarg'. -00137 -00138 If a letter in OPTS is followed by two colons, its argument is -00139 optional. This behavior is specific to the GNU `getopt'. -00140 -00141 The argument `--' causes premature termination of argument -00142 scanning, explicitly telling `getopt' that there are no more -00143 options. -00144 -00145 If OPTS begins with `--', then non-option arguments are treated as -00146 arguments to the option '\0'. This behavior is specific to the GNU -00147 `getopt'. */ -00148 -00149 #if (defined __STDC__ && __STDC__) || defined __cplusplus -00150 # ifdef __GNU_LIBRARY__ -00151 /* Many other libraries have conflicting prototypes for getopt, with -00152 differences in the consts, in stdlib.h. To avoid compilation -00153 errors, only prototype getopt for the GNU C library. */ -00154 extern int getopt (int ___argc, char *const *___argv, const char *__shortopts); -00155 # else /* not __GNU_LIBRARY__ */ -00156 extern int getopt (); -00157 # endif /* __GNU_LIBRARY__ */ -00158 -00159 # ifndef __need_getopt -00160 extern int getopt_long (int ___argc, char *const *___argv, -00161 const char *__shortopts, -00162 const struct option *__longopts, int *__longind); -00163 extern int getopt_long_only (int ___argc, char *const *___argv, -00164 const char *__shortopts, -00165 const struct option *__longopts, int *__longind); -00166 -00167 /* Internal only. Users should not call this directly. */ -00168 extern int _getopt_internal (int ___argc, char *const *___argv, -00169 const char *__shortopts, -00170 const struct option *__longopts, int *__longind, -00171 int __long_only); -00172 # endif -00173 #else /* not __STDC__ */ -00174 extern int getopt (); -00175 # ifndef __need_getopt -00176 extern int getopt_long (); -00177 extern int getopt_long_only (); -00178 -00179 extern int _getopt_internal (); -00180 # endif -00181 #endif /* __STDC__ */ -00182 -00183 #ifdef __cplusplus -00184 } -00185 #endif -00186 -00187 /* Make sure we later can get all the definitions and declarations. */ -00188 #undef __need_getopt -00189 -00190 #endif /* getopt.h */ -00191 -
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