gvsig-raster / libjni-potrace / trunk / libjni-potrace / src / main / native / jpotrace / getopt.h @ 1780
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1 | 1780 | nbrodin | /* Declarations for getopt.
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2 | Copyright (C) 1989,90,91,92,93,94,96,97,98,99 Free Software Foundation, Inc.
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3 | This file is part of the GNU C Library.
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4 | |||
5 | The GNU C Library is free software; you can redistribute it and/or
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6 | modify it under the terms of the GNU Library General Public License as
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7 | published by the Free Software Foundation; either version 2 of the
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8 | License, or (at your option) any later version.
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9 | |||
10 | The GNU C Library is distributed in the hope that it will be useful,
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 | Library General Public License for more details.
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14 | |||
15 | You should have received a copy of the GNU Library General Public
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16 | License along with the GNU C Library; see the file COPYING.LIB. If not,
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17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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18 | Boston, MA 02111-1307, USA. */
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19 | |||
20 | #ifndef _GETOPT_H
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21 | |||
22 | #ifndef __need_getopt
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23 | # define _GETOPT_H 1 |
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24 | #endif
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25 | |||
26 | /* If __GNU_LIBRARY__ is not already defined, either we are being used
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27 | standalone, or this is the first header included in the source file.
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28 | If we are being used with glibc, we need to include <features.h>, but
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29 | that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
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30 | not defined, include <ctype.h>, which will pull in <features.h> for us
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31 | if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
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32 | doesn't flood the namespace with stuff the way some other headers do.) */
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33 | #if !defined __GNU_LIBRARY__
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34 | # include <ctype.h> |
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35 | #endif
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36 | |||
37 | #ifdef __cplusplus
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38 | extern "C" { |
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39 | #endif
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40 | |||
41 | /* For communication from `getopt' to the caller.
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42 | When `getopt' finds an option that takes an argument,
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43 | the argument value is returned here.
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44 | Also, when `ordering' is RETURN_IN_ORDER,
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45 | each non-option ARGV-element is returned here. */
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46 | |||
47 | extern char *optarg; |
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48 | |||
49 | /* Index in ARGV of the next element to be scanned.
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50 | This is used for communication to and from the caller
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51 | and for communication between successive calls to `getopt'.
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52 | |||
53 | On entry to `getopt', zero means this is the first call; initialize.
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54 | |||
55 | When `getopt' returns -1, this is the index of the first of the
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56 | non-option elements that the caller should itself scan.
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57 | |||
58 | Otherwise, `optind' communicates from one call to the next
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59 | how much of ARGV has been scanned so far. */
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60 | |||
61 | extern int optind; |
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62 | |||
63 | /* Callers store zero here to inhibit the error message `getopt' prints
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64 | for unrecognized options. */
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65 | |||
66 | extern int opterr; |
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67 | |||
68 | /* Set to an option character which was unrecognized. */
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69 | |||
70 | extern int optopt; |
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71 | |||
72 | #ifndef __need_getopt
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73 | /* Describe the long-named options requested by the application.
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74 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
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75 | of `struct option' terminated by an element containing a name which is
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76 | zero.
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77 | |||
78 | The field `has_arg' is:
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79 | no_argument (or 0) if the option does not take an argument,
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80 | required_argument (or 1) if the option requires an argument,
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81 | optional_argument (or 2) if the option takes an optional argument.
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82 | |||
83 | If the field `flag' is not NULL, it points to a variable that is set
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84 | to the value given in the field `val' when the option is found, but
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85 | left unchanged if the option is not found.
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86 | |||
87 | To have a long-named option do something other than set an `int' to
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88 | a compiled-in constant, such as set a value from `optarg', set the
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89 | option's `flag' field to zero and its `val' field to a nonzero
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90 | value (the equivalent single-letter option character, if there is
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91 | one). For long options that have a zero `flag' field, `getopt'
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92 | returns the contents of the `val' field. */
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93 | |||
94 | struct option
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95 | { |
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96 | # if defined __STDC__ && __STDC__
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97 | const char *name; |
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98 | # else
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99 | char *name;
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100 | # endif
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101 | /* has_arg can't be an enum because some compilers complain about
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102 | type mismatches in all the code that assumes it is an int. */
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103 | int has_arg;
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104 | int *flag;
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105 | int val;
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106 | }; |
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107 | |||
108 | /* Names for the values of the `has_arg' field of `struct option'. */
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109 | |||
110 | # define no_argument 0 |
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111 | # define required_argument 1 |
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112 | # define optional_argument 2 |
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113 | #endif /* need getopt */ |
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114 | |||
115 | |||
116 | /* Get definitions and prototypes for functions to process the
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117 | arguments in ARGV (ARGC of them, minus the program name) for
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118 | options given in OPTS.
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119 | |||
120 | Return the option character from OPTS just read. Return -1 when
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121 | there are no more options. For unrecognized options, or options
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122 | missing arguments, `optopt' is set to the option letter, and '?' is
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123 | returned.
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124 | |||
125 | The OPTS string is a list of characters which are recognized option
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126 | letters, optionally followed by colons, specifying that that letter
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127 | takes an argument, to be placed in `optarg'.
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128 | |||
129 | If a letter in OPTS is followed by two colons, its argument is
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130 | optional. This behavior is specific to the GNU `getopt'.
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131 | |||
132 | The argument `--' causes premature termination of argument
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133 | scanning, explicitly telling `getopt' that there are no more
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134 | options.
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135 | |||
136 | If OPTS begins with `--', then non-option arguments are treated as
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137 | arguments to the option '\0'. This behavior is specific to the GNU
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138 | `getopt'. */
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139 | |||
140 | #if defined __STDC__ && __STDC__
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141 | # ifdef __GNU_LIBRARY__
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142 | /* Many other libraries have conflicting prototypes for getopt, with
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143 | differences in the consts, in stdlib.h. To avoid compilation
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144 | errors, only prototype getopt for the GNU C library. */
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145 | extern int getopt (int __argc, char *const *__argv, const char *__shortopts); |
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146 | # else /* not __GNU_LIBRARY__ */ |
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147 | extern int getopt (); |
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148 | # endif /* __GNU_LIBRARY__ */ |
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149 | |||
150 | # ifndef __need_getopt
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151 | extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts, |
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152 | const struct option *__longopts, int *__longind); |
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153 | extern int getopt_long_only (int __argc, char *const *__argv, |
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154 | const char *__shortopts, |
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155 | const struct option *__longopts, int *__longind); |
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156 | |||
157 | /* Internal only. Users should not call this directly. */
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158 | extern int _getopt_internal (int __argc, char *const *__argv, |
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159 | const char *__shortopts, |
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160 | const struct option *__longopts, int *__longind, |
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161 | int __long_only);
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162 | # endif
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163 | #else /* not __STDC__ */ |
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164 | extern int getopt (); |
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165 | # ifndef __need_getopt
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166 | extern int getopt_long (); |
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167 | extern int getopt_long_only (); |
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168 | |||
169 | extern int _getopt_internal (); |
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170 | # endif
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171 | #endif /* __STDC__ */ |
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172 | |||
173 | #ifdef __cplusplus
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174 | } |
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175 | #endif
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176 | |||
177 | /* Make sure we later can get all the definitions and declarations. */
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178 | #undef __need_getopt
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179 | |||
180 | #endif /* getopt.h */ |