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1 /* Declarations for getopt. |
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2 Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc. |
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3 |
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4 This file is part of the GNU C Library. Its master source is NOT part of |
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5 the C library, however. The master source lives in /gd/gnu/lib. |
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6 |
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7 The GNU C Library is free software; you can redistribute it and/or |
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8 modify it under the terms of the GNU Library General Public License as |
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9 published by the Free Software Foundation; either version 2 of the |
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10 License, or (at your option) any later version. |
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11 |
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12 The GNU C Library is distributed in the hope that it will be useful, |
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 Library General Public License for more details. |
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16 |
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17 You should have received a copy of the GNU Library General Public |
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18 License along with the GNU C Library; see the file COPYING.LIB. If not, |
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19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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20 Boston, MA 02111-1307, USA. */ |
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21 |
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22 #ifndef _GETOPT_H |
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23 #define _GETOPT_H 1 |
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24 |
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25 #if !defined(WIN32) || (defined(_DLL) && !defined(_IMPORT)) || !defined(_DLL) |
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26 #define DllImport |
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27 #else |
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28 #define DllImport __declspec(dllimport) |
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29 #endif |
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30 |
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31 #ifdef __cplusplus |
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32 extern "C" { |
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33 #endif |
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34 |
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35 /* For communication from `getopt' to the caller. |
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36 When `getopt' finds an option that takes an argument, |
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37 the argument value is returned here. |
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38 Also, when `ordering' is RETURN_IN_ORDER, |
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39 each non-option ARGV-element is returned here. */ |
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40 |
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41 extern DllImport char *optarg; |
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42 |
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43 /* Index in ARGV of the next element to be scanned. |
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44 This is used for communication to and from the caller |
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45 and for communication between successive calls to `getopt'. |
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46 |
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47 On entry to `getopt', zero means this is the first call; initialize. |
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48 |
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49 When `getopt' returns -1, this is the index of the first of the |
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50 non-option elements that the caller should itself scan. |
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51 |
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52 Otherwise, `optind' communicates from one call to the next |
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53 how much of ARGV has been scanned so far. */ |
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54 |
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55 extern DllImport int optind; |
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56 |
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57 /* Callers store zero here to inhibit the error message `getopt' prints |
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58 for unrecognized options. */ |
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59 |
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60 extern DllImport int opterr; |
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61 |
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62 /* Set to an option character which was unrecognized. */ |
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63 |
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64 extern DllImport int optopt; |
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65 |
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66 /* Describe the long-named options requested by the application. |
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67 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector |
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68 of `struct option' terminated by an element containing a name which is |
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69 zero. |
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70 |
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71 The field `has_arg' is: |
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72 no_argument (or 0) if the option does not take an argument, |
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73 required_argument (or 1) if the option requires an argument, |
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74 optional_argument (or 2) if the option takes an optional argument. |
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75 |
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76 If the field `flag' is not NULL, it points to a variable that is set |
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77 to the value given in the field `val' when the option is found, but |
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78 left unchanged if the option is not found. |
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79 |
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80 To have a long-named option do something other than set an `int' to |
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81 a compiled-in constant, such as set a value from `optarg', set the |
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82 option's `flag' field to zero and its `val' field to a nonzero |
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83 value (the equivalent single-letter option character, if there is |
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84 one). For long options that have a zero `flag' field, `getopt' |
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85 returns the contents of the `val' field. */ |
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86 |
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87 struct option |
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88 { |
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89 #if defined (__STDC__) && __STDC__ |
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90 const char *name; |
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91 #else |
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92 char *name; |
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93 #endif |
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94 /* has_arg can't be an enum because some compilers complain about |
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95 type mismatches in all the code that assumes it is an int. */ |
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96 int has_arg; |
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97 int *flag; |
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98 int val; |
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99 }; |
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100 |
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101 /* Names for the values of the `has_arg' field of `struct option'. */ |
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102 |
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103 #define no_argument 0 |
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104 #define required_argument 1 |
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105 #define optional_argument 2 |
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106 |
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107 #if defined (__STDC__) && __STDC__ |
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108 #ifdef __GNU_LIBRARY__ |
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109 /* Many other libraries have conflicting prototypes for getopt, with |
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110 differences in the consts, in stdlib.h. To avoid compilation |
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111 errors, only prototype getopt for the GNU C library. */ |
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112 extern int getopt (int argc, char *const *argv, const char *shortopts); |
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113 #else /* not __GNU_LIBRARY__ */ |
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114 extern int getopt (); |
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115 #endif /* __GNU_LIBRARY__ */ |
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116 extern int getopt_long (int argc, char *const *argv, const char *shortopts, |
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117 const struct option *longopts, int *longind); |
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118 extern int getopt_long_only (int argc, char *const *argv, |
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119 const char *shortopts, |
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120 const struct option *longopts, int *longind); |
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121 |
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122 /* Internal only. Users should not call this directly. */ |
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123 extern int _getopt_internal (int argc, char *const *argv, |
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124 const char *shortopts, |
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125 const struct option *longopts, int *longind, |
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126 int long_only); |
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127 #else /* not __STDC__ */ |
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128 extern int getopt (); |
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129 extern int getopt_long (); |
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130 extern int getopt_long_only (); |
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131 |
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132 extern int _getopt_internal (); |
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133 #endif /* __STDC__ */ |
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134 |
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135 #ifdef __cplusplus |
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136 } |
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137 #endif |
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138 |
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139 #endif /* _GETOPT_H */ |
