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434
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1 /* Hierarchial argument parsing, layered over getopt.
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2 Copyright (C) 1995-1999, 2003-2010 Free Software Foundation, Inc.
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3 This file is part of the GNU C Library.
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4 Written by Miles Bader <miles@gnu.ai.mit.edu>.
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5
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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18
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19 #ifndef _ARGP_H
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20 #define _ARGP_H
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21
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22 #include <stdio.h>
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23 #include <ctype.h>
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24 #include <getopt.h>
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25 #include <limits.h>
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26
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27 #define __need_error_t
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28 #include <errno.h>
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29
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30 #ifndef __THROW
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31 # define __THROW
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32 #endif
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33 #ifndef __NTH
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34 # define __NTH(fct) fct __THROW
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35 #endif
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36
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37 #ifndef __attribute__
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38 /* This feature is available in gcc versions 2.5 and later. */
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39 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
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40 # define __attribute__(Spec) /* empty */
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41 # endif
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42 /* The __-protected variants of `format' and `printf' attributes
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43 are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
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44 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) || __STRICT_ANSI__
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45 # define __format__ format
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46 # define __printf__ printf
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47 # endif
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48 #endif
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49
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50 /* GCC 2.95 and later have "__restrict"; C99 compilers have
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51 "restrict", and "configure" may have defined "restrict".
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52 Other compilers use __restrict, __restrict__, and _Restrict, and
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53 'configure' might #define 'restrict' to those words. */
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54 #ifndef __restrict
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55 # if ! (2 < __GNUC__ || (2 == __GNUC__ && 95 <= __GNUC_MINOR__))
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56 # if 199901L <= __STDC_VERSION__
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57 # define __restrict restrict
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58 # else
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59 # define __restrict
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60 # endif
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61 # endif
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62 #endif
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63
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64 #ifndef __error_t_defined
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65 typedef int error_t;
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66 # define __error_t_defined
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67 #endif
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68
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69 #ifdef __cplusplus
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70 extern "C" {
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71 #endif
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72
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73 /* A description of a particular option. A pointer to an array of
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74 these is passed in the OPTIONS field of an argp structure. Each option
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75 entry can correspond to one long option and/or one short option; more
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76 names for the same option can be added by following an entry in an option
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77 array with options having the OPTION_ALIAS flag set. */
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78 struct argp_option
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79 {
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80 /* The long option name. For more than one name for the same option, you
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81 can use following options with the OPTION_ALIAS flag set. */
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82 const char *name;
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83
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84 /* What key is returned for this option. If > 0 and printable, then it's
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85 also accepted as a short option. */
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86 int key;
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87
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88 /* If non-NULL, this is the name of the argument associated with this
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89 option, which is required unless the OPTION_ARG_OPTIONAL flag is set. */
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90 const char *arg;
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91
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92 /* OPTION_ flags. */
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93 int flags;
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94
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95 /* The doc string for this option. If both NAME and KEY are 0, This string
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96 will be printed outdented from the normal option column, making it
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97 useful as a group header (it will be the first thing printed in its
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98 group); in this usage, it's conventional to end the string with a `:'.
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99
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100 Write the initial value as N_("TEXT") if you want xgettext to collect
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101 it into a POT file. */
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102 const char *doc;
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103
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104 /* The group this option is in. In a long help message, options are sorted
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105 alphabetically within each group, and the groups presented in the order
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106 0, 1, 2, ..., n, -m, ..., -2, -1. Every entry in an options array with
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107 if this field 0 will inherit the group number of the previous entry, or
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108 zero if it's the first one, unless its a group header (NAME and KEY both
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109 0), in which case, the previous entry + 1 is the default. Automagic
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110 options such as --help are put into group -1. */
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111 int group;
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112 };
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113
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114 /* The argument associated with this option is optional. */
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115 #define OPTION_ARG_OPTIONAL 0x1
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116
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117 /* This option isn't displayed in any help messages. */
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118 #define OPTION_HIDDEN 0x2
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119
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120 /* This option is an alias for the closest previous non-alias option. This
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121 means that it will be displayed in the same help entry, and will inherit
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122 fields other than NAME and KEY from the aliased option. */
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123 #define OPTION_ALIAS 0x4
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124
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125 /* This option isn't actually an option (and so should be ignored by the
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126 actual option parser), but rather an arbitrary piece of documentation that
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127 should be displayed in much the same manner as the options. If this flag
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128 is set, then the option NAME field is displayed unmodified (e.g., no `--'
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129 prefix is added) at the left-margin (where a *short* option would normally
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130 be displayed), and the documentation string in the normal place. The NAME
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131 field will be translated using gettext, unless OPTION_NO_TRANS is set (see
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132 below). For purposes of sorting, any leading whitespace and punctuation is
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133 ignored, except that if the first non-whitespace character is not `-', this
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134 entry is displayed after all options (and OPTION_DOC entries with a leading
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135 `-') in the same group. */
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136 #define OPTION_DOC 0x8
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137
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138 /* This option shouldn't be included in `long' usage messages (but is still
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139 included in help messages). This is mainly intended for options that are
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140 completely documented in an argp's ARGS_DOC field, in which case including
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141 the option in the generic usage list would be redundant. For instance,
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142 if ARGS_DOC is "FOO BAR\n-x BLAH", and the `-x' option's purpose is to
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143 distinguish these two cases, -x should probably be marked
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144 OPTION_NO_USAGE. */
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145 #define OPTION_NO_USAGE 0x10
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146
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147 /* Valid only in conjunction with OPTION_DOC. This option disables translation
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148 of option name. */
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149 #define OPTION_NO_TRANS 0x20
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150
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151
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152 struct argp; /* fwd declare this type */
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153 struct argp_state; /* " */
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154 struct argp_child; /* " */
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155
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156 /* The type of a pointer to an argp parsing function. */
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157 typedef error_t (*argp_parser_t) (int key, char *arg,
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158 struct argp_state *state);
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159
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160 /* What to return for unrecognized keys. For special ARGP_KEY_ keys, such
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161 returns will simply be ignored. For user keys, this error will be turned
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162 into EINVAL (if the call to argp_parse is such that errors are propagated
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163 back to the user instead of exiting); returning EINVAL itself would result
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164 in an immediate stop to parsing in *all* cases. */
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165 #define ARGP_ERR_UNKNOWN E2BIG /* Hurd should never need E2BIG. XXX */
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166
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167 /* Special values for the KEY argument to an argument parsing function.
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168 ARGP_ERR_UNKNOWN should be returned if they aren't understood.
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169
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170 The sequence of keys to a parsing function is either (where each
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171 uppercased word should be prefixed by `ARGP_KEY_' and opt is a user key):
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172
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173 INIT opt... NO_ARGS END SUCCESS -- No non-option arguments at all
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174 or INIT (opt | ARG)... END SUCCESS -- All non-option args parsed
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175 or INIT (opt | ARG)... SUCCESS -- Some non-option arg unrecognized
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176
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177 The third case is where every parser returned ARGP_KEY_UNKNOWN for an
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178 argument, in which case parsing stops at that argument (returning the
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179 unparsed arguments to the caller of argp_parse if requested, or stopping
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180 with an error message if not).
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181
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182 If an error occurs (either detected by argp, or because the parsing
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183 function returned an error value), then the parser is called with
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184 ARGP_KEY_ERROR, and no further calls are made. */
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185
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186 /* This is not an option at all, but rather a command line argument. If a
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187 parser receiving this key returns success, the fact is recorded, and the
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188 ARGP_KEY_NO_ARGS case won't be used. HOWEVER, if while processing the
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189 argument, a parser function decrements the NEXT field of the state it's
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190 passed, the option won't be considered processed; this is to allow you to
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191 actually modify the argument (perhaps into an option), and have it
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192 processed again. */
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193 #define ARGP_KEY_ARG 0
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194 /* There are remaining arguments not parsed by any parser, which may be found
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195 starting at (STATE->argv + STATE->next). If success is returned, but
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196 STATE->next left untouched, it's assumed that all arguments were consume,
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197 otherwise, the parser should adjust STATE->next to reflect any arguments
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198 consumed. */
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199 #define ARGP_KEY_ARGS 0x1000006
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200 /* There are no more command line arguments at all. */
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201 #define ARGP_KEY_END 0x1000001
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202 /* Because it's common to want to do some special processing if there aren't
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203 any non-option args, user parsers are called with this key if they didn't
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204 successfully process any non-option arguments. Called just before
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205 ARGP_KEY_END (where more general validity checks on previously parsed
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206 arguments can take place). */
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207 #define ARGP_KEY_NO_ARGS 0x1000002
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208 /* Passed in before any parsing is done. Afterwards, the values of each
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209 element of the CHILD_INPUT field, if any, in the state structure is
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210 copied to each child's state to be the initial value of the INPUT field. */
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211 #define ARGP_KEY_INIT 0x1000003
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212 /* Use after all other keys, including SUCCESS & END. */
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213 #define ARGP_KEY_FINI 0x1000007
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214 /* Passed in when parsing has successfully been completed (even if there are
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215 still arguments remaining). */
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216 #define ARGP_KEY_SUCCESS 0x1000004
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217 /* Passed in if an error occurs. */
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218 #define ARGP_KEY_ERROR 0x1000005
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219
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220 /* An argp structure contains a set of options declarations, a function to
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221 deal with parsing one, documentation string, a possible vector of child
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222 argp's, and perhaps a function to filter help output. When actually
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223 parsing options, getopt is called with the union of all the argp
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224 structures chained together through their CHILD pointers, with conflicts
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225 being resolved in favor of the first occurrence in the chain. */
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226 struct argp
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227 {
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228 /* An array of argp_option structures, terminated by an entry with both
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229 NAME and KEY having a value of 0. */
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230 const struct argp_option *options;
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231
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232 /* What to do with an option from this structure. KEY is the key
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233 associated with the option, and ARG is any associated argument (NULL if
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234 none was supplied). If KEY isn't understood, ARGP_ERR_UNKNOWN should be
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235 returned. If a non-zero, non-ARGP_ERR_UNKNOWN value is returned, then
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236 parsing is stopped immediately, and that value is returned from
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237 argp_parse(). For special (non-user-supplied) values of KEY, see the
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238 ARGP_KEY_ definitions below. */
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239 argp_parser_t parser;
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240
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241 /* A string describing what other arguments are wanted by this program. It
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242 is only used by argp_usage to print the `Usage:' message. If it
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243 contains newlines, the strings separated by them are considered
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244 alternative usage patterns, and printed on separate lines (lines after
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245 the first are prefix by ` or: ' instead of `Usage:'). */
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246 const char *args_doc;
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247
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248 /* If non-NULL, a string containing extra text to be printed before and
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249 after the options in a long help message (separated by a vertical tab
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250 `\v' character).
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251 Write the initial value as N_("BEFORE-TEXT") "\v" N_("AFTER-TEXT") if
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252 you want xgettext to collect the two pieces of text into a POT file. */
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253 const char *doc;
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254
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255 /* A vector of argp_children structures, terminated by a member with a 0
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256 argp field, pointing to child argps should be parsed with this one. Any
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257 conflicts are resolved in favor of this argp, or early argps in the
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258 CHILDREN list. This field is useful if you use libraries that supply
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259 their own argp structure, which you want to use in conjunction with your
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260 own. */
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261 const struct argp_child *children;
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262
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263 /* If non-zero, this should be a function to filter the output of help
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264 messages. KEY is either a key from an option, in which case TEXT is
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265 that option's help text, or a special key from the ARGP_KEY_HELP_
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266 defines, below, describing which other help text TEXT is. The function
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267 should return either TEXT, if it should be used as-is, a replacement
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268 string, which should be malloced, and will be freed by argp, or NULL,
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269 meaning `print nothing'. The value for TEXT is *after* any translation
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270 has been done, so if any of the replacement text also needs translation,
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271 that should be done by the filter function. INPUT is either the input
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272 supplied to argp_parse, or NULL, if argp_help was called directly. */
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273 char *(*help_filter) (int __key, const char *__text, void *__input);
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274
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275 /* If non-zero the strings used in the argp library are translated using
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276 the domain described by this string. Otherwise the currently installed
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277 default domain is used. */
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278 const char *argp_domain;
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279 };
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280
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281 /* Possible KEY arguments to a help filter function. */
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282 #define ARGP_KEY_HELP_PRE_DOC 0x2000001 /* Help text preceeding options. */
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283 #define ARGP_KEY_HELP_POST_DOC 0x2000002 /* Help text following options. */
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284 #define ARGP_KEY_HELP_HEADER 0x2000003 /* Option header string. */
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285 #define ARGP_KEY_HELP_EXTRA 0x2000004 /* After all other documentation;
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286 TEXT is NULL for this key. */
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287 /* Explanatory note emitted when duplicate option arguments have been
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288 suppressed. */
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289 #define ARGP_KEY_HELP_DUP_ARGS_NOTE 0x2000005
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290 #define ARGP_KEY_HELP_ARGS_DOC 0x2000006 /* Argument doc string. */
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291
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292 /* When an argp has a non-zero CHILDREN field, it should point to a vector of
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293 argp_child structures, each of which describes a subsidiary argp. */
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294 struct argp_child
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295 {
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296 /* The child parser. */
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297 const struct argp *argp;
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298
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299 /* Flags for this child. */
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300 int flags;
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301
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302 /* If non-zero, an optional header to be printed in help output before the
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303 child options. As a side-effect, a non-zero value forces the child
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304 options to be grouped together; to achieve this effect without actually
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305 printing a header string, use a value of "". */
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306 const char *header;
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307
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308 /* Where to group the child options relative to the other (`consolidated')
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309 options in the parent argp; the values are the same as the GROUP field
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310 in argp_option structs, but all child-groupings follow parent options at
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311 a particular group level. If both this field and HEADER are zero, then
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312 they aren't grouped at all, but rather merged with the parent options
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313 (merging the child's grouping levels with the parents). */
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314 int group;
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315 };
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316
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317 /* Parsing state. This is provided to parsing functions called by argp,
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318 which may examine and, as noted, modify fields. */
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319 struct argp_state
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320 {
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321 /* The top level ARGP being parsed. */
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322 const struct argp *root_argp;
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323
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324 /* The argument vector being parsed. May be modified. */
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325 int argc;
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326 char **argv;
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327
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328 /* The index in ARGV of the next arg that to be parsed. May be modified. */
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329 int next;
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330
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331 /* The flags supplied to argp_parse. May be modified. */
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332 unsigned flags;
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333
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334 /* While calling a parsing function with a key of ARGP_KEY_ARG, this is the
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335 number of the current arg, starting at zero, and incremented after each
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336 such call returns. At all other times, this is the number of such
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337 arguments that have been processed. */
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338 unsigned arg_num;
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339
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340 /* If non-zero, the index in ARGV of the first argument following a special
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341 `--' argument (which prevents anything following being interpreted as an
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342 option). Only set once argument parsing has proceeded past this point. */
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343 int quoted;
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344
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345 /* An arbitrary pointer passed in from the user. */
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346 void *input;
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347 /* Values to pass to child parsers. This vector will be the same length as
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348 the number of children for the current parser. */
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349 void **child_inputs;
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350
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351 /* For the parser's use. Initialized to 0. */
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352 void *hook;
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353
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354 /* The name used when printing messages. This is initialized to ARGV[0],
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355 or PROGRAM_INVOCATION_NAME if that is unavailable. */
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356 char *name;
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357
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358 /* Streams used when argp prints something. */
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359 FILE *err_stream; /* For errors; initialized to stderr. */
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360 FILE *out_stream; /* For information; initialized to stdout. */
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361
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362 void *pstate; /* Private, for use by argp. */
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363 };
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364
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365 /* Flags for argp_parse (note that the defaults are those that are
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366 convenient for program command line parsing): */
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367
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368 /* Don't ignore the first element of ARGV. Normally (and always unless
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369 ARGP_NO_ERRS is set) the first element of the argument vector is
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370 skipped for option parsing purposes, as it corresponds to the program name
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371 in a command line. */
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372 #define ARGP_PARSE_ARGV0 0x01
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373
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374 /* Don't print error messages for unknown options to stderr; unless this flag
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375 is set, ARGP_PARSE_ARGV0 is ignored, as ARGV[0] is used as the program
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376 name in the error messages. This flag implies ARGP_NO_EXIT (on the
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377 assumption that silent exiting upon errors is bad behaviour). */
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378 #define ARGP_NO_ERRS 0x02
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379
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380 /* Don't parse any non-option args. Normally non-option args are parsed by
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381 calling the parse functions with a key of ARGP_KEY_ARG, and the actual arg
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382 as the value. Since it's impossible to know which parse function wants to
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383 handle it, each one is called in turn, until one returns 0 or an error
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384 other than ARGP_ERR_UNKNOWN; if an argument is handled by no one, the
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385 argp_parse returns prematurely (but with a return value of 0). If all
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386 args have been parsed without error, all parsing functions are called one
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387 last time with a key of ARGP_KEY_END. This flag needn't normally be set,
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388 as the normal behavior is to stop parsing as soon as some argument can't
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389 be handled. */
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390 #define ARGP_NO_ARGS 0x04
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391
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392 /* Parse options and arguments in the same order they occur on the command
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393 line -- normally they're rearranged so that all options come first. */
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394 #define ARGP_IN_ORDER 0x08
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395
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396 /* Don't provide the standard long option --help, which causes usage and
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397 option help information to be output to stdout, and exit (0) called. */
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398 #define ARGP_NO_HELP 0x10
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399
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400 /* Don't exit on errors (they may still result in error messages). */
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401 #define ARGP_NO_EXIT 0x20
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402
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403 /* Use the gnu getopt `long-only' rules for parsing arguments. */
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404 #define ARGP_LONG_ONLY 0x40
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405
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406 /* Turns off any message-printing/exiting options. */
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407 #define ARGP_SILENT (ARGP_NO_EXIT | ARGP_NO_ERRS | ARGP_NO_HELP)
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408
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409 /* Parse the options strings in ARGC & ARGV according to the options in ARGP.
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410 FLAGS is one of the ARGP_ flags above. If ARG_INDEX is non-NULL, the
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411 index in ARGV of the first unparsed option is returned in it. If an
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412 unknown option is present, ARGP_ERR_UNKNOWN is returned; if some parser
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413 routine returned a non-zero value, it is returned; otherwise 0 is
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414 returned. This function may also call exit unless the ARGP_NO_HELP flag
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415 is set. INPUT is a pointer to a value to be passed in to the parser. */
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416 extern error_t argp_parse (const struct argp *__restrict __argp,
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417 int /*argc*/, char **__restrict /*argv*/,
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418 unsigned __flags, int *__restrict __arg_index,
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419 void *__restrict __input);
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420 extern error_t __argp_parse (const struct argp *__restrict __argp,
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421 int /*argc*/, char **__restrict /*argv*/,
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422 unsigned __flags, int *__restrict __arg_index,
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423 void *__restrict __input);
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424
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|
425 /* Global variables. */
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426
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|
427 /* GNULIB makes sure both program_invocation_name and
|
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428 program_invocation_short_name are available */
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|
|
429 #ifdef GNULIB_PROGRAM_INVOCATION_NAME
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|
430 extern char *program_invocation_name;
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|
|
431 # undef HAVE_DECL_PROGRAM_INVOCATION_NAME
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|
432 # define HAVE_DECL_PROGRAM_INVOCATION_NAME 1
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|
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433 #endif
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434
|
|
|
435 #ifdef GNULIB_PROGRAM_INVOCATION_SHORT_NAME
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|
|
436 extern char *program_invocation_short_name;
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|
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437 # undef HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
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|
438 # define HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME 1
|
|
|
439 #endif
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440
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|
441 /* If defined or set by the user program to a non-zero value, then a default
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442 option --version is added (unless the ARGP_NO_HELP flag is used), which
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|
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443 will print this string followed by a newline and exit (unless the
|
|
|
444 ARGP_NO_EXIT flag is used). Overridden by ARGP_PROGRAM_VERSION_HOOK. */
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|
|
445 extern const char *argp_program_version;
|
|
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446
|
|
|
447 /* If defined or set by the user program to a non-zero value, then a default
|
|
|
448 option --version is added (unless the ARGP_NO_HELP flag is used), which
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|
|
449 calls this function with a stream to print the version to and a pointer to
|
|
|
450 the current parsing state, and then exits (unless the ARGP_NO_EXIT flag is
|
|
|
451 used). This variable takes precedent over ARGP_PROGRAM_VERSION. */
|
|
|
452 extern void (*argp_program_version_hook) (FILE *__restrict __stream,
|
|
|
453 struct argp_state *__restrict
|
|
|
454 __state);
|
|
|
455
|
|
|
456 /* If defined or set by the user program, it should point to string that is
|
|
|
457 the bug-reporting address for the program. It will be printed by
|
|
|
458 argp_help if the ARGP_HELP_BUG_ADDR flag is set (as it is by various
|
|
|
459 standard help messages), embedded in a sentence that says something like
|
|
|
460 `Report bugs to ADDR.'. */
|
|
|
461 extern const char *argp_program_bug_address;
|
|
|
462
|
|
|
463 /* The exit status that argp will use when exiting due to a parsing error.
|
|
|
464 If not defined or set by the user program, this defaults to EX_USAGE from
|
|
|
465 <sysexits.h>. */
|
|
|
466 extern error_t argp_err_exit_status;
|
|
|
467
|
|
|
468 /* Flags for argp_help. */
|
|
|
469 #define ARGP_HELP_USAGE 0x01 /* a Usage: message. */
|
|
|
470 #define ARGP_HELP_SHORT_USAGE 0x02 /* " but don't actually print options. */
|
|
|
471 #define ARGP_HELP_SEE 0x04 /* a `Try ... for more help' message. */
|
|
|
472 #define ARGP_HELP_LONG 0x08 /* a long help message. */
|
|
|
473 #define ARGP_HELP_PRE_DOC 0x10 /* doc string preceding long help. */
|
|
|
474 #define ARGP_HELP_POST_DOC 0x20 /* doc string following long help. */
|
|
|
475 #define ARGP_HELP_DOC (ARGP_HELP_PRE_DOC | ARGP_HELP_POST_DOC)
|
|
|
476 #define ARGP_HELP_BUG_ADDR 0x40 /* bug report address */
|
|
|
477 #define ARGP_HELP_LONG_ONLY 0x80 /* modify output appropriately to
|
|
|
478 reflect ARGP_LONG_ONLY mode. */
|
|
|
479
|
|
|
480 /* These ARGP_HELP flags are only understood by argp_state_help. */
|
|
|
481 #define ARGP_HELP_EXIT_ERR 0x100 /* Call exit(1) instead of returning. */
|
|
|
482 #define ARGP_HELP_EXIT_OK 0x200 /* Call exit(0) instead of returning. */
|
|
|
483
|
|
|
484 /* The standard thing to do after a program command line parsing error, if an
|
|
|
485 error message has already been printed. */
|
|
|
486 #define ARGP_HELP_STD_ERR \
|
|
|
487 (ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR)
|
|
|
488 /* The standard thing to do after a program command line parsing error, if no
|
|
|
489 more specific error message has been printed. */
|
|
|
490 #define ARGP_HELP_STD_USAGE \
|
|
|
491 (ARGP_HELP_SHORT_USAGE | ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR)
|
|
|
492 /* The standard thing to do in response to a --help option. */
|
|
|
493 #define ARGP_HELP_STD_HELP \
|
|
|
494 (ARGP_HELP_SHORT_USAGE | ARGP_HELP_LONG | ARGP_HELP_EXIT_OK \
|
|
|
495 | ARGP_HELP_DOC | ARGP_HELP_BUG_ADDR)
|
|
|
496
|
|
|
497 /* Output a usage message for ARGP to STREAM. FLAGS are from the set
|
|
|
498 ARGP_HELP_*. */
|
|
|
499 extern void argp_help (const struct argp *__restrict __argp,
|
|
|
500 FILE *__restrict __stream,
|
|
|
501 unsigned __flags, char *__restrict __name);
|
|
|
502 extern void __argp_help (const struct argp *__restrict __argp,
|
|
|
503 FILE *__restrict __stream, unsigned __flags,
|
|
|
504 char *__name);
|
|
|
505
|
|
|
506 /* The following routines are intended to be called from within an argp
|
|
|
507 parsing routine (thus taking an argp_state structure as the first
|
|
|
508 argument). They may or may not print an error message and exit, depending
|
|
|
509 on the flags in STATE -- in any case, the caller should be prepared for
|
|
|
510 them *not* to exit, and should return an appropiate error after calling
|
|
|
511 them. [argp_usage & argp_error should probably be called argp_state_...,
|
|
|
512 but they're used often enough that they should be short] */
|
|
|
513
|
|
|
514 /* Output, if appropriate, a usage message for STATE to STREAM. FLAGS are
|
|
|
515 from the set ARGP_HELP_*. */
|
|
|
516 extern void argp_state_help (const struct argp_state *__restrict __state,
|
|
|
517 FILE *__restrict __stream,
|
|
|
518 unsigned int __flags);
|
|
|
519 extern void __argp_state_help (const struct argp_state *__restrict __state,
|
|
|
520 FILE *__restrict __stream,
|
|
|
521 unsigned int __flags);
|
|
|
522
|
|
|
523 #if _LIBC || !defined __USE_EXTERN_INLINES
|
|
|
524 /* Possibly output the standard usage message for ARGP to stderr and exit. */
|
|
|
525 extern void argp_usage (const struct argp_state *__state);
|
|
|
526 extern void __argp_usage (const struct argp_state *__state);
|
|
|
527 #endif
|
|
|
528
|
|
|
529 /* If appropriate, print the printf string FMT and following args, preceded
|
|
|
530 by the program name and `:', to stderr, and followed by a `Try ... --help'
|
|
|
531 message, then exit (1). */
|
|
|
532 extern void argp_error (const struct argp_state *__restrict __state,
|
|
|
533 const char *__restrict __fmt, ...)
|
|
|
534 __attribute__ ((__format__ (__printf__, 2, 3)));
|
|
|
535 extern void __argp_error (const struct argp_state *__restrict __state,
|
|
|
536 const char *__restrict __fmt, ...)
|
|
|
537 __attribute__ ((__format__ (__printf__, 2, 3)));
|
|
|
538
|
|
|
539 /* Similar to the standard gnu error-reporting function error(), but will
|
|
|
540 respect the ARGP_NO_EXIT and ARGP_NO_ERRS flags in STATE, and will print
|
|
|
541 to STATE->err_stream. This is useful for argument parsing code that is
|
|
|
542 shared between program startup (when exiting is desired) and runtime
|
|
|
543 option parsing (when typically an error code is returned instead). The
|
|
|
544 difference between this function and argp_error is that the latter is for
|
|
|
545 *parsing errors*, and the former is for other problems that occur during
|
|
|
546 parsing but don't reflect a (syntactic) problem with the input. */
|
|
|
547 extern void argp_failure (const struct argp_state *__restrict __state,
|
|
|
548 int __status, int __errnum,
|
|
|
549 const char *__restrict __fmt, ...)
|
|
|
550 __attribute__ ((__format__ (__printf__, 4, 5)));
|
|
|
551 extern void __argp_failure (const struct argp_state *__restrict __state,
|
|
|
552 int __status, int __errnum,
|
|
|
553 const char *__restrict __fmt, ...)
|
|
|
554 __attribute__ ((__format__ (__printf__, 4, 5)));
|
|
|
555
|
|
|
556 #if _LIBC || !defined __USE_EXTERN_INLINES
|
|
|
557 /* Returns true if the option OPT is a valid short option. */
|
|
|
558 extern int _option_is_short (const struct argp_option *__opt) __THROW;
|
|
|
559 extern int __option_is_short (const struct argp_option *__opt) __THROW;
|
|
|
560
|
|
|
561 /* Returns true if the option OPT is in fact the last (unused) entry in an
|
|
|
562 options array. */
|
|
|
563 extern int _option_is_end (const struct argp_option *__opt) __THROW;
|
|
|
564 extern int __option_is_end (const struct argp_option *__opt) __THROW;
|
|
|
565 #endif
|
|
|
566
|
|
|
567 /* Return the input field for ARGP in the parser corresponding to STATE; used
|
|
|
568 by the help routines. */
|
|
|
569 extern void *_argp_input (const struct argp *__restrict __argp,
|
|
|
570 const struct argp_state *__restrict __state)
|
|
|
571 __THROW;
|
|
|
572 extern void *__argp_input (const struct argp *__restrict __argp,
|
|
|
573 const struct argp_state *__restrict __state)
|
|
|
574 __THROW;
|
|
|
575
|
|
|
576 #ifdef __USE_EXTERN_INLINES
|
|
|
577
|
|
|
578 # if !_LIBC
|
|
|
579 # define __argp_usage argp_usage
|
|
|
580 # define __argp_state_help argp_state_help
|
|
|
581 # define __option_is_short _option_is_short
|
|
|
582 # define __option_is_end _option_is_end
|
|
|
583 # endif
|
|
|
584
|
|
|
585 # ifndef ARGP_EI
|
|
|
586 # ifdef __GNUC__
|
|
|
587 /* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
|
|
|
588 inline semantics, unless -fgnu89-inline is used. It defines a macro
|
|
|
589 __GNUC_STDC_INLINE__ to indicate this situation or a macro
|
|
|
590 __GNUC_GNU_INLINE__ to indicate the opposite situation.
|
|
|
591 GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline
|
|
|
592 semantics but warns, unless -fgnu89-inline is used:
|
|
|
593 warning: C99 inline functions are not supported; using GNU89
|
|
|
594 warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute
|
|
|
595 It defines a macro __GNUC_GNU_INLINE__ to indicate this situation. */
|
|
|
596 # if defined __GNUC_STDC_INLINE__
|
|
|
597 # define ARGP_EI __inline__
|
|
|
598 # elif defined __GNUC_GNU_INLINE__
|
|
|
599 # define ARGP_EI extern __inline__ __attribute__ ((__gnu_inline__))
|
|
|
600 # else
|
|
|
601 # define ARGP_EI extern __inline__
|
|
|
602 # endif
|
|
|
603 # else
|
|
|
604 /* With other compilers, assume the ISO C99 meaning of 'inline', if
|
|
|
605 the compiler supports 'inline' at all. */
|
|
|
606 # define ARGP_EI inline
|
|
|
607 # endif
|
|
|
608 # endif
|
|
|
609
|
|
|
610 ARGP_EI void
|
|
|
611 __argp_usage (const struct argp_state *__state)
|
|
|
612 {
|
|
|
613 __argp_state_help (__state, stderr, ARGP_HELP_STD_USAGE);
|
|
|
614 }
|
|
|
615
|
|
|
616 ARGP_EI int
|
|
|
617 __NTH (__option_is_short (const struct argp_option *__opt))
|
|
|
618 {
|
|
|
619 if (__opt->flags & OPTION_DOC)
|
|
|
620 return 0;
|
|
|
621 else
|
|
|
622 {
|
|
|
623 int __key = __opt->key;
|
|
|
624 return __key > 0 && __key <= UCHAR_MAX && isprint (__key);
|
|
|
625 }
|
|
|
626 }
|
|
|
627
|
|
|
628 ARGP_EI int
|
|
|
629 __NTH (__option_is_end (const struct argp_option *__opt))
|
|
|
630 {
|
|
|
631 return !__opt->key && !__opt->name && !__opt->doc && !__opt->group;
|
|
|
632 }
|
|
|
633
|
|
|
634 # if !_LIBC
|
|
|
635 # undef __argp_usage
|
|
|
636 # undef __argp_state_help
|
|
|
637 # undef __option_is_short
|
|
|
638 # undef __option_is_end
|
|
|
639 # endif
|
|
|
640 #endif /* Use extern inlines. */
|
|
|
641
|
|
|
642 #ifdef __cplusplus
|
|
|
643 }
|
|
|
644 #endif
|
|
|
645
|
|
|
646 #endif /* argp.h */
|
