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diff --git a/include/argot/opt.h b/include/argot/opt.h
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+/* argot - Gray's Extensible Configuration System
+ Copyright (C) 2007-2016 Sergey Poznyakoff
+
+ Grecs is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 3 of the License, or (at your
+ option) any later version.
+
+ Grecs is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with Grecs. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _ARGOT_OPT_H
+#define _ARGOT_OPT_H
+
+struct argot_proginfo {
+ const char *progname;
+ char **subcmd;
+ const char *docstring;
+ const char *args_doc;
+ struct argot_opthelp *opthelp;
+ size_t optcount;
+ void (*print_help_hook)(FILE *stream);
+ void (*print_version_hook)(FILE *stream);
+ const char *package;
+ const char *version;
+ const char *license;
+ const char *copyright_year;
+ const char *copyright_holder;
+ const char **authors;
+ const char *bug_address;
+ const char *url;
+ const char *epilogue;
+};
+
+struct argot_opthelp {
+ const char *opt;
+ const char *arg;
+ int is_optional;
+ const char *descr;
+};
+
+#define DESCRCOLUMN 30
+#define RMARGIN 79
+#define GROUPCOLUMN 2
+#define USAGECOLUMN 13
+
+void argot_print_help(struct argot_proginfo *pinfo);
+void argot_print_usage(struct argot_proginfo *pinfo);
+void argot_print_version_only(struct argot_proginfo *pinfo, FILE *stream);
+void argot_print_version(struct argot_proginfo *pinfo, FILE *stream);
+
+#endif
+

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