path: root/contrib/argp-standalone/argp.h
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+/* Hierarchial argument parsing.
+ Copyright (C) 1995, 96, 97, 98, 99, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Written by Miles Bader <>.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ Library General Public License for more details.
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+#ifndef _ARGP_H
+#define _ARGP_H
+#include <stdio.h>
+#include <ctype.h>
+#define __need_error_t
+#include <errno.h>
+#ifndef __THROW
+# define __THROW
+#ifndef __const
+# define __const const
+#ifndef __error_t_defined
+typedef int error_t;
+# define __error_t_defined
+/* FIXME: What's the right way to check for __restrict? Sun's cc seems
+ not to have it. Perhaps it's easiest to just delete the use of
+ __restrict from the prototypes. */
+#ifndef __restrict
+# ifndef __GNUC___
+# define __restrict
+# endif
+/* NOTE: We can't use the autoconf tests, since this is supposed to be
+ an installed header file and argp's config.h is of course not
+ installed. */
+# if __GNUC__ >= 2
+# define PRINTF_STYLE(f, a) __attribute__ ((__format__ (__printf__, f, a)))
+# else
+# define PRINTF_STYLE(f, a)
+# endif
+#ifdef __cplusplus
+extern "C" {
+/* A description of a particular option. A pointer to an array of
+ these is passed in the OPTIONS field of an argp structure. Each option
+ entry can correspond to one long option and/or one short option; more
+ names for the same option can be added by following an entry in an option
+ array with options having the OPTION_ALIAS flag set. */
+struct argp_option
+ /* The long option name. For more than one name for the same option, you
+ can use following options with the OPTION_ALIAS flag set. */
+ __const char *name;
+ /* What key is returned for this option. If > 0 and printable, then it's
+ also accepted as a short option. */
+ int key;
+ /* If non-NULL, this is the name of the argument associated with this
+ option, which is required unless the OPTION_ARG_OPTIONAL flag is set. */
+ __const char *arg;
+ /* OPTION_ flags. */
+ int flags;
+ /* The doc string for this option. If both NAME and KEY are 0, This string
+ will be printed outdented from the normal option column, making it
+ useful as a group header (it will be the first thing printed in its
+ group); in this usage, it's conventional to end the string with a `:'. */
+ __const char *doc;
+ /* The group this option is in. In a long help message, options are sorted
+ alphabetically within each group, and the groups presented in the order
+ 0, 1, 2, ..., n, -m, ..., -2, -1. Every entry in an options array with
+ if this field 0 will inherit the group number of the previous entry, or
+ zero if it's the first one, unless its a group header (NAME and KEY both
+ 0), in which case, the previous entry + 1 is the default. Automagic
+ options such as --help are put into group -1. */
+ int group;
+/* The argument associated with this option is optional. */
+/* This option isn't displayed in any help messages. */
+#define OPTION_HIDDEN 0x2
+/* This option is an alias for the closest previous non-alias option. This
+ means that it will be displayed in the same help entry, and will inherit
+ fields other than NAME and KEY from the aliased option. */
+#define OPTION_ALIAS 0x4
+/* This option isn't actually an option (and so should be ignored by the
+ actual option parser), but rather an arbitrary piece of documentation that
+ should be displayed in much the same manner as the options. If this flag
+ is set, then the option NAME field is displayed unmodified (e.g., no `--'
+ prefix is added) at the left-margin (where a *short* option would normally
+ be displayed), and the documentation string in the normal place. For
+ purposes of sorting, any leading whitespace and puncuation is ignored,
+ except that if the first non-whitespace character is not `-', this entry
+ is displayed after all options (and OPTION_DOC entries with a leading `-')
+ in the same group. */
+#define OPTION_DOC 0x8
+/* This option shouldn't be included in `long' usage messages (but is still
+ included in help messages). This is mainly intended for options that are
+ completely documented in an argp's ARGS_DOC field, in which case including
+ the option in the generic usage list would be redundant. For instance,
+ if ARGS_DOC is "FOO BAR\n-x BLAH", and the `-x' option's purpose is to
+ distinguish these two cases, -x should probably be marked
+#define OPTION_NO_USAGE 0x10
+struct argp; /* fwd declare this type */
+struct argp_state; /* " */
+struct argp_child; /* " */
+/* The type of a pointer to an argp parsing function. */
+typedef error_t (*argp_parser_t) (int key, char *arg,
+ struct argp_state *state);
+/* What to return for unrecognized keys. For special ARGP_KEY_ keys, such
+ returns will simply be ignored. For user keys, this error will be turned
+ into EINVAL (if the call to argp_parse is such that errors are propagated
+ back to the user instead of exiting); returning EINVAL itself would result
+ in an immediate stop to parsing in *all* cases. */
+#define ARGP_ERR_UNKNOWN E2BIG /* Hurd should never need E2BIG. XXX */
+/* Special values for the KEY argument to an argument parsing function.
+ ARGP_ERR_UNKNOWN should be returned if they aren't understood.
+ The sequence of keys to a parsing function is either (where each
+ uppercased word should be prefixed by `ARGP_KEY_' and opt is a user key):
+ INIT opt... NO_ARGS END SUCCESS -- No non-option arguments at all
+ or INIT (opt | ARG)... END SUCCESS -- All non-option args parsed
+ or INIT (opt | ARG)... SUCCESS -- Some non-option arg unrecognized
+ The third case is where every parser returned ARGP_KEY_UNKNOWN for an
+ argument, in which case parsing stops at that argument (returning the
+ unparsed arguments to the caller of argp_parse if requested, or stopping
+ with an error message if not).
+ If an error occurs (either detected by argp, or because the parsing
+ function returned an error value), then the parser is called with
+ ARGP_KEY_ERROR, and no further calls are made. */
+/* This is not an option at all, but rather a command line argument. If a
+ parser receiving this key returns success, the fact is recorded, and the
+ ARGP_KEY_NO_ARGS case won't be used. HOWEVER, if while processing the
+ argument, a parser function decrements the NEXT field of the state it's
+ passed, the option won't be considered processed; this is to allow you to
+ actually modify the argument (perhaps into an option), and have it
+ processed again. */
+#define ARGP_KEY_ARG 0
+/* There are remaining arguments not parsed by any parser, which may be found
+ starting at (STATE->argv + STATE->next). If success is returned, but
+ STATE->next left untouched, it's assumed that all arguments were consume,
+ otherwise, the parser should adjust STATE->next to reflect any arguments
+ consumed. */
+#define ARGP_KEY_ARGS 0x1000006
+/* There are no more command line arguments at all. */
+#define ARGP_KEY_END 0x1000001
+/* Because it's common to want to do some special processing if there aren't
+ any non-option args, user parsers are called with this key if they didn't
+ successfully process any non-option arguments. Called just before
+ ARGP_KEY_END (where more general validity checks on previously parsed
+ arguments can take place). */
+#define ARGP_KEY_NO_ARGS 0x1000002
+/* Passed in before any parsing is done. Afterwards, the values of each
+ element of the CHILD_INPUT field, if any, in the state structure is
+ copied to each child's state to be the initial value of the INPUT field. */
+#define ARGP_KEY_INIT 0x1000003
+/* Use after all other keys, including SUCCESS & END. */
+#define ARGP_KEY_FINI 0x1000007
+/* Passed in when parsing has successfully been completed (even if there are
+ still arguments remaining). */
+#define ARGP_KEY_SUCCESS 0x1000004
+/* Passed in if an error occurs. */
+#define ARGP_KEY_ERROR 0x1000005
+/* An argp structure contains a set of options declarations, a function to
+ deal with parsing one, documentation string, a possible vector of child
+ argp's, and perhaps a function to filter help output. When actually
+ parsing options, getopt is called with the union of all the argp
+ structures chained together through their CHILD pointers, with conflicts
+ being resolved in favor of the first occurrence in the chain. */
+struct argp
+ /* An array of argp_option structures, terminated by an entry with both
+ NAME and KEY having a value of 0. */
+ __const struct argp_option *options;
+ /* What to do with an option from this structure. KEY is the key
+ associated with the option, and ARG is any associated argument (NULL if
+ none was supplied). If KEY isn't understood, ARGP_ERR_UNKNOWN should be
+ returned. If a non-zero, non-ARGP_ERR_UNKNOWN value is returned, then
+ parsing is stopped immediately, and that value is returned from
+ argp_parse(). For special (non-user-supplied) values of KEY, see the
+ ARGP_KEY_ definitions below. */
+ argp_parser_t parser;
+ /* A string describing what other arguments are wanted by this program. It
+ is only used by argp_usage to print the `Usage:' message. If it
+ contains newlines, the strings separated by them are considered
+ alternative usage patterns, and printed on separate lines (lines after
+ the first are prefix by ` or: ' instead of `Usage:'). */
+ __const char *args_doc;
+ /* If non-NULL, a string containing extra text to be printed before and
+ after the options in a long help message (separated by a vertical tab
+ `\v' character). */
+ __const char *doc;
+ /* A vector of argp_children structures, terminated by a member with a 0
+ argp field, pointing to child argps should be parsed with this one. Any
+ conflicts are resolved in favor of this argp, or early argps in the
+ CHILDREN list. This field is useful if you use libraries that supply
+ their own argp structure, which you want to use in conjunction with your
+ own. */
+ __const struct argp_child *children;
+ /* If non-zero, this should be a function to filter the output of help
+ messages. KEY is either a key from an option, in which case TEXT is
+ that option's help text, or a special key from the ARGP_KEY_HELP_
+ defines, below, describing which other help text TEXT is. The function
+ should return either TEXT, if it should be used as-is, a replacement
+ string, which should be malloced, and will be freed by argp, or NULL,
+ meaning `print nothing'. The value for TEXT is *after* any translation
+ has been done, so if any of the replacement text also needs translation,
+ that should be done by the filter function. INPUT is either the input
+ supplied to argp_parse, or NULL, if argp_help was called directly. */
+ char *(*help_filter) (int __key, __const char *__text, void *__input);
+ /* If non-zero the strings used in the argp library are translated using
+ the domain described by this string. Otherwise the currently installed
+ default domain is used. */
+ const char *argp_domain;
+/* Possible KEY arguments to a help filter function. */
+#define ARGP_KEY_HELP_PRE_DOC 0x2000001 /* Help text preceeding options. */
+#define ARGP_KEY_HELP_POST_DOC 0x2000002 /* Help text following options. */
+#define ARGP_KEY_HELP_HEADER 0x2000003 /* Option header string. */
+#define ARGP_KEY_HELP_EXTRA 0x2000004 /* After all other documentation;
+ TEXT is NULL for this key. */
+/* Explanatory note emitted when duplicate option arguments have been
+ suppressed. */
+#define ARGP_KEY_HELP_DUP_ARGS_NOTE 0x2000005
+#define ARGP_KEY_HELP_ARGS_DOC 0x2000006 /* Argument doc string. */
+/* When an argp has a non-zero CHILDREN field, it should point to a vector of
+ argp_child structures, each of which describes a subsidiary argp. */
+struct argp_child
+ /* The child parser. */
+ __const struct argp *argp;
+ /* Flags for this child. */
+ int flags;
+ /* If non-zero, an optional header to be printed in help output before the
+ child options. As a side-effect, a non-zero value forces the child
+ options to be grouped together; to achieve this effect without actually
+ printing a header string, use a value of "". */
+ __const char *header;
+ /* Where to group the child options relative to the other (`consolidated')
+ options in the parent argp; the values are the same as the GROUP field
+ in argp_option structs, but all child-groupings follow parent options at
+ a particular group level. If both this field and HEADER are zero, then
+ they aren't grouped at all, but rather merged with the parent options
+ (merging the child's grouping levels with the parents). */
+ int group;
+/* Parsing state. This is provided to parsing functions called by argp,
+ which may examine and, as noted, modify fields. */
+struct argp_state
+ /* The top level ARGP being parsed. */
+ __const struct argp *root_argp;
+ /* The argument vector being parsed. May be modified. */
+ int argc;
+ char **argv;
+ /* The index in ARGV of the next arg that to be parsed. May be modified. */
+ int next;
+ /* The flags supplied to argp_parse. May be modified. */
+ unsigned flags;
+ /* While calling a parsing function with a key of ARGP_KEY_ARG, this is the
+ number of the current arg, starting at zero, and incremented after each
+ such call returns. At all other times, this is the number of such
+ arguments that have been processed. */
+ unsigned arg_num;
+ /* If non-zero, the index in ARGV of the first argument following a special
+ `--' argument (which prevents anything following being interpreted as an
+ option). Only set once argument parsing has proceeded past this point. */
+ int quoted;
+ /* An arbitrary pointer passed in from the user. */
+ void *input;
+ /* Values to pass to child parsers. This vector will be the same length as
+ the number of children for the current parser. */
+ void **child_inputs;
+ /* For the parser's use. Initialized to 0. */
+ void *hook;
+ /* The name used when printing messages. This is initialized to ARGV[0],
+ or PROGRAM_INVOCATION_NAME if that is unavailable. */
+ char *name;
+ /* Streams used when argp prints something. */
+ FILE *err_stream; /* For errors; initialized to stderr. */
+ FILE *out_stream; /* For information; initialized to stdout. */
+ void *pstate; /* Private, for use by argp. */
+/* Flags for argp_parse (note that the defaults are those that are
+ convenient for program command line parsing): */
+/* Don't ignore the first element of ARGV. Normally (and always unless
+ ARGP_NO_ERRS is set) the first element of the argument vector is
+ skipped for option parsing purposes, as it corresponds to the program name
+ in a command line. */
+#define ARGP_PARSE_ARGV0 0x01
+/* Don't print error messages for unknown options to stderr; unless this flag
+ is set, ARGP_PARSE_ARGV0 is ignored, as ARGV[0] is used as the program
+ name in the error messages. This flag implies ARGP_NO_EXIT (on the
+ assumption that silent exiting upon errors is bad behaviour). */
+#define ARGP_NO_ERRS 0x02
+/* Don't parse any non-option args. Normally non-option args are parsed by
+ calling the parse functions with a key of ARGP_KEY_ARG, and the actual arg
+ as the value. Since it's impossible to know which parse function wants to
+ handle it, each one is called in turn, until one returns 0 or an error
+ other than ARGP_ERR_UNKNOWN; if an argument is handled by no one, the
+ argp_parse returns prematurely (but with a return value of 0). If all
+ args have been parsed without error, all parsing functions are called one
+ last time with a key of ARGP_KEY_END. This flag needn't normally be set,
+ as the normal behavior is to stop parsing as soon as some argument can't
+ be handled. */
+#define ARGP_NO_ARGS 0x04
+/* Parse options and arguments in the same order they occur on the command
+ line -- normally they're rearranged so that all options come first. */
+#define ARGP_IN_ORDER 0x08
+/* Don't provide the standard long option --help, which causes usage and
+ option help information to be output to stdout, and exit (0) called. */
+#define ARGP_NO_HELP 0x10
+/* Don't exit on errors (they may still result in error messages). */
+#define ARGP_NO_EXIT 0x20
+/* Use the gnu getopt `long-only' rules for parsing arguments. */
+#define ARGP_LONG_ONLY 0x40
+/* Turns off any message-printing/exiting options. */
+/* Parse the options strings in ARGC & ARGV according to the options in ARGP.
+ FLAGS is one of the ARGP_ flags above. If ARG_INDEX is non-NULL, the
+ index in ARGV of the first unparsed option is returned in it. If an
+ unknown option is present, ARGP_ERR_UNKNOWN is returned; if some parser
+ routine returned a non-zero value, it is returned; otherwise 0 is
+ returned. This function may also call exit unless the ARGP_NO_HELP flag
+ is set. INPUT is a pointer to a value to be passed in to the parser. */
+extern error_t argp_parse (__const struct argp *__restrict argp,
+ int argc, char **__restrict argv,
+ unsigned flags, int *__restrict arg_index,
+ void *__restrict input) __THROW;
+extern error_t __argp_parse (__const struct argp *__restrict argp,
+ int argc, char **__restrict argv,
+ unsigned flags, int *__restrict arg_index,
+ void *__restrict input) __THROW;
+/* Global variables. */
+/* If defined or set by the user program to a non-zero value, then a default
+ option --version is added (unless the ARGP_NO_HELP flag is used), which
+ will print this string followed by a newline and exit (unless the
+ ARGP_NO_EXIT flag is used). Overridden by ARGP_PROGRAM_VERSION_HOOK. */
+extern __const char *argp_program_version;
+/* If defined or set by the user program to a non-zero value, then a default
+ option --version is added (unless the ARGP_NO_HELP flag is used), which
+ calls this function with a stream to print the version to and a pointer to
+ the current parsing state, and then exits (unless the ARGP_NO_EXIT flag is
+ used). This variable takes precedent over ARGP_PROGRAM_VERSION. */
+extern void (*argp_program_version_hook) (FILE *__restrict __stream,
+ struct argp_state *__restrict
+ __state);
+/* If defined or set by the user program, it should point to string that is
+ the bug-reporting address for the program. It will be printed by
+ argp_help if the ARGP_HELP_BUG_ADDR flag is set (as it is by various
+ standard help messages), embedded in a sentence that says something like
+ `Report bugs to ADDR.'. */
+extern __const char *argp_program_bug_address;
+/* The exit status that argp will use when exiting due to a parsing error.
+ If not defined or set by the user program, this defaults to EX_USAGE from
+ <sysexits.h>. */
+extern error_t argp_err_exit_status;
+/* Flags for argp_help. */
+#define ARGP_HELP_USAGE 0x01 /* a Usage: message. */
+#define ARGP_HELP_SHORT_USAGE 0x02 /* " but don't actually print options. */
+#define ARGP_HELP_SEE 0x04 /* a `Try ... for more help' message. */
+#define ARGP_HELP_LONG 0x08 /* a long help message. */
+#define ARGP_HELP_PRE_DOC 0x10 /* doc string preceding long help. */
+#define ARGP_HELP_POST_DOC 0x20 /* doc string following long help. */
+#define ARGP_HELP_BUG_ADDR 0x40 /* bug report address */
+#define ARGP_HELP_LONG_ONLY 0x80 /* modify output appropriately to
+ reflect ARGP_LONG_ONLY mode. */
+/* These ARGP_HELP flags are only understood by argp_state_help. */
+#define ARGP_HELP_EXIT_ERR 0x100 /* Call exit(1) instead of returning. */
+#define ARGP_HELP_EXIT_OK 0x200 /* Call exit(0) instead of returning. */
+/* The standard thing to do after a program command line parsing error, if an
+ error message has already been printed. */
+#define ARGP_HELP_STD_ERR \
+/* The standard thing to do after a program command line parsing error, if no
+ more specific error message has been printed. */
+/* The standard thing to do in response to a --help option. */
+/* Output a usage message for ARGP to STREAM. FLAGS are from the set
+ ARGP_HELP_*. */
+extern void argp_help (__const struct argp *__restrict __argp,
+ FILE *__restrict __stream,
+ unsigned __flags, char *__restrict __name) __THROW;
+extern void __argp_help (__const struct argp *__restrict __argp,
+ FILE *__restrict __stream, unsigned __flags,
+ char *__name) __THROW;
+/* The following routines are intended to be called from within an argp
+ parsing routine (thus taking an argp_state structure as the first
+ argument). They may or may not print an error message and exit, depending
+ on the flags in STATE -- in any case, the caller should be prepared for
+ them *not* to exit, and should return an appropiate error after calling
+ them. [argp_usage & argp_error should probably be called argp_state_...,
+ but they're used often enough that they should be short] */
+/* Output, if appropriate, a usage message for STATE to STREAM. FLAGS are
+ from the set ARGP_HELP_*. */
+extern void argp_state_help (__const struct argp_state *__restrict __state,
+ FILE *__restrict __stream,
+ unsigned int __flags) __THROW;
+extern void __argp_state_help (__const struct argp_state *__restrict __state,
+ FILE *__restrict __stream,
+ unsigned int __flags) __THROW;
+/* Possibly output the standard usage message for ARGP to stderr and exit. */
+extern void argp_usage (__const struct argp_state *__state) __THROW;
+extern void __argp_usage (__const struct argp_state *__state) __THROW;
+/* If appropriate, print the printf string FMT and following args, preceded
+ by the program name and `:', to stderr, and followed by a `Try ... --help'
+ message, then exit (1). */
+extern void argp_error (__const struct argp_state *__restrict __state,
+ __const char *__restrict __fmt, ...) __THROW
+extern void __argp_error (__const struct argp_state *__restrict __state,
+ __const char *__restrict __fmt, ...) __THROW
+/* Similar to the standard gnu error-reporting function error(), but will
+ respect the ARGP_NO_EXIT and ARGP_NO_ERRS flags in STATE, and will print
+ to STATE->err_stream. This is useful for argument parsing code that is
+ shared between program startup (when exiting is desired) and runtime
+ option parsing (when typically an error code is returned instead). The
+ difference between this function and argp_error is that the latter is for
+ *parsing errors*, and the former is for other problems that occur during
+ parsing but don't reflect a (syntactic) problem with the input. */
+extern void argp_failure (__const struct argp_state *__restrict __state,
+ int __status, int __errnum,
+ __const char *__restrict __fmt, ...) __THROW
+extern void __argp_failure (__const struct argp_state *__restrict __state,
+ int __status, int __errnum,
+ __const char *__restrict __fmt, ...) __THROW
+/* Returns true if the option OPT is a valid short option. */
+extern int _option_is_short (__const struct argp_option *__opt) __THROW;
+extern int __option_is_short (__const struct argp_option *__opt) __THROW;
+/* Returns true if the option OPT is in fact the last (unused) entry in an
+ options array. */
+extern int _option_is_end (__const struct argp_option *__opt) __THROW;
+extern int __option_is_end (__const struct argp_option *__opt) __THROW;
+/* Return the input field for ARGP in the parser corresponding to STATE; used
+ by the help routines. */
+extern void *_argp_input (__const struct argp *__restrict __argp,
+ __const struct argp_state *__restrict __state)
+ __THROW;
+extern void *__argp_input (__const struct argp *__restrict __argp,
+ __const struct argp_state *__restrict __state)
+ __THROW;
+/* Used for extracting the program name from argv[0] */
+extern char *_argp_basename(char *name) __THROW;
+extern char *__argp_basename(char *name) __THROW;
+/* Getting the program name given an argp state */
+extern char *
+_argp_short_program_name(const struct argp_state *state) __THROW;
+extern char *
+__argp_short_program_name(const struct argp_state *state) __THROW;
+# if !_LIBC
+# define __argp_usage argp_usage
+# define __argp_state_help argp_state_help
+# define __option_is_short _option_is_short
+# define __option_is_end _option_is_end
+# endif
+# ifndef ARGP_EI
+# define ARGP_EI extern __inline__
+# endif
+ARGP_EI void
+__argp_usage (__const struct argp_state *__state)
+ __argp_state_help (__state, stderr, ARGP_HELP_STD_USAGE);
+ARGP_EI int
+__option_is_short (__const struct argp_option *__opt)
+ if (__opt->flags & OPTION_DOC)
+ return 0;
+ else
+ {
+ int __key = __opt->key;
+ return __key > 0 && isprint (__key);
+ }
+ARGP_EI int
+__option_is_end (__const struct argp_option *__opt)
+ return !__opt->key && !__opt->name && !__opt->doc && !__opt->group;
+# if !_LIBC
+# undef __argp_usage
+# undef __argp_state_help
+# undef __option_is_short
+# undef __option_is_end
+# endif
+#endif /* Use extern inlines. */
+#ifdef __cplusplus
+#endif /* argp.h */