1 /* Hierarchial argument parsing help output
2 Copyright (C) 1995-2005, 2007 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Miles Bader <miles@gnu.ai.mit.edu>.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21 # define _GNU_SOURCE 1
44 # define dgettext(domain, msgid) \
45 INTUSE(__dcgettext) (domain, msgid, LC_MESSAGES)
51 #include "argp-fmtstream.h"
52 #include "argp-namefrob.h"
55 # define SIZE_MAX ((size_t) -1)
58 /* User-selectable (using an environment variable) formatting parameters.
60 These may be specified in an environment variable called `ARGP_HELP_FMT',
61 with a contents like: VAR1=VAL1,VAR2=VAL2,BOOLVAR2,no-BOOLVAR2
62 Where VALn must be a positive integer. The list of variables is in the
63 UPARAM_NAMES vector, below. */
65 /* Default parameters. */
66 #define DUP_ARGS 0 /* True if option argument can be duplicated. */
67 #define DUP_ARGS_NOTE 1 /* True to print a note about duplicate args. */
68 #define SHORT_OPT_COL 2 /* column in which short options start */
69 #define LONG_OPT_COL 6 /* column in which long options start */
70 #define DOC_OPT_COL 2 /* column in which doc options start */
71 #define OPT_DOC_COL 29 /* column in which option text starts */
72 #define HEADER_COL 1 /* column in which group headers are printed */
73 #define USAGE_INDENT 12 /* indentation of wrapped usage lines */
74 #define RMARGIN 79 /* right margin used for wrapping */
76 /* User-selectable (using an environment variable) formatting parameters.
77 They must all be of type `int' for the parsing code to work. */
80 /* If true, arguments for an option are shown with both short and long
81 options, even when a given option has both, e.g. `-x ARG, --longx=ARG'.
82 If false, then if an option has both, the argument is only shown with
83 the long one, e.g., `-x, --longx=ARG', and a message indicating that
84 this really means both is printed below the options. */
87 /* This is true if when DUP_ARGS is false, and some duplicate arguments have
88 been suppressed, an explanatory message should be printed. */
91 /* Various output columns. */
92 int short_opt_col; /* column in which short options start */
93 int long_opt_col; /* column in which long options start */
94 int doc_opt_col; /* column in which doc options start */
95 int opt_doc_col; /* column in which option text starts */
96 int header_col; /* column in which group headers are printed */
97 int usage_indent; /* indentation of wrapped usage lines */
98 int rmargin; /* right margin used for wrapping */
100 int valid; /* True when the values in here are valid. */
103 /* This is a global variable, as user options are only ever read once. */
104 static struct uparams uparams = {
105 DUP_ARGS, DUP_ARGS_NOTE,
106 SHORT_OPT_COL, LONG_OPT_COL, DOC_OPT_COL, OPT_DOC_COL, HEADER_COL,
107 USAGE_INDENT, RMARGIN,
111 /* A particular uparam, and what the user name is. */
114 const char *name; /* User name. */
115 int is_bool; /* Whether it's `boolean'. */
116 size_t uparams_offs; /* Location of the (int) field in UPARAMS. */
119 /* The name-field mappings we know about. */
120 static const struct uparam_name uparam_names[] =
122 { "dup-args", 1, offsetof (struct uparams, dup_args) },
123 { "dup-args-note", 1, offsetof (struct uparams, dup_args_note) },
124 { "short-opt-col", 0, offsetof (struct uparams, short_opt_col) },
125 { "long-opt-col", 0, offsetof (struct uparams, long_opt_col) },
126 { "doc-opt-col", 0, offsetof (struct uparams, doc_opt_col) },
127 { "opt-doc-col", 0, offsetof (struct uparams, opt_doc_col) },
128 { "header-col", 0, offsetof (struct uparams, header_col) },
129 { "usage-indent", 0, offsetof (struct uparams, usage_indent) },
130 { "rmargin", 0, offsetof (struct uparams, rmargin) },
135 validate_uparams (const struct argp_state *state, struct uparams *upptr)
137 const struct uparam_name *up;
139 for (up = uparam_names; up->name; up++)
142 || up->uparams_offs == offsetof (struct uparams, rmargin))
144 if (*(int *)((char *)upptr + up->uparams_offs) >= upptr->rmargin)
146 __argp_failure (state, 0, 0,
147 dgettext (state->root_argp->argp_domain,
149 ARGP_HELP_FMT: %s value is less than or equal to %s"),
150 "rmargin", up->name);
158 /* Read user options from the environment, and fill in UPARAMS appropiately. */
160 fill_in_uparams (const struct argp_state *state)
162 const char *var = getenv ("ARGP_HELP_FMT");
163 struct uparams new_params = uparams;
165 #define SKIPWS(p) do { while (isspace ((unsigned char) *p)) p++; } while (0);
174 if (isalpha ((unsigned char) *var))
177 const struct uparam_name *un;
178 int unspec = 0, val = 0;
179 const char *arg = var;
181 while (isalnum ((unsigned char) *arg) || *arg == '-' || *arg == '_')
187 if (*arg == '\0' || *arg == ',')
189 else if (*arg == '=')
197 if (var[0] == 'n' && var[1] == 'o' && var[2] == '-')
206 else if (isdigit ((unsigned char) *arg))
209 while (isdigit ((unsigned char) *arg))
214 for (un = uparam_names; un->name; un++)
215 if (strlen (un->name) == var_len
216 && strncmp (var, un->name, var_len) == 0)
218 if (unspec && !un->is_bool)
219 __argp_failure (state, 0, 0,
220 dgettext (state->root_argp->argp_domain,
222 %.*s: ARGP_HELP_FMT parameter requires a value"),
225 __argp_failure (state, 0, 0,
226 dgettext (state->root_argp->argp_domain,
228 %.*s: ARGP_HELP_FMT parameter must be positive"),
231 *(int *)((char *)&new_params + un->uparams_offs) = val;
235 __argp_failure (state, 0, 0,
236 dgettext (state->root_argp->argp_domain, "\
237 %.*s: Unknown ARGP_HELP_FMT parameter"),
246 __argp_failure (state, 0, 0,
247 dgettext (state->root_argp->argp_domain,
248 "Garbage in ARGP_HELP_FMT: %s"), var);
252 validate_uparams (state, &new_params);
256 /* Returns true if OPT hasn't been marked invisible. Visibility only affects
257 whether OPT is displayed or used in sorting, not option shadowing. */
258 #define ovisible(opt) (! ((opt)->flags & OPTION_HIDDEN))
260 /* Returns true if OPT is an alias for an earlier option. */
261 #define oalias(opt) ((opt)->flags & OPTION_ALIAS)
263 /* Returns true if OPT is an documentation-only entry. */
264 #define odoc(opt) ((opt)->flags & OPTION_DOC)
266 /* Returns true if OPT should not be translated */
267 #define onotrans(opt) ((opt)->flags & OPTION_NO_TRANS)
269 /* Returns true if OPT is the end-of-list marker for a list of options. */
270 #define oend(opt) __option_is_end (opt)
272 /* Returns true if OPT has a short option. */
273 #define oshort(opt) __option_is_short (opt)
276 The help format for a particular option is like:
278 -xARG, -yARG, --long1=ARG, --long2=ARG Documentation...
280 Where ARG will be omitted if there's no argument, for this option, or
281 will be surrounded by "[" and "]" appropiately if the argument is
282 optional. The documentation string is word-wrapped appropiately, and if
283 the list of options is long enough, it will be started on a separate line.
284 If there are no short options for a given option, the first long option is
285 indented slighly in a way that's supposed to make most long options appear
286 to be in a separate column.
288 For example, the following output (from ps):
290 -p PID, --pid=PID List the process PID
291 --pgrp=PGRP List processes in the process group PGRP
292 -P, -x, --no-parent Include processes without parents
293 -Q, --all-fields Don't elide unusable fields (normally if there's
294 some reason ps can't print a field for any
295 process, it's removed from the output entirely)
296 -r, --reverse, --gratuitously-long-reverse-option
297 Reverse the order of any sort
298 --session[=SID] Add the processes from the session SID (which
299 defaults to the sid of the current process)
301 Here are some more options:
302 -f ZOT, --foonly=ZOT Glork a foonly
303 -z, --zaza Snit a zar
305 -?, --help Give this help list
306 --usage Give a short usage message
307 -V, --version Print program version
309 The struct argp_option array for the above could look like:
312 {"pid", 'p', "PID", 0, "List the process PID"},
313 {"pgrp", OPT_PGRP, "PGRP", 0, "List processes in the process group PGRP"},
314 {"no-parent", 'P', 0, 0, "Include processes without parents"},
315 {0, 'x', 0, OPTION_ALIAS},
316 {"all-fields",'Q', 0, 0, "Don't elide unusable fields (normally"
317 " if there's some reason ps can't"
318 " print a field for any process, it's"
319 " removed from the output entirely)" },
320 {"reverse", 'r', 0, 0, "Reverse the order of any sort"},
321 {"gratuitously-long-reverse-option", 0, 0, OPTION_ALIAS},
322 {"session", OPT_SESS, "SID", OPTION_ARG_OPTIONAL,
323 "Add the processes from the session"
324 " SID (which defaults to the sid of"
325 " the current process)" },
327 {0,0,0,0, "Here are some more options:"},
328 {"foonly", 'f', "ZOT", 0, "Glork a foonly"},
329 {"zaza", 'z', 0, 0, "Snit a zar"},
334 Note that the last three options are automatically supplied by argp_parse,
335 unless you tell it not to with ARGP_NO_HELP.
339 /* Returns true if CH occurs between BEG and END. */
341 find_char (char ch, char *beg, char *end)
351 struct hol_cluster; /* fwd decl */
356 const struct argp_option *opt;
357 /* Number of options (including aliases). */
360 /* A pointers into the HOL's short_options field, to the first short option
361 letter for this entry. The order of the characters following this point
362 corresponds to the order of options pointed to by OPT, and there are at
363 most NUM. A short option recorded in a option following OPT is only
364 valid if it occurs in the right place in SHORT_OPTIONS (otherwise it's
365 probably been shadowed by some other entry). */
368 /* Entries are sorted by their group first, in the order:
369 1, 2, ..., n, 0, -m, ..., -2, -1
370 and then alphabetically within each group. The default is 0. */
373 /* The cluster of options this entry belongs to, or 0 if none. */
374 struct hol_cluster *cluster;
376 /* The argp from which this option came. */
377 const struct argp *argp;
380 /* A cluster of entries to reflect the argp tree structure. */
383 /* A descriptive header printed before options in this cluster. */
386 /* Used to order clusters within the same group with the same parent,
387 according to the order in which they occurred in the parent argp's child
391 /* How to sort this cluster with respect to options and other clusters at the
392 same depth (clusters always follow options in the same group). */
395 /* The cluster to which this cluster belongs, or 0 if it's at the base
397 struct hol_cluster *parent;
399 /* The argp from which this cluster is (eventually) derived. */
400 const struct argp *argp;
402 /* The distance this cluster is from the root. */
405 /* Clusters in a given hol are kept in a linked list, to make freeing them
407 struct hol_cluster *next;
410 /* A list of options for help. */
413 /* An array of hol_entry's. */
414 struct hol_entry *entries;
415 /* The number of entries in this hol. If this field is zero, the others
417 unsigned num_entries;
419 /* A string containing all short options in this HOL. Each entry contains
420 pointers into this string, so the order can't be messed with blindly. */
423 /* Clusters of entries in this hol. */
424 struct hol_cluster *clusters;
427 /* Create a struct hol from the options in ARGP. CLUSTER is the
428 hol_cluster in which these entries occur, or 0, if at the root. */
430 make_hol (const struct argp *argp, struct hol_cluster *cluster)
433 const struct argp_option *o;
434 const struct argp_option *opts = argp->options;
435 struct hol_entry *entry;
436 unsigned num_short_options = 0;
437 struct hol *hol = malloc (sizeof (struct hol));
441 hol->num_entries = 0;
448 /* The first option must not be an alias. */
449 assert (! oalias (opts));
451 /* Calculate the space needed. */
452 for (o = opts; ! oend (o); o++)
457 num_short_options++; /* This is an upper bound. */
460 hol->entries = malloc (sizeof (struct hol_entry) * hol->num_entries);
461 hol->short_options = malloc (num_short_options + 1);
463 assert (hol->entries && hol->short_options);
464 if (SIZE_MAX <= UINT_MAX)
465 assert (hol->num_entries <= SIZE_MAX / sizeof (struct hol_entry));
467 /* Fill in the entries. */
468 so = hol->short_options;
469 for (o = opts, entry = hol->entries; ! oend (o); entry++)
473 entry->short_options = so;
474 entry->group = cur_group =
477 : ((!o->name && !o->key)
480 entry->cluster = cluster;
486 if (oshort (o) && ! find_char (o->key, hol->short_options, so))
487 /* O has a valid short option which hasn't already been used.*/
491 while (! oend (o) && oalias (o));
493 *so = '\0'; /* null terminated so we can find the length */
499 /* Add a new cluster to HOL, with the given GROUP and HEADER (taken from the
500 associated argp child list entry), INDEX, and PARENT, and return a pointer
501 to it. ARGP is the argp that this cluster results from. */
502 static struct hol_cluster *
503 hol_add_cluster (struct hol *hol, int group, const char *header, int index,
504 struct hol_cluster *parent, const struct argp *argp)
506 struct hol_cluster *cl = malloc (sizeof (struct hol_cluster));
515 cl->depth = parent ? parent->depth + 1 : 0;
517 cl->next = hol->clusters;
523 /* Free HOL and any resources it uses. */
525 hol_free (struct hol *hol)
527 struct hol_cluster *cl = hol->clusters;
531 struct hol_cluster *next = cl->next;
536 if (hol->num_entries > 0)
539 free (hol->short_options);
546 hol_entry_short_iterate (const struct hol_entry *entry,
547 int (*func)(const struct argp_option *opt,
548 const struct argp_option *real,
549 const char *domain, void *cookie),
550 const char *domain, void *cookie)
554 const struct argp_option *opt, *real = entry->opt;
555 char *so = entry->short_options;
557 for (opt = real, nopts = entry->num; nopts > 0 && !val; opt++, nopts--)
558 if (oshort (opt) && *so == opt->key)
563 val = (*func)(opt, real, domain, cookie);
571 __attribute__ ((always_inline))
572 hol_entry_long_iterate (const struct hol_entry *entry,
573 int (*func)(const struct argp_option *opt,
574 const struct argp_option *real,
575 const char *domain, void *cookie),
576 const char *domain, void *cookie)
580 const struct argp_option *opt, *real = entry->opt;
582 for (opt = real, nopts = entry->num; nopts > 0 && !val; opt++, nopts--)
588 val = (*func)(opt, real, domain, cookie);
594 /* Iterator that returns true for the first short option. */
596 until_short (const struct argp_option *opt, const struct argp_option *real,
597 const char *domain, void *cookie)
599 return oshort (opt) ? opt->key : 0;
602 /* Returns the first valid short option in ENTRY, or 0 if there is none. */
604 hol_entry_first_short (const struct hol_entry *entry)
606 return hol_entry_short_iterate (entry, until_short,
607 entry->argp->argp_domain, 0);
610 /* Returns the first valid long option in ENTRY, or 0 if there is none. */
612 hol_entry_first_long (const struct hol_entry *entry)
614 const struct argp_option *opt;
616 for (opt = entry->opt, num = entry->num; num > 0; opt++, num--)
617 if (opt->name && ovisible (opt))
622 /* Returns the entry in HOL with the long option name NAME, or 0 if there is
624 static struct hol_entry *
625 hol_find_entry (struct hol *hol, const char *name)
627 struct hol_entry *entry = hol->entries;
628 unsigned num_entries = hol->num_entries;
630 while (num_entries-- > 0)
632 const struct argp_option *opt = entry->opt;
633 unsigned num_opts = entry->num;
635 while (num_opts-- > 0)
636 if (opt->name && ovisible (opt) && strcmp (opt->name, name) == 0)
647 /* If an entry with the long option NAME occurs in HOL, set it's special
648 sort position to GROUP. */
650 hol_set_group (struct hol *hol, const char *name, int group)
652 struct hol_entry *entry = hol_find_entry (hol, name);
654 entry->group = group;
657 /* Order by group: 0, 1, 2, ..., n, -m, ..., -2, -1.
658 EQ is what to return if GROUP1 and GROUP2 are the same. */
660 group_cmp (int group1, int group2, int eq)
662 if (group1 == group2)
664 else if ((group1 < 0 && group2 < 0) || (group1 >= 0 && group2 >= 0))
665 return group1 - group2;
667 return group2 - group1;
670 /* Compare clusters CL1 & CL2 by the order that they should appear in
673 hol_cluster_cmp (const struct hol_cluster *cl1, const struct hol_cluster *cl2)
675 /* If one cluster is deeper than the other, use its ancestor at the same
676 level, so that finding the common ancestor is straightforward.
678 clN->depth > 0 means that clN->parent != NULL (see hol_add_cluster) */
679 while (cl1->depth > cl2->depth)
681 while (cl2->depth > cl1->depth)
684 /* Now reduce both clusters to their ancestors at the point where both have
685 a common parent; these can be directly compared. */
686 while (cl1->parent != cl2->parent)
687 cl1 = cl1->parent, cl2 = cl2->parent;
689 return group_cmp (cl1->group, cl2->group, cl2->index - cl1->index);
692 /* Return the ancestor of CL that's just below the root (i.e., has a parent
694 static struct hol_cluster *
695 hol_cluster_base (struct hol_cluster *cl)
702 /* Return true if CL1 is a child of CL2. */
704 hol_cluster_is_child (const struct hol_cluster *cl1,
705 const struct hol_cluster *cl2)
707 while (cl1 && cl1 != cl2)
712 /* Given the name of a OPTION_DOC option, modifies NAME to start at the tail
713 that should be used for comparisons, and returns true iff it should be
714 treated as a non-option. */
716 canon_doc_option (const char **name)
724 /* Skip initial whitespace. */
725 while (isspace ((unsigned char) **name))
727 /* Decide whether this looks like an option (leading `-') or not. */
728 non_opt = (**name != '-');
729 /* Skip until part of name used for sorting. */
730 while (**name && !isalnum ((unsigned char) **name))
736 /* Order ENTRY1 & ENTRY2 by the order which they should appear in a help
739 hol_entry_cmp (const struct hol_entry *entry1,
740 const struct hol_entry *entry2)
742 /* The group numbers by which the entries should be ordered; if either is
743 in a cluster, then this is just the group within the cluster. */
744 int group1 = entry1->group, group2 = entry2->group;
746 if (entry1->cluster != entry2->cluster)
748 /* The entries are not within the same cluster, so we can't compare them
749 directly, we have to use the appropiate clustering level too. */
750 if (! entry1->cluster)
751 /* ENTRY1 is at the `base level', not in a cluster, so we have to
752 compare it's group number with that of the base cluster in which
753 ENTRY2 resides. Note that if they're in the same group, the
754 clustered option always comes laster. */
755 return group_cmp (group1, hol_cluster_base (entry2->cluster)->group, -1);
756 else if (! entry2->cluster)
757 /* Likewise, but ENTRY2's not in a cluster. */
758 return group_cmp (hol_cluster_base (entry1->cluster)->group, group2, 1);
760 /* Both entries are in clusters, we can just compare the clusters. */
761 return hol_cluster_cmp (entry1->cluster, entry2->cluster);
763 else if (group1 == group2)
764 /* The entries are both in the same cluster and group, so compare them
767 int short1 = hol_entry_first_short (entry1);
768 int short2 = hol_entry_first_short (entry2);
769 int doc1 = odoc (entry1->opt);
770 int doc2 = odoc (entry2->opt);
771 const char *long1 = hol_entry_first_long (entry1);
772 const char *long2 = hol_entry_first_long (entry2);
775 doc1 = canon_doc_option (&long1);
777 doc2 = canon_doc_option (&long2);
780 /* `documentation' options always follow normal options (or
781 documentation options that *look* like normal options). */
783 else if (!short1 && !short2 && long1 && long2)
784 /* Only long options. */
785 return __strcasecmp (long1, long2);
787 /* Compare short/short, long/short, short/long, using the first
788 character of long options. Entries without *any* valid
789 options (such as options with OPTION_HIDDEN set) will be put
790 first, but as they're not displayed, it doesn't matter where
793 char first1 = short1 ? short1 : long1 ? *long1 : 0;
794 char first2 = short2 ? short2 : long2 ? *long2 : 0;
796 int lower_cmp = _tolower (first1) - _tolower (first2);
798 int lower_cmp = tolower (first1) - tolower (first2);
800 /* Compare ignoring case, except when the options are both the
801 same letter, in which case lower-case always comes first. */
802 return lower_cmp ? lower_cmp : first2 - first1;
806 /* Within the same cluster, but not the same group, so just compare
808 return group_cmp (group1, group2, 0);
811 /* Version of hol_entry_cmp with correct signature for qsort. */
813 hol_entry_qcmp (const void *entry1_v, const void *entry2_v)
815 return hol_entry_cmp (entry1_v, entry2_v);
818 /* Sort HOL by group and alphabetically by option name (with short options
819 taking precedence over long). Since the sorting is for display purposes
820 only, the shadowing of options isn't effected. */
822 hol_sort (struct hol *hol)
824 if (hol->num_entries > 0)
825 qsort (hol->entries, hol->num_entries, sizeof (struct hol_entry),
829 /* Append MORE to HOL, destroying MORE in the process. Options in HOL shadow
830 any in MORE with the same name. */
832 hol_append (struct hol *hol, struct hol *more)
834 struct hol_cluster **cl_end = &hol->clusters;
836 /* Steal MORE's cluster list, and add it to the end of HOL's. */
838 cl_end = &(*cl_end)->next;
839 *cl_end = more->clusters;
843 if (more->num_entries > 0)
845 if (hol->num_entries == 0)
847 hol->num_entries = more->num_entries;
848 hol->entries = more->entries;
849 hol->short_options = more->short_options;
850 more->num_entries = 0; /* Mark MORE's fields as invalid. */
853 /* Append the entries in MORE to those in HOL, taking care to only add
854 non-shadowed SHORT_OPTIONS values. */
859 unsigned num_entries = hol->num_entries + more->num_entries;
860 struct hol_entry *entries =
861 malloc (num_entries * sizeof (struct hol_entry));
862 unsigned hol_so_len = strlen (hol->short_options);
863 char *short_options =
864 malloc (hol_so_len + strlen (more->short_options) + 1);
866 assert (entries && short_options);
867 if (SIZE_MAX <= UINT_MAX)
868 assert (num_entries <= SIZE_MAX / sizeof (struct hol_entry));
870 __mempcpy (__mempcpy (entries, hol->entries,
871 hol->num_entries * sizeof (struct hol_entry)),
873 more->num_entries * sizeof (struct hol_entry));
875 __mempcpy (short_options, hol->short_options, hol_so_len);
877 /* Fix up the short options pointers from HOL. */
878 for (e = entries, left = hol->num_entries; left > 0; e++, left--)
879 e->short_options += (short_options - hol->short_options);
881 /* Now add the short options from MORE, fixing up its entries
883 so = short_options + hol_so_len;
884 more_so = more->short_options;
885 for (left = more->num_entries; left > 0; e++, left--)
888 const struct argp_option *opt;
890 e->short_options = so;
892 for (opts_left = e->num, opt = e->opt; opts_left; opt++, opts_left--)
895 if (oshort (opt) && ch == opt->key)
896 /* The next short option in MORE_SO, CH, is from OPT. */
898 if (! find_char (ch, short_options,
899 short_options + hol_so_len))
900 /* The short option CH isn't shadowed by HOL's options,
901 so add it to the sum. */
911 free (hol->short_options);
913 hol->entries = entries;
914 hol->num_entries = num_entries;
915 hol->short_options = short_options;
922 /* Inserts enough spaces to make sure STREAM is at column COL. */
924 indent_to (argp_fmtstream_t stream, unsigned col)
926 int needed = col - __argp_fmtstream_point (stream);
928 __argp_fmtstream_putc (stream, ' ');
931 /* Output to STREAM either a space, or a newline if there isn't room for at
932 least ENSURE characters before the right margin. */
934 space (argp_fmtstream_t stream, size_t ensure)
936 if (__argp_fmtstream_point (stream) + ensure
937 >= __argp_fmtstream_rmargin (stream))
938 __argp_fmtstream_putc (stream, '\n');
940 __argp_fmtstream_putc (stream, ' ');
943 /* If the option REAL has an argument, we print it in using the printf
944 format REQ_FMT or OPT_FMT depending on whether it's a required or
945 optional argument. */
947 arg (const struct argp_option *real, const char *req_fmt, const char *opt_fmt,
948 const char *domain, argp_fmtstream_t stream)
952 if (real->flags & OPTION_ARG_OPTIONAL)
953 __argp_fmtstream_printf (stream, opt_fmt,
954 dgettext (domain, real->arg));
956 __argp_fmtstream_printf (stream, req_fmt,
957 dgettext (domain, real->arg));
961 /* Helper functions for hol_entry_help. */
963 /* State used during the execution of hol_help. */
964 struct hol_help_state
966 /* PREV_ENTRY should contain the previous entry printed, or 0. */
967 struct hol_entry *prev_entry;
969 /* If an entry is in a different group from the previous one, and SEP_GROUPS
970 is true, then a blank line will be printed before any output. */
973 /* True if a duplicate option argument was suppressed (only ever set if
974 UPARAMS.dup_args is false). */
975 int suppressed_dup_arg;
978 /* Some state used while printing a help entry (used to communicate with
979 helper functions). See the doc for hol_entry_help for more info, as most
980 of the fields are copied from its arguments. */
983 const struct hol_entry *entry;
984 argp_fmtstream_t stream;
985 struct hol_help_state *hhstate;
987 /* True if nothing's been printed so far. */
990 /* If non-zero, the state that was used to print this help. */
991 const struct argp_state *state;
994 /* If a user doc filter should be applied to DOC, do so. */
996 filter_doc (const char *doc, int key, const struct argp *argp,
997 const struct argp_state *state)
999 if (argp->help_filter)
1000 /* We must apply a user filter to this output. */
1002 void *input = __argp_input (argp, state);
1003 return (*argp->help_filter) (key, doc, input);
1010 /* Prints STR as a header line, with the margin lines set appropiately, and
1011 notes the fact that groups should be separated with a blank line. ARGP is
1012 the argp that should dictate any user doc filtering to take place. Note
1013 that the previous wrap margin isn't restored, but the left margin is reset
1016 print_header (const char *str, const struct argp *argp,
1017 struct pentry_state *pest)
1019 const char *tstr = dgettext (argp->argp_domain, str);
1020 const char *fstr = filter_doc (tstr, ARGP_KEY_HELP_HEADER, argp, pest->state);
1026 if (pest->hhstate->prev_entry)
1027 /* Precede with a blank line. */
1028 __argp_fmtstream_putc (pest->stream, '\n');
1029 indent_to (pest->stream, uparams.header_col);
1030 __argp_fmtstream_set_lmargin (pest->stream, uparams.header_col);
1031 __argp_fmtstream_set_wmargin (pest->stream, uparams.header_col);
1032 __argp_fmtstream_puts (pest->stream, fstr);
1033 __argp_fmtstream_set_lmargin (pest->stream, 0);
1034 __argp_fmtstream_putc (pest->stream, '\n');
1037 pest->hhstate->sep_groups = 1; /* Separate subsequent groups. */
1041 free ((char *) fstr);
1044 /* Inserts a comma if this isn't the first item on the line, and then makes
1045 sure we're at least to column COL. If this *is* the first item on a line,
1046 prints any pending whitespace/headers that should precede this line. Also
1049 comma (unsigned col, struct pentry_state *pest)
1053 const struct hol_entry *pe = pest->hhstate->prev_entry;
1054 const struct hol_cluster *cl = pest->entry->cluster;
1056 if (pest->hhstate->sep_groups && pe && pest->entry->group != pe->group)
1057 __argp_fmtstream_putc (pest->stream, '\n');
1059 if (cl && cl->header && *cl->header
1061 || (pe->cluster != cl
1062 && !hol_cluster_is_child (pe->cluster, cl))))
1063 /* If we're changing clusters, then this must be the start of the
1064 ENTRY's cluster unless that is an ancestor of the previous one
1065 (in which case we had just popped into a sub-cluster for a bit).
1066 If so, then print the cluster's header line. */
1068 int old_wm = __argp_fmtstream_wmargin (pest->stream);
1069 print_header (cl->header, cl->argp, pest);
1070 __argp_fmtstream_set_wmargin (pest->stream, old_wm);
1076 __argp_fmtstream_puts (pest->stream, ", ");
1078 indent_to (pest->stream, col);
1081 /* Print help for ENTRY to STREAM. */
1083 hol_entry_help (struct hol_entry *entry, const struct argp_state *state,
1084 argp_fmtstream_t stream, struct hol_help_state *hhstate)
1087 const struct argp_option *real = entry->opt, *opt;
1088 char *so = entry->short_options;
1089 int have_long_opt = 0; /* We have any long options. */
1090 /* Saved margins. */
1091 int old_lm = __argp_fmtstream_set_lmargin (stream, 0);
1092 int old_wm = __argp_fmtstream_wmargin (stream);
1093 /* PEST is a state block holding some of our variables that we'd like to
1094 share with helper functions. */
1095 struct pentry_state pest;
1098 pest.stream = stream;
1099 pest.hhstate = hhstate;
1104 for (opt = real, num = entry->num; num > 0; opt++, num--)
1105 if (opt->name && ovisible (opt))
1111 /* First emit short options. */
1112 __argp_fmtstream_set_wmargin (stream, uparams.short_opt_col); /* For truly bizarre cases. */
1113 for (opt = real, num = entry->num; num > 0; opt++, num--)
1114 if (oshort (opt) && opt->key == *so)
1115 /* OPT has a valid (non shadowed) short option. */
1119 comma (uparams.short_opt_col, &pest);
1120 __argp_fmtstream_putc (stream, '-');
1121 __argp_fmtstream_putc (stream, *so);
1122 if (!have_long_opt || uparams.dup_args)
1123 arg (real, " %s", "[%s]", state->root_argp->argp_domain, stream);
1125 hhstate->suppressed_dup_arg = 1;
1130 /* Now, long options. */
1132 /* A `documentation' option. */
1134 __argp_fmtstream_set_wmargin (stream, uparams.doc_opt_col);
1135 for (opt = real, num = entry->num; num > 0; opt++, num--)
1136 if (opt->name && *opt->name && ovisible (opt))
1138 comma (uparams.doc_opt_col, &pest);
1139 /* Calling dgettext here isn't quite right, since sorting will
1140 have been done on the original; but documentation options
1141 should be pretty rare anyway... */
1142 __argp_fmtstream_puts (stream,
1145 dgettext (state->root_argp->argp_domain,
1150 /* A real long option. */
1152 int first_long_opt = 1;
1154 __argp_fmtstream_set_wmargin (stream, uparams.long_opt_col);
1155 for (opt = real, num = entry->num; num > 0; opt++, num--)
1156 if (opt->name && ovisible (opt))
1158 comma (uparams.long_opt_col, &pest);
1159 __argp_fmtstream_printf (stream, "--%s", opt->name);
1160 if (first_long_opt || uparams.dup_args)
1161 arg (real, "=%s", "[=%s]", state->root_argp->argp_domain,
1164 hhstate->suppressed_dup_arg = 1;
1168 /* Next, documentation strings. */
1169 __argp_fmtstream_set_lmargin (stream, 0);
1173 /* Didn't print any switches, what's up? */
1174 if (!oshort (real) && !real->name)
1175 /* This is a group header, print it nicely. */
1176 print_header (real->doc, entry->argp, &pest);
1178 /* Just a totally shadowed option or null header; print nothing. */
1179 goto cleanup; /* Just return, after cleaning up. */
1183 const char *tstr = real->doc ? dgettext (state->root_argp->argp_domain,
1185 const char *fstr = filter_doc (tstr, real->key, entry->argp, state);
1188 unsigned int col = __argp_fmtstream_point (stream);
1190 __argp_fmtstream_set_lmargin (stream, uparams.opt_doc_col);
1191 __argp_fmtstream_set_wmargin (stream, uparams.opt_doc_col);
1193 if (col > (unsigned int) (uparams.opt_doc_col + 3))
1194 __argp_fmtstream_putc (stream, '\n');
1195 else if (col >= (unsigned int) uparams.opt_doc_col)
1196 __argp_fmtstream_puts (stream, " ");
1198 indent_to (stream, uparams.opt_doc_col);
1200 __argp_fmtstream_puts (stream, fstr);
1202 if (fstr && fstr != tstr)
1203 free ((char *) fstr);
1205 /* Reset the left margin. */
1206 __argp_fmtstream_set_lmargin (stream, 0);
1207 __argp_fmtstream_putc (stream, '\n');
1210 hhstate->prev_entry = entry;
1213 __argp_fmtstream_set_lmargin (stream, old_lm);
1214 __argp_fmtstream_set_wmargin (stream, old_wm);
1217 /* Output a long help message about the options in HOL to STREAM. */
1219 hol_help (struct hol *hol, const struct argp_state *state,
1220 argp_fmtstream_t stream)
1223 struct hol_entry *entry;
1224 struct hol_help_state hhstate = { 0, 0, 0 };
1226 for (entry = hol->entries, num = hol->num_entries; num > 0; entry++, num--)
1227 hol_entry_help (entry, state, stream, &hhstate);
1229 if (hhstate.suppressed_dup_arg && uparams.dup_args_note)
1231 const char *tstr = dgettext (state->root_argp->argp_domain, "\
1232 Mandatory or optional arguments to long options are also mandatory or \
1233 optional for any corresponding short options.");
1234 const char *fstr = filter_doc (tstr, ARGP_KEY_HELP_DUP_ARGS_NOTE,
1235 state ? state->root_argp : 0, state);
1238 __argp_fmtstream_putc (stream, '\n');
1239 __argp_fmtstream_puts (stream, fstr);
1240 __argp_fmtstream_putc (stream, '\n');
1242 if (fstr && fstr != tstr)
1243 free ((char *) fstr);
1247 /* Helper functions for hol_usage. */
1249 /* If OPT is a short option without an arg, append its key to the string
1250 pointer pointer to by COOKIE, and advance the pointer. */
1252 add_argless_short_opt (const struct argp_option *opt,
1253 const struct argp_option *real,
1254 const char *domain, void *cookie)
1256 char **snao_end = cookie;
1257 if (!(opt->arg || real->arg)
1258 && !((opt->flags | real->flags) & OPTION_NO_USAGE))
1259 *(*snao_end)++ = opt->key;
1263 /* If OPT is a short option with an arg, output a usage entry for it to the
1264 stream pointed at by COOKIE. */
1266 usage_argful_short_opt (const struct argp_option *opt,
1267 const struct argp_option *real,
1268 const char *domain, void *cookie)
1270 argp_fmtstream_t stream = cookie;
1271 const char *arg = opt->arg;
1272 int flags = opt->flags | real->flags;
1277 if (arg && !(flags & OPTION_NO_USAGE))
1279 arg = dgettext (domain, arg);
1281 if (flags & OPTION_ARG_OPTIONAL)
1282 __argp_fmtstream_printf (stream, " [-%c[%s]]", opt->key, arg);
1285 /* Manually do line wrapping so that it (probably) won't
1286 get wrapped at the embedded space. */
1287 space (stream, 6 + strlen (arg));
1288 __argp_fmtstream_printf (stream, "[-%c %s]", opt->key, arg);
1295 /* Output a usage entry for the long option opt to the stream pointed at by
1298 usage_long_opt (const struct argp_option *opt,
1299 const struct argp_option *real,
1300 const char *domain, void *cookie)
1302 argp_fmtstream_t stream = cookie;
1303 const char *arg = opt->arg;
1304 int flags = opt->flags | real->flags;
1309 if (! (flags & OPTION_NO_USAGE) && !odoc (opt))
1313 arg = dgettext (domain, arg);
1314 if (flags & OPTION_ARG_OPTIONAL)
1315 __argp_fmtstream_printf (stream, " [--%s[=%s]]", opt->name, arg);
1317 __argp_fmtstream_printf (stream, " [--%s=%s]", opt->name, arg);
1320 __argp_fmtstream_printf (stream, " [--%s]", opt->name);
1326 /* Print a short usage description for the arguments in HOL to STREAM. */
1328 hol_usage (struct hol *hol, argp_fmtstream_t stream)
1330 if (hol->num_entries > 0)
1333 struct hol_entry *entry;
1334 char *short_no_arg_opts = alloca (strlen (hol->short_options) + 1);
1335 char *snao_end = short_no_arg_opts;
1337 /* First we put a list of short options without arguments. */
1338 for (entry = hol->entries, nentries = hol->num_entries
1340 ; entry++, nentries--)
1341 hol_entry_short_iterate (entry, add_argless_short_opt,
1342 entry->argp->argp_domain, &snao_end);
1343 if (snao_end > short_no_arg_opts)
1346 __argp_fmtstream_printf (stream, " [-%s]", short_no_arg_opts);
1349 /* Now a list of short options *with* arguments. */
1350 for (entry = hol->entries, nentries = hol->num_entries
1352 ; entry++, nentries--)
1353 hol_entry_short_iterate (entry, usage_argful_short_opt,
1354 entry->argp->argp_domain, stream);
1356 /* Finally, a list of long options (whew!). */
1357 for (entry = hol->entries, nentries = hol->num_entries
1359 ; entry++, nentries--)
1360 hol_entry_long_iterate (entry, usage_long_opt,
1361 entry->argp->argp_domain, stream);
1365 /* Make a HOL containing all levels of options in ARGP. CLUSTER is the
1366 cluster in which ARGP's entries should be clustered, or 0. */
1368 argp_hol (const struct argp *argp, struct hol_cluster *cluster)
1370 const struct argp_child *child = argp->children;
1371 struct hol *hol = make_hol (argp, cluster);
1375 struct hol_cluster *child_cluster =
1376 ((child->group || child->header)
1377 /* Put CHILD->argp within its own cluster. */
1378 ? hol_add_cluster (hol, child->group, child->header,
1379 child - argp->children, cluster, argp)
1380 /* Just merge it into the parent's cluster. */
1382 hol_append (hol, argp_hol (child->argp, child_cluster)) ;
1388 /* Calculate how many different levels with alternative args strings exist in
1391 argp_args_levels (const struct argp *argp)
1394 const struct argp_child *child = argp->children;
1396 if (argp->args_doc && strchr (argp->args_doc, '\n'))
1401 levels += argp_args_levels ((child++)->argp);
1406 /* Print all the non-option args documented in ARGP to STREAM. Any output is
1407 preceded by a space. LEVELS is a pointer to a byte vector the length
1408 returned by argp_args_levels; it should be initialized to zero, and
1409 updated by this routine for the next call if ADVANCE is true. True is
1410 returned as long as there are more patterns to output. */
1412 argp_args_usage (const struct argp *argp, const struct argp_state *state,
1413 char **levels, int advance, argp_fmtstream_t stream)
1415 char *our_level = *levels;
1417 const struct argp_child *child = argp->children;
1418 const char *tdoc = dgettext (argp->argp_domain, argp->args_doc), *nl = 0;
1419 const char *fdoc = filter_doc (tdoc, ARGP_KEY_HELP_ARGS_DOC, argp, state);
1423 const char *cp = fdoc;
1424 nl = __strchrnul (cp, '\n');
1426 /* This is a `multi-level' args doc; advance to the correct position
1427 as determined by our state in LEVELS, and update LEVELS. */
1431 for (i = 0; i < *our_level; i++)
1432 cp = nl + 1, nl = __strchrnul (cp, '\n');
1436 /* Manually do line wrapping so that it (probably) won't get wrapped at
1437 any embedded spaces. */
1438 space (stream, 1 + nl - cp);
1440 __argp_fmtstream_write (stream, cp, nl - cp);
1442 if (fdoc && fdoc != tdoc)
1443 free ((char *)fdoc); /* Free user's modified doc string. */
1447 advance = !argp_args_usage ((child++)->argp, state, levels, advance, stream);
1449 if (advance && multiple)
1451 /* Need to increment our level. */
1453 /* There's more we can do here. */
1456 advance = 0; /* Our parent shouldn't advance also. */
1458 else if (*our_level > 0)
1459 /* We had multiple levels, but used them up; reset to zero. */
1466 /* Print the documentation for ARGP to STREAM; if POST is false, then
1467 everything preceeding a `\v' character in the documentation strings (or
1468 the whole string, for those with none) is printed, otherwise, everything
1469 following the `\v' character (nothing for strings without). Each separate
1470 bit of documentation is separated a blank line, and if PRE_BLANK is true,
1471 then the first is as well. If FIRST_ONLY is true, only the first
1472 occurrence is output. Returns true if anything was output. */
1474 argp_doc (const struct argp *argp, const struct argp_state *state,
1475 int post, int pre_blank, int first_only,
1476 argp_fmtstream_t stream)
1479 const char *inp_text;
1480 size_t inp_text_len = 0;
1481 const char *trans_text;
1484 const struct argp_child *child = argp->children;
1488 char *vt = strchr (argp->doc, '\v');
1495 inp_text_len = vt - argp->doc;
1496 inp_text = __strndup (argp->doc, inp_text_len);
1500 inp_text = post ? 0 : argp->doc;
1501 trans_text = inp_text ? dgettext (argp->argp_domain, inp_text) : NULL;
1504 trans_text = inp_text = 0;
1506 if (argp->help_filter)
1507 /* We have to filter the doc strings. */
1509 input = __argp_input (argp, state);
1511 (*argp->help_filter) (post
1512 ? ARGP_KEY_HELP_POST_DOC
1513 : ARGP_KEY_HELP_PRE_DOC,
1517 text = (const char *) trans_text;
1522 __argp_fmtstream_putc (stream, '\n');
1524 __argp_fmtstream_puts (stream, text);
1526 if (__argp_fmtstream_point (stream) > __argp_fmtstream_lmargin (stream))
1527 __argp_fmtstream_putc (stream, '\n');
1532 if (text && text != trans_text)
1533 free ((char *) text); /* Free TEXT returned from the help filter. */
1535 if (inp_text && inp_text_len)
1536 free ((char *) inp_text); /* We copied INP_TEXT, so free it now. */
1538 if (post && argp->help_filter)
1539 /* Now see if we have to output a ARGP_KEY_HELP_EXTRA text. */
1541 text = (*argp->help_filter) (ARGP_KEY_HELP_EXTRA, 0, input);
1544 if (anything || pre_blank)
1545 __argp_fmtstream_putc (stream, '\n');
1546 __argp_fmtstream_puts (stream, text);
1547 free ((char *) text);
1548 if (__argp_fmtstream_point (stream)
1549 > __argp_fmtstream_lmargin (stream))
1550 __argp_fmtstream_putc (stream, '\n');
1556 while (child->argp && !(first_only && anything))
1558 argp_doc ((child++)->argp, state,
1559 post, anything || pre_blank, first_only,
1565 /* Output a usage message for ARGP to STREAM. If called from
1566 argp_state_help, STATE is the relevent parsing state. FLAGS are from the
1567 set ARGP_HELP_*. NAME is what to use wherever a `program name' is
1570 _help (const struct argp *argp, const struct argp_state *state, FILE *stream,
1571 unsigned flags, char *name)
1573 int anything = 0; /* Whether we've output anything. */
1574 struct hol *hol = 0;
1575 argp_fmtstream_t fs;
1580 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1581 __flockfile (stream);
1584 if (! uparams.valid)
1585 fill_in_uparams (state);
1587 fs = __argp_make_fmtstream (stream, 0, uparams.rmargin, 0);
1590 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1591 __funlockfile (stream);
1596 if (flags & (ARGP_HELP_USAGE | ARGP_HELP_SHORT_USAGE | ARGP_HELP_LONG))
1598 hol = argp_hol (argp, 0);
1600 /* If present, these options always come last. */
1601 hol_set_group (hol, "help", -1);
1602 hol_set_group (hol, "version", -1);
1607 if (flags & (ARGP_HELP_USAGE | ARGP_HELP_SHORT_USAGE))
1608 /* Print a short `Usage:' message. */
1610 int first_pattern = 1, more_patterns;
1611 size_t num_pattern_levels = argp_args_levels (argp);
1612 char *pattern_levels = alloca (num_pattern_levels);
1614 memset (pattern_levels, 0, num_pattern_levels);
1619 int old_wm = __argp_fmtstream_set_wmargin (fs, uparams.usage_indent);
1620 char *levels = pattern_levels;
1623 __argp_fmtstream_printf (fs, "%s %s",
1624 dgettext (argp->argp_domain, "Usage:"),
1627 __argp_fmtstream_printf (fs, "%s %s",
1628 dgettext (argp->argp_domain, " or: "),
1631 /* We set the lmargin as well as the wmargin, because hol_usage
1632 manually wraps options with newline to avoid annoying breaks. */
1633 old_lm = __argp_fmtstream_set_lmargin (fs, uparams.usage_indent);
1635 if (flags & ARGP_HELP_SHORT_USAGE)
1636 /* Just show where the options go. */
1638 if (hol->num_entries > 0)
1639 __argp_fmtstream_puts (fs, dgettext (argp->argp_domain,
1643 /* Actually print the options. */
1645 hol_usage (hol, fs);
1646 flags |= ARGP_HELP_SHORT_USAGE; /* But only do so once. */
1649 more_patterns = argp_args_usage (argp, state, &levels, 1, fs);
1651 __argp_fmtstream_set_wmargin (fs, old_wm);
1652 __argp_fmtstream_set_lmargin (fs, old_lm);
1654 __argp_fmtstream_putc (fs, '\n');
1659 while (more_patterns);
1662 if (flags & ARGP_HELP_PRE_DOC)
1663 anything |= argp_doc (argp, state, 0, 0, 1, fs);
1665 if (flags & ARGP_HELP_SEE)
1667 __argp_fmtstream_printf (fs, dgettext (argp->argp_domain, "\
1668 Try `%s --help' or `%s --usage' for more information.\n"),
1673 if (flags & ARGP_HELP_LONG)
1674 /* Print a long, detailed help message. */
1676 /* Print info about all the options. */
1677 if (hol->num_entries > 0)
1680 __argp_fmtstream_putc (fs, '\n');
1681 hol_help (hol, state, fs);
1686 if (flags & ARGP_HELP_POST_DOC)
1687 /* Print any documentation strings at the end. */
1688 anything |= argp_doc (argp, state, 1, anything, 0, fs);
1690 if ((flags & ARGP_HELP_BUG_ADDR) && argp_program_bug_address)
1693 __argp_fmtstream_putc (fs, '\n');
1694 __argp_fmtstream_printf (fs, dgettext (argp->argp_domain,
1695 "Report bugs to %s.\n"),
1696 argp_program_bug_address);
1700 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1701 __funlockfile (stream);
1707 __argp_fmtstream_free (fs);
1710 /* Output a usage message for ARGP to STREAM. FLAGS are from the set
1711 ARGP_HELP_*. NAME is what to use wherever a `program name' is needed. */
1712 void __argp_help (const struct argp *argp, FILE *stream,
1713 unsigned flags, char *name)
1715 struct argp_state state;
1716 memset (&state, 0, sizeof state);
1717 state.root_argp = argp;
1718 _help (argp, &state, stream, flags, name);
1721 weak_alias (__argp_help, argp_help)
1724 #if ! (defined _LIBC || HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME)
1726 __argp_short_program_name (void)
1728 # if HAVE_DECL_PROGRAM_INVOCATION_NAME
1729 return __argp_base_name (program_invocation_name);
1731 /* FIXME: What now? Miles suggests that it is better to use NULL,
1732 but currently the value is passed on directly to fputs_unlocked,
1733 so that requires more changes. */
1735 # warning No reasonable value to return
1736 # endif /* __GNUC__ */
1742 /* Output, if appropriate, a usage message for STATE to STREAM. FLAGS are
1743 from the set ARGP_HELP_*. */
1745 __argp_state_help (const struct argp_state *state, FILE *stream, unsigned flags)
1747 if ((!state || ! (state->flags & ARGP_NO_ERRS)) && stream)
1749 if (state && (state->flags & ARGP_LONG_ONLY))
1750 flags |= ARGP_HELP_LONG_ONLY;
1752 _help (state ? state->root_argp : 0, state, stream, flags,
1753 state ? state->name : __argp_short_program_name ());
1755 if (!state || ! (state->flags & ARGP_NO_EXIT))
1757 if (flags & ARGP_HELP_EXIT_ERR)
1758 exit (argp_err_exit_status);
1759 if (flags & ARGP_HELP_EXIT_OK)
1765 weak_alias (__argp_state_help, argp_state_help)
1768 /* If appropriate, print the printf string FMT and following args, preceded
1769 by the program name and `:', to stderr, and followed by a `Try ... --help'
1770 message, then exit (1). */
1772 __argp_error (const struct argp_state *state, const char *fmt, ...)
1774 if (!state || !(state->flags & ARGP_NO_ERRS))
1776 FILE *stream = state ? state->err_stream : stderr;
1782 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1783 __flockfile (stream);
1789 if (_IO_fwide (stream, 0) > 0)
1793 if (__asprintf (&buf, fmt, ap) < 0)
1796 __fwprintf (stream, L"%s: %s\n",
1797 state ? state->name : __argp_short_program_name (),
1805 fputs_unlocked (state
1806 ? state->name : __argp_short_program_name (),
1808 putc_unlocked (':', stream);
1809 putc_unlocked (' ', stream);
1811 vfprintf (stream, fmt, ap);
1813 putc_unlocked ('\n', stream);
1816 __argp_state_help (state, stream, ARGP_HELP_STD_ERR);
1820 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1821 __funlockfile (stream);
1827 weak_alias (__argp_error, argp_error)
1830 /* Similar to the standard gnu error-reporting function error(), but will
1831 respect the ARGP_NO_EXIT and ARGP_NO_ERRS flags in STATE, and will print
1832 to STATE->err_stream. This is useful for argument parsing code that is
1833 shared between program startup (when exiting is desired) and runtime
1834 option parsing (when typically an error code is returned instead). The
1835 difference between this function and argp_error is that the latter is for
1836 *parsing errors*, and the former is for other problems that occur during
1837 parsing but don't reflect a (syntactic) problem with the input. */
1839 __argp_failure (const struct argp_state *state, int status, int errnum,
1840 const char *fmt, ...)
1842 if (!state || !(state->flags & ARGP_NO_ERRS))
1844 FILE *stream = state ? state->err_stream : stderr;
1848 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1849 __flockfile (stream);
1853 if (_IO_fwide (stream, 0) > 0)
1854 __fwprintf (stream, L"%s",
1855 state ? state->name : __argp_short_program_name ());
1858 fputs_unlocked (state
1859 ? state->name : __argp_short_program_name (),
1868 if (_IO_fwide (stream, 0) > 0)
1872 if (__asprintf (&buf, fmt, ap) < 0)
1875 __fwprintf (stream, L": %s", buf);
1882 putc_unlocked (':', stream);
1883 putc_unlocked (' ', stream);
1885 vfprintf (stream, fmt, ap);
1896 if (_IO_fwide (stream, 0) > 0)
1897 __fwprintf (stream, L": %s",
1898 __strerror_r (errnum, buf, sizeof (buf)));
1902 char const *s = NULL;
1903 putc_unlocked (':', stream);
1904 putc_unlocked (' ', stream);
1905 #if _LIBC || (HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P)
1906 s = __strerror_r (errnum, buf, sizeof buf);
1907 #elif HAVE_DECL_STRERROR_R
1908 if (__strerror_r (errnum, buf, sizeof buf) == 0)
1912 if (! s && ! (s = strerror (errnum)))
1913 s = dgettext (state->root_argp->argp_domain,
1914 "Unknown system error");
1921 if (_IO_fwide (stream, 0) > 0)
1922 putwc_unlocked (L'\n', stream);
1925 putc_unlocked ('\n', stream);
1927 #if _LIBC || (HAVE_FLOCKFILE && HAVE_FUNLOCKFILE)
1928 __funlockfile (stream);
1931 if (status && (!state || !(state->flags & ARGP_NO_EXIT)))
1937 weak_alias (__argp_failure, argp_failure)