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Contents of /psiconv/trunk/compat/getopt.c

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Revision 30 - (show annotations)
Tue Nov 30 00:20:57 1999 UTC (19 years, 10 months ago) by frodo
File MIME type: text/plain
File size: 30063 byte(s)
(Frodo) Added several files that were forgotten in the compat section...

1 /* Getopt for GNU.
2 NOTE: getopt is now part of the C library, so if you don't know what
3 "Keep this file name-space clean" means, talk to drepper@gnu.org
4 before changing it!
5
6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
7 Free Software Foundation, Inc.
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Library General Public License as
11 published by the Free Software Foundation; either version 2 of the
12 License, or (at your option) any later version.
13
14 The GNU C Library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Library General Public License for more details.
18
19 You should have received a copy of the GNU Library General Public
20 License along with the GNU C Library; see the file COPYING.LIB. If not,
21 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
25 Ditto for AIX 3.2 and <stdlib.h>. */
26 #ifndef _NO_PROTO
27 # define _NO_PROTO
28 #endif
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #if !defined __STDC__ || !__STDC__
35 /* This is a separate conditional since some stdc systems
36 reject `defined (const)'. */
37 # ifndef const
38 # define const
39 # endif
40 #endif
41
42 #include <stdio.h>
43
44 /* Comment out all this code if we are using the GNU C Library, and are not
45 actually compiling the library itself. This code is part of the GNU C
46 Library, but also included in many other GNU distributions. Compiling
47 and linking in this code is a waste when using the GNU C library
48 (especially if it is a shared library). Rather than having every GNU
49 program understand `configure --with-gnu-libc' and omit the object files,
50 it is simpler to just do this in the source for each such file. */
51
52 #define GETOPT_INTERFACE_VERSION 2
53 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
54 # include <gnu-versions.h>
55 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
56 # define ELIDE_CODE
57 # endif
58 #endif
59
60 #ifndef ELIDE_CODE
61
62
63 /* This needs to come after some library #include
64 to get __GNU_LIBRARY__ defined. */
65 #ifdef __GNU_LIBRARY__
66 /* Don't include stdlib.h for non-GNU C libraries because some of them
67 contain conflicting prototypes for getopt. */
68 # include <stdlib.h>
69 # include <unistd.h>
70 #endif /* GNU C library. */
71
72 #ifdef VMS
73 # include <unixlib.h>
74 # if HAVE_STRING_H - 0
75 # include <string.h>
76 # endif
77 #endif
78
79 #ifndef _
80 /* This is for other GNU distributions with internationalized messages.
81 When compiling libc, the _ macro is predefined. */
82 # ifdef HAVE_LIBINTL_H
83 # include <libintl.h>
84 # define _(msgid) gettext (msgid)
85 # else
86 # define _(msgid) (msgid)
87 # endif
88 #endif
89
90 /* This version of `getopt' appears to the caller like standard Unix `getopt'
91 but it behaves differently for the user, since it allows the user
92 to intersperse the options with the other arguments.
93
94 As `getopt' works, it permutes the elements of ARGV so that,
95 when it is done, all the options precede everything else. Thus
96 all application programs are extended to handle flexible argument order.
97
98 Setting the environment variable POSIXLY_CORRECT disables permutation.
99 Then the behavior is completely standard.
100
101 GNU application programs can use a third alternative mode in which
102 they can distinguish the relative order of options and other arguments. */
103
104 #include "getopt.h"
105
106 /* For communication from `getopt' to the caller.
107 When `getopt' finds an option that takes an argument,
108 the argument value is returned here.
109 Also, when `ordering' is RETURN_IN_ORDER,
110 each non-option ARGV-element is returned here. */
111
112 char *optarg;
113
114 /* Index in ARGV of the next element to be scanned.
115 This is used for communication to and from the caller
116 and for communication between successive calls to `getopt'.
117
118 On entry to `getopt', zero means this is the first call; initialize.
119
120 When `getopt' returns -1, this is the index of the first of the
121 non-option elements that the caller should itself scan.
122
123 Otherwise, `optind' communicates from one call to the next
124 how much of ARGV has been scanned so far. */
125
126 /* 1003.2 says this must be 1 before any call. */
127 int optind = 1;
128
129 /* Formerly, initialization of getopt depended on optind==0, which
130 causes problems with re-calling getopt as programs generally don't
131 know that. */
132
133 int __getopt_initialized;
134
135 /* The next char to be scanned in the option-element
136 in which the last option character we returned was found.
137 This allows us to pick up the scan where we left off.
138
139 If this is zero, or a null string, it means resume the scan
140 by advancing to the next ARGV-element. */
141
142 static char *nextchar;
143
144 /* Callers store zero here to inhibit the error message
145 for unrecognized options. */
146
147 int opterr = 1;
148
149 /* Set to an option character which was unrecognized.
150 This must be initialized on some systems to avoid linking in the
151 system's own getopt implementation. */
152
153 int optopt = '?';
154
155 /* Describe how to deal with options that follow non-option ARGV-elements.
156
157 If the caller did not specify anything,
158 the default is REQUIRE_ORDER if the environment variable
159 POSIXLY_CORRECT is defined, PERMUTE otherwise.
160
161 REQUIRE_ORDER means don't recognize them as options;
162 stop option processing when the first non-option is seen.
163 This is what Unix does.
164 This mode of operation is selected by either setting the environment
165 variable POSIXLY_CORRECT, or using `+' as the first character
166 of the list of option characters.
167
168 PERMUTE is the default. We permute the contents of ARGV as we scan,
169 so that eventually all the non-options are at the end. This allows options
170 to be given in any order, even with programs that were not written to
171 expect this.
172
173 RETURN_IN_ORDER is an option available to programs that were written
174 to expect options and other ARGV-elements in any order and that care about
175 the ordering of the two. We describe each non-option ARGV-element
176 as if it were the argument of an option with character code 1.
177 Using `-' as the first character of the list of option characters
178 selects this mode of operation.
179
180 The special argument `--' forces an end of option-scanning regardless
181 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
182 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
183
184 static enum
185 {
186 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
187 } ordering;
188
189 /* Value of POSIXLY_CORRECT environment variable. */
190 static char *posixly_correct;
191
192 #ifdef __GNU_LIBRARY__
193 /* We want to avoid inclusion of string.h with non-GNU libraries
194 because there are many ways it can cause trouble.
195 On some systems, it contains special magic macros that don't work
196 in GCC. */
197 # include <string.h>
198 # define my_index strchr
199 #else
200
201 # if HAVE_STRING_H
202 # include <string.h>
203 # else
204 # include <strings.h>
205 # endif
206
207 /* Avoid depending on library functions or files
208 whose names are inconsistent. */
209
210 #ifndef getenv
211 extern char *getenv ();
212 #endif
213
214 static char *
215 my_index (str, chr)
216 const char *str;
217 int chr;
218 {
219 while (*str)
220 {
221 if (*str == chr)
222 return (char *) str;
223 str++;
224 }
225 return 0;
226 }
227
228 /* If using GCC, we can safely declare strlen this way.
229 If not using GCC, it is ok not to declare it. */
230 #ifdef __GNUC__
231 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
232 That was relevant to code that was here before. */
233 # if (!defined __STDC__ || !__STDC__) && !defined strlen
234 /* gcc with -traditional declares the built-in strlen to return int,
235 and has done so at least since version 2.4.5. -- rms. */
236 extern int strlen (const char *);
237 # endif /* not __STDC__ */
238 #endif /* __GNUC__ */
239
240 #endif /* not __GNU_LIBRARY__ */
241
242 /* Handle permutation of arguments. */
243
244 /* Describe the part of ARGV that contains non-options that have
245 been skipped. `first_nonopt' is the index in ARGV of the first of them;
246 `last_nonopt' is the index after the last of them. */
247
248 static int first_nonopt;
249 static int last_nonopt;
250
251 #ifdef _LIBC
252 /* Bash 2.0 gives us an environment variable containing flags
253 indicating ARGV elements that should not be considered arguments. */
254
255 /* Defined in getopt_init.c */
256 extern char *__getopt_nonoption_flags;
257
258 static int nonoption_flags_max_len;
259 static int nonoption_flags_len;
260
261 static int original_argc;
262 static char *const *original_argv;
263
264 /* Make sure the environment variable bash 2.0 puts in the environment
265 is valid for the getopt call we must make sure that the ARGV passed
266 to getopt is that one passed to the process. */
267 static void
268 __attribute__ ((unused))
269 store_args_and_env (int argc, char *const *argv)
270 {
271 /* XXX This is no good solution. We should rather copy the args so
272 that we can compare them later. But we must not use malloc(3). */
273 original_argc = argc;
274 original_argv = argv;
275 }
276 # ifdef text_set_element
277 text_set_element (__libc_subinit, store_args_and_env);
278 # endif /* text_set_element */
279
280 # define SWAP_FLAGS(ch1, ch2) \
281 if (nonoption_flags_len > 0) \
282 { \
283 char __tmp = __getopt_nonoption_flags[ch1]; \
284 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
285 __getopt_nonoption_flags[ch2] = __tmp; \
286 }
287 #else /* !_LIBC */
288 # define SWAP_FLAGS(ch1, ch2)
289 #endif /* _LIBC */
290
291 /* Exchange two adjacent subsequences of ARGV.
292 One subsequence is elements [first_nonopt,last_nonopt)
293 which contains all the non-options that have been skipped so far.
294 The other is elements [last_nonopt,optind), which contains all
295 the options processed since those non-options were skipped.
296
297 `first_nonopt' and `last_nonopt' are relocated so that they describe
298 the new indices of the non-options in ARGV after they are moved. */
299
300 #if defined __STDC__ && __STDC__
301 static void exchange (char **);
302 #endif
303
304 static void
305 exchange (argv)
306 char **argv;
307 {
308 int bottom = first_nonopt;
309 int middle = last_nonopt;
310 int top = optind;
311 char *tem;
312
313 /* Exchange the shorter segment with the far end of the longer segment.
314 That puts the shorter segment into the right place.
315 It leaves the longer segment in the right place overall,
316 but it consists of two parts that need to be swapped next. */
317
318 #ifdef _LIBC
319 /* First make sure the handling of the `__getopt_nonoption_flags'
320 string can work normally. Our top argument must be in the range
321 of the string. */
322 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
323 {
324 /* We must extend the array. The user plays games with us and
325 presents new arguments. */
326 char *new_str = malloc (top + 1);
327 if (new_str == NULL)
328 nonoption_flags_len = nonoption_flags_max_len = 0;
329 else
330 {
331 memset (__mempcpy (new_str, __getopt_nonoption_flags,
332 nonoption_flags_max_len),
333 '\0', top + 1 - nonoption_flags_max_len);
334 nonoption_flags_max_len = top + 1;
335 __getopt_nonoption_flags = new_str;
336 }
337 }
338 #endif
339
340 while (top > middle && middle > bottom)
341 {
342 if (top - middle > middle - bottom)
343 {
344 /* Bottom segment is the short one. */
345 int len = middle - bottom;
346 register int i;
347
348 /* Swap it with the top part of the top segment. */
349 for (i = 0; i < len; i++)
350 {
351 tem = argv[bottom + i];
352 argv[bottom + i] = argv[top - (middle - bottom) + i];
353 argv[top - (middle - bottom) + i] = tem;
354 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
355 }
356 /* Exclude the moved bottom segment from further swapping. */
357 top -= len;
358 }
359 else
360 {
361 /* Top segment is the short one. */
362 int len = top - middle;
363 register int i;
364
365 /* Swap it with the bottom part of the bottom segment. */
366 for (i = 0; i < len; i++)
367 {
368 tem = argv[bottom + i];
369 argv[bottom + i] = argv[middle + i];
370 argv[middle + i] = tem;
371 SWAP_FLAGS (bottom + i, middle + i);
372 }
373 /* Exclude the moved top segment from further swapping. */
374 bottom += len;
375 }
376 }
377
378 /* Update records for the slots the non-options now occupy. */
379
380 first_nonopt += (optind - last_nonopt);
381 last_nonopt = optind;
382 }
383
384 /* Initialize the internal data when the first call is made. */
385
386 #if defined __STDC__ && __STDC__
387 static const char *_getopt_initialize (int, char *const *, const char *);
388 #endif
389 static const char *
390 _getopt_initialize (argc, argv, optstring)
391 int argc;
392 char *const *argv;
393 const char *optstring;
394 {
395 /* Start processing options with ARGV-element 1 (since ARGV-element 0
396 is the program name); the sequence of previously skipped
397 non-option ARGV-elements is empty. */
398
399 first_nonopt = last_nonopt = optind;
400
401 nextchar = NULL;
402
403 posixly_correct = getenv ("POSIXLY_CORRECT");
404
405 /* Determine how to handle the ordering of options and nonoptions. */
406
407 if (optstring[0] == '-')
408 {
409 ordering = RETURN_IN_ORDER;
410 ++optstring;
411 }
412 else if (optstring[0] == '+')
413 {
414 ordering = REQUIRE_ORDER;
415 ++optstring;
416 }
417 else if (posixly_correct != NULL)
418 ordering = REQUIRE_ORDER;
419 else
420 ordering = PERMUTE;
421
422 #ifdef _LIBC
423 if (posixly_correct == NULL
424 && argc == original_argc && argv == original_argv)
425 {
426 if (nonoption_flags_max_len == 0)
427 {
428 if (__getopt_nonoption_flags == NULL
429 || __getopt_nonoption_flags[0] == '\0')
430 nonoption_flags_max_len = -1;
431 else
432 {
433 const char *orig_str = __getopt_nonoption_flags;
434 int len = nonoption_flags_max_len = strlen (orig_str);
435 if (nonoption_flags_max_len < argc)
436 nonoption_flags_max_len = argc;
437 __getopt_nonoption_flags =
438 (char *) malloc (nonoption_flags_max_len);
439 if (__getopt_nonoption_flags == NULL)
440 nonoption_flags_max_len = -1;
441 else
442 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
443 '\0', nonoption_flags_max_len - len);
444 }
445 }
446 nonoption_flags_len = nonoption_flags_max_len;
447 }
448 else
449 nonoption_flags_len = 0;
450 #endif
451
452 return optstring;
453 }
454
455 /* Scan elements of ARGV (whose length is ARGC) for option characters
456 given in OPTSTRING.
457
458 If an element of ARGV starts with '-', and is not exactly "-" or "--",
459 then it is an option element. The characters of this element
460 (aside from the initial '-') are option characters. If `getopt'
461 is called repeatedly, it returns successively each of the option characters
462 from each of the option elements.
463
464 If `getopt' finds another option character, it returns that character,
465 updating `optind' and `nextchar' so that the next call to `getopt' can
466 resume the scan with the following option character or ARGV-element.
467
468 If there are no more option characters, `getopt' returns -1.
469 Then `optind' is the index in ARGV of the first ARGV-element
470 that is not an option. (The ARGV-elements have been permuted
471 so that those that are not options now come last.)
472
473 OPTSTRING is a string containing the legitimate option characters.
474 If an option character is seen that is not listed in OPTSTRING,
475 return '?' after printing an error message. If you set `opterr' to
476 zero, the error message is suppressed but we still return '?'.
477
478 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
479 so the following text in the same ARGV-element, or the text of the following
480 ARGV-element, is returned in `optarg'. Two colons mean an option that
481 wants an optional arg; if there is text in the current ARGV-element,
482 it is returned in `optarg', otherwise `optarg' is set to zero.
483
484 If OPTSTRING starts with `-' or `+', it requests different methods of
485 handling the non-option ARGV-elements.
486 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
487
488 Long-named options begin with `--' instead of `-'.
489 Their names may be abbreviated as long as the abbreviation is unique
490 or is an exact match for some defined option. If they have an
491 argument, it follows the option name in the same ARGV-element, separated
492 from the option name by a `=', or else the in next ARGV-element.
493 When `getopt' finds a long-named option, it returns 0 if that option's
494 `flag' field is nonzero, the value of the option's `val' field
495 if the `flag' field is zero.
496
497 The elements of ARGV aren't really const, because we permute them.
498 But we pretend they're const in the prototype to be compatible
499 with other systems.
500
501 LONGOPTS is a vector of `struct option' terminated by an
502 element containing a name which is zero.
503
504 LONGIND returns the index in LONGOPT of the long-named option found.
505 It is only valid when a long-named option has been found by the most
506 recent call.
507
508 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
509 long-named options. */
510
511 int
512 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
513 int argc;
514 char *const *argv;
515 const char *optstring;
516 const struct option *longopts;
517 int *longind;
518 int long_only;
519 {
520 optarg = NULL;
521
522 if (optind == 0 || !__getopt_initialized)
523 {
524 if (optind == 0)
525 optind = 1; /* Don't scan ARGV[0], the program name. */
526 optstring = _getopt_initialize (argc, argv, optstring);
527 __getopt_initialized = 1;
528 }
529
530 /* Test whether ARGV[optind] points to a non-option argument.
531 Either it does not have option syntax, or there is an environment flag
532 from the shell indicating it is not an option. The later information
533 is only used when the used in the GNU libc. */
534 #ifdef _LIBC
535 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
536 || (optind < nonoption_flags_len \
537 && __getopt_nonoption_flags[optind] == '1'))
538 #else
539 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
540 #endif
541
542 if (nextchar == NULL || *nextchar == '\0')
543 {
544 /* Advance to the next ARGV-element. */
545
546 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
547 moved back by the user (who may also have changed the arguments). */
548 if (last_nonopt > optind)
549 last_nonopt = optind;
550 if (first_nonopt > optind)
551 first_nonopt = optind;
552
553 if (ordering == PERMUTE)
554 {
555 /* If we have just processed some options following some non-options,
556 exchange them so that the options come first. */
557
558 if (first_nonopt != last_nonopt && last_nonopt != optind)
559 exchange ((char **) argv);
560 else if (last_nonopt != optind)
561 first_nonopt = optind;
562
563 /* Skip any additional non-options
564 and extend the range of non-options previously skipped. */
565
566 while (optind < argc && NONOPTION_P)
567 optind++;
568 last_nonopt = optind;
569 }
570
571 /* The special ARGV-element `--' means premature end of options.
572 Skip it like a null option,
573 then exchange with previous non-options as if it were an option,
574 then skip everything else like a non-option. */
575
576 if (optind != argc && !strcmp (argv[optind], "--"))
577 {
578 optind++;
579
580 if (first_nonopt != last_nonopt && last_nonopt != optind)
581 exchange ((char **) argv);
582 else if (first_nonopt == last_nonopt)
583 first_nonopt = optind;
584 last_nonopt = argc;
585
586 optind = argc;
587 }
588
589 /* If we have done all the ARGV-elements, stop the scan
590 and back over any non-options that we skipped and permuted. */
591
592 if (optind == argc)
593 {
594 /* Set the next-arg-index to point at the non-options
595 that we previously skipped, so the caller will digest them. */
596 if (first_nonopt != last_nonopt)
597 optind = first_nonopt;
598 return -1;
599 }
600
601 /* If we have come to a non-option and did not permute it,
602 either stop the scan or describe it to the caller and pass it by. */
603
604 if (NONOPTION_P)
605 {
606 if (ordering == REQUIRE_ORDER)
607 return -1;
608 optarg = argv[optind++];
609 return 1;
610 }
611
612 /* We have found another option-ARGV-element.
613 Skip the initial punctuation. */
614
615 nextchar = (argv[optind] + 1
616 + (longopts != NULL && argv[optind][1] == '-'));
617 }
618
619 /* Decode the current option-ARGV-element. */
620
621 /* Check whether the ARGV-element is a long option.
622
623 If long_only and the ARGV-element has the form "-f", where f is
624 a valid short option, don't consider it an abbreviated form of
625 a long option that starts with f. Otherwise there would be no
626 way to give the -f short option.
627
628 On the other hand, if there's a long option "fubar" and
629 the ARGV-element is "-fu", do consider that an abbreviation of
630 the long option, just like "--fu", and not "-f" with arg "u".
631
632 This distinction seems to be the most useful approach. */
633
634 if (longopts != NULL
635 && (argv[optind][1] == '-'
636 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
637 {
638 char *nameend;
639 const struct option *p;
640 const struct option *pfound = NULL;
641 int exact = 0;
642 int ambig = 0;
643 int indfound = -1;
644 int option_index;
645
646 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
647 /* Do nothing. */ ;
648
649 /* Test all long options for either exact match
650 or abbreviated matches. */
651 for (p = longopts, option_index = 0; p->name; p++, option_index++)
652 if (!strncmp (p->name, nextchar, nameend - nextchar))
653 {
654 if ((unsigned int) (nameend - nextchar)
655 == (unsigned int) strlen (p->name))
656 {
657 /* Exact match found. */
658 pfound = p;
659 indfound = option_index;
660 exact = 1;
661 break;
662 }
663 else if (pfound == NULL)
664 {
665 /* First nonexact match found. */
666 pfound = p;
667 indfound = option_index;
668 }
669 else
670 /* Second or later nonexact match found. */
671 ambig = 1;
672 }
673
674 if (ambig && !exact)
675 {
676 if (opterr)
677 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
678 argv[0], argv[optind]);
679 nextchar += strlen (nextchar);
680 optind++;
681 optopt = 0;
682 return '?';
683 }
684
685 if (pfound != NULL)
686 {
687 option_index = indfound;
688 optind++;
689 if (*nameend)
690 {
691 /* Don't test has_arg with >, because some C compilers don't
692 allow it to be used on enums. */
693 if (pfound->has_arg)
694 optarg = nameend + 1;
695 else
696 {
697 if (opterr)
698 {
699 if (argv[optind - 1][1] == '-')
700 /* --option */
701 fprintf (stderr,
702 _("%s: option `--%s' doesn't allow an argument\n"),
703 argv[0], pfound->name);
704 else
705 /* +option or -option */
706 fprintf (stderr,
707 _("%s: option `%c%s' doesn't allow an argument\n"),
708 argv[0], argv[optind - 1][0], pfound->name);
709 }
710
711 nextchar += strlen (nextchar);
712
713 optopt = pfound->val;
714 return '?';
715 }
716 }
717 else if (pfound->has_arg == 1)
718 {
719 if (optind < argc)
720 optarg = argv[optind++];
721 else
722 {
723 if (opterr)
724 fprintf (stderr,
725 _("%s: option `%s' requires an argument\n"),
726 argv[0], argv[optind - 1]);
727 nextchar += strlen (nextchar);
728 optopt = pfound->val;
729 return optstring[0] == ':' ? ':' : '?';
730 }
731 }
732 nextchar += strlen (nextchar);
733 if (longind != NULL)
734 *longind = option_index;
735 if (pfound->flag)
736 {
737 *(pfound->flag) = pfound->val;
738 return 0;
739 }
740 return pfound->val;
741 }
742
743 /* Can't find it as a long option. If this is not getopt_long_only,
744 or the option starts with '--' or is not a valid short
745 option, then it's an error.
746 Otherwise interpret it as a short option. */
747 if (!long_only || argv[optind][1] == '-'
748 || my_index (optstring, *nextchar) == NULL)
749 {
750 if (opterr)
751 {
752 if (argv[optind][1] == '-')
753 /* --option */
754 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
755 argv[0], nextchar);
756 else
757 /* +option or -option */
758 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
759 argv[0], argv[optind][0], nextchar);
760 }
761 nextchar = (char *) "";
762 optind++;
763 optopt = 0;
764 return '?';
765 }
766 }
767
768 /* Look at and handle the next short option-character. */
769
770 {
771 char c = *nextchar++;
772 char *temp = my_index (optstring, c);
773
774 /* Increment `optind' when we start to process its last character. */
775 if (*nextchar == '\0')
776 ++optind;
777
778 if (temp == NULL || c == ':')
779 {
780 if (opterr)
781 {
782 if (posixly_correct)
783 /* 1003.2 specifies the format of this message. */
784 fprintf (stderr, _("%s: illegal option -- %c\n"),
785 argv[0], c);
786 else
787 fprintf (stderr, _("%s: invalid option -- %c\n"),
788 argv[0], c);
789 }
790 optopt = c;
791 return '?';
792 }
793 /* Convenience. Treat POSIX -W foo same as long option --foo */
794 if (temp[0] == 'W' && temp[1] == ';')
795 {
796 char *nameend;
797 const struct option *p;
798 const struct option *pfound = NULL;
799 int exact = 0;
800 int ambig = 0;
801 int indfound = 0;
802 int option_index;
803
804 /* This is an option that requires an argument. */
805 if (*nextchar != '\0')
806 {
807 optarg = nextchar;
808 /* If we end this ARGV-element by taking the rest as an arg,
809 we must advance to the next element now. */
810 optind++;
811 }
812 else if (optind == argc)
813 {
814 if (opterr)
815 {
816 /* 1003.2 specifies the format of this message. */
817 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
818 argv[0], c);
819 }
820 optopt = c;
821 if (optstring[0] == ':')
822 c = ':';
823 else
824 c = '?';
825 return c;
826 }
827 else
828 /* We already incremented `optind' once;
829 increment it again when taking next ARGV-elt as argument. */
830 optarg = argv[optind++];
831
832 /* optarg is now the argument, see if it's in the
833 table of longopts. */
834
835 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
836 /* Do nothing. */ ;
837
838 /* Test all long options for either exact match
839 or abbreviated matches. */
840 for (p = longopts, option_index = 0; p->name; p++, option_index++)
841 if (!strncmp (p->name, nextchar, nameend - nextchar))
842 {
843 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
844 {
845 /* Exact match found. */
846 pfound = p;
847 indfound = option_index;
848 exact = 1;
849 break;
850 }
851 else if (pfound == NULL)
852 {
853 /* First nonexact match found. */
854 pfound = p;
855 indfound = option_index;
856 }
857 else
858 /* Second or later nonexact match found. */
859 ambig = 1;
860 }
861 if (ambig && !exact)
862 {
863 if (opterr)
864 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
865 argv[0], argv[optind]);
866 nextchar += strlen (nextchar);
867 optind++;
868 return '?';
869 }
870 if (pfound != NULL)
871 {
872 option_index = indfound;
873 if (*nameend)
874 {
875 /* Don't test has_arg with >, because some C compilers don't
876 allow it to be used on enums. */
877 if (pfound->has_arg)
878 optarg = nameend + 1;
879 else
880 {
881 if (opterr)
882 fprintf (stderr, _("\
883 %s: option `-W %s' doesn't allow an argument\n"),
884 argv[0], pfound->name);
885
886 nextchar += strlen (nextchar);
887 return '?';
888 }
889 }
890 else if (pfound->has_arg == 1)
891 {
892 if (optind < argc)
893 optarg = argv[optind++];
894 else
895 {
896 if (opterr)
897 fprintf (stderr,
898 _("%s: option `%s' requires an argument\n"),
899 argv[0], argv[optind - 1]);
900 nextchar += strlen (nextchar);
901 return optstring[0] == ':' ? ':' : '?';
902 }
903 }
904 nextchar += strlen (nextchar);
905 if (longind != NULL)
906 *longind = option_index;
907 if (pfound->flag)
908 {
909 *(pfound->flag) = pfound->val;
910 return 0;
911 }
912 return pfound->val;
913 }
914 nextchar = NULL;
915 return 'W'; /* Let the application handle it. */
916 }
917 if (temp[1] == ':')
918 {
919 if (temp[2] == ':')
920 {
921 /* This is an option that accepts an argument optionally. */
922 if (*nextchar != '\0')
923 {
924 optarg = nextchar;
925 optind++;
926 }
927 else
928 optarg = NULL;
929 nextchar = NULL;
930 }
931 else
932 {
933 /* This is an option that requires an argument. */
934 if (*nextchar != '\0')
935 {
936 optarg = nextchar;
937 /* If we end this ARGV-element by taking the rest as an arg,
938 we must advance to the next element now. */
939 optind++;
940 }
941 else if (optind == argc)
942 {
943 if (opterr)
944 {
945 /* 1003.2 specifies the format of this message. */
946 fprintf (stderr,
947 _("%s: option requires an argument -- %c\n"),
948 argv[0], c);
949 }
950 optopt = c;
951 if (optstring[0] == ':')
952 c = ':';
953 else
954 c = '?';
955 }
956 else
957 /* We already incremented `optind' once;
958 increment it again when taking next ARGV-elt as argument. */
959 optarg = argv[optind++];
960 nextchar = NULL;
961 }
962 }
963 return c;
964 }
965 }
966
967 int
968 getopt (argc, argv, optstring)
969 int argc;
970 char *const *argv;
971 const char *optstring;
972 {
973 return _getopt_internal (argc, argv, optstring,
974 (const struct option *) 0,
975 (int *) 0,
976 0);
977 }
978
979 #endif /* Not ELIDE_CODE. */
980
981 #ifdef TEST
982
983 /* Compile with -DTEST to make an executable for use in testing
984 the above definition of `getopt'. */
985
986 int
987 main (argc, argv)
988 int argc;
989 char **argv;
990 {
991 int c;
992 int digit_optind = 0;
993
994 while (1)
995 {
996 int this_option_optind = optind ? optind : 1;
997
998 c = getopt (argc, argv, "abc:d:0123456789");
999 if (c == -1)
1000 break;
1001
1002 switch (c)
1003 {
1004 case '0':
1005 case '1':
1006 case '2':
1007 case '3':
1008 case '4':
1009 case '5':
1010 case '6':
1011 case '7':
1012 case '8':
1013 case '9':
1014 if (digit_optind != 0 && digit_optind != this_option_optind)
1015 printf ("digits occur in two different argv-elements.\n");
1016 digit_optind = this_option_optind;
1017 printf ("option %c\n", c);
1018 break;
1019
1020 case 'a':
1021 printf ("option a\n");
1022 break;
1023
1024 case 'b':
1025 printf ("option b\n");
1026 break;
1027
1028 case 'c':
1029 printf ("option c with value `%s'\n", optarg);
1030 break;
1031
1032 case '?':
1033 break;
1034
1035 default:
1036 printf ("?? getopt returned character code 0%o ??\n", c);
1037 }
1038 }
1039
1040 if (optind < argc)
1041 {
1042 printf ("non-option ARGV-elements: ");
1043 while (optind < argc)
1044 printf ("%s ", argv[optind++]);
1045 printf ("\n");
1046 }
1047
1048 exit (0);
1049 }
1050
1051 #endif /* TEST */

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