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1 | /* -*-c-*- |
2 | * |
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3 | * Options parsing, similar to GNU @getopt_long@ |
4 | * |
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5 | * (c) 1996 Straylight/Edgeware |
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6 | */ |
7 | |
8 | /*----- Licensing notice --------------------------------------------------* |
9 | * |
10 | * This file is part of many programs. |
11 | * |
12 | * `mdwopt' is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
16 | * |
17 | * `mdwopt' is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
21 | * |
22 | * You should have received a copy of the GNU Library General Public |
4033d96b |
23 | * License along with `mdwopt'; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
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26 | */ |
27 | |
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28 | /*----- External dependencies ---------------------------------------------*/ |
29 | |
30 | #include <ctype.h> |
31 | #include <stdio.h> |
32 | #include <stdlib.h> |
33 | #include <string.h> |
34 | |
35 | #include "mdwopt.h" |
36 | |
37 | /*----- Configuration things ----------------------------------------------*/ |
38 | |
39 | #if defined(__riscos) |
40 | # define PATHSEP '.' |
41 | #elif defined(__OS2__) || defined(__MSDOS__) || defined(__WINNT__) |
42 | # define PATHSEP '\\' |
43 | #else /* Assume a sane filing system */ |
44 | # define PATHSEP '/' |
45 | #endif |
46 | |
47 | /*----- Global variables --------------------------------------------------*/ |
48 | |
49 | mdwopt_data mdwopt_global = {0, 0, 0, 1, 0, 0, 0, 0, 0}; |
50 | |
51 | enum { |
379c3233 |
52 | ORD_PERMUTE = 0, /* Permute the options (default) */ |
53 | ORD_RETURN = 1, /* Return non-option things */ |
54 | ORD_POSIX = 2, /* Do POSIX-type hacking */ |
55 | ORD_NEGATE = 4 /* Magic negate-next-thing flag */ |
b91e2391 |
56 | }; |
57 | |
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58 | /*----- Word splitting ----------------------------------------------------*/ |
59 | |
60 | #ifdef BUILDING_MLIB |
61 | # include "str.h" |
62 | # define qword str_qword |
63 | #else |
64 | |
65 | /* --- @qword@ --- * |
66 | * |
67 | * Arguments: @char **pp@ = address of pointer into string |
68 | * @unsigned f@ = various flags |
69 | * |
70 | * Returns: Pointer to the next space-separated possibly-quoted word from |
71 | * the string, or null. |
72 | * |
73 | * Use: Fetches the next word from a string. If the flag |
74 | * @STRF_QUOTE@ is set, the `\' character acts as an escape, and |
75 | * single and double quotes protect whitespace. |
76 | */ |
77 | |
78 | #define STRF_QUOTE 1u |
79 | |
80 | static char *qword(char **pp, unsigned f) |
81 | { |
82 | char *p = *pp, *q, *qq; |
83 | int st = 0, pst = 0; |
84 | |
85 | /* --- Preliminaries --- */ |
86 | |
87 | if (!p) |
88 | return (0); |
89 | while (isspace((unsigned char)*p)) |
90 | p++; |
91 | if (!*p) { |
92 | *pp = 0; |
93 | return (0); |
94 | } |
95 | |
96 | /* --- Main work --- */ |
97 | |
98 | for (q = qq = p; *q; q++) { |
99 | switch (st) { |
100 | case '\\': |
101 | *qq++ = *q; |
102 | st = pst; |
103 | break; |
104 | case '\'': |
105 | case '\"': |
106 | if (*q == st) |
107 | st = pst = 0; |
108 | else if (*q == '\\') |
109 | st = '\\'; |
110 | else |
111 | *qq++ = *q; |
112 | break; |
113 | default: |
114 | if (isspace((unsigned char)*q)) { |
115 | do q++; while (*q && isspace((unsigned char)*q)); |
116 | goto done; |
117 | } else if (!(f & STRF_QUOTE)) |
118 | goto stdchar; |
119 | switch (*q) { |
120 | case '\\': |
121 | st = '\\'; |
122 | break; |
123 | case '\'': |
124 | case '\"': |
125 | st = pst = *q; |
126 | break; |
127 | default: |
128 | stdchar: |
129 | *qq++ = *q; |
130 | break; |
131 | } |
132 | } |
133 | } |
134 | |
135 | /* --- Finished --- */ |
136 | |
137 | done: |
138 | *pp = *q ? q : 0; |
139 | *qq++ = 0; |
140 | return (p); |
141 | } |
142 | |
143 | #endif |
144 | |
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145 | /*----- Main code ---------------------------------------------------------*/ |
146 | |
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147 | /* --- @nextword@ --- * |
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148 | * |
149 | * Arguments: @int argc@ = number of command line options |
150 | * @char *argv[]@ = pointer to command line options |
151 | * @mdwopt_data *data@ = pointer to persistent state |
152 | * |
153 | * Returns: Pointer to the next word to handle, or 0 |
154 | * |
155 | * Use: Extracts the next word from the command line or environment |
156 | * variable. |
157 | */ |
158 | |
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159 | static char *nextword(int argc, char *const *argv, mdwopt_data *data) |
b91e2391 |
160 | { |
161 | if (data->ind == -1) { |
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162 | char *p; |
163 | if ((p = qword(&data->env, STRF_QUOTE)) != 0) |
164 | return (p); |
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165 | data->ind = 1; |
166 | } |
167 | |
168 | if (data->next == argc) |
169 | return (0); |
170 | return (argv[data->next++]); |
171 | } |
172 | |
379c3233 |
173 | /* --- @permute@ --- * |
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174 | * |
175 | * Arguments: @char *argv[]@ = pointer to command line arguments |
176 | * @mdwopt_data *data@ = pointer to persistent data |
177 | * |
178 | * Returns: -- |
179 | * |
180 | * Use: Moves a command line option into the right place. |
181 | */ |
182 | |
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183 | static void permute(char *const *argv, mdwopt_data *data) |
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184 | { |
185 | char **v = (char **)argv; |
186 | if (data->ind != -1) { |
187 | int i = data->next - 1; |
188 | char *p = v[i]; |
189 | while (i > data->ind) { |
190 | v[i] = v[i - 1]; |
191 | i--; |
192 | } |
193 | v[i] = p; |
194 | data->ind++; |
195 | } |
196 | } |
197 | |
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198 | /* --- @findOpt@ --- * |
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199 | * |
200 | * Arguments: @int o@ = which option to search for |
201 | * @const char *shortopt@ = short options string to search |
202 | * @mdwopt_data *data@ = pointer to persistant state |
203 | * |
204 | * Returns: Pointer to rest of short options string (including magic |
205 | * characters) |
206 | * |
207 | * Use: Looks up a short option in the given string. |
208 | */ |
209 | |
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210 | static const char *findOpt(int o, const char *shortopt, |
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211 | mdwopt_data *data) |
212 | { |
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213 | const char *p = shortopt; |
b91e2391 |
214 | for (;;) { |
4ab923c4 |
215 | if (!*p) |
b91e2391 |
216 | return (0); |
217 | |
379c3233 |
218 | if (o != *p || (p[1] != '+' && data->order & ORD_NEGATE)) { |
4ab923c4 |
219 | p++; |
220 | while (*p == '+') |
221 | p++; |
222 | while (*p == ':') |
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223 | p++; |
b91e2391 |
224 | } |
225 | else |
226 | return (p + 1); |
227 | } |
228 | } |
229 | |
230 | /* --- @mdwopt@ --- * |
231 | * |
232 | * Arguments: @int argc@ = number of command line arguments |
233 | * @char * const *argv@ = pointer to command line arguments |
234 | * @const char *shortopt@ = pointer to short options information |
235 | * @const struct option *longopts@ = pointer to long opts info |
236 | * @int *longind@ = where to store matched longopt |
237 | * @mdwopt_data *data@ = persistent state for the parser |
238 | * @int flags@ = various useful flags |
239 | * |
240 | * Returns: Value of option found next, or an error character, or |
241 | * @EOF@ for the last thing. |
242 | * |
243 | * Use: Reads options. The routine should be more-or-less compatible |
244 | * with standard getopts, although it provides many more |
245 | * features even than the standard GNU implementation. |
246 | * |
247 | * The precise manner of options parsing is determined by |
248 | * various flag settings, which are described below. By setting |
249 | * flag values appropriately, you can achieve behaviour very |
250 | * similar to most other getopt routines. |
251 | * |
252 | * |
253 | * How options parsing appears to users |
254 | * |
255 | * A command line consists of a number of `words' (which may |
256 | * contain spaces, according to various shell quoting |
257 | * conventions). A word may be an option, an argument to an |
258 | * option, or a non-option. An option begins with a special |
259 | * character, usually `%|-|%', although `%|+|%' is also used |
260 | * sometimes. As special exceptions, the word containing only a |
261 | * `%|-|%' is considered to be a non-option, since it usually |
262 | * represents standard input or output as a filename, and the |
263 | * word containing a double-dash `%|--|%' is used to mark all |
264 | * following words as being non-options regardless of their |
265 | * initial character. |
266 | * |
267 | * Traditionally, all words after the first non-option have been |
268 | * considered to be non-options automatically, so that options |
269 | * must be specified before filenames. However, this |
270 | * implementation can extract all the options from the command |
271 | * line regardless of their position. This can usually be |
272 | * disabled by setting one of the environment variables |
273 | * `%|POSIXLY_CORRECT|%' or `%|_POSIX_OPTION_ORDER|%'. |
274 | * |
275 | * There are two different styles of options: `short' and |
276 | * `long'. |
277 | * |
278 | * Short options are the sort which Unix has known for ages: an |
279 | * option is a single letter, preceded by a `%|-|%'. Short |
280 | * options can be joined together to save space (and possibly to |
281 | * make silly words): e.g., instead of giving options |
282 | * `%|-x -y|%', a user could write `%|-xy|%'. Some short |
283 | * options can have arguments, which appear after the option |
284 | * letter, either immediately following, or in the next `word' |
285 | * (so an option with an argument could be written as |
286 | * `%|-o foo|%' or as `%|-ofoo|%'). Note that options with |
287 | * optional arguments must be written in the second style. |
288 | * |
289 | * When a short option controls a flag setting, it is sometimes |
290 | * possible to explicitly turn the flag off, as well as turning |
291 | * it on, (usually to override default options). This is |
292 | * usually done by using a `%|+|%' instead of a `%|-|%' to |
293 | * introduce the option. |
294 | * |
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295 | * Long options, as popularized by the GNU utilities, are given |
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296 | * long-ish memorable names, preceded by a double-dash `%|--|%'. |
297 | * Since their names are more than a single character, long |
298 | * options can't be combined in the same way as short options. |
299 | * Arguments to long options may be given either in the same |
300 | * `word', separated from the option name by an equals sign, or |
301 | * in the following `word'. |
302 | * |
303 | * Long option names can be abbreviated if necessary, as long |
304 | * as the abbreviation is unique. This means that options can |
305 | * have sensible and memorable names but still not require much |
306 | * typing from an experienced user. |
307 | * |
308 | * Like short options, long options can control flag settings. |
309 | * The options to manipulate these settings come in pairs: an |
310 | * option of the form `%|--set-flag|%' might set the flag, while |
311 | * an option of the form `%|--no-set-flag|%' might clear it. |
312 | * |
313 | * It is usual for applications to provide both short and long |
314 | * options with identical behaviour. Some applications with |
315 | * lots of options may only provide long options (although they |
316 | * will often be only two or three characters long). In this |
317 | * case, long options can be preceded with a single `%|-|%' |
318 | * character, and negated by a `%|+|%' character. |
319 | * |
320 | * Finally, some (older) programs accept arguments of the form |
321 | * `%%@.{"-"<number>}%%', to set some numerical parameter, |
322 | * typically a line count of some kind. |
323 | * |
324 | * |
325 | * How programs parse options |
326 | * |
327 | * An application parses its options by calling mdwopt |
328 | * repeatedly. Each time it is called, mdwopt returns a value |
329 | * describing the option just read, and stores information about |
330 | * the option in a data block. The value %$-1$% is returned |
331 | * when there are no more options to be read. The `%|?|%' |
332 | * character is returned when an error is encountered. |
333 | * |
334 | * Before starting to parse options, the value @data->ind@ must |
335 | * be set to 0 or 1. The value of @data->err@ can also be set, |
336 | * to choose whether errors are reported by mdwopt. |
337 | * |
338 | * The program's `@argc@' and `@argv@' arguments are passed to |
339 | * the options parser, so that it can read the command line. A |
340 | * flags word is also passed, allowing the program fine control |
341 | * over parsing. The flags are described above. |
342 | * |
343 | * Short options are described by a string, which once upon a |
344 | * time just contained the permitted option characters. Now the |
345 | * options string begins with a collection of flag characters, |
346 | * and various flag characters can be put after options |
347 | * characters to change their properties. |
348 | * |
349 | * If the first character of the short options string is |
350 | * `%|+|%', `%|-|%' or `%|!|%', the order in which options are |
351 | * read is modified, as follows: |
352 | * |
353 | * `%|+|%' forces the POSIX order to be used. As soon as a non- |
354 | * option is found, mdwopt returns %$-1$%. |
355 | * |
356 | * `%|-|%' makes mdwopt treat non-options as being `special' |
357 | * sorts of option. When a non-option word is found, the |
358 | * value 0 is returned, and the actual text of the word |
359 | * is stored as being the option's argument. |
360 | * |
361 | * `%|!|%' forces the default order to be used. The entire |
362 | * command line is scanned for options, which are |
363 | * returned in order. However, during this process, |
364 | * the options are moved in the @argv@ array, so that |
365 | * they appear before the non- options. |
366 | * |
367 | * A `%|:|%' character may be placed after the ordering flag (or |
368 | * at the very beginning if no ordering flag is given) which |
369 | * indicates that the character `%|:|%', rather than `%|?|%', |
370 | * should be returned if a missing argument error is detected. |
371 | * |
372 | * Each option in the string can be followed by a `%|+|%' sign, |
373 | * indicating that it can be negated, a `%|:|%' sign indicating |
374 | * that it requires an argument, or a `%|::|%' string, |
375 | * indicating an optional argument. Both `%|+|%' and `%|:|%' or |
376 | * `%|::|%' may be given, although the `%|+|%' must come first. |
377 | * |
378 | * If an option is found, the option character is returned to |
379 | * the caller. A pointer to an argument is stored in |
380 | * @data->arg@, or @NULL@ is stored if there was no argument. |
381 | * If a negated option was found, the option character is |
379c3233 |
382 | * returned ORred with @OPTF_NEGATED@ (bit 8 set). |
b91e2391 |
383 | * |
384 | * Long options are described in a table. Each entry in the |
385 | * table is of type @struct option@, and the table is terminated |
386 | * by an entry whose @name@ field is null. Each option has |
387 | * a flags word which, due to historical reasons, is called |
388 | * @has_arg@. This describes various properties of the option, |
389 | * such as what sort of argument it takes, and whether it can |
390 | * be negated. |
391 | * |
392 | * When mdwopt finds a long option, it looks the name up in the |
393 | * table. The index of the matching entry is stored in the |
394 | * @longind@ variable, passed to mdwopt (unless @longind@ is 0): |
395 | * a value of %$-1$% indicates that no long option was |
396 | * found. The behaviour is then dependent on the values in the |
397 | * table entry. If @flag@ is nonzero, it points to an integer |
398 | * to be modified by mdwopt. Usually the value in the @val@ |
399 | * field is simply stored in the @flag@ variable. If the flag |
379c3233 |
400 | * @OPTF_SWITCH@ is set, however, the value is combined with |
b91e2391 |
401 | * the existing value of the flags using a bitwise OR. If |
379c3233 |
402 | * @OPTF_NEGATE@ is set, then the flag bit will be cleared if a |
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403 | * matching negated long option is found. The value 0 is |
404 | * returned. |
405 | * |
406 | * If @flag@ is zero, the value in @val@ is returned by mdwopt, |
407 | * possibly with bit 8 set if the option was negated. |
408 | * |
409 | * Arguments for long options are stored in @data->arg@, as |
410 | * before. |
411 | * |
412 | * Numeric options, if enabled, cause the value `%|#|%' to be |
413 | * returned, and the numeric value to be stored in @data->opt@. |
414 | * |
379c3233 |
415 | * If the flag @OPTF_ENVVAR@ is set on entry, options will be |
b91e2391 |
416 | * extracted from an environment variable whose name is built by |
664ee843 |
417 | * capitalizing all the letters of the program's name. (This |
b91e2391 |
418 | * allows a user to have different default settings for a |
664ee843 |
419 | * program, by calling it through different symbolic links.) |
420 | */ |
b91e2391 |
421 | |
422 | int mdwopt(int argc, char *const *argv, |
423 | const char *shortopt, |
424 | const struct option *longopts, int *longind, |
425 | mdwopt_data *data, int flags) |
426 | { |
427 | /* --- Local variables --- */ |
428 | |
4ab923c4 |
429 | char *p, *q, *r; |
430 | char *prefix; |
431 | int i; |
432 | char noarg = '?'; |
b91e2391 |
433 | |
434 | /* --- Sort out our data --- */ |
435 | |
4ab923c4 |
436 | if (!data) |
437 | data = &mdwopt_global; |
b91e2391 |
438 | |
439 | /* --- See if this is the first time --- */ |
440 | |
379c3233 |
441 | if (data->ind == 0 || (data->ind == 1 && ~flags & OPTF_NOPROGNAME)) { |
b91e2391 |
442 | |
443 | /* --- Sort out default returning order --- */ |
444 | |
4ab923c4 |
445 | if (getenv("_POSIX_OPTION_ORDER") || |
446 | getenv("POSIXLY_CORRECT")) |
447 | data->order = ORD_POSIX; |
b91e2391 |
448 | else |
4ab923c4 |
449 | data->order = ORD_PERMUTE; |
b91e2391 |
450 | |
451 | /* --- Now see what the caller actually wants --- */ |
452 | |
4ab923c4 |
453 | switch (shortopt[0]) { |
454 | case '-': |
379c3233 |
455 | data->order = ORD_RETURN; |
b91e2391 |
456 | break; |
4ab923c4 |
457 | case '+': |
379c3233 |
458 | data->order = ORD_POSIX; |
b91e2391 |
459 | break; |
4ab923c4 |
460 | case '!': |
379c3233 |
461 | data->order = ORD_PERMUTE; |
b91e2391 |
462 | break; |
463 | } |
464 | |
465 | /* --- Now decide on the program's name --- */ |
466 | |
379c3233 |
467 | if (~flags & OPTF_NOPROGNAME) { |
b91e2391 |
468 | p = q = (char *)argv[0]; |
469 | while (*p) { |
470 | if (*p++ == PATHSEP) |
471 | q = p; |
472 | } |
473 | data->prog = q; |
474 | |
475 | data->ind = data->next = 1; |
476 | data->list = 0; |
477 | |
478 | /* --- See about environment variables --- * |
479 | * |
480 | * Be careful. The program may be setuid, and an attacker might have |
481 | * given us a long name in @argv[0]@. If the name is very long, don't |
482 | * support this option. |
483 | */ |
484 | |
379c3233 |
485 | if (flags & OPTF_ENVVAR && strlen(data->prog) < 48) { |
b91e2391 |
486 | |
487 | char buf[64]; |
488 | |
489 | /* --- For RISC OS, support a different format --- * |
490 | * |
491 | * Acorn's RISC OS tends to put settings in variables named |
492 | * `App$Options' rather than `APP'. Under RISC OS, I'll support |
493 | * both methods, just to avoid confuddlement. |
494 | */ |
495 | |
496 | #ifdef __riscos |
497 | sprintf(buf, "%s$Options", data->prog); |
498 | p = getenv(buf); |
499 | if (!p) { |
500 | #endif |
501 | |
4ab923c4 |
502 | p = buf; |
503 | q = data->prog; |
504 | while (*q) |
505 | *p++ = toupper(*q++); |
506 | *p++ = 0; |
507 | p = getenv(buf); |
b91e2391 |
508 | |
509 | #ifdef __riscos |
510 | } |
511 | #endif |
512 | |
513 | /* --- Copy the options string into a buffer --- */ |
514 | |
4ab923c4 |
515 | if (p) { |
516 | q = malloc(strlen(p) + 1); |
517 | if (!q) { |
518 | fprintf(stderr, |
b91e2391 |
519 | "%s: Not enough memory to read settings in " |
520 | "environment variable\n", |
521 | data->prog); |
4ab923c4 |
522 | } else { |
523 | strcpy(q, p); |
524 | data->ind = -1; |
525 | data->env = data->estart = q; |
b91e2391 |
526 | } |
527 | } |
528 | |
529 | } |
530 | } |
531 | else |
532 | data->ind = data->next = 0; |
533 | } |
534 | |
535 | /* --- Do some initial bodgery --- * |
536 | * |
537 | * The @shortopt@ string can have some interesting characters at the |
538 | * beginning. We'll skip past them. |
539 | */ |
540 | |
541 | switch (shortopt[0]) { |
542 | case '+': |
543 | case '-': |
544 | case '!': |
545 | shortopt++; |
546 | break; |
547 | } |
548 | |
549 | if (shortopt[0] == ':') { |
550 | noarg = shortopt[0]; |
551 | shortopt++; |
552 | } |
553 | |
4ab923c4 |
554 | if (longind) |
555 | *longind = -1; |
556 | data->opt = -1; |
557 | data->arg = 0; |
b91e2391 |
558 | |
559 | /* --- Now go off and search for an option --- */ |
560 | |
561 | if (!data->list || !*data->list) { |
562 | data->order &= 3; /* Clear negation flag */ |
563 | |
564 | /* --- Now we need to find the next option --- * |
565 | * |
566 | * Exactly how we do this depends on the settings of the order variable. |
567 | * We identify options as being things starting with `%|-|%', and which |
568 | * aren't equal to `%|-|%' or `%|--|%'. We'll look for options until: |
569 | * |
379c3233 |
570 | * * We find something which isn't an option AND @order == ORD_POSIX@ |
b91e2391 |
571 | * * We find a `%|--|%' |
572 | * * We reach the end of the list |
573 | * |
574 | * There are some added little wrinkles, which we'll meet as we go. |
575 | */ |
576 | |
4ab923c4 |
577 | for (;;) { |
d0da523a |
578 | p = nextword(argc, argv, data); |
4ab923c4 |
579 | if (!p) |
580 | return (EOF); |
b91e2391 |
581 | |
582 | /* --- See if we've found an option --- */ |
583 | |
379c3233 |
584 | if ((p[0] == '-' || (p[0] == '+' && flags & OPTF_NEGATION)) && |
b91e2391 |
585 | p[1] != 0) { |
4ab923c4 |
586 | if (strcmp(p, "--") == 0) { |
587 | permute(argv, data); |
588 | return (EOF); |
b91e2391 |
589 | } |
4ab923c4 |
590 | break; |
b91e2391 |
591 | } |
592 | |
593 | /* --- Figure out how to proceed --- */ |
594 | |
595 | switch (data->order & 3) { |
4ab923c4 |
596 | case ORD_POSIX: |
597 | return (EOF); |
b91e2391 |
598 | break; |
4ab923c4 |
599 | case ORD_PERMUTE: |
b91e2391 |
600 | break; |
4ab923c4 |
601 | case ORD_RETURN: |
602 | permute(argv, data); |
603 | data->arg = p; |
604 | return (0); |
b91e2391 |
605 | } |
606 | } |
607 | |
608 | /* --- We found an option --- */ |
609 | |
4ab923c4 |
610 | permute(argv, data); |
b91e2391 |
611 | |
612 | /* --- Check for a numeric option --- * |
613 | * |
614 | * We only check the first character (or the second if the first is a |
615 | * sign). This ought to be enough. |
616 | */ |
617 | |
379c3233 |
618 | if (flags & OPTF_NUMBERS && (p[0] == '-' || flags & OPTF_NEGNUMBER)) { |
b91e2391 |
619 | if (((p[1] == '+' || p[1] == '-') && isdigit((unsigned char)p[2])) || |
620 | isdigit((unsigned char)p[1])) { |
621 | data->opt = strtol(p + 1, &data->arg, 10); |
622 | while (isspace((unsigned char)data->arg[0])) |
623 | data->arg++; |
624 | if (!data->arg[0]) |
625 | data->arg = 0; |
379c3233 |
626 | return (p[0] == '-' ? '#' : '#' | OPTF_NEGATED); |
b91e2391 |
627 | } |
628 | } |
629 | |
630 | /* --- Check for a long option --- */ |
631 | |
632 | if (p[0] == '+') |
379c3233 |
633 | data->order |= ORD_NEGATE; |
b91e2391 |
634 | |
635 | if (((p[0] == '-' && p[1] == '-') || |
379c3233 |
636 | (flags & OPTF_NOSHORTS && !findOpt(p[1], shortopt, data))) && |
4ab923c4 |
637 | (~flags & OPTF_NOLONGS)) |
b91e2391 |
638 | { |
4ab923c4 |
639 | int match = -1; |
b91e2391 |
640 | |
4ab923c4 |
641 | if (p[0] == '+') { |
642 | data->order |= ORD_NEGATE; |
643 | p++; |
644 | prefix = "+"; |
645 | } else if (p[1] == '-') { |
379c3233 |
646 | if ((flags & OPTF_NEGATION) && strncmp(p + 2, "no-", 3) == 0) { |
4ab923c4 |
647 | p += 5; |
648 | prefix = "--no-"; |
649 | data->order |= ORD_NEGATE; |
b91e2391 |
650 | } else { |
4ab923c4 |
651 | p += 2; |
652 | prefix = "--"; |
b91e2391 |
653 | } |
654 | } else { |
379c3233 |
655 | if ((flags & OPTF_NEGATION) && strncmp(p + 1, "no-", 3) == 0) { |
4ab923c4 |
656 | p += 4; |
657 | prefix = "-no-"; |
658 | data->order |= ORD_NEGATE; |
b91e2391 |
659 | } else { |
4ab923c4 |
660 | p++; |
661 | prefix = "-"; |
b91e2391 |
662 | } |
663 | } |
664 | |
4ab923c4 |
665 | for (i = 0; longopts[i].name; i++) { |
379c3233 |
666 | if ((data->order & ORD_NEGATE) && |
667 | (~longopts[i].has_arg & OPTF_NEGATE)) |
4ab923c4 |
668 | continue; |
669 | |
670 | r = (char *) longopts[i].name; |
671 | q = p; |
672 | for (;;) { |
673 | if (*q == 0 || *q == '=') { |
674 | if (*r == 0) { |
675 | match = i; |
676 | goto botched; |
b91e2391 |
677 | } |
4ab923c4 |
678 | if (match == -1) { |
679 | match = i; |
680 | break; |
b91e2391 |
681 | } else { |
4ab923c4 |
682 | match = -1; |
683 | goto botched; |
b91e2391 |
684 | } |
685 | } |
4ab923c4 |
686 | else if (*q != *r) |
687 | break; |
688 | q++, r++; |
b91e2391 |
689 | } |
690 | } |
691 | |
692 | botched: |
4ab923c4 |
693 | if (match == -1) { |
b91e2391 |
694 | if (data->err) { |
5b59e227 |
695 | fprintf(stderr, "%s: unrecognized option `%s%s'\n", |
b91e2391 |
696 | data->prog, |
697 | prefix, p); |
698 | } |
699 | return ('?'); |
700 | } |
701 | |
4ab923c4 |
702 | if (longind) |
703 | *longind = match; |
b91e2391 |
704 | |
705 | /* --- Handle argument behaviour --- */ |
706 | |
4ab923c4 |
707 | while (*p != 0 && *p != '=') |
b91e2391 |
708 | p++; |
4ab923c4 |
709 | p = (*p ? p + 1 : 0); |
710 | q = (char *) longopts[match].name; |
b91e2391 |
711 | |
4ab923c4 |
712 | switch (longopts[match].has_arg & OPTF_ARG) { |
713 | case OPTF_NOARG: |
b91e2391 |
714 | if (p) { |
715 | if (data->err) { |
716 | fprintf(stderr, |
717 | "%s: option `%s%s' does not accept arguments\n", |
718 | data->prog, |
719 | prefix, q); |
720 | } |
721 | return ('?'); |
722 | } |
723 | break; |
724 | |
4ab923c4 |
725 | case OPTF_ARGREQ: |
726 | if (!p) { |
d0da523a |
727 | p = nextword(argc, argv, data); |
b91e2391 |
728 | |
4ab923c4 |
729 | if (!p) { |
b91e2391 |
730 | if (data->err) { |
731 | fprintf(stderr, "%s: option `%s%s' requires an argument\n", |
732 | data->prog, |
733 | prefix, q); |
734 | } |
735 | return (noarg); |
736 | } |
737 | |
379c3233 |
738 | permute(argv, data); |
b91e2391 |
739 | } |
740 | break; |
741 | |
4ab923c4 |
742 | case OPTF_ARGOPT: |
b91e2391 |
743 | /* Who cares? */ |
744 | break; |
745 | } |
746 | data->arg = p; |
747 | |
748 | /* --- Do correct things now we have a match --- */ |
749 | |
4ab923c4 |
750 | if (longopts[match].flag) { |
379c3233 |
751 | if (longopts[match].has_arg & OPTF_SWITCH) { |
752 | if (data->order & ORD_NEGATE) |
b91e2391 |
753 | *longopts[match].flag &= ~longopts[match].val; |
754 | else |
755 | *longopts[match].flag |= longopts[match].val; |
756 | } else { |
379c3233 |
757 | if (data->order & ORD_NEGATE) |
b91e2391 |
758 | *longopts[match].flag = 0; |
759 | else |
760 | *longopts[match].flag = longopts[match].val; |
761 | } |
4ab923c4 |
762 | return (0); |
b91e2391 |
763 | } else { |
379c3233 |
764 | if (data->order & ORD_NEGATE) |
765 | return (longopts[match].val | OPTF_NEGATED); |
b91e2391 |
766 | else |
767 | return (longopts[match].val); |
768 | } |
769 | } |
770 | |
771 | /* --- Do short options things --- */ |
772 | |
773 | else { |
4ab923c4 |
774 | if (p[0] == '+') |
379c3233 |
775 | data->order |= ORD_NEGATE; |
4ab923c4 |
776 | data->list = p + 1; |
b91e2391 |
777 | } |
778 | } |
779 | |
780 | /* --- Now process the short options --- */ |
781 | |
4ab923c4 |
782 | i = *data->list++; |
783 | data->opt = i; |
b91e2391 |
784 | |
379c3233 |
785 | p = (char *) findOpt(i, shortopt, data); |
4ab923c4 |
786 | if (!p) { |
b91e2391 |
787 | if (data->err) { |
788 | fprintf(stderr, "%s: unknown option `%c%c'\n", |
789 | data->prog, |
379c3233 |
790 | data->order & ORD_NEGATE ? '+' : '-', |
b91e2391 |
791 | i); |
792 | } |
793 | return ('?'); |
794 | } |
795 | |
4ab923c4 |
796 | data->opt = i; |
b91e2391 |
797 | |
798 | /* --- Sort out an argument, if we expect one --- */ |
799 | |
4ab923c4 |
800 | if (p[0] == ':') { |
801 | q = (data->list[0] ? data->list : 0); |
802 | data->list = 0; |
803 | if (p[1] != ':' && !q) { |
b91e2391 |
804 | |
805 | /* --- Same code as before --- */ |
806 | |
d0da523a |
807 | q = nextword(argc, argv, data); |
4ab923c4 |
808 | if (!q) { |
b91e2391 |
809 | if (data->err) { |
810 | fprintf(stderr, "%s: option `%c%c' requires an argument\n", |
811 | data->prog, |
379c3233 |
812 | data->order & ORD_NEGATE ? '+' : '-', |
b91e2391 |
813 | i); |
814 | } |
815 | return (noarg); |
816 | } |
379c3233 |
817 | permute(argv, data); |
b91e2391 |
818 | } |
819 | |
820 | data->arg = q; |
821 | } |
379c3233 |
822 | return ((data->order & ORD_NEGATE) ? i | OPTF_NEGATED : i); |
b91e2391 |
823 | } |
824 | |
825 | /*----- That's all, folks -------------------------------------------------*/ |