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07800601 IM |
1 | #include "util.h" |
2 | #include "parse-options.h" | |
3 | #include "cache.h" | |
4 | ||
5 | #define OPT_SHORT 1 | |
6 | #define OPT_UNSET 2 | |
7 | ||
8 | static int opterror(const struct option *opt, const char *reason, int flags) | |
9 | { | |
10 | if (flags & OPT_SHORT) | |
11 | return error("switch `%c' %s", opt->short_name, reason); | |
12 | if (flags & OPT_UNSET) | |
13 | return error("option `no-%s' %s", opt->long_name, reason); | |
14 | return error("option `%s' %s", opt->long_name, reason); | |
15 | } | |
16 | ||
17 | static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt, | |
18 | int flags, const char **arg) | |
19 | { | |
20 | if (p->opt) { | |
21 | *arg = p->opt; | |
22 | p->opt = NULL; | |
5a4b1817 FW |
23 | } else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 || |
24 | **(p->argv + 1) == '-')) { | |
07800601 IM |
25 | *arg = (const char *)opt->defval; |
26 | } else if (p->argc > 1) { | |
27 | p->argc--; | |
28 | *arg = *++p->argv; | |
29 | } else | |
30 | return opterror(opt, "requires a value", flags); | |
31 | return 0; | |
32 | } | |
33 | ||
34 | static int get_value(struct parse_opt_ctx_t *p, | |
35 | const struct option *opt, int flags) | |
36 | { | |
233f0b95 | 37 | const char *s, *arg = NULL; |
07800601 IM |
38 | const int unset = flags & OPT_UNSET; |
39 | ||
40 | if (unset && p->opt) | |
41 | return opterror(opt, "takes no value", flags); | |
42 | if (unset && (opt->flags & PARSE_OPT_NONEG)) | |
43 | return opterror(opt, "isn't available", flags); | |
44 | ||
45 | if (!(flags & OPT_SHORT) && p->opt) { | |
46 | switch (opt->type) { | |
47 | case OPTION_CALLBACK: | |
48 | if (!(opt->flags & PARSE_OPT_NOARG)) | |
49 | break; | |
50 | /* FALLTHROUGH */ | |
51 | case OPTION_BOOLEAN: | |
52 | case OPTION_BIT: | |
53 | case OPTION_SET_INT: | |
54 | case OPTION_SET_PTR: | |
55 | return opterror(opt, "takes no value", flags); | |
56 | default: | |
57 | break; | |
58 | } | |
59 | } | |
60 | ||
61 | switch (opt->type) { | |
62 | case OPTION_BIT: | |
63 | if (unset) | |
64 | *(int *)opt->value &= ~opt->defval; | |
65 | else | |
66 | *(int *)opt->value |= opt->defval; | |
67 | return 0; | |
68 | ||
69 | case OPTION_BOOLEAN: | |
70 | *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1; | |
71 | return 0; | |
72 | ||
73 | case OPTION_SET_INT: | |
74 | *(int *)opt->value = unset ? 0 : opt->defval; | |
75 | return 0; | |
76 | ||
77 | case OPTION_SET_PTR: | |
78 | *(void **)opt->value = unset ? NULL : (void *)opt->defval; | |
79 | return 0; | |
80 | ||
81 | case OPTION_STRING: | |
82 | if (unset) | |
83 | *(const char **)opt->value = NULL; | |
84 | else if (opt->flags & PARSE_OPT_OPTARG && !p->opt) | |
85 | *(const char **)opt->value = (const char *)opt->defval; | |
86 | else | |
87 | return get_arg(p, opt, flags, (const char **)opt->value); | |
88 | return 0; | |
89 | ||
90 | case OPTION_CALLBACK: | |
91 | if (unset) | |
92 | return (*opt->callback)(opt, NULL, 1) ? (-1) : 0; | |
93 | if (opt->flags & PARSE_OPT_NOARG) | |
94 | return (*opt->callback)(opt, NULL, 0) ? (-1) : 0; | |
95 | if (opt->flags & PARSE_OPT_OPTARG && !p->opt) | |
96 | return (*opt->callback)(opt, NULL, 0) ? (-1) : 0; | |
97 | if (get_arg(p, opt, flags, &arg)) | |
98 | return -1; | |
99 | return (*opt->callback)(opt, arg, 0) ? (-1) : 0; | |
100 | ||
101 | case OPTION_INTEGER: | |
102 | if (unset) { | |
103 | *(int *)opt->value = 0; | |
104 | return 0; | |
105 | } | |
106 | if (opt->flags & PARSE_OPT_OPTARG && !p->opt) { | |
107 | *(int *)opt->value = opt->defval; | |
108 | return 0; | |
109 | } | |
110 | if (get_arg(p, opt, flags, &arg)) | |
111 | return -1; | |
112 | *(int *)opt->value = strtol(arg, (char **)&s, 10); | |
113 | if (*s) | |
114 | return opterror(opt, "expects a numerical value", flags); | |
e61078a0 PZ |
115 | return 0; |
116 | ||
117 | case OPTION_LONG: | |
118 | if (unset) { | |
119 | *(long *)opt->value = 0; | |
120 | return 0; | |
121 | } | |
122 | if (opt->flags & PARSE_OPT_OPTARG && !p->opt) { | |
123 | *(long *)opt->value = opt->defval; | |
124 | return 0; | |
125 | } | |
126 | if (get_arg(p, opt, flags, &arg)) | |
127 | return -1; | |
128 | *(long *)opt->value = strtol(arg, (char **)&s, 10); | |
129 | if (*s) | |
130 | return opterror(opt, "expects a numerical value", flags); | |
07800601 IM |
131 | return 0; |
132 | ||
133 | default: | |
134 | die("should not happen, someone must be hit on the forehead"); | |
135 | } | |
136 | } | |
137 | ||
138 | static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options) | |
139 | { | |
140 | for (; options->type != OPTION_END; options++) { | |
141 | if (options->short_name == *p->opt) { | |
142 | p->opt = p->opt[1] ? p->opt + 1 : NULL; | |
143 | return get_value(p, options, OPT_SHORT); | |
144 | } | |
145 | } | |
146 | return -2; | |
147 | } | |
148 | ||
149 | static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg, | |
150 | const struct option *options) | |
151 | { | |
152 | const char *arg_end = strchr(arg, '='); | |
153 | const struct option *abbrev_option = NULL, *ambiguous_option = NULL; | |
154 | int abbrev_flags = 0, ambiguous_flags = 0; | |
155 | ||
156 | if (!arg_end) | |
157 | arg_end = arg + strlen(arg); | |
158 | ||
159 | for (; options->type != OPTION_END; options++) { | |
160 | const char *rest; | |
161 | int flags = 0; | |
162 | ||
163 | if (!options->long_name) | |
164 | continue; | |
165 | ||
166 | rest = skip_prefix(arg, options->long_name); | |
167 | if (options->type == OPTION_ARGUMENT) { | |
168 | if (!rest) | |
169 | continue; | |
170 | if (*rest == '=') | |
171 | return opterror(options, "takes no value", flags); | |
172 | if (*rest) | |
173 | continue; | |
174 | p->out[p->cpidx++] = arg - 2; | |
175 | return 0; | |
176 | } | |
177 | if (!rest) { | |
178 | /* abbreviated? */ | |
179 | if (!strncmp(options->long_name, arg, arg_end - arg)) { | |
180 | is_abbreviated: | |
181 | if (abbrev_option) { | |
182 | /* | |
183 | * If this is abbreviated, it is | |
184 | * ambiguous. So when there is no | |
185 | * exact match later, we need to | |
186 | * error out. | |
187 | */ | |
188 | ambiguous_option = abbrev_option; | |
189 | ambiguous_flags = abbrev_flags; | |
190 | } | |
191 | if (!(flags & OPT_UNSET) && *arg_end) | |
192 | p->opt = arg_end + 1; | |
193 | abbrev_option = options; | |
194 | abbrev_flags = flags; | |
195 | continue; | |
196 | } | |
197 | /* negated and abbreviated very much? */ | |
198 | if (!prefixcmp("no-", arg)) { | |
199 | flags |= OPT_UNSET; | |
200 | goto is_abbreviated; | |
201 | } | |
202 | /* negated? */ | |
203 | if (strncmp(arg, "no-", 3)) | |
204 | continue; | |
205 | flags |= OPT_UNSET; | |
206 | rest = skip_prefix(arg + 3, options->long_name); | |
207 | /* abbreviated and negated? */ | |
208 | if (!rest && !prefixcmp(options->long_name, arg + 3)) | |
209 | goto is_abbreviated; | |
210 | if (!rest) | |
211 | continue; | |
212 | } | |
213 | if (*rest) { | |
214 | if (*rest != '=') | |
215 | continue; | |
216 | p->opt = rest + 1; | |
217 | } | |
218 | return get_value(p, options, flags); | |
219 | } | |
220 | ||
221 | if (ambiguous_option) | |
222 | return error("Ambiguous option: %s " | |
223 | "(could be --%s%s or --%s%s)", | |
224 | arg, | |
225 | (ambiguous_flags & OPT_UNSET) ? "no-" : "", | |
226 | ambiguous_option->long_name, | |
227 | (abbrev_flags & OPT_UNSET) ? "no-" : "", | |
228 | abbrev_option->long_name); | |
229 | if (abbrev_option) | |
230 | return get_value(p, abbrev_option, abbrev_flags); | |
231 | return -2; | |
232 | } | |
233 | ||
234 | static void check_typos(const char *arg, const struct option *options) | |
235 | { | |
236 | if (strlen(arg) < 3) | |
237 | return; | |
238 | ||
239 | if (!prefixcmp(arg, "no-")) { | |
240 | error ("did you mean `--%s` (with two dashes ?)", arg); | |
241 | exit(129); | |
242 | } | |
243 | ||
244 | for (; options->type != OPTION_END; options++) { | |
245 | if (!options->long_name) | |
246 | continue; | |
247 | if (!prefixcmp(options->long_name, arg)) { | |
248 | error ("did you mean `--%s` (with two dashes ?)", arg); | |
249 | exit(129); | |
250 | } | |
251 | } | |
252 | } | |
253 | ||
254 | void parse_options_start(struct parse_opt_ctx_t *ctx, | |
255 | int argc, const char **argv, int flags) | |
256 | { | |
257 | memset(ctx, 0, sizeof(*ctx)); | |
258 | ctx->argc = argc - 1; | |
259 | ctx->argv = argv + 1; | |
260 | ctx->out = argv; | |
261 | ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0); | |
262 | ctx->flags = flags; | |
263 | if ((flags & PARSE_OPT_KEEP_UNKNOWN) && | |
264 | (flags & PARSE_OPT_STOP_AT_NON_OPTION)) | |
265 | die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together"); | |
266 | } | |
267 | ||
268 | static int usage_with_options_internal(const char * const *, | |
269 | const struct option *, int); | |
270 | ||
271 | int parse_options_step(struct parse_opt_ctx_t *ctx, | |
272 | const struct option *options, | |
273 | const char * const usagestr[]) | |
274 | { | |
275 | int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP); | |
276 | ||
277 | /* we must reset ->opt, unknown short option leave it dangling */ | |
278 | ctx->opt = NULL; | |
279 | ||
280 | for (; ctx->argc; ctx->argc--, ctx->argv++) { | |
281 | const char *arg = ctx->argv[0]; | |
282 | ||
283 | if (*arg != '-' || !arg[1]) { | |
284 | if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION) | |
285 | break; | |
286 | ctx->out[ctx->cpidx++] = ctx->argv[0]; | |
287 | continue; | |
288 | } | |
289 | ||
290 | if (arg[1] != '-') { | |
291 | ctx->opt = arg + 1; | |
292 | if (internal_help && *ctx->opt == 'h') | |
293 | return parse_options_usage(usagestr, options); | |
294 | switch (parse_short_opt(ctx, options)) { | |
295 | case -1: | |
296 | return parse_options_usage(usagestr, options); | |
297 | case -2: | |
298 | goto unknown; | |
299 | } | |
300 | if (ctx->opt) | |
301 | check_typos(arg + 1, options); | |
302 | while (ctx->opt) { | |
303 | if (internal_help && *ctx->opt == 'h') | |
304 | return parse_options_usage(usagestr, options); | |
305 | switch (parse_short_opt(ctx, options)) { | |
306 | case -1: | |
307 | return parse_options_usage(usagestr, options); | |
308 | case -2: | |
309 | /* fake a short option thing to hide the fact that we may have | |
310 | * started to parse aggregated stuff | |
311 | * | |
312 | * This is leaky, too bad. | |
313 | */ | |
314 | ctx->argv[0] = strdup(ctx->opt - 1); | |
315 | *(char *)ctx->argv[0] = '-'; | |
316 | goto unknown; | |
317 | } | |
318 | } | |
319 | continue; | |
320 | } | |
321 | ||
322 | if (!arg[2]) { /* "--" */ | |
323 | if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) { | |
324 | ctx->argc--; | |
325 | ctx->argv++; | |
326 | } | |
327 | break; | |
328 | } | |
329 | ||
330 | if (internal_help && !strcmp(arg + 2, "help-all")) | |
331 | return usage_with_options_internal(usagestr, options, 1); | |
332 | if (internal_help && !strcmp(arg + 2, "help")) | |
333 | return parse_options_usage(usagestr, options); | |
334 | switch (parse_long_opt(ctx, arg + 2, options)) { | |
335 | case -1: | |
336 | return parse_options_usage(usagestr, options); | |
337 | case -2: | |
338 | goto unknown; | |
339 | } | |
340 | continue; | |
341 | unknown: | |
342 | if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN)) | |
343 | return PARSE_OPT_UNKNOWN; | |
344 | ctx->out[ctx->cpidx++] = ctx->argv[0]; | |
345 | ctx->opt = NULL; | |
346 | } | |
347 | return PARSE_OPT_DONE; | |
348 | } | |
349 | ||
350 | int parse_options_end(struct parse_opt_ctx_t *ctx) | |
351 | { | |
352 | memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out)); | |
353 | ctx->out[ctx->cpidx + ctx->argc] = NULL; | |
354 | return ctx->cpidx + ctx->argc; | |
355 | } | |
356 | ||
357 | int parse_options(int argc, const char **argv, const struct option *options, | |
358 | const char * const usagestr[], int flags) | |
359 | { | |
360 | struct parse_opt_ctx_t ctx; | |
361 | ||
362 | parse_options_start(&ctx, argc, argv, flags); | |
363 | switch (parse_options_step(&ctx, options, usagestr)) { | |
364 | case PARSE_OPT_HELP: | |
365 | exit(129); | |
366 | case PARSE_OPT_DONE: | |
367 | break; | |
368 | default: /* PARSE_OPT_UNKNOWN */ | |
369 | if (ctx.argv[0][1] == '-') { | |
370 | error("unknown option `%s'", ctx.argv[0] + 2); | |
371 | } else { | |
372 | error("unknown switch `%c'", *ctx.opt); | |
373 | } | |
374 | usage_with_options(usagestr, options); | |
375 | } | |
376 | ||
377 | return parse_options_end(&ctx); | |
378 | } | |
379 | ||
380 | #define USAGE_OPTS_WIDTH 24 | |
381 | #define USAGE_GAP 2 | |
382 | ||
383 | int usage_with_options_internal(const char * const *usagestr, | |
384 | const struct option *opts, int full) | |
385 | { | |
386 | if (!usagestr) | |
387 | return PARSE_OPT_HELP; | |
388 | ||
502fc5c7 | 389 | fprintf(stderr, "\n usage: %s\n", *usagestr++); |
07800601 | 390 | while (*usagestr && **usagestr) |
6e6b754f | 391 | fprintf(stderr, " or: %s\n", *usagestr++); |
07800601 IM |
392 | while (*usagestr) { |
393 | fprintf(stderr, "%s%s\n", | |
394 | **usagestr ? " " : "", | |
395 | *usagestr); | |
396 | usagestr++; | |
397 | } | |
398 | ||
399 | if (opts->type != OPTION_GROUP) | |
400 | fputc('\n', stderr); | |
401 | ||
402 | for (; opts->type != OPTION_END; opts++) { | |
403 | size_t pos; | |
404 | int pad; | |
405 | ||
406 | if (opts->type == OPTION_GROUP) { | |
407 | fputc('\n', stderr); | |
408 | if (*opts->help) | |
409 | fprintf(stderr, "%s\n", opts->help); | |
410 | continue; | |
411 | } | |
412 | if (!full && (opts->flags & PARSE_OPT_HIDDEN)) | |
413 | continue; | |
414 | ||
415 | pos = fprintf(stderr, " "); | |
416 | if (opts->short_name) | |
417 | pos += fprintf(stderr, "-%c", opts->short_name); | |
418 | if (opts->long_name && opts->short_name) | |
419 | pos += fprintf(stderr, ", "); | |
420 | if (opts->long_name) | |
421 | pos += fprintf(stderr, "--%s", opts->long_name); | |
422 | ||
423 | switch (opts->type) { | |
424 | case OPTION_ARGUMENT: | |
425 | break; | |
426 | case OPTION_INTEGER: | |
427 | if (opts->flags & PARSE_OPT_OPTARG) | |
428 | if (opts->long_name) | |
429 | pos += fprintf(stderr, "[=<n>]"); | |
430 | else | |
431 | pos += fprintf(stderr, "[<n>]"); | |
432 | else | |
433 | pos += fprintf(stderr, " <n>"); | |
434 | break; | |
435 | case OPTION_CALLBACK: | |
436 | if (opts->flags & PARSE_OPT_NOARG) | |
437 | break; | |
438 | /* FALLTHROUGH */ | |
439 | case OPTION_STRING: | |
440 | if (opts->argh) { | |
441 | if (opts->flags & PARSE_OPT_OPTARG) | |
442 | if (opts->long_name) | |
443 | pos += fprintf(stderr, "[=<%s>]", opts->argh); | |
444 | else | |
445 | pos += fprintf(stderr, "[<%s>]", opts->argh); | |
446 | else | |
447 | pos += fprintf(stderr, " <%s>", opts->argh); | |
448 | } else { | |
449 | if (opts->flags & PARSE_OPT_OPTARG) | |
450 | if (opts->long_name) | |
451 | pos += fprintf(stderr, "[=...]"); | |
452 | else | |
453 | pos += fprintf(stderr, "[...]"); | |
454 | else | |
455 | pos += fprintf(stderr, " ..."); | |
456 | } | |
457 | break; | |
458 | default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */ | |
459 | break; | |
460 | } | |
461 | ||
462 | if (pos <= USAGE_OPTS_WIDTH) | |
463 | pad = USAGE_OPTS_WIDTH - pos; | |
464 | else { | |
465 | fputc('\n', stderr); | |
466 | pad = USAGE_OPTS_WIDTH; | |
467 | } | |
468 | fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help); | |
469 | } | |
470 | fputc('\n', stderr); | |
471 | ||
472 | return PARSE_OPT_HELP; | |
473 | } | |
474 | ||
475 | void usage_with_options(const char * const *usagestr, | |
476 | const struct option *opts) | |
477 | { | |
478 | usage_with_options_internal(usagestr, opts, 0); | |
479 | exit(129); | |
480 | } | |
481 | ||
482 | int parse_options_usage(const char * const *usagestr, | |
483 | const struct option *opts) | |
484 | { | |
485 | return usage_with_options_internal(usagestr, opts, 0); | |
486 | } | |
487 | ||
488 | ||
f37a291c | 489 | int parse_opt_verbosity_cb(const struct option *opt, const char *arg __used, |
07800601 IM |
490 | int unset) |
491 | { | |
492 | int *target = opt->value; | |
493 | ||
494 | if (unset) | |
495 | /* --no-quiet, --no-verbose */ | |
496 | *target = 0; | |
497 | else if (opt->short_name == 'v') { | |
498 | if (*target >= 0) | |
499 | (*target)++; | |
500 | else | |
501 | *target = 1; | |
502 | } else { | |
503 | if (*target <= 0) | |
504 | (*target)--; | |
505 | else | |
506 | *target = -1; | |
507 | } | |
508 | return 0; | |
509 | } |