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