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Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[karo-tx-linux.git] / tools / perf / util / parse-options.c
1 #include "util.h"
2 #include "parse-options.h"
3 #include "cache.h"
4 #include "header.h"
5 #include <linux/string.h>
6
7 #define OPT_SHORT 1
8 #define OPT_UNSET 2
9
10 static struct strbuf error_buf = STRBUF_INIT;
11
12 static int opterror(const struct option *opt, const char *reason, int flags)
13 {
14         if (flags & OPT_SHORT)
15                 return error("switch `%c' %s", opt->short_name, reason);
16         if (flags & OPT_UNSET)
17                 return error("option `no-%s' %s", opt->long_name, reason);
18         return error("option `%s' %s", opt->long_name, reason);
19 }
20
21 static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
22                    int flags, const char **arg)
23 {
24         if (p->opt) {
25                 *arg = p->opt;
26                 p->opt = NULL;
27         } else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||
28                     **(p->argv + 1) == '-')) {
29                 *arg = (const char *)opt->defval;
30         } else if (p->argc > 1) {
31                 p->argc--;
32                 *arg = *++p->argv;
33         } else
34                 return opterror(opt, "requires a value", flags);
35         return 0;
36 }
37
38 static int get_value(struct parse_opt_ctx_t *p,
39                      const struct option *opt, int flags)
40 {
41         const char *s, *arg = NULL;
42         const int unset = flags & OPT_UNSET;
43         int err;
44
45         if (unset && p->opt)
46                 return opterror(opt, "takes no value", flags);
47         if (unset && (opt->flags & PARSE_OPT_NONEG))
48                 return opterror(opt, "isn't available", flags);
49         if (opt->flags & PARSE_OPT_DISABLED)
50                 return opterror(opt, "is not usable", flags);
51
52         if (opt->flags & PARSE_OPT_EXCLUSIVE) {
53                 if (p->excl_opt && p->excl_opt != opt) {
54                         char msg[128];
55
56                         if (((flags & OPT_SHORT) && p->excl_opt->short_name) ||
57                             p->excl_opt->long_name == NULL) {
58                                 scnprintf(msg, sizeof(msg), "cannot be used with switch `%c'",
59                                           p->excl_opt->short_name);
60                         } else {
61                                 scnprintf(msg, sizeof(msg), "cannot be used with %s",
62                                           p->excl_opt->long_name);
63                         }
64                         opterror(opt, msg, flags);
65                         return -3;
66                 }
67                 p->excl_opt = opt;
68         }
69         if (!(flags & OPT_SHORT) && p->opt) {
70                 switch (opt->type) {
71                 case OPTION_CALLBACK:
72                         if (!(opt->flags & PARSE_OPT_NOARG))
73                                 break;
74                         /* FALLTHROUGH */
75                 case OPTION_BOOLEAN:
76                 case OPTION_INCR:
77                 case OPTION_BIT:
78                 case OPTION_SET_UINT:
79                 case OPTION_SET_PTR:
80                         return opterror(opt, "takes no value", flags);
81                 case OPTION_END:
82                 case OPTION_ARGUMENT:
83                 case OPTION_GROUP:
84                 case OPTION_STRING:
85                 case OPTION_INTEGER:
86                 case OPTION_UINTEGER:
87                 case OPTION_LONG:
88                 case OPTION_U64:
89                 default:
90                         break;
91                 }
92         }
93
94         switch (opt->type) {
95         case OPTION_BIT:
96                 if (unset)
97                         *(int *)opt->value &= ~opt->defval;
98                 else
99                         *(int *)opt->value |= opt->defval;
100                 return 0;
101
102         case OPTION_BOOLEAN:
103                 *(bool *)opt->value = unset ? false : true;
104                 if (opt->set)
105                         *(bool *)opt->set = true;
106                 return 0;
107
108         case OPTION_INCR:
109                 *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
110                 return 0;
111
112         case OPTION_SET_UINT:
113                 *(unsigned int *)opt->value = unset ? 0 : opt->defval;
114                 return 0;
115
116         case OPTION_SET_PTR:
117                 *(void **)opt->value = unset ? NULL : (void *)opt->defval;
118                 return 0;
119
120         case OPTION_STRING:
121                 err = 0;
122                 if (unset)
123                         *(const char **)opt->value = NULL;
124                 else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
125                         *(const char **)opt->value = (const char *)opt->defval;
126                 else
127                         err = get_arg(p, opt, flags, (const char **)opt->value);
128
129                 /* PARSE_OPT_NOEMPTY: Allow NULL but disallow empty string. */
130                 if (opt->flags & PARSE_OPT_NOEMPTY) {
131                         const char *val = *(const char **)opt->value;
132
133                         if (!val)
134                                 return err;
135
136                         /* Similar to unset if we are given an empty string. */
137                         if (val[0] == '\0') {
138                                 *(const char **)opt->value = NULL;
139                                 return 0;
140                         }
141                 }
142
143                 return err;
144
145         case OPTION_CALLBACK:
146                 if (unset)
147                         return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
148                 if (opt->flags & PARSE_OPT_NOARG)
149                         return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
150                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
151                         return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
152                 if (get_arg(p, opt, flags, &arg))
153                         return -1;
154                 return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
155
156         case OPTION_INTEGER:
157                 if (unset) {
158                         *(int *)opt->value = 0;
159                         return 0;
160                 }
161                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
162                         *(int *)opt->value = opt->defval;
163                         return 0;
164                 }
165                 if (get_arg(p, opt, flags, &arg))
166                         return -1;
167                 *(int *)opt->value = strtol(arg, (char **)&s, 10);
168                 if (*s)
169                         return opterror(opt, "expects a numerical value", flags);
170                 return 0;
171
172         case OPTION_UINTEGER:
173                 if (unset) {
174                         *(unsigned int *)opt->value = 0;
175                         return 0;
176                 }
177                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
178                         *(unsigned int *)opt->value = opt->defval;
179                         return 0;
180                 }
181                 if (get_arg(p, opt, flags, &arg))
182                         return -1;
183                 *(unsigned int *)opt->value = strtol(arg, (char **)&s, 10);
184                 if (*s)
185                         return opterror(opt, "expects a numerical value", flags);
186                 return 0;
187
188         case OPTION_LONG:
189                 if (unset) {
190                         *(long *)opt->value = 0;
191                         return 0;
192                 }
193                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
194                         *(long *)opt->value = opt->defval;
195                         return 0;
196                 }
197                 if (get_arg(p, opt, flags, &arg))
198                         return -1;
199                 *(long *)opt->value = strtol(arg, (char **)&s, 10);
200                 if (*s)
201                         return opterror(opt, "expects a numerical value", flags);
202                 return 0;
203
204         case OPTION_U64:
205                 if (unset) {
206                         *(u64 *)opt->value = 0;
207                         return 0;
208                 }
209                 if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
210                         *(u64 *)opt->value = opt->defval;
211                         return 0;
212                 }
213                 if (get_arg(p, opt, flags, &arg))
214                         return -1;
215                 *(u64 *)opt->value = strtoull(arg, (char **)&s, 10);
216                 if (*s)
217                         return opterror(opt, "expects a numerical value", flags);
218                 return 0;
219
220         case OPTION_END:
221         case OPTION_ARGUMENT:
222         case OPTION_GROUP:
223         default:
224                 die("should not happen, someone must be hit on the forehead");
225         }
226 }
227
228 static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
229 {
230         for (; options->type != OPTION_END; options++) {
231                 if (options->short_name == *p->opt) {
232                         p->opt = p->opt[1] ? p->opt + 1 : NULL;
233                         return get_value(p, options, OPT_SHORT);
234                 }
235         }
236         return -2;
237 }
238
239 static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
240                           const struct option *options)
241 {
242         const char *arg_end = strchr(arg, '=');
243         const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
244         int abbrev_flags = 0, ambiguous_flags = 0;
245
246         if (!arg_end)
247                 arg_end = arg + strlen(arg);
248
249         for (; options->type != OPTION_END; options++) {
250                 const char *rest;
251                 int flags = 0;
252
253                 if (!options->long_name)
254                         continue;
255
256                 rest = skip_prefix(arg, options->long_name);
257                 if (options->type == OPTION_ARGUMENT) {
258                         if (!rest)
259                                 continue;
260                         if (*rest == '=')
261                                 return opterror(options, "takes no value", flags);
262                         if (*rest)
263                                 continue;
264                         p->out[p->cpidx++] = arg - 2;
265                         return 0;
266                 }
267                 if (!rest) {
268                         if (!prefixcmp(options->long_name, "no-")) {
269                                 /*
270                                  * The long name itself starts with "no-", so
271                                  * accept the option without "no-" so that users
272                                  * do not have to enter "no-no-" to get the
273                                  * negation.
274                                  */
275                                 rest = skip_prefix(arg, options->long_name + 3);
276                                 if (rest) {
277                                         flags |= OPT_UNSET;
278                                         goto match;
279                                 }
280                                 /* Abbreviated case */
281                                 if (!prefixcmp(options->long_name + 3, arg)) {
282                                         flags |= OPT_UNSET;
283                                         goto is_abbreviated;
284                                 }
285                         }
286                         /* abbreviated? */
287                         if (!strncmp(options->long_name, arg, arg_end - arg)) {
288 is_abbreviated:
289                                 if (abbrev_option) {
290                                         /*
291                                          * If this is abbreviated, it is
292                                          * ambiguous. So when there is no
293                                          * exact match later, we need to
294                                          * error out.
295                                          */
296                                         ambiguous_option = abbrev_option;
297                                         ambiguous_flags = abbrev_flags;
298                                 }
299                                 if (!(flags & OPT_UNSET) && *arg_end)
300                                         p->opt = arg_end + 1;
301                                 abbrev_option = options;
302                                 abbrev_flags = flags;
303                                 continue;
304                         }
305                         /* negated and abbreviated very much? */
306                         if (!prefixcmp("no-", arg)) {
307                                 flags |= OPT_UNSET;
308                                 goto is_abbreviated;
309                         }
310                         /* negated? */
311                         if (strncmp(arg, "no-", 3))
312                                 continue;
313                         flags |= OPT_UNSET;
314                         rest = skip_prefix(arg + 3, options->long_name);
315                         /* abbreviated and negated? */
316                         if (!rest && !prefixcmp(options->long_name, arg + 3))
317                                 goto is_abbreviated;
318                         if (!rest)
319                                 continue;
320                 }
321 match:
322                 if (*rest) {
323                         if (*rest != '=')
324                                 continue;
325                         p->opt = rest + 1;
326                 }
327                 return get_value(p, options, flags);
328         }
329
330         if (ambiguous_option)
331                 return error("Ambiguous option: %s "
332                         "(could be --%s%s or --%s%s)",
333                         arg,
334                         (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
335                         ambiguous_option->long_name,
336                         (abbrev_flags & OPT_UNSET) ?  "no-" : "",
337                         abbrev_option->long_name);
338         if (abbrev_option)
339                 return get_value(p, abbrev_option, abbrev_flags);
340         return -2;
341 }
342
343 static void check_typos(const char *arg, const struct option *options)
344 {
345         if (strlen(arg) < 3)
346                 return;
347
348         if (!prefixcmp(arg, "no-")) {
349                 error ("did you mean `--%s` (with two dashes ?)", arg);
350                 exit(129);
351         }
352
353         for (; options->type != OPTION_END; options++) {
354                 if (!options->long_name)
355                         continue;
356                 if (!prefixcmp(options->long_name, arg)) {
357                         error ("did you mean `--%s` (with two dashes ?)", arg);
358                         exit(129);
359                 }
360         }
361 }
362
363 void parse_options_start(struct parse_opt_ctx_t *ctx,
364                          int argc, const char **argv, int flags)
365 {
366         memset(ctx, 0, sizeof(*ctx));
367         ctx->argc = argc - 1;
368         ctx->argv = argv + 1;
369         ctx->out  = argv;
370         ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
371         ctx->flags = flags;
372         if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
373             (flags & PARSE_OPT_STOP_AT_NON_OPTION))
374                 die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
375 }
376
377 static int usage_with_options_internal(const char * const *,
378                                        const struct option *, int,
379                                        struct parse_opt_ctx_t *);
380
381 int parse_options_step(struct parse_opt_ctx_t *ctx,
382                        const struct option *options,
383                        const char * const usagestr[])
384 {
385         int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
386         int excl_short_opt = 1;
387         const char *arg;
388
389         /* we must reset ->opt, unknown short option leave it dangling */
390         ctx->opt = NULL;
391
392         for (; ctx->argc; ctx->argc--, ctx->argv++) {
393                 arg = ctx->argv[0];
394                 if (*arg != '-' || !arg[1]) {
395                         if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
396                                 break;
397                         ctx->out[ctx->cpidx++] = ctx->argv[0];
398                         continue;
399                 }
400
401                 if (arg[1] != '-') {
402                         ctx->opt = ++arg;
403                         if (internal_help && *ctx->opt == 'h') {
404                                 return usage_with_options_internal(usagestr, options, 0, ctx);
405                         }
406                         switch (parse_short_opt(ctx, options)) {
407                         case -1:
408                                 return parse_options_usage(usagestr, options, arg, 1);
409                         case -2:
410                                 goto unknown;
411                         case -3:
412                                 goto exclusive;
413                         default:
414                                 break;
415                         }
416                         if (ctx->opt)
417                                 check_typos(arg, options);
418                         while (ctx->opt) {
419                                 if (internal_help && *ctx->opt == 'h')
420                                         return usage_with_options_internal(usagestr, options, 0, ctx);
421                                 arg = ctx->opt;
422                                 switch (parse_short_opt(ctx, options)) {
423                                 case -1:
424                                         return parse_options_usage(usagestr, options, arg, 1);
425                                 case -2:
426                                         /* fake a short option thing to hide the fact that we may have
427                                          * started to parse aggregated stuff
428                                          *
429                                          * This is leaky, too bad.
430                                          */
431                                         ctx->argv[0] = strdup(ctx->opt - 1);
432                                         *(char *)ctx->argv[0] = '-';
433                                         goto unknown;
434                                 case -3:
435                                         goto exclusive;
436                                 default:
437                                         break;
438                                 }
439                         }
440                         continue;
441                 }
442
443                 if (!arg[2]) { /* "--" */
444                         if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
445                                 ctx->argc--;
446                                 ctx->argv++;
447                         }
448                         break;
449                 }
450
451                 arg += 2;
452                 if (internal_help && !strcmp(arg, "help-all"))
453                         return usage_with_options_internal(usagestr, options, 1, ctx);
454                 if (internal_help && !strcmp(arg, "help"))
455                         return usage_with_options_internal(usagestr, options, 0, ctx);
456                 if (!strcmp(arg, "list-opts"))
457                         return PARSE_OPT_LIST_OPTS;
458                 if (!strcmp(arg, "list-cmds"))
459                         return PARSE_OPT_LIST_SUBCMDS;
460                 switch (parse_long_opt(ctx, arg, options)) {
461                 case -1:
462                         return parse_options_usage(usagestr, options, arg, 0);
463                 case -2:
464                         goto unknown;
465                 case -3:
466                         excl_short_opt = 0;
467                         goto exclusive;
468                 default:
469                         break;
470                 }
471                 continue;
472 unknown:
473                 if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
474                         return PARSE_OPT_UNKNOWN;
475                 ctx->out[ctx->cpidx++] = ctx->argv[0];
476                 ctx->opt = NULL;
477         }
478         return PARSE_OPT_DONE;
479
480 exclusive:
481         parse_options_usage(usagestr, options, arg, excl_short_opt);
482         if ((excl_short_opt && ctx->excl_opt->short_name) ||
483             ctx->excl_opt->long_name == NULL) {
484                 char opt = ctx->excl_opt->short_name;
485                 parse_options_usage(NULL, options, &opt, 1);
486         } else {
487                 parse_options_usage(NULL, options, ctx->excl_opt->long_name, 0);
488         }
489         return PARSE_OPT_HELP;
490 }
491
492 int parse_options_end(struct parse_opt_ctx_t *ctx)
493 {
494         memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
495         ctx->out[ctx->cpidx + ctx->argc] = NULL;
496         return ctx->cpidx + ctx->argc;
497 }
498
499 int parse_options_subcommand(int argc, const char **argv, const struct option *options,
500                         const char *const subcommands[], const char *usagestr[], int flags)
501 {
502         struct parse_opt_ctx_t ctx;
503
504         perf_env__set_cmdline(&perf_env, argc, argv);
505
506         /* build usage string if it's not provided */
507         if (subcommands && !usagestr[0]) {
508                 struct strbuf buf = STRBUF_INIT;
509
510                 strbuf_addf(&buf, "perf %s [<options>] {", argv[0]);
511                 for (int i = 0; subcommands[i]; i++) {
512                         if (i)
513                                 strbuf_addstr(&buf, "|");
514                         strbuf_addstr(&buf, subcommands[i]);
515                 }
516                 strbuf_addstr(&buf, "}");
517
518                 usagestr[0] = strdup(buf.buf);
519                 strbuf_release(&buf);
520         }
521
522         parse_options_start(&ctx, argc, argv, flags);
523         switch (parse_options_step(&ctx, options, usagestr)) {
524         case PARSE_OPT_HELP:
525                 exit(129);
526         case PARSE_OPT_DONE:
527                 break;
528         case PARSE_OPT_LIST_OPTS:
529                 while (options->type != OPTION_END) {
530                         if (options->long_name)
531                                 printf("--%s ", options->long_name);
532                         options++;
533                 }
534                 putchar('\n');
535                 exit(130);
536         case PARSE_OPT_LIST_SUBCMDS:
537                 if (subcommands) {
538                         for (int i = 0; subcommands[i]; i++)
539                                 printf("%s ", subcommands[i]);
540                 }
541                 putchar('\n');
542                 exit(130);
543         default: /* PARSE_OPT_UNKNOWN */
544                 if (ctx.argv[0][1] == '-') {
545                         strbuf_addf(&error_buf, "unknown option `%s'",
546                                     ctx.argv[0] + 2);
547                 } else {
548                         strbuf_addf(&error_buf, "unknown switch `%c'",
549                                     *ctx.opt);
550                 }
551                 usage_with_options(usagestr, options);
552         }
553
554         return parse_options_end(&ctx);
555 }
556
557 int parse_options(int argc, const char **argv, const struct option *options,
558                   const char * const usagestr[], int flags)
559 {
560         return parse_options_subcommand(argc, argv, options, NULL,
561                                         (const char **) usagestr, flags);
562 }
563
564 #define USAGE_OPTS_WIDTH 24
565 #define USAGE_GAP         2
566
567 static void print_option_help(const struct option *opts, int full)
568 {
569         size_t pos;
570         int pad;
571
572         if (opts->type == OPTION_GROUP) {
573                 fputc('\n', stderr);
574                 if (*opts->help)
575                         fprintf(stderr, "%s\n", opts->help);
576                 return;
577         }
578         if (!full && (opts->flags & PARSE_OPT_HIDDEN))
579                 return;
580         if (opts->flags & PARSE_OPT_DISABLED)
581                 return;
582
583         pos = fprintf(stderr, "    ");
584         if (opts->short_name)
585                 pos += fprintf(stderr, "-%c", opts->short_name);
586         else
587                 pos += fprintf(stderr, "    ");
588
589         if (opts->long_name && opts->short_name)
590                 pos += fprintf(stderr, ", ");
591         if (opts->long_name)
592                 pos += fprintf(stderr, "--%s", opts->long_name);
593
594         switch (opts->type) {
595         case OPTION_ARGUMENT:
596                 break;
597         case OPTION_LONG:
598         case OPTION_U64:
599         case OPTION_INTEGER:
600         case OPTION_UINTEGER:
601                 if (opts->flags & PARSE_OPT_OPTARG)
602                         if (opts->long_name)
603                                 pos += fprintf(stderr, "[=<n>]");
604                         else
605                                 pos += fprintf(stderr, "[<n>]");
606                 else
607                         pos += fprintf(stderr, " <n>");
608                 break;
609         case OPTION_CALLBACK:
610                 if (opts->flags & PARSE_OPT_NOARG)
611                         break;
612                 /* FALLTHROUGH */
613         case OPTION_STRING:
614                 if (opts->argh) {
615                         if (opts->flags & PARSE_OPT_OPTARG)
616                                 if (opts->long_name)
617                                         pos += fprintf(stderr, "[=<%s>]", opts->argh);
618                                 else
619                                         pos += fprintf(stderr, "[<%s>]", opts->argh);
620                         else
621                                 pos += fprintf(stderr, " <%s>", opts->argh);
622                 } else {
623                         if (opts->flags & PARSE_OPT_OPTARG)
624                                 if (opts->long_name)
625                                         pos += fprintf(stderr, "[=...]");
626                                 else
627                                         pos += fprintf(stderr, "[...]");
628                         else
629                                 pos += fprintf(stderr, " ...");
630                 }
631                 break;
632         default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */
633         case OPTION_END:
634         case OPTION_GROUP:
635         case OPTION_BIT:
636         case OPTION_BOOLEAN:
637         case OPTION_INCR:
638         case OPTION_SET_UINT:
639         case OPTION_SET_PTR:
640                 break;
641         }
642
643         if (pos <= USAGE_OPTS_WIDTH)
644                 pad = USAGE_OPTS_WIDTH - pos;
645         else {
646                 fputc('\n', stderr);
647                 pad = USAGE_OPTS_WIDTH;
648         }
649         fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
650 }
651
652 static int option__cmp(const void *va, const void *vb)
653 {
654         const struct option *a = va, *b = vb;
655         int sa = tolower(a->short_name), sb = tolower(b->short_name), ret;
656
657         if (sa == 0)
658                 sa = 'z' + 1;
659         if (sb == 0)
660                 sb = 'z' + 1;
661
662         ret = sa - sb;
663
664         if (ret == 0) {
665                 const char *la = a->long_name ?: "",
666                            *lb = b->long_name ?: "";
667                 ret = strcmp(la, lb);
668         }
669
670         return ret;
671 }
672
673 static struct option *options__order(const struct option *opts)
674 {
675         int nr_opts = 0;
676         const struct option *o = opts;
677         struct option *ordered;
678
679         for (o = opts; o->type != OPTION_END; o++)
680                 ++nr_opts;
681
682         ordered = memdup(opts, sizeof(*o) * (nr_opts + 1));
683         if (ordered == NULL)
684                 goto out;
685
686         qsort(ordered, nr_opts, sizeof(*o), option__cmp);
687 out:
688         return ordered;
689 }
690
691 static bool option__in_argv(const struct option *opt, const struct parse_opt_ctx_t *ctx)
692 {
693         int i;
694
695         for (i = 1; i < ctx->argc; ++i) {
696                 const char *arg = ctx->argv[i];
697
698                 if (arg[0] != '-') {
699                         if (arg[1] == '\0') {
700                                 if (arg[0] == opt->short_name)
701                                         return true;
702                                 continue;
703                         }
704
705                         if (opt->long_name && strcmp(opt->long_name, arg) == 0)
706                                 return true;
707
708                         if (opt->help && strcasestr(opt->help, arg) != NULL)
709                                 return true;
710
711                         continue;
712                 }
713
714                 if (arg[1] == opt->short_name ||
715                     (arg[1] == '-' && opt->long_name && strcmp(opt->long_name, arg + 2) == 0))
716                         return true;
717         }
718
719         return false;
720 }
721
722 int usage_with_options_internal(const char * const *usagestr,
723                                 const struct option *opts, int full,
724                                 struct parse_opt_ctx_t *ctx)
725 {
726         struct option *ordered;
727
728         if (!usagestr)
729                 return PARSE_OPT_HELP;
730
731         setup_pager();
732
733         if (strbuf_avail(&error_buf)) {
734                 fprintf(stderr, "  Error: %s\n", error_buf.buf);
735                 strbuf_release(&error_buf);
736         }
737
738         fprintf(stderr, "\n Usage: %s\n", *usagestr++);
739         while (*usagestr && **usagestr)
740                 fprintf(stderr, "    or: %s\n", *usagestr++);
741         while (*usagestr) {
742                 fprintf(stderr, "%s%s\n",
743                                 **usagestr ? "    " : "",
744                                 *usagestr);
745                 usagestr++;
746         }
747
748         if (opts->type != OPTION_GROUP)
749                 fputc('\n', stderr);
750
751         ordered = options__order(opts);
752         if (ordered)
753                 opts = ordered;
754
755         for (  ; opts->type != OPTION_END; opts++) {
756                 if (ctx && ctx->argc > 1 && !option__in_argv(opts, ctx))
757                         continue;
758                 print_option_help(opts, full);
759         }
760
761         fputc('\n', stderr);
762
763         free(ordered);
764
765         return PARSE_OPT_HELP;
766 }
767
768 void usage_with_options(const char * const *usagestr,
769                         const struct option *opts)
770 {
771         exit_browser(false);
772         usage_with_options_internal(usagestr, opts, 0, NULL);
773         exit(129);
774 }
775
776 void usage_with_options_msg(const char * const *usagestr,
777                             const struct option *opts, const char *fmt, ...)
778 {
779         va_list ap;
780
781         exit_browser(false);
782
783         va_start(ap, fmt);
784         strbuf_addv(&error_buf, fmt, ap);
785         va_end(ap);
786
787         usage_with_options_internal(usagestr, opts, 0, NULL);
788         exit(129);
789 }
790
791 int parse_options_usage(const char * const *usagestr,
792                         const struct option *opts,
793                         const char *optstr, bool short_opt)
794 {
795         if (!usagestr)
796                 goto opt;
797
798         fprintf(stderr, "\n Usage: %s\n", *usagestr++);
799         while (*usagestr && **usagestr)
800                 fprintf(stderr, "    or: %s\n", *usagestr++);
801         while (*usagestr) {
802                 fprintf(stderr, "%s%s\n",
803                                 **usagestr ? "    " : "",
804                                 *usagestr);
805                 usagestr++;
806         }
807         fputc('\n', stderr);
808
809 opt:
810         for (  ; opts->type != OPTION_END; opts++) {
811                 if (short_opt) {
812                         if (opts->short_name == *optstr) {
813                                 print_option_help(opts, 0);
814                                 break;
815                         }
816                         continue;
817                 }
818
819                 if (opts->long_name == NULL)
820                         continue;
821
822                 if (!prefixcmp(opts->long_name, optstr))
823                         print_option_help(opts, 0);
824                 if (!prefixcmp("no-", optstr) &&
825                     !prefixcmp(opts->long_name, optstr + 3))
826                         print_option_help(opts, 0);
827         }
828
829         return PARSE_OPT_HELP;
830 }
831
832
833 int parse_opt_verbosity_cb(const struct option *opt,
834                            const char *arg __maybe_unused,
835                            int unset)
836 {
837         int *target = opt->value;
838
839         if (unset)
840                 /* --no-quiet, --no-verbose */
841                 *target = 0;
842         else if (opt->short_name == 'v') {
843                 if (*target >= 0)
844                         (*target)++;
845                 else
846                         *target = 1;
847         } else {
848                 if (*target <= 0)
849                         (*target)--;
850                 else
851                         *target = -1;
852         }
853         return 0;
854 }
855
856 void set_option_flag(struct option *opts, int shortopt, const char *longopt,
857                      int flag)
858 {
859         for (; opts->type != OPTION_END; opts++) {
860                 if ((shortopt && opts->short_name == shortopt) ||
861                     (opts->long_name && longopt &&
862                      !strcmp(opts->long_name, longopt))) {
863                         opts->flags |= flag;
864                         break;
865                 }
866         }
867 }