[thirdparty/git.git] / parse-options.c

#include "git-compat-util.h"
#include "parse-options.h"

#define OPT_SHORT 1
#define OPT_UNSET 2

struct optparse_t {
	const char **argv;
	const char **out;
	int argc, cpidx;
	const char *opt;
};

static inline const char *get_arg(struct optparse_t *p)
{
	if (p->opt) {
		const char *res = p->opt;
		p->opt = NULL;
		return res;
	}
	p->argc--;
	return *++p->argv;
}

static inline const char *skip_prefix(const char *str, const char *prefix)
{
	size_t len = strlen(prefix);
	return strncmp(str, prefix, len) ? NULL : str + len;
}

static int opterror(const struct option *opt, const char *reason, int flags)
{
	if (flags & OPT_SHORT)
		return error("switch `%c' %s", opt->short_name, reason);
	if (flags & OPT_UNSET)
		return error("option `no-%s' %s", opt->long_name, reason);
	return error("option `%s' %s", opt->long_name, reason);
}

static int get_value(struct optparse_t *p,
                     const struct option *opt, int flags)
{
	const char *s, *arg;
	const int unset = flags & OPT_UNSET;

	if (unset && p->opt)
		return opterror(opt, "takes no value", flags);
	if (unset && (opt->flags & PARSE_OPT_NONEG))
		return opterror(opt, "isn't available", flags);

	if (!(flags & OPT_SHORT) && p->opt) {
		switch (opt->type) {
		case OPTION_CALLBACK:
			if (!(opt->flags & PARSE_OPT_NOARG))
				break;
			/* FALLTHROUGH */
		case OPTION_BOOLEAN:
		case OPTION_BIT:
		case OPTION_SET_INT:
		case OPTION_SET_PTR:
			return opterror(opt, "takes no value", flags);
		default:
			break;
		}
	}

	arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
	switch (opt->type) {
	case OPTION_BIT:
		if (unset)
			*(int *)opt->value &= ~opt->defval;
		else
			*(int *)opt->value |= opt->defval;
		return 0;

	case OPTION_BOOLEAN:
		*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
		return 0;

	case OPTION_SET_INT:
		*(int *)opt->value = unset ? 0 : opt->defval;
		return 0;

	case OPTION_SET_PTR:
		*(void **)opt->value = unset ? NULL : (void *)opt->defval;
		return 0;

	case OPTION_STRING:
		if (unset) {
			*(const char **)opt->value = NULL;
			return 0;
		}
		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
			*(const char **)opt->value = (const char *)opt->defval;
			return 0;
		}
		if (!arg)
			return opterror(opt, "requires a value", flags);
		*(const char **)opt->value = get_arg(p);
		return 0;

	case OPTION_CALLBACK:
		if (unset)
			return (*opt->callback)(opt, NULL, 1);
		if (opt->flags & PARSE_OPT_NOARG)
			return (*opt->callback)(opt, NULL, 0);
		if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
			return (*opt->callback)(opt, NULL, 0);
		if (!arg)
			return opterror(opt, "requires a value", flags);
		return (*opt->callback)(opt, get_arg(p), 0);

	case OPTION_INTEGER:
		if (unset) {
			*(int *)opt->value = 0;
			return 0;
		}
		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
			*(int *)opt->value = opt->defval;
			return 0;
		}
		if (!arg)
			return opterror(opt, "requires a value", flags);
		*(int *)opt->value = strtol(get_arg(p), (char **)&s, 10);
		if (*s)
			return opterror(opt, "expects a numerical value", flags);
		return 0;

	default:
		die("should not happen, someone must be hit on the forehead");
	}
}

static int parse_short_opt(struct optparse_t *p, const struct option *options)
{
	for (; options->type != OPTION_END; options++) {
		if (options->short_name == *p->opt) {
			p->opt = p->opt[1] ? p->opt + 1 : NULL;
			return get_value(p, options, OPT_SHORT);
		}
	}
	return error("unknown switch `%c'", *p->opt);
}

static int parse_long_opt(struct optparse_t *p, const char *arg,
                          const struct option *options)
{
	const char *arg_end = strchr(arg, '=');
	const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
	int abbrev_flags = 0, ambiguous_flags = 0;

	if (!arg_end)
		arg_end = arg + strlen(arg);

	for (; options->type != OPTION_END; options++) {
		const char *rest;
		int flags = 0;

		if (!options->long_name)
			continue;

		rest = skip_prefix(arg, options->long_name);
		if (options->type == OPTION_ARGUMENT) {
			if (!rest)
				continue;
			if (*rest == '=')
				return opterror(options, "takes no value", flags);
			if (*rest)
				continue;
			p->out[p->cpidx++] = arg - 2;
			return 0;
		}
		if (!rest) {
			/* abbreviated? */
			if (!strncmp(options->long_name, arg, arg_end - arg)) {
is_abbreviated:
				if (abbrev_option) {
					/*
					 * If this is abbreviated, it is
					 * ambiguous. So when there is no
					 * exact match later, we need to
					 * error out.
					 */
					ambiguous_option = abbrev_option;
					ambiguous_flags = abbrev_flags;
				}
				if (!(flags & OPT_UNSET) && *arg_end)
					p->opt = arg_end + 1;
				abbrev_option = options;
				abbrev_flags = flags;
				continue;
			}
			/* negated and abbreviated very much? */
			if (!prefixcmp("no-", arg)) {
				flags |= OPT_UNSET;
				goto is_abbreviated;
			}
			/* negated? */
			if (strncmp(arg, "no-", 3))
				continue;
			flags |= OPT_UNSET;
			rest = skip_prefix(arg + 3, options->long_name);
			/* abbreviated and negated? */
			if (!rest && !prefixcmp(options->long_name, arg + 3))
				goto is_abbreviated;
			if (!rest)
				continue;
		}
		if (*rest) {
			if (*rest != '=')
				continue;
			p->opt = rest + 1;
		}
		return get_value(p, options, flags);
	}

	if (ambiguous_option)
		return error("Ambiguous option: %s "
			"(could be --%s%s or --%s%s)",
			arg,
			(ambiguous_flags & OPT_UNSET) ?  "no-" : "",
			ambiguous_option->long_name,
			(abbrev_flags & OPT_UNSET) ?  "no-" : "",
			abbrev_option->long_name);
	if (abbrev_option)
		return get_value(p, abbrev_option, abbrev_flags);
	return error("unknown option `%s'", arg);
}

void check_typos(const char *arg, const struct option *options)
{
	if (strlen(arg) < 3)
		return;

	if (!prefixcmp(arg, "no-")) {
		error ("did you mean `--%s` (with two dashes ?)", arg);
		exit(129);
	}

	for (; options->type != OPTION_END; options++) {
		if (!options->long_name)
			continue;
		if (!prefixcmp(options->long_name, arg)) {
			error ("did you mean `--%s` (with two dashes ?)", arg);
			exit(129);
		}
	}
}

static NORETURN void usage_with_options_internal(const char * const *,
                                                 const struct option *, int);

int parse_options(int argc, const char **argv, const struct option *options,
                  const char * const usagestr[], int flags)
{
	struct optparse_t args = { argv + 1, argv, argc - 1, 0, NULL };

	for (; args.argc; args.argc--, args.argv++) {
		const char *arg = args.argv[0];

		if (*arg != '-' || !arg[1]) {
			if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
				break;
			args.out[args.cpidx++] = args.argv[0];
			continue;
		}

		if (arg[1] != '-') {
			args.opt = arg + 1;
			if (*args.opt == 'h')
				usage_with_options(usagestr, options);
			if (parse_short_opt(&args, options) < 0)
				usage_with_options(usagestr, options);
			if (args.opt)
				check_typos(arg + 1, options);
			while (args.opt) {
				if (*args.opt == 'h')
					usage_with_options(usagestr, options);
				if (parse_short_opt(&args, options) < 0)
					usage_with_options(usagestr, options);
			}
			continue;
		}

		if (!arg[2]) { /* "--" */
			if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
				args.argc--;
				args.argv++;
			}
			break;
		}

		if (!strcmp(arg + 2, "help-all"))
			usage_with_options_internal(usagestr, options, 1);
		if (!strcmp(arg + 2, "help"))
			usage_with_options(usagestr, options);
		if (parse_long_opt(&args, arg + 2, options))
			usage_with_options(usagestr, options);
	}

	memmove(args.out + args.cpidx, args.argv, args.argc * sizeof(*args.out));
	args.out[args.cpidx + args.argc] = NULL;
	return args.cpidx + args.argc;
}

#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP         2

void usage_with_options_internal(const char * const *usagestr,
                                 const struct option *opts, int full)
{
	fprintf(stderr, "usage: %s\n", *usagestr++);
	while (*usagestr && **usagestr)
		fprintf(stderr, "   or: %s\n", *usagestr++);
	while (*usagestr)
		fprintf(stderr, "    %s\n", *usagestr++);

	if (opts->type != OPTION_GROUP)
		fputc('\n', stderr);

	for (; opts->type != OPTION_END; opts++) {
		size_t pos;
		int pad;

		if (opts->type == OPTION_GROUP) {
			fputc('\n', stderr);
			if (*opts->help)
				fprintf(stderr, "%s\n", opts->help);
			continue;
		}
		if (!full && (opts->flags & PARSE_OPT_HIDDEN))
			continue;

		pos = fprintf(stderr, "    ");
		if (opts->short_name)
			pos += fprintf(stderr, "-%c", opts->short_name);
		if (opts->long_name && opts->short_name)
			pos += fprintf(stderr, ", ");
		if (opts->long_name)
			pos += fprintf(stderr, "--%s", opts->long_name);

		switch (opts->type) {
		case OPTION_ARGUMENT:
			break;
		case OPTION_INTEGER:
			if (opts->flags & PARSE_OPT_OPTARG)
				if (opts->long_name)
					pos += fprintf(stderr, "[=<n>]");
				else
					pos += fprintf(stderr, "[<n>]");
			else
				pos += fprintf(stderr, " <n>");
			break;
		case OPTION_CALLBACK:
			if (opts->flags & PARSE_OPT_NOARG)
				break;
			/* FALLTHROUGH */
		case OPTION_STRING:
			if (opts->argh) {
				if (opts->flags & PARSE_OPT_OPTARG)
					if (opts->long_name)
						pos += fprintf(stderr, "[=<%s>]", opts->argh);
					else
						pos += fprintf(stderr, "[<%s>]", opts->argh);
				else
					pos += fprintf(stderr, " <%s>", opts->argh);
			} else {
				if (opts->flags & PARSE_OPT_OPTARG)
					if (opts->long_name)
						pos += fprintf(stderr, "[=...]");
					else
						pos += fprintf(stderr, "[...]");
				else
					pos += fprintf(stderr, " ...");
			}
			break;
		default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
			break;
		}

		if (pos <= USAGE_OPTS_WIDTH)
			pad = USAGE_OPTS_WIDTH - pos;
		else {
			fputc('\n', stderr);
			pad = USAGE_OPTS_WIDTH;
		}
		fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
	}
	fputc('\n', stderr);

	exit(129);
}

void usage_with_options(const char * const *usagestr,
                        const struct option *opts)
{
	usage_with_options_internal(usagestr, opts, 0);
}

/*----- some often used options -----*/
#include "cache.h"

int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
{
	int v;

	if (!arg) {
		v = unset ? 0 : DEFAULT_ABBREV;
	} else {
		v = strtol(arg, (char **)&arg, 10);
		if (*arg)
			return opterror(opt, "expects a numerical value", 0);
		if (v && v < MINIMUM_ABBREV)
			v = MINIMUM_ABBREV;
		else if (v > 40)
			v = 40;
	}
	*(int *)(opt->value) = v;
	return 0;
}

int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
			     int unset)
{
	*(unsigned long *)(opt->value) = approxidate(arg);
	return 0;
}
Commit	Line	Data
4a59fd13 PH	1	#include "git-compat-util.h"
4a59fd13 PH	2	#include "parse-options.h"
4a59fd13 PH	3
	4	#define OPT_SHORT 1
	5	#define OPT_UNSET 2
	6
	7	struct optparse_t {
	8	const char **argv;
580d5bff PH	9	const char **out;
580d5bff PH	10	int argc, cpidx;
4a59fd13 PH	11	const char *opt;
	12	};
	13
	14	static inline const char get_arg(struct optparse_t p)
	15	{
	16	if (p->opt) {
	17	const char *res = p->opt;
	18	p->opt = NULL;
	19	return res;
	20	}
	21	p->argc--;
	22	return *++p->argv;
	23	}
	24
	25	static inline const char skip_prefix(const char str, const char *prefix)
	26	{
	27	size_t len = strlen(prefix);
	28	return strncmp(str, prefix, len) ? NULL : str + len;
	29	}
	30
	31	static int opterror(const struct option opt, const char reason, int flags)
	32	{
	33	if (flags & OPT_SHORT)
	34	return error("switch `%c' %s", opt->short_name, reason);
	35	if (flags & OPT_UNSET)
	36	return error("option `no-%s' %s", opt->long_name, reason);
	37	return error("option `%s' %s", opt->long_name, reason);
	38	}
	39
	40	static int get_value(struct optparse_t *p,
	41	const struct option *opt, int flags)
	42	{
ffe659f9	43	const char s, arg;
db7244bd	44	const int unset = flags & OPT_UNSET;
4a59fd13	45
db7244bd	46	if (unset && p->opt)
4a59fd13	47	return opterror(opt, "takes no value", flags);
db7244bd PH	48	if (unset && (opt->flags & PARSE_OPT_NONEG))
db7244bd PH	49	return opterror(opt, "isn't available", flags);
4a59fd13	50
db7244bd PH	51	if (!(flags & OPT_SHORT) && p->opt) {
	52	switch (opt->type) {
	53	case OPTION_CALLBACK:
	54	if (!(opt->flags & PARSE_OPT_NOARG))
	55	break;
	56	/* FALLTHROUGH */
	57	case OPTION_BOOLEAN:
	58	case OPTION_BIT:
	59	case OPTION_SET_INT:
	60	case OPTION_SET_PTR:
4a59fd13	61	return opterror(opt, "takes no value", flags);
db7244bd PH	62	default:
	63	break;
	64	}
	65	}
	66
	67	arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
	68	switch (opt->type) {
	69	case OPTION_BIT:
	70	if (unset)
	71	(int )opt->value &= ~opt->defval;
4a59fd13	72	else
db7244bd PH	73	(int )opt->value \|= opt->defval;
	74	return 0;
	75
	76	case OPTION_BOOLEAN:
	77	(int )opt->value = unset ? 0 : (int )opt->value + 1;
	78	return 0;
	79
	80	case OPTION_SET_INT:
	81	(int )opt->value = unset ? 0 : opt->defval;
	82	return 0;
	83
	84	case OPTION_SET_PTR:
	85	(void )opt->value = unset ? NULL : (void )opt->defval;
4a59fd13 PH	86	return 0;
	87
	88	case OPTION_STRING:
db7244bd PH	89	if (unset) {
db7244bd PH	90	(const char *)opt->value = NULL;
4a59fd13 PH	91	return 0;
4a59fd13 PH	92	}
c43a2483	93	if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
ffe659f9 PH	94	(const char )opt->value = (const char )opt->defval;
	95	return 0;
	96	}
	97	if (!arg)
4a59fd13 PH	98	return opterror(opt, "requires a value", flags);
	99	(const char *)opt->value = get_arg(p);
	100	return 0;
	101
ffe659f9	102	case OPTION_CALLBACK:
db7244bd	103	if (unset)
ffe659f9	104	return (*opt->callback)(opt, NULL, 1);
db7244bd	105	if (opt->flags & PARSE_OPT_NOARG)
f481e22a	106	return (*opt->callback)(opt, NULL, 0);
c43a2483	107	if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
ffe659f9 PH	108	return (*opt->callback)(opt, NULL, 0);
	109	if (!arg)
	110	return opterror(opt, "requires a value", flags);
	111	return (*opt->callback)(opt, get_arg(p), 0);
	112
4a59fd13	113	case OPTION_INTEGER:
db7244bd	114	if (unset) {
4a59fd13 PH	115	(int )opt->value = 0;
	116	return 0;
	117	}
c43a2483	118	if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
ffe659f9 PH	119	(int )opt->value = opt->defval;
	120	return 0;
	121	}
	122	if (!arg)
4a59fd13 PH	123	return opterror(opt, "requires a value", flags);
	124	(int )opt->value = strtol(get_arg(p), (char **)&s, 10);
	125	if (*s)
	126	return opterror(opt, "expects a numerical value", flags);
	127	return 0;
	128
	129	default:
	130	die("should not happen, someone must be hit on the forehead");
	131	}
	132	}
	133
	134	static int parse_short_opt(struct optparse_t p, const struct option options)
	135	{
	136	for (; options->type != OPTION_END; options++) {
	137	if (options->short_name == *p->opt) {
	138	p->opt = p->opt[1] ? p->opt + 1 : NULL;
	139	return get_value(p, options, OPT_SHORT);
	140	}
	141	}
	142	return error("unknown switch `%c'", *p->opt);
	143	}
	144
	145	static int parse_long_opt(struct optparse_t p, const char arg,
	146	const struct option *options)
	147	{
7f275b91	148	const char *arg_end = strchr(arg, '=');
243e0614 JS	149	const struct option abbrev_option = NULL, ambiguous_option = NULL;
243e0614 JS	150	int abbrev_flags = 0, ambiguous_flags = 0;
7f275b91 JS	151
	152	if (!arg_end)
	153	arg_end = arg + strlen(arg);
	154
4a59fd13 PH	155	for (; options->type != OPTION_END; options++) {
	156	const char *rest;
	157	int flags = 0;
	158
	159	if (!options->long_name)
	160	continue;
	161
	162	rest = skip_prefix(arg, options->long_name);
580d5bff PH	163	if (options->type == OPTION_ARGUMENT) {
	164	if (!rest)
	165	continue;
	166	if (*rest == '=')
	167	return opterror(options, "takes no value", flags);
	168	if (*rest)
	169	continue;
	170	p->out[p->cpidx++] = arg - 2;
	171	return 0;
	172	}
4a59fd13	173	if (!rest) {
7f275b91 JS	174	/* abbreviated? */
	175	if (!strncmp(options->long_name, arg, arg_end - arg)) {
	176	is_abbreviated:
243e0614 JS	177	if (abbrev_option) {
	178	/*
	179	* If this is abbreviated, it is
	180	* ambiguous. So when there is no
	181	* exact match later, we need to
	182	* error out.
	183	*/
	184	ambiguous_option = abbrev_option;
	185	ambiguous_flags = abbrev_flags;
	186	}
7f275b91 JS	187	if (!(flags & OPT_UNSET) && *arg_end)
	188	p->opt = arg_end + 1;
	189	abbrev_option = options;
	190	abbrev_flags = flags;
	191	continue;
	192	}
	193	/* negated and abbreviated very much? */
	194	if (!prefixcmp("no-", arg)) {
	195	flags \|= OPT_UNSET;
	196	goto is_abbreviated;
	197	}
	198	/* negated? */
4a59fd13 PH	199	if (strncmp(arg, "no-", 3))
	200	continue;
	201	flags \|= OPT_UNSET;
	202	rest = skip_prefix(arg + 3, options->long_name);
7f275b91 JS	203	/* abbreviated and negated? */
	204	if (!rest && !prefixcmp(options->long_name, arg + 3))
	205	goto is_abbreviated;
4a59fd13 PH	206	if (!rest)
	207	continue;
	208	}
	209	if (*rest) {
	210	if (*rest != '=')
	211	continue;
	212	p->opt = rest + 1;
	213	}
	214	return get_value(p, options, flags);
	215	}
243e0614 JS	216
	217	if (ambiguous_option)
	218	return error("Ambiguous option: %s "
	219	"(could be --%s%s or --%s%s)",
	220	arg,
	221	(ambiguous_flags & OPT_UNSET) ? "no-" : "",
	222	ambiguous_option->long_name,
	223	(abbrev_flags & OPT_UNSET) ? "no-" : "",
	224	abbrev_option->long_name);
7f275b91 JS	225	if (abbrev_option)
7f275b91 JS	226	return get_value(p, abbrev_option, abbrev_flags);
4a59fd13 PH	227	return error("unknown option `%s'", arg);
	228	}
	229
3a9f0f41 PH	230	void check_typos(const char arg, const struct option options)
	231	{
	232	if (strlen(arg) < 3)
	233	return;
	234
	235	if (!prefixcmp(arg, "no-")) {
	236	error ("did you mean `--%s` (with two dashes ?)", arg);
	237	exit(129);
	238	}
	239
	240	for (; options->type != OPTION_END; options++) {
	241	if (!options->long_name)
	242	continue;
	243	if (!prefixcmp(options->long_name, arg)) {
	244	error ("did you mean `--%s` (with two dashes ?)", arg);
	245	exit(129);
	246	}
	247	}
	248	}
	249
dd3bf0f4 PH	250	static NORETURN void usage_with_options_internal(const char * const *,
	251	const struct option *, int);
	252
4a59fd13	253	int parse_options(int argc, const char *argv, const struct option options,
d7a38c54	254	const char * const usagestr[], int flags)
4a59fd13	255	{
580d5bff	256	struct optparse_t args = { argv + 1, argv, argc - 1, 0, NULL };
4a59fd13 PH	257
	258	for (; args.argc; args.argc--, args.argv++) {
	259	const char *arg = args.argv[0];
	260
	261	if (*arg != '-' \|\| !arg[1]) {
a0ec9d25 JS	262	if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
a0ec9d25 JS	263	break;
580d5bff	264	args.out[args.cpidx++] = args.argv[0];
4a59fd13 PH	265	continue;
	266	}
	267
	268	if (arg[1] != '-') {
	269	args.opt = arg + 1;
3a9f0f41 PH	270	if (*args.opt == 'h')
	271	usage_with_options(usagestr, options);
	272	if (parse_short_opt(&args, options) < 0)
	273	usage_with_options(usagestr, options);
	274	if (args.opt)
	275	check_typos(arg + 1, options);
	276	while (args.opt) {
4a59fd13	277	if (*args.opt == 'h')
d7a38c54	278	usage_with_options(usagestr, options);
4a59fd13	279	if (parse_short_opt(&args, options) < 0)
d7a38c54	280	usage_with_options(usagestr, options);
3a9f0f41	281	}
4a59fd13 PH	282	continue;
	283	}
	284
	285	if (!arg[2]) { /* "--" */
	286	if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
	287	args.argc--;
	288	args.argv++;
	289	}
	290	break;
	291	}
	292
dd3bf0f4 PH	293	if (!strcmp(arg + 2, "help-all"))
dd3bf0f4 PH	294	usage_with_options_internal(usagestr, options, 1);
4a59fd13	295	if (!strcmp(arg + 2, "help"))
d7a38c54	296	usage_with_options(usagestr, options);
4a59fd13	297	if (parse_long_opt(&args, arg + 2, options))
d7a38c54	298	usage_with_options(usagestr, options);
4a59fd13 PH	299	}
4a59fd13 PH	300
580d5bff PH	301	memmove(args.out + args.cpidx, args.argv, args.argc * sizeof(*args.out));
	302	args.out[args.cpidx + args.argc] = NULL;
	303	return args.cpidx + args.argc;
4a59fd13	304	}
d7a38c54 PH	305
	306	#define USAGE_OPTS_WIDTH 24
	307	#define USAGE_GAP 2
	308
dd3bf0f4 PH	309	void usage_with_options_internal(const char * const *usagestr,
dd3bf0f4 PH	310	const struct option *opts, int full)
d7a38c54	311	{
f389c808 AR	312	fprintf(stderr, "usage: %s\n", *usagestr++);
	313	while (usagestr && *usagestr)
	314	fprintf(stderr, " or: %s\n", *usagestr++);
	315	while (*usagestr)
	316	fprintf(stderr, " %s\n", *usagestr++);
d7a38c54 PH	317
d7a38c54 PH	318	if (opts->type != OPTION_GROUP)
f389c808	319	fputc('\n', stderr);
d7a38c54 PH	320
	321	for (; opts->type != OPTION_END; opts++) {
	322	size_t pos;
	323	int pad;
	324
	325	if (opts->type == OPTION_GROUP) {
f389c808	326	fputc('\n', stderr);
d7a38c54	327	if (*opts->help)
f389c808	328	fprintf(stderr, "%s\n", opts->help);
d7a38c54 PH	329	continue;
d7a38c54 PH	330	}
dd3bf0f4 PH	331	if (!full && (opts->flags & PARSE_OPT_HIDDEN))
dd3bf0f4 PH	332	continue;
d7a38c54	333
f389c808	334	pos = fprintf(stderr, " ");
d7a38c54	335	if (opts->short_name)
f389c808	336	pos += fprintf(stderr, "-%c", opts->short_name);
d7a38c54	337	if (opts->long_name && opts->short_name)
f389c808	338	pos += fprintf(stderr, ", ");
d7a38c54	339	if (opts->long_name)
f389c808	340	pos += fprintf(stderr, "--%s", opts->long_name);
d7a38c54 PH	341
d7a38c54 PH	342	switch (opts->type) {
580d5bff PH	343	case OPTION_ARGUMENT:
580d5bff PH	344	break;
d7a38c54	345	case OPTION_INTEGER:
ffe659f9	346	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	347	if (opts->long_name)
	348	pos += fprintf(stderr, "[=<n>]");
	349	else
	350	pos += fprintf(stderr, "[<n>]");
ffe659f9 PH	351	else
ffe659f9 PH	352	pos += fprintf(stderr, " <n>");
d7a38c54	353	break;
ffe659f9	354	case OPTION_CALLBACK:
f481e22a PH	355	if (opts->flags & PARSE_OPT_NOARG)
	356	break;
	357	/* FALLTHROUGH */
	358	case OPTION_STRING:
ffe659f9 PH	359	if (opts->argh) {
ffe659f9 PH	360	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	361	if (opts->long_name)
	362	pos += fprintf(stderr, "[=<%s>]", opts->argh);
	363	else
	364	pos += fprintf(stderr, "[<%s>]", opts->argh);
ffe659f9 PH	365	else
	366	pos += fprintf(stderr, " <%s>", opts->argh);
	367	} else {
	368	if (opts->flags & PARSE_OPT_OPTARG)
6422f633 MB	369	if (opts->long_name)
	370	pos += fprintf(stderr, "[=...]");
	371	else
	372	pos += fprintf(stderr, "[...]");
ffe659f9 PH	373	else
	374	pos += fprintf(stderr, " ...");
	375	}
d7a38c54	376	break;
db7244bd	377	default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
d7a38c54 PH	378	break;
	379	}
	380
f389c808 AR	381	if (pos <= USAGE_OPTS_WIDTH)
f389c808 AR	382	pad = USAGE_OPTS_WIDTH - pos;
d7a38c54	383	else {
f389c808	384	fputc('\n', stderr);
d7a38c54 PH	385	pad = USAGE_OPTS_WIDTH;
d7a38c54 PH	386	}
f389c808	387	fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
d7a38c54	388	}
f389c808 AR	389	fputc('\n', stderr);
	390
	391	exit(129);
d7a38c54	392	}
0ce865b1	393
dd3bf0f4 PH	394	void usage_with_options(const char * const *usagestr,
	395	const struct option *opts)
	396	{
	397	usage_with_options_internal(usagestr, opts, 0);
	398	}
	399
0ce865b1 PH	400	/----- some often used options -----/
0ce865b1 PH	401	#include "cache.h"
db7244bd	402
0ce865b1 PH	403	int parse_opt_abbrev_cb(const struct option opt, const char arg, int unset)
	404	{
	405	int v;
	406
	407	if (!arg) {
	408	v = unset ? 0 : DEFAULT_ABBREV;
	409	} else {
	410	v = strtol(arg, (char **)&arg, 10);
	411	if (*arg)
	412	return opterror(opt, "expects a numerical value", 0);
	413	if (v && v < MINIMUM_ABBREV)
	414	v = MINIMUM_ABBREV;
	415	else if (v > 40)
	416	v = 40;
	417	}
	418	(int )(opt->value) = v;
	419	return 0;
	420	}
1f4a711a MB	421
	422	int parse_opt_approxidate_cb(const struct option opt, const char arg,
	423	int unset)
	424	{
	425	(unsigned long )(opt->value) = approxidate(arg);
	426	return 0;
	427	}