#include "util.h"#include "parse-options.h"#include "cache.h"#include "header.h" #define OPT_SHORT 1#define OPT_UNSET 2 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_arg(struct parse_opt_ctx_t *p, const struct option *opt,		   int flags, const char **arg){	if (p->opt) {		*arg = p->opt;		p->opt = NULL;	} else if ((opt->flags & PARSE_OPT_LASTARG_DEFAULT) && (p->argc == 1 ||		    **(p->argv + 1) == '-')) {		*arg = (const char *)opt->defval;	} else if (p->argc > 1) {		p->argc--;		*arg = *++p->argv;	} else		return opterror(opt, "requires a value", flags);	return 0;} static int get_value(struct parse_opt_ctx_t *p,		     const struct option *opt, int flags){	const char *s, *arg = NULL;	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_INCR:		case OPTION_BIT:		case OPTION_SET_UINT:		case OPTION_SET_PTR:			return opterror(opt, "takes no value", flags);		case OPTION_END:		case OPTION_ARGUMENT:		case OPTION_GROUP:		case OPTION_STRING:		case OPTION_INTEGER:		case OPTION_UINTEGER:		case OPTION_LONG:		case OPTION_U64:		default:			break;		}	} 	switch (opt->type) {	case OPTION_BIT:		if (unset)			*(int *)opt->value &= ~opt->defval;		else			*(int *)opt->value |= opt->defval;		return 0; 	case OPTION_BOOLEAN:		*(bool *)opt->value = unset ? false : true;		return 0; 	case OPTION_INCR:		*(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;		return 0; 	case OPTION_SET_UINT:		*(unsigned 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;		else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)			*(const char **)opt->value = (const char *)opt->defval;		else			return get_arg(p, opt, flags, (const char **)opt->value);		return 0; 	case OPTION_CALLBACK:		if (unset)			return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;		if (opt->flags & PARSE_OPT_NOARG)			return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;		if (opt->flags & PARSE_OPT_OPTARG && !p->opt)			return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;		if (get_arg(p, opt, flags, &arg))			return -1;		return (*opt->callback)(opt, arg, 0) ? (-1) : 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 (get_arg(p, opt, flags, &arg))			return -1;		*(int *)opt->value = strtol(arg, (char **)&s, 10);		if (*s)			return opterror(opt, "expects a numerical value", flags);		return 0; 	case OPTION_UINTEGER:		if (unset) {			*(unsigned int *)opt->value = 0;			return 0;		}		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {			*(unsigned int *)opt->value = opt->defval;			return 0;		}		if (get_arg(p, opt, flags, &arg))			return -1;		*(unsigned int *)opt->value = strtol(arg, (char **)&s, 10);		if (*s)			return opterror(opt, "expects a numerical value", flags);		return 0; 	case OPTION_LONG:		if (unset) {			*(long *)opt->value = 0;			return 0;		}		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {			*(long *)opt->value = opt->defval;			return 0;		}		if (get_arg(p, opt, flags, &arg))			return -1;		*(long *)opt->value = strtol(arg, (char **)&s, 10);		if (*s)			return opterror(opt, "expects a numerical value", flags);		return 0; 	case OPTION_U64:		if (unset) {			*(u64 *)opt->value = 0;			return 0;		}		if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {			*(u64 *)opt->value = opt->defval;			return 0;		}		if (get_arg(p, opt, flags, &arg))			return -1;		*(u64 *)opt->value = strtoull(arg, (char **)&s, 10);		if (*s)			return opterror(opt, "expects a numerical value", flags);		return 0; 	case OPTION_END:	case OPTION_ARGUMENT:	case OPTION_GROUP:	default:		die("should not happen, someone must be hit on the forehead");	}} static int parse_short_opt(struct parse_opt_ctx_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 -2;} static int parse_long_opt(struct parse_opt_ctx_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 -2;} static 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);		}	}} void parse_options_start(struct parse_opt_ctx_t *ctx,			 int argc, const char **argv, int flags){	memset(ctx, 0, sizeof(*ctx));	ctx->argc = argc - 1;	ctx->argv = argv + 1;	ctx->out  = argv;	ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);	ctx->flags = flags;	if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&	    (flags & PARSE_OPT_STOP_AT_NON_OPTION))		die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");} static int usage_with_options_internal(const char * const *,				       const struct option *, int); int parse_options_step(struct parse_opt_ctx_t *ctx,		       const struct option *options,		       const char * const usagestr[]){	int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP); 	/* we must reset ->opt, unknown short option leave it dangling */	ctx->opt = NULL; 	for (; ctx->argc; ctx->argc--, ctx->argv++) {		const char *arg = ctx->argv[0]; 		if (*arg != '-' || !arg[1]) {			if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)				break;			ctx->out[ctx->cpidx++] = ctx->argv[0];			continue;		} 		if (arg[1] != '-') {			ctx->opt = arg + 1;			if (internal_help && *ctx->opt == 'h')				return usage_with_options_internal(usagestr, options, 0);			switch (parse_short_opt(ctx, options)) {			case -1:				return parse_options_usage(usagestr, options, arg + 1, 1);			case -2:				goto unknown;			default:				break;			}			if (ctx->opt)				check_typos(arg + 1, options);			while (ctx->opt) {				if (internal_help && *ctx->opt == 'h')					return usage_with_options_internal(usagestr, options, 0);				arg = ctx->opt;				switch (parse_short_opt(ctx, options)) {				case -1:					return parse_options_usage(usagestr, options, arg, 1);				case -2:					/* fake a short option thing to hide the fact that we may have					 * started to parse aggregated stuff					 *					 * This is leaky, too bad.					 */					ctx->argv[0] = strdup(ctx->opt - 1);					*(char *)ctx->argv[0] = '-';					goto unknown;				default:					break;				}			}			continue;		} 		if (!arg[2]) { /* "--" */			if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {				ctx->argc--;				ctx->argv++;			}			break;		} 		if (internal_help && !strcmp(arg + 2, "help-all"))			return usage_with_options_internal(usagestr, options, 1);		if (internal_help && !strcmp(arg + 2, "help"))			return usage_with_options_internal(usagestr, options, 0);		if (!strcmp(arg + 2, "list-opts"))			return PARSE_OPT_LIST;		switch (parse_long_opt(ctx, arg + 2, options)) {		case -1:			return parse_options_usage(usagestr, options, arg + 2, 0);		case -2:			goto unknown;		default:			break;		}		continue;unknown:		if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))			return PARSE_OPT_UNKNOWN;		ctx->out[ctx->cpidx++] = ctx->argv[0];		ctx->opt = NULL;	}	return PARSE_OPT_DONE;} int parse_options_end(struct parse_opt_ctx_t *ctx){	memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));	ctx->out[ctx->cpidx + ctx->argc] = NULL;	return ctx->cpidx + ctx->argc;} int parse_options(int argc, const char **argv, const struct option *options,		  const char * const usagestr[], int flags){	struct parse_opt_ctx_t ctx; 	perf_header__set_cmdline(argc, argv); 	parse_options_start(&ctx, argc, argv, flags);	switch (parse_options_step(&ctx, options, usagestr)) {	case PARSE_OPT_HELP:		exit(129);	case PARSE_OPT_DONE:		break;	case PARSE_OPT_LIST:		while (options->type != OPTION_END) {			printf("--%s ", options->long_name);			options++;		}		exit(130);	default: /* PARSE_OPT_UNKNOWN */		if (ctx.argv[0][1] == '-') {			error("unknown option `%s'", ctx.argv[0] + 2);		} else {			error("unknown switch `%c'", *ctx.opt);		}		usage_with_options(usagestr, options);	} 	return parse_options_end(&ctx);} #define USAGE_OPTS_WIDTH 24#define USAGE_GAP         2 static void print_option_help(const struct option *opts, int full){	size_t pos;	int pad; 	if (opts->type == OPTION_GROUP) {		fputc('\n', stderr);		if (*opts->help)			fprintf(stderr, "%s\n", opts->help);		return;	}	if (!full && (opts->flags & PARSE_OPT_HIDDEN))		return; 	pos = fprintf(stderr, "    ");	if (opts->short_name)		pos += fprintf(stderr, "-%c", opts->short_name);	else		pos += fprintf(stderr, "    "); 	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_LONG:	case OPTION_U64:	case OPTION_INTEGER:	case OPTION_UINTEGER:		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

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