Andrew's git / gitweb.git / parse-options.c
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parse-options.con commit t/t9001-send-email.sh: fix stderr redirection in 'Invalid In-Reply-To' (5b57413)
   1#include "git-compat-util.h"
   2#include "parse-options.h"
   3#include "cache.h"
   4#include "commit.h"
   5#include "color.h"
   6
   7static int parse_options_usage(struct parse_opt_ctx_t *ctx,
   8                               const char * const *usagestr,
   9                               const struct option *opts, int err);
  10
  11#define OPT_SHORT 1
  12#define OPT_UNSET 2
  13
  14static int opterror(const struct option *opt, const char *reason, int flags)
  15{
  16        if (flags & OPT_SHORT)
  17                return error("switch `%c' %s", opt->short_name, reason);
  18        if (flags & OPT_UNSET)
  19                return error("option `no-%s' %s", opt->long_name, reason);
  20        return error("option `%s' %s", opt->long_name, reason);
  21}
  22
  23static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  24                   int flags, const char **arg)
  25{
  26        if (p->opt) {
  27                *arg = p->opt;
  28                p->opt = NULL;
  29        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  30                *arg = (const char *)opt->defval;
  31        } else if (p->argc > 1) {
  32                p->argc--;
  33                *arg = *++p->argv;
  34        } else
  35                return opterror(opt, "requires a value", flags);
  36        return 0;
  37}
  38
  39static void fix_filename(const char *prefix, const char **file)
  40{
  41        if (!file || !*file || !prefix || is_absolute_path(*file)
  42            || !strcmp("-", *file))
  43                return;
  44        *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
  45}
  46
  47static int get_value(struct parse_opt_ctx_t *p,
  48                     const struct option *opt, int flags)
  49{
  50        const char *s, *arg;
  51        const int unset = flags & OPT_UNSET;
  52        int err;
  53
  54        if (unset && p->opt)
  55                return opterror(opt, "takes no value", flags);
  56        if (unset && (opt->flags & PARSE_OPT_NONEG))
  57                return opterror(opt, "isn't available", flags);
  58
  59        if (!(flags & OPT_SHORT) && p->opt) {
  60                switch (opt->type) {
  61                case OPTION_CALLBACK:
  62                        if (!(opt->flags & PARSE_OPT_NOARG))
  63                                break;
  64                        /* FALLTHROUGH */
  65                case OPTION_BOOLEAN:
  66                case OPTION_BIT:
  67                case OPTION_NEGBIT:
  68                case OPTION_SET_INT:
  69                case OPTION_SET_PTR:
  70                        return opterror(opt, "takes no value", flags);
  71                default:
  72                        break;
  73                }
  74        }
  75
  76        switch (opt->type) {
  77        case OPTION_BIT:
  78                if (unset)
  79                        *(int *)opt->value &= ~opt->defval;
  80                else
  81                        *(int *)opt->value |= opt->defval;
  82                return 0;
  83
  84        case OPTION_NEGBIT:
  85                if (unset)
  86                        *(int *)opt->value |= opt->defval;
  87                else
  88                        *(int *)opt->value &= ~opt->defval;
  89                return 0;
  90
  91        case OPTION_BOOLEAN:
  92                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
  93                return 0;
  94
  95        case OPTION_SET_INT:
  96                *(int *)opt->value = unset ? 0 : opt->defval;
  97                return 0;
  98
  99        case OPTION_SET_PTR:
 100                *(void **)opt->value = unset ? NULL : (void *)opt->defval;
 101                return 0;
 102
 103        case OPTION_STRING:
 104                if (unset)
 105                        *(const char **)opt->value = NULL;
 106                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 107                        *(const char **)opt->value = (const char *)opt->defval;
 108                else
 109                        return get_arg(p, opt, flags, (const char **)opt->value);
 110                return 0;
 111
 112        case OPTION_FILENAME:
 113                err = 0;
 114                if (unset)
 115                        *(const char **)opt->value = NULL;
 116                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 117                        *(const char **)opt->value = (const char *)opt->defval;
 118                else
 119                        err = get_arg(p, opt, flags, (const char **)opt->value);
 120
 121                if (!err)
 122                        fix_filename(p->prefix, (const char **)opt->value);
 123                return err;
 124
 125        case OPTION_CALLBACK:
 126                if (unset)
 127                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 128                if (opt->flags & PARSE_OPT_NOARG)
 129                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 130                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 131                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 132                if (get_arg(p, opt, flags, &arg))
 133                        return -1;
 134                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 135
 136        case OPTION_INTEGER:
 137                if (unset) {
 138                        *(int *)opt->value = 0;
 139                        return 0;
 140                }
 141                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 142                        *(int *)opt->value = opt->defval;
 143                        return 0;
 144                }
 145                if (get_arg(p, opt, flags, &arg))
 146                        return -1;
 147                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 148                if (*s)
 149                        return opterror(opt, "expects a numerical value", flags);
 150                return 0;
 151
 152        default:
 153                die("should not happen, someone must be hit on the forehead");
 154        }
 155}
 156
 157static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 158{
 159        const struct option *numopt = NULL;
 160
 161        for (; options->type != OPTION_END; options++) {
 162                if (options->short_name == *p->opt) {
 163                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 164                        return get_value(p, options, OPT_SHORT);
 165                }
 166
 167                /*
 168                 * Handle the numerical option later, explicit one-digit
 169                 * options take precedence over it.
 170                 */
 171                if (options->type == OPTION_NUMBER)
 172                        numopt = options;
 173        }
 174        if (numopt && isdigit(*p->opt)) {
 175                size_t len = 1;
 176                char *arg;
 177                int rc;
 178
 179                while (isdigit(p->opt[len]))
 180                        len++;
 181                arg = xmemdupz(p->opt, len);
 182                p->opt = p->opt[len] ? p->opt + len : NULL;
 183                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 184                free(arg);
 185                return rc;
 186        }
 187        return -2;
 188}
 189
 190static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 191                          const struct option *options)
 192{
 193        const char *arg_end = strchr(arg, '=');
 194        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 195        int abbrev_flags = 0, ambiguous_flags = 0;
 196
 197        if (!arg_end)
 198                arg_end = arg + strlen(arg);
 199
 200        for (; options->type != OPTION_END; options++) {
 201                const char *rest;
 202                int flags = 0;
 203
 204                if (!options->long_name)
 205                        continue;
 206
 207                rest = skip_prefix(arg, options->long_name);
 208                if (options->type == OPTION_ARGUMENT) {
 209                        if (!rest)
 210                                continue;
 211                        if (*rest == '=')
 212                                return opterror(options, "takes no value", flags);
 213                        if (*rest)
 214                                continue;
 215                        p->out[p->cpidx++] = arg - 2;
 216                        return 0;
 217                }
 218                if (!rest) {
 219                        /* abbreviated? */
 220                        if (!strncmp(options->long_name, arg, arg_end - arg)) {
 221is_abbreviated:
 222                                if (abbrev_option) {
 223                                        /*
 224                                         * If this is abbreviated, it is
 225                                         * ambiguous. So when there is no
 226                                         * exact match later, we need to
 227                                         * error out.
 228                                         */
 229                                        ambiguous_option = abbrev_option;
 230                                        ambiguous_flags = abbrev_flags;
 231                                }
 232                                if (!(flags & OPT_UNSET) && *arg_end)
 233                                        p->opt = arg_end + 1;
 234                                abbrev_option = options;
 235                                abbrev_flags = flags;
 236                                continue;
 237                        }
 238                        /* negation allowed? */
 239                        if (options->flags & PARSE_OPT_NONEG)
 240                                continue;
 241                        /* negated and abbreviated very much? */
 242                        if (!prefixcmp("no-", arg)) {
 243                                flags |= OPT_UNSET;
 244                                goto is_abbreviated;
 245                        }
 246                        /* negated? */
 247                        if (strncmp(arg, "no-", 3))
 248                                continue;
 249                        flags |= OPT_UNSET;
 250                        rest = skip_prefix(arg + 3, options->long_name);
 251                        /* abbreviated and negated? */
 252                        if (!rest && !prefixcmp(options->long_name, arg + 3))
 253                                goto is_abbreviated;
 254                        if (!rest)
 255                                continue;
 256                }
 257                if (*rest) {
 258                        if (*rest != '=')
 259                                continue;
 260                        p->opt = rest + 1;
 261                }
 262                return get_value(p, options, flags);
 263        }
 264
 265        if (ambiguous_option)
 266                return error("Ambiguous option: %s "
 267                        "(could be --%s%s or --%s%s)",
 268                        arg,
 269                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 270                        ambiguous_option->long_name,
 271                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 272                        abbrev_option->long_name);
 273        if (abbrev_option)
 274                return get_value(p, abbrev_option, abbrev_flags);
 275        return -2;
 276}
 277
 278static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 279                            const struct option *options)
 280{
 281        for (; options->type != OPTION_END; options++) {
 282                if (!(options->flags & PARSE_OPT_NODASH))
 283                        continue;
 284                if ((options->flags & PARSE_OPT_OPTARG) ||
 285                    !(options->flags & PARSE_OPT_NOARG))
 286                        die("BUG: dashless options don't support arguments");
 287                if (!(options->flags & PARSE_OPT_NONEG))
 288                        die("BUG: dashless options don't support negation");
 289                if (options->long_name)
 290                        die("BUG: dashless options can't be long");
 291                if (options->short_name == arg[0] && arg[1] == '\0')
 292                        return get_value(p, options, OPT_SHORT);
 293        }
 294        return -2;
 295}
 296
 297static void check_typos(const char *arg, const struct option *options)
 298{
 299        if (strlen(arg) < 3)
 300                return;
 301
 302        if (!prefixcmp(arg, "no-")) {
 303                error ("did you mean `--%s` (with two dashes ?)", arg);
 304                exit(129);
 305        }
 306
 307        for (; options->type != OPTION_END; options++) {
 308                if (!options->long_name)
 309                        continue;
 310                if (!prefixcmp(options->long_name, arg)) {
 311                        error ("did you mean `--%s` (with two dashes ?)", arg);
 312                        exit(129);
 313                }
 314        }
 315}
 316
 317static void parse_options_check(const struct option *opts)
 318{
 319        int err = 0;
 320
 321        for (; opts->type != OPTION_END; opts++) {
 322                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 323                    (opts->flags & PARSE_OPT_OPTARG)) {
 324                        if (opts->long_name) {
 325                                error("`--%s` uses incompatible flags "
 326                                      "LASTARG_DEFAULT and OPTARG", opts->long_name);
 327                        } else {
 328                                error("`-%c` uses incompatible flags "
 329                                      "LASTARG_DEFAULT and OPTARG", opts->short_name);
 330                        }
 331                        err |= 1;
 332                }
 333        }
 334
 335        if (err)
 336                exit(129);
 337}
 338
 339void parse_options_start(struct parse_opt_ctx_t *ctx,
 340                         int argc, const char **argv, const char *prefix,
 341                         int flags)
 342{
 343        memset(ctx, 0, sizeof(*ctx));
 344        ctx->argc = argc - 1;
 345        ctx->argv = argv + 1;
 346        ctx->out  = argv;
 347        ctx->prefix = prefix;
 348        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 349        ctx->flags = flags;
 350        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 351            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 352                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 353}
 354
 355static int usage_with_options_internal(struct parse_opt_ctx_t *,
 356                                       const char * const *,
 357                                       const struct option *, int, int);
 358
 359int parse_options_step(struct parse_opt_ctx_t *ctx,
 360                       const struct option *options,
 361                       const char * const usagestr[])
 362{
 363        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 364
 365        parse_options_check(options);
 366
 367        /* we must reset ->opt, unknown short option leave it dangling */
 368        ctx->opt = NULL;
 369
 370        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 371                const char *arg = ctx->argv[0];
 372
 373                if (*arg != '-' || !arg[1]) {
 374                        if (parse_nodash_opt(ctx, arg, options) == 0)
 375                                continue;
 376                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 377                                break;
 378                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 379                        continue;
 380                }
 381
 382                if (arg[1] != '-') {
 383                        ctx->opt = arg + 1;
 384                        if (internal_help && *ctx->opt == 'h')
 385                                return parse_options_usage(ctx, usagestr, options, 0);
 386                        switch (parse_short_opt(ctx, options)) {
 387                        case -1:
 388                                return parse_options_usage(ctx, usagestr, options, 1);
 389                        case -2:
 390                                goto unknown;
 391                        }
 392                        if (ctx->opt)
 393                                check_typos(arg + 1, options);
 394                        while (ctx->opt) {
 395                                if (internal_help && *ctx->opt == 'h')
 396                                        return parse_options_usage(ctx, usagestr, options, 0);
 397                                switch (parse_short_opt(ctx, options)) {
 398                                case -1:
 399                                        return parse_options_usage(ctx, usagestr, options, 1);
 400                                case -2:
 401                                        /* fake a short option thing to hide the fact that we may have
 402                                         * started to parse aggregated stuff
 403                                         *
 404                                         * This is leaky, too bad.
 405                                         */
 406                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 407                                        *(char *)ctx->argv[0] = '-';
 408                                        goto unknown;
 409                                }
 410                        }
 411                        continue;
 412                }
 413
 414                if (!arg[2]) { /* "--" */
 415                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 416                                ctx->argc--;
 417                                ctx->argv++;
 418                        }
 419                        break;
 420                }
 421
 422                if (internal_help && !strcmp(arg + 2, "help-all"))
 423                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 424                if (internal_help && !strcmp(arg + 2, "help"))
 425                        return parse_options_usage(ctx, usagestr, options, 0);
 426                switch (parse_long_opt(ctx, arg + 2, options)) {
 427                case -1:
 428                        return parse_options_usage(ctx, usagestr, options, 1);
 429                case -2:
 430                        goto unknown;
 431                }
 432                continue;
 433unknown:
 434                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 435                        return PARSE_OPT_UNKNOWN;
 436                ctx->out[ctx->cpidx++] = ctx->argv[0];
 437                ctx->opt = NULL;
 438        }
 439        return PARSE_OPT_DONE;
 440}
 441
 442int parse_options_end(struct parse_opt_ctx_t *ctx)
 443{
 444        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 445        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 446        return ctx->cpidx + ctx->argc;
 447}
 448
 449int parse_options(int argc, const char **argv, const char *prefix,
 450                  const struct option *options, const char * const usagestr[],
 451                  int flags)
 452{
 453        struct parse_opt_ctx_t ctx;
 454
 455        parse_options_start(&ctx, argc, argv, prefix, flags);
 456        switch (parse_options_step(&ctx, options, usagestr)) {
 457        case PARSE_OPT_HELP:
 458                exit(129);
 459        case PARSE_OPT_DONE:
 460                break;
 461        default: /* PARSE_OPT_UNKNOWN */
 462                if (ctx.argv[0][1] == '-') {
 463                        error("unknown option `%s'", ctx.argv[0] + 2);
 464                } else {
 465                        error("unknown switch `%c'", *ctx.opt);
 466                }
 467                usage_with_options(usagestr, options);
 468        }
 469
 470        return parse_options_end(&ctx);
 471}
 472
 473static int usage_argh(const struct option *opts, FILE *outfile)
 474{
 475        const char *s;
 476        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 477        if (opts->flags & PARSE_OPT_OPTARG)
 478                if (opts->long_name)
 479                        s = literal ? "[=%s]" : "[=<%s>]";
 480                else
 481                        s = literal ? "[%s]" : "[<%s>]";
 482        else
 483                s = literal ? " %s" : " <%s>";
 484        return fprintf(outfile, s, opts->argh ? opts->argh : "...");
 485}
 486
 487#define USAGE_OPTS_WIDTH 24
 488#define USAGE_GAP         2
 489
 490static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 491                                       const char * const *usagestr,
 492                                       const struct option *opts, int full, int err)
 493{
 494        FILE *outfile = err ? stderr : stdout;
 495
 496        if (!usagestr)
 497                return PARSE_OPT_HELP;
 498
 499        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 500                fprintf(outfile, "cat <<\\EOF\n");
 501
 502        fprintf(outfile, "usage: %s\n", *usagestr++);
 503        while (*usagestr && **usagestr)
 504                fprintf(outfile, "   or: %s\n", *usagestr++);
 505        while (*usagestr) {
 506                fprintf(outfile, "%s%s\n",
 507                                **usagestr ? "    " : "",
 508                                *usagestr);
 509                usagestr++;
 510        }
 511
 512        if (opts->type != OPTION_GROUP)
 513                fputc('\n', outfile);
 514
 515        for (; opts->type != OPTION_END; opts++) {
 516                size_t pos;
 517                int pad;
 518
 519                if (opts->type == OPTION_GROUP) {
 520                        fputc('\n', outfile);
 521                        if (*opts->help)
 522                                fprintf(outfile, "%s\n", opts->help);
 523                        continue;
 524                }
 525                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 526                        continue;
 527
 528                pos = fprintf(outfile, "    ");
 529                if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
 530                        if (opts->flags & PARSE_OPT_NODASH)
 531                                pos += fprintf(outfile, "%c", opts->short_name);
 532                        else
 533                                pos += fprintf(outfile, "-%c", opts->short_name);
 534                }
 535                if (opts->long_name && opts->short_name)
 536                        pos += fprintf(outfile, ", ");
 537                if (opts->long_name)
 538                        pos += fprintf(outfile, "--%s%s",
 539                                (opts->flags & PARSE_OPT_NEGHELP) ?  "no-" : "",
 540                                opts->long_name);
 541                if (opts->type == OPTION_NUMBER)
 542                        pos += fprintf(outfile, "-NUM");
 543
 544                if (!(opts->flags & PARSE_OPT_NOARG))
 545                        pos += usage_argh(opts, outfile);
 546
 547                if (pos <= USAGE_OPTS_WIDTH)
 548                        pad = USAGE_OPTS_WIDTH - pos;
 549                else {
 550                        fputc('\n', outfile);
 551                        pad = USAGE_OPTS_WIDTH;
 552                }
 553                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
 554        }
 555        fputc('\n', outfile);
 556
 557        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 558                fputs("EOF\n", outfile);
 559
 560        return PARSE_OPT_HELP;
 561}
 562
 563void usage_with_options(const char * const *usagestr,
 564                        const struct option *opts)
 565{
 566        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 567        exit(129);
 568}
 569
 570void usage_msg_opt(const char *msg,
 571                   const char * const *usagestr,
 572                   const struct option *options)
 573{
 574        fprintf(stderr, "%s\n\n", msg);
 575        usage_with_options(usagestr, options);
 576}
 577
 578static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 579                               const char * const *usagestr,
 580                               const struct option *opts, int err)
 581{
 582        return usage_with_options_internal(ctx, usagestr, opts, 0, err);
 583}
 584
 585
 586/*----- some often used options -----*/
 587#include "cache.h"
 588
 589int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
 590{
 591        int v;
 592
 593        if (!arg) {
 594                v = unset ? 0 : DEFAULT_ABBREV;
 595        } else {
 596                v = strtol(arg, (char **)&arg, 10);
 597                if (*arg)
 598                        return opterror(opt, "expects a numerical value", 0);
 599                if (v && v < MINIMUM_ABBREV)
 600                        v = MINIMUM_ABBREV;
 601                else if (v > 40)
 602                        v = 40;
 603        }
 604        *(int *)(opt->value) = v;
 605        return 0;
 606}
 607
 608int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
 609                             int unset)
 610{
 611        *(unsigned long *)(opt->value) = approxidate(arg);
 612        return 0;
 613}
 614
 615int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
 616                            int unset)
 617{
 618        int value;
 619
 620        if (!arg)
 621                arg = unset ? "never" : (const char *)opt->defval;
 622        value = git_config_colorbool(NULL, arg, -1);
 623        if (value < 0)
 624                return opterror(opt,
 625                        "expects \"always\", \"auto\", or \"never\"", 0);
 626        *(int *)opt->value = value;
 627        return 0;
 628}
 629
 630int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
 631                           int unset)
 632{
 633        int *target = opt->value;
 634
 635        if (unset)
 636                /* --no-quiet, --no-verbose */
 637                *target = 0;
 638        else if (opt->short_name == 'v') {
 639                if (*target >= 0)
 640                        (*target)++;
 641                else
 642                        *target = 1;
 643        } else {
 644                if (*target <= 0)
 645                        (*target)--;
 646                else
 647                        *target = -1;
 648        }
 649        return 0;
 650}
 651
 652int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
 653{
 654        unsigned char sha1[20];
 655        struct commit *commit;
 656
 657        if (!arg)
 658                return -1;
 659        if (get_sha1(arg, sha1))
 660                return error("malformed object name %s", arg);
 661        commit = lookup_commit_reference(sha1);
 662        if (!commit)
 663                return error("no such commit %s", arg);
 664        commit_list_insert(commit, opt->value);
 665        return 0;
 666}
 667
 668int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 669{
 670        int *target = opt->value;
 671        *target = unset ? 2 : 1;
 672        return 0;
 673}
 674
 675int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 676{
 677        int i, j;
 678
 679        for (i = 0; i < dst_size; i++)
 680                if (dst[i].type == OPTION_END)
 681                        break;
 682        for (j = 0; i < dst_size; i++, j++) {
 683                dst[i] = src[j];
 684                if (src[j].type == OPTION_END)
 685                        return 0;
 686        }
 687        return -1;
 688}