Andrew's git / gitweb.git / parse-options.c
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parse-options.con commit parse-options: clearer reporting of API misuse (1e5ce57)
   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 optbug(const struct option *opt, const char *reason)
  15{
  16        if (opt->long_name)
  17                return error("BUG: option '%s' %s", opt->long_name, reason);
  18        return error("BUG: switch '%c' %s", opt->short_name, reason);
  19}
  20
  21static int opterror(const struct option *opt, const char *reason, int flags)
  22{
  23        if (flags & OPT_SHORT)
  24                return error("switch `%c' %s", opt->short_name, reason);
  25        if (flags & OPT_UNSET)
  26                return error("option `no-%s' %s", opt->long_name, reason);
  27        return error("option `%s' %s", opt->long_name, reason);
  28}
  29
  30static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
  31                   int flags, const char **arg)
  32{
  33        if (p->opt) {
  34                *arg = p->opt;
  35                p->opt = NULL;
  36        } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
  37                *arg = (const char *)opt->defval;
  38        } else if (p->argc > 1) {
  39                p->argc--;
  40                *arg = *++p->argv;
  41        } else
  42                return opterror(opt, "requires a value", flags);
  43        return 0;
  44}
  45
  46static void fix_filename(const char *prefix, const char **file)
  47{
  48        if (!file || !*file || !prefix || is_absolute_path(*file)
  49            || !strcmp("-", *file))
  50                return;
  51        *file = xstrdup(prefix_filename(prefix, strlen(prefix), *file));
  52}
  53
  54static int get_value(struct parse_opt_ctx_t *p,
  55                     const struct option *opt, int flags)
  56{
  57        const char *s, *arg;
  58        const int unset = flags & OPT_UNSET;
  59        int err;
  60
  61        if (unset && p->opt)
  62                return opterror(opt, "takes no value", flags);
  63        if (unset && (opt->flags & PARSE_OPT_NONEG))
  64                return opterror(opt, "isn't available", flags);
  65
  66        if (!(flags & OPT_SHORT) && p->opt) {
  67                switch (opt->type) {
  68                case OPTION_CALLBACK:
  69                        if (!(opt->flags & PARSE_OPT_NOARG))
  70                                break;
  71                        /* FALLTHROUGH */
  72                case OPTION_BOOLEAN:
  73                case OPTION_BIT:
  74                case OPTION_NEGBIT:
  75                case OPTION_SET_INT:
  76                case OPTION_SET_PTR:
  77                        return opterror(opt, "takes no value", flags);
  78                default:
  79                        break;
  80                }
  81        }
  82
  83        switch (opt->type) {
  84        case OPTION_BIT:
  85                if (unset)
  86                        *(int *)opt->value &= ~opt->defval;
  87                else
  88                        *(int *)opt->value |= opt->defval;
  89                return 0;
  90
  91        case OPTION_NEGBIT:
  92                if (unset)
  93                        *(int *)opt->value |= opt->defval;
  94                else
  95                        *(int *)opt->value &= ~opt->defval;
  96                return 0;
  97
  98        case OPTION_BOOLEAN:
  99                *(int *)opt->value = unset ? 0 : *(int *)opt->value + 1;
 100                return 0;
 101
 102        case OPTION_SET_INT:
 103                *(int *)opt->value = unset ? 0 : opt->defval;
 104                return 0;
 105
 106        case OPTION_SET_PTR:
 107                *(void **)opt->value = unset ? NULL : (void *)opt->defval;
 108                return 0;
 109
 110        case OPTION_STRING:
 111                if (unset)
 112                        *(const char **)opt->value = NULL;
 113                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 114                        *(const char **)opt->value = (const char *)opt->defval;
 115                else
 116                        return get_arg(p, opt, flags, (const char **)opt->value);
 117                return 0;
 118
 119        case OPTION_FILENAME:
 120                err = 0;
 121                if (unset)
 122                        *(const char **)opt->value = NULL;
 123                else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 124                        *(const char **)opt->value = (const char *)opt->defval;
 125                else
 126                        err = get_arg(p, opt, flags, (const char **)opt->value);
 127
 128                if (!err)
 129                        fix_filename(p->prefix, (const char **)opt->value);
 130                return err;
 131
 132        case OPTION_CALLBACK:
 133                if (unset)
 134                        return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
 135                if (opt->flags & PARSE_OPT_NOARG)
 136                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 137                if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
 138                        return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
 139                if (get_arg(p, opt, flags, &arg))
 140                        return -1;
 141                return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
 142
 143        case OPTION_INTEGER:
 144                if (unset) {
 145                        *(int *)opt->value = 0;
 146                        return 0;
 147                }
 148                if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
 149                        *(int *)opt->value = opt->defval;
 150                        return 0;
 151                }
 152                if (get_arg(p, opt, flags, &arg))
 153                        return -1;
 154                *(int *)opt->value = strtol(arg, (char **)&s, 10);
 155                if (*s)
 156                        return opterror(opt, "expects a numerical value", flags);
 157                return 0;
 158
 159        default:
 160                die("should not happen, someone must be hit on the forehead");
 161        }
 162}
 163
 164static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
 165{
 166        const struct option *numopt = NULL;
 167
 168        for (; options->type != OPTION_END; options++) {
 169                if (options->short_name == *p->opt) {
 170                        p->opt = p->opt[1] ? p->opt + 1 : NULL;
 171                        return get_value(p, options, OPT_SHORT);
 172                }
 173
 174                /*
 175                 * Handle the numerical option later, explicit one-digit
 176                 * options take precedence over it.
 177                 */
 178                if (options->type == OPTION_NUMBER)
 179                        numopt = options;
 180        }
 181        if (numopt && isdigit(*p->opt)) {
 182                size_t len = 1;
 183                char *arg;
 184                int rc;
 185
 186                while (isdigit(p->opt[len]))
 187                        len++;
 188                arg = xmemdupz(p->opt, len);
 189                p->opt = p->opt[len] ? p->opt + len : NULL;
 190                rc = (*numopt->callback)(numopt, arg, 0) ? (-1) : 0;
 191                free(arg);
 192                return rc;
 193        }
 194        return -2;
 195}
 196
 197static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 198                          const struct option *options)
 199{
 200        const char *arg_end = strchr(arg, '=');
 201        const struct option *abbrev_option = NULL, *ambiguous_option = NULL;
 202        int abbrev_flags = 0, ambiguous_flags = 0;
 203
 204        if (!arg_end)
 205                arg_end = arg + strlen(arg);
 206
 207        for (; options->type != OPTION_END; options++) {
 208                const char *rest;
 209                int flags = 0;
 210
 211                if (!options->long_name)
 212                        continue;
 213
 214                rest = skip_prefix(arg, options->long_name);
 215                if (options->type == OPTION_ARGUMENT) {
 216                        if (!rest)
 217                                continue;
 218                        if (*rest == '=')
 219                                return opterror(options, "takes no value", flags);
 220                        if (*rest)
 221                                continue;
 222                        p->out[p->cpidx++] = arg - 2;
 223                        return 0;
 224                }
 225                if (!rest) {
 226                        /* abbreviated? */
 227                        if (!strncmp(options->long_name, arg, arg_end - arg)) {
 228is_abbreviated:
 229                                if (abbrev_option) {
 230                                        /*
 231                                         * If this is abbreviated, it is
 232                                         * ambiguous. So when there is no
 233                                         * exact match later, we need to
 234                                         * error out.
 235                                         */
 236                                        ambiguous_option = abbrev_option;
 237                                        ambiguous_flags = abbrev_flags;
 238                                }
 239                                if (!(flags & OPT_UNSET) && *arg_end)
 240                                        p->opt = arg_end + 1;
 241                                abbrev_option = options;
 242                                abbrev_flags = flags;
 243                                continue;
 244                        }
 245                        /* negation allowed? */
 246                        if (options->flags & PARSE_OPT_NONEG)
 247                                continue;
 248                        /* negated and abbreviated very much? */
 249                        if (!prefixcmp("no-", arg)) {
 250                                flags |= OPT_UNSET;
 251                                goto is_abbreviated;
 252                        }
 253                        /* negated? */
 254                        if (strncmp(arg, "no-", 3))
 255                                continue;
 256                        flags |= OPT_UNSET;
 257                        rest = skip_prefix(arg + 3, options->long_name);
 258                        /* abbreviated and negated? */
 259                        if (!rest && !prefixcmp(options->long_name, arg + 3))
 260                                goto is_abbreviated;
 261                        if (!rest)
 262                                continue;
 263                }
 264                if (*rest) {
 265                        if (*rest != '=')
 266                                continue;
 267                        p->opt = rest + 1;
 268                }
 269                return get_value(p, options, flags);
 270        }
 271
 272        if (ambiguous_option)
 273                return error("Ambiguous option: %s "
 274                        "(could be --%s%s or --%s%s)",
 275                        arg,
 276                        (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 277                        ambiguous_option->long_name,
 278                        (abbrev_flags & OPT_UNSET) ?  "no-" : "",
 279                        abbrev_option->long_name);
 280        if (abbrev_option)
 281                return get_value(p, abbrev_option, abbrev_flags);
 282        return -2;
 283}
 284
 285static int parse_nodash_opt(struct parse_opt_ctx_t *p, const char *arg,
 286                            const struct option *options)
 287{
 288        for (; options->type != OPTION_END; options++) {
 289                if (!(options->flags & PARSE_OPT_NODASH))
 290                        continue;
 291                if ((options->flags & PARSE_OPT_OPTARG) ||
 292                    !(options->flags & PARSE_OPT_NOARG))
 293                        die("BUG: dashless options don't support arguments");
 294                if (!(options->flags & PARSE_OPT_NONEG))
 295                        die("BUG: dashless options don't support negation");
 296                if (options->long_name)
 297                        die("BUG: dashless options can't be long");
 298                if (options->short_name == arg[0] && arg[1] == '\0')
 299                        return get_value(p, options, OPT_SHORT);
 300        }
 301        return -2;
 302}
 303
 304static void check_typos(const char *arg, const struct option *options)
 305{
 306        if (strlen(arg) < 3)
 307                return;
 308
 309        if (!prefixcmp(arg, "no-")) {
 310                error ("did you mean `--%s` (with two dashes ?)", arg);
 311                exit(129);
 312        }
 313
 314        for (; options->type != OPTION_END; options++) {
 315                if (!options->long_name)
 316                        continue;
 317                if (!prefixcmp(options->long_name, arg)) {
 318                        error ("did you mean `--%s` (with two dashes ?)", arg);
 319                        exit(129);
 320                }
 321        }
 322}
 323
 324static void parse_options_check(const struct option *opts)
 325{
 326        int err = 0;
 327
 328        for (; opts->type != OPTION_END; opts++) {
 329                if ((opts->flags & PARSE_OPT_LASTARG_DEFAULT) &&
 330                    (opts->flags & PARSE_OPT_OPTARG))
 331                        err |= optbug(opts, "uses incompatible flags "
 332                                        "LASTARG_DEFAULT and OPTARG");
 333        }
 334        if (err)
 335                exit(128);
 336}
 337
 338void parse_options_start(struct parse_opt_ctx_t *ctx,
 339                         int argc, const char **argv, const char *prefix,
 340                         const struct option *options, int flags)
 341{
 342        memset(ctx, 0, sizeof(*ctx));
 343        ctx->argc = argc - 1;
 344        ctx->argv = argv + 1;
 345        ctx->out  = argv;
 346        ctx->prefix = prefix;
 347        ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
 348        ctx->flags = flags;
 349        if ((flags & PARSE_OPT_KEEP_UNKNOWN) &&
 350            (flags & PARSE_OPT_STOP_AT_NON_OPTION))
 351                die("STOP_AT_NON_OPTION and KEEP_UNKNOWN don't go together");
 352        parse_options_check(options);
 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        /* we must reset ->opt, unknown short option leave it dangling */
 366        ctx->opt = NULL;
 367
 368        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 369                const char *arg = ctx->argv[0];
 370
 371                if (*arg != '-' || !arg[1]) {
 372                        if (parse_nodash_opt(ctx, arg, options) == 0)
 373                                continue;
 374                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 375                                break;
 376                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 377                        continue;
 378                }
 379
 380                if (arg[1] != '-') {
 381                        ctx->opt = arg + 1;
 382                        if (internal_help && *ctx->opt == 'h')
 383                                return parse_options_usage(ctx, usagestr, options, 0);
 384                        switch (parse_short_opt(ctx, options)) {
 385                        case -1:
 386                                return parse_options_usage(ctx, usagestr, options, 1);
 387                        case -2:
 388                                goto unknown;
 389                        }
 390                        if (ctx->opt)
 391                                check_typos(arg + 1, options);
 392                        while (ctx->opt) {
 393                                if (internal_help && *ctx->opt == 'h')
 394                                        return parse_options_usage(ctx, usagestr, options, 0);
 395                                switch (parse_short_opt(ctx, options)) {
 396                                case -1:
 397                                        return parse_options_usage(ctx, usagestr, options, 1);
 398                                case -2:
 399                                        /* fake a short option thing to hide the fact that we may have
 400                                         * started to parse aggregated stuff
 401                                         *
 402                                         * This is leaky, too bad.
 403                                         */
 404                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 405                                        *(char *)ctx->argv[0] = '-';
 406                                        goto unknown;
 407                                }
 408                        }
 409                        continue;
 410                }
 411
 412                if (!arg[2]) { /* "--" */
 413                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 414                                ctx->argc--;
 415                                ctx->argv++;
 416                        }
 417                        break;
 418                }
 419
 420                if (internal_help && !strcmp(arg + 2, "help-all"))
 421                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 422                if (internal_help && !strcmp(arg + 2, "help"))
 423                        return parse_options_usage(ctx, usagestr, options, 0);
 424                switch (parse_long_opt(ctx, arg + 2, options)) {
 425                case -1:
 426                        return parse_options_usage(ctx, usagestr, options, 1);
 427                case -2:
 428                        goto unknown;
 429                }
 430                continue;
 431unknown:
 432                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 433                        return PARSE_OPT_UNKNOWN;
 434                ctx->out[ctx->cpidx++] = ctx->argv[0];
 435                ctx->opt = NULL;
 436        }
 437        return PARSE_OPT_DONE;
 438}
 439
 440int parse_options_end(struct parse_opt_ctx_t *ctx)
 441{
 442        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 443        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 444        return ctx->cpidx + ctx->argc;
 445}
 446
 447int parse_options(int argc, const char **argv, const char *prefix,
 448                  const struct option *options, const char * const usagestr[],
 449                  int flags)
 450{
 451        struct parse_opt_ctx_t ctx;
 452
 453        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 454        switch (parse_options_step(&ctx, options, usagestr)) {
 455        case PARSE_OPT_HELP:
 456                exit(129);
 457        case PARSE_OPT_DONE:
 458                break;
 459        default: /* PARSE_OPT_UNKNOWN */
 460                if (ctx.argv[0][1] == '-') {
 461                        error("unknown option `%s'", ctx.argv[0] + 2);
 462                } else {
 463                        error("unknown switch `%c'", *ctx.opt);
 464                }
 465                usage_with_options(usagestr, options);
 466        }
 467
 468        return parse_options_end(&ctx);
 469}
 470
 471static int usage_argh(const struct option *opts, FILE *outfile)
 472{
 473        const char *s;
 474        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 475        if (opts->flags & PARSE_OPT_OPTARG)
 476                if (opts->long_name)
 477                        s = literal ? "[=%s]" : "[=<%s>]";
 478                else
 479                        s = literal ? "[%s]" : "[<%s>]";
 480        else
 481                s = literal ? " %s" : " <%s>";
 482        return fprintf(outfile, s, opts->argh ? opts->argh : "...");
 483}
 484
 485#define USAGE_OPTS_WIDTH 24
 486#define USAGE_GAP         2
 487
 488static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 489                                       const char * const *usagestr,
 490                                       const struct option *opts, int full, int err)
 491{
 492        FILE *outfile = err ? stderr : stdout;
 493
 494        if (!usagestr)
 495                return PARSE_OPT_HELP;
 496
 497        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 498                fprintf(outfile, "cat <<\\EOF\n");
 499
 500        fprintf(outfile, "usage: %s\n", *usagestr++);
 501        while (*usagestr && **usagestr)
 502                fprintf(outfile, "   or: %s\n", *usagestr++);
 503        while (*usagestr) {
 504                fprintf(outfile, "%s%s\n",
 505                                **usagestr ? "    " : "",
 506                                *usagestr);
 507                usagestr++;
 508        }
 509
 510        if (opts->type != OPTION_GROUP)
 511                fputc('\n', outfile);
 512
 513        for (; opts->type != OPTION_END; opts++) {
 514                size_t pos;
 515                int pad;
 516
 517                if (opts->type == OPTION_GROUP) {
 518                        fputc('\n', outfile);
 519                        if (*opts->help)
 520                                fprintf(outfile, "%s\n", opts->help);
 521                        continue;
 522                }
 523                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 524                        continue;
 525
 526                pos = fprintf(outfile, "    ");
 527                if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
 528                        if (opts->flags & PARSE_OPT_NODASH)
 529                                pos += fprintf(outfile, "%c", opts->short_name);
 530                        else
 531                                pos += fprintf(outfile, "-%c", opts->short_name);
 532                }
 533                if (opts->long_name && opts->short_name)
 534                        pos += fprintf(outfile, ", ");
 535                if (opts->long_name)
 536                        pos += fprintf(outfile, "--%s%s",
 537                                (opts->flags & PARSE_OPT_NEGHELP) ?  "no-" : "",
 538                                opts->long_name);
 539                if (opts->type == OPTION_NUMBER)
 540                        pos += fprintf(outfile, "-NUM");
 541
 542                if (!(opts->flags & PARSE_OPT_NOARG))
 543                        pos += usage_argh(opts, outfile);
 544
 545                if (pos <= USAGE_OPTS_WIDTH)
 546                        pad = USAGE_OPTS_WIDTH - pos;
 547                else {
 548                        fputc('\n', outfile);
 549                        pad = USAGE_OPTS_WIDTH;
 550                }
 551                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
 552        }
 553        fputc('\n', outfile);
 554
 555        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 556                fputs("EOF\n", outfile);
 557
 558        return PARSE_OPT_HELP;
 559}
 560
 561void usage_with_options(const char * const *usagestr,
 562                        const struct option *opts)
 563{
 564        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 565        exit(129);
 566}
 567
 568void usage_msg_opt(const char *msg,
 569                   const char * const *usagestr,
 570                   const struct option *options)
 571{
 572        fprintf(stderr, "%s\n\n", msg);
 573        usage_with_options(usagestr, options);
 574}
 575
 576static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 577                               const char * const *usagestr,
 578                               const struct option *opts, int err)
 579{
 580        return usage_with_options_internal(ctx, usagestr, opts, 0, err);
 581}
 582
 583
 584/*----- some often used options -----*/
 585#include "cache.h"
 586
 587int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
 588{
 589        int v;
 590
 591        if (!arg) {
 592                v = unset ? 0 : DEFAULT_ABBREV;
 593        } else {
 594                v = strtol(arg, (char **)&arg, 10);
 595                if (*arg)
 596                        return opterror(opt, "expects a numerical value", 0);
 597                if (v && v < MINIMUM_ABBREV)
 598                        v = MINIMUM_ABBREV;
 599                else if (v > 40)
 600                        v = 40;
 601        }
 602        *(int *)(opt->value) = v;
 603        return 0;
 604}
 605
 606int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
 607                             int unset)
 608{
 609        *(unsigned long *)(opt->value) = approxidate(arg);
 610        return 0;
 611}
 612
 613int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
 614                            int unset)
 615{
 616        int value;
 617
 618        if (!arg)
 619                arg = unset ? "never" : (const char *)opt->defval;
 620        value = git_config_colorbool(NULL, arg, -1);
 621        if (value < 0)
 622                return opterror(opt,
 623                        "expects \"always\", \"auto\", or \"never\"", 0);
 624        *(int *)opt->value = value;
 625        return 0;
 626}
 627
 628int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
 629                           int unset)
 630{
 631        int *target = opt->value;
 632
 633        if (unset)
 634                /* --no-quiet, --no-verbose */
 635                *target = 0;
 636        else if (opt->short_name == 'v') {
 637                if (*target >= 0)
 638                        (*target)++;
 639                else
 640                        *target = 1;
 641        } else {
 642                if (*target <= 0)
 643                        (*target)--;
 644                else
 645                        *target = -1;
 646        }
 647        return 0;
 648}
 649
 650int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
 651{
 652        unsigned char sha1[20];
 653        struct commit *commit;
 654
 655        if (!arg)
 656                return -1;
 657        if (get_sha1(arg, sha1))
 658                return error("malformed object name %s", arg);
 659        commit = lookup_commit_reference(sha1);
 660        if (!commit)
 661                return error("no such commit %s", arg);
 662        commit_list_insert(commit, opt->value);
 663        return 0;
 664}
 665
 666int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 667{
 668        int *target = opt->value;
 669        *target = unset ? 2 : 1;
 670        return 0;
 671}
 672
 673int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 674{
 675        int i, j;
 676
 677        for (i = 0; i < dst_size; i++)
 678                if (dst[i].type == OPTION_END)
 679                        break;
 680        for (j = 0; i < dst_size; i++, j++) {
 681                dst[i] = src[j];
 682                if (src[j].type == OPTION_END)
 683                        return 0;
 684        }
 685        return -1;
 686}