Andrew's git - gitweb.git/blob

9bbbc6a5fec7fa3500fe5d830a188717d70ad0c5
   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                         const struct option *options, 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        parse_options_check(options);
 354}
 355
 356static int usage_with_options_internal(struct parse_opt_ctx_t *,
 357                                       const char * const *,
 358                                       const struct option *, int, int);
 359
 360int parse_options_step(struct parse_opt_ctx_t *ctx,
 361                       const struct option *options,
 362                       const char * const usagestr[])
 363{
 364        int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
 365
 366        /* we must reset ->opt, unknown short option leave it dangling */
 367        ctx->opt = NULL;
 368
 369        for (; ctx->argc; ctx->argc--, ctx->argv++) {
 370                const char *arg = ctx->argv[0];
 371
 372                if (*arg != '-' || !arg[1]) {
 373                        if (parse_nodash_opt(ctx, arg, options) == 0)
 374                                continue;
 375                        if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
 376                                break;
 377                        ctx->out[ctx->cpidx++] = ctx->argv[0];
 378                        continue;
 379                }
 380
 381                if (arg[1] != '-') {
 382                        ctx->opt = arg + 1;
 383                        if (internal_help && *ctx->opt == 'h')
 384                                return parse_options_usage(ctx, usagestr, options, 0);
 385                        switch (parse_short_opt(ctx, options)) {
 386                        case -1:
 387                                return parse_options_usage(ctx, usagestr, options, 1);
 388                        case -2:
 389                                goto unknown;
 390                        }
 391                        if (ctx->opt)
 392                                check_typos(arg + 1, options);
 393                        while (ctx->opt) {
 394                                if (internal_help && *ctx->opt == 'h')
 395                                        return parse_options_usage(ctx, usagestr, options, 0);
 396                                switch (parse_short_opt(ctx, options)) {
 397                                case -1:
 398                                        return parse_options_usage(ctx, usagestr, options, 1);
 399                                case -2:
 400                                        /* fake a short option thing to hide the fact that we may have
 401                                         * started to parse aggregated stuff
 402                                         *
 403                                         * This is leaky, too bad.
 404                                         */
 405                                        ctx->argv[0] = xstrdup(ctx->opt - 1);
 406                                        *(char *)ctx->argv[0] = '-';
 407                                        goto unknown;
 408                                }
 409                        }
 410                        continue;
 411                }
 412
 413                if (!arg[2]) { /* "--" */
 414                        if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
 415                                ctx->argc--;
 416                                ctx->argv++;
 417                        }
 418                        break;
 419                }
 420
 421                if (internal_help && !strcmp(arg + 2, "help-all"))
 422                        return usage_with_options_internal(ctx, usagestr, options, 1, 0);
 423                if (internal_help && !strcmp(arg + 2, "help"))
 424                        return parse_options_usage(ctx, usagestr, options, 0);
 425                switch (parse_long_opt(ctx, arg + 2, options)) {
 426                case -1:
 427                        return parse_options_usage(ctx, usagestr, options, 1);
 428                case -2:
 429                        goto unknown;
 430                }
 431                continue;
 432unknown:
 433                if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
 434                        return PARSE_OPT_UNKNOWN;
 435                ctx->out[ctx->cpidx++] = ctx->argv[0];
 436                ctx->opt = NULL;
 437        }
 438        return PARSE_OPT_DONE;
 439}
 440
 441int parse_options_end(struct parse_opt_ctx_t *ctx)
 442{
 443        memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
 444        ctx->out[ctx->cpidx + ctx->argc] = NULL;
 445        return ctx->cpidx + ctx->argc;
 446}
 447
 448int parse_options(int argc, const char **argv, const char *prefix,
 449                  const struct option *options, const char * const usagestr[],
 450                  int flags)
 451{
 452        struct parse_opt_ctx_t ctx;
 453
 454        parse_options_start(&ctx, argc, argv, prefix, options, flags);
 455        switch (parse_options_step(&ctx, options, usagestr)) {
 456        case PARSE_OPT_HELP:
 457                exit(129);
 458        case PARSE_OPT_DONE:
 459                break;
 460        default: /* PARSE_OPT_UNKNOWN */
 461                if (ctx.argv[0][1] == '-') {
 462                        error("unknown option `%s'", ctx.argv[0] + 2);
 463                } else {
 464                        error("unknown switch `%c'", *ctx.opt);
 465                }
 466                usage_with_options(usagestr, options);
 467        }
 468
 469        return parse_options_end(&ctx);
 470}
 471
 472static int usage_argh(const struct option *opts, FILE *outfile)
 473{
 474        const char *s;
 475        int literal = (opts->flags & PARSE_OPT_LITERAL_ARGHELP) || !opts->argh;
 476        if (opts->flags & PARSE_OPT_OPTARG)
 477                if (opts->long_name)
 478                        s = literal ? "[=%s]" : "[=<%s>]";
 479                else
 480                        s = literal ? "[%s]" : "[<%s>]";
 481        else
 482                s = literal ? " %s" : " <%s>";
 483        return fprintf(outfile, s, opts->argh ? opts->argh : "...");
 484}
 485
 486#define USAGE_OPTS_WIDTH 24
 487#define USAGE_GAP         2
 488
 489static int usage_with_options_internal(struct parse_opt_ctx_t *ctx,
 490                                       const char * const *usagestr,
 491                                       const struct option *opts, int full, int err)
 492{
 493        FILE *outfile = err ? stderr : stdout;
 494
 495        if (!usagestr)
 496                return PARSE_OPT_HELP;
 497
 498        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 499                fprintf(outfile, "cat <<\\EOF\n");
 500
 501        fprintf(outfile, "usage: %s\n", *usagestr++);
 502        while (*usagestr && **usagestr)
 503                fprintf(outfile, "   or: %s\n", *usagestr++);
 504        while (*usagestr) {
 505                fprintf(outfile, "%s%s\n",
 506                                **usagestr ? "    " : "",
 507                                *usagestr);
 508                usagestr++;
 509        }
 510
 511        if (opts->type != OPTION_GROUP)
 512                fputc('\n', outfile);
 513
 514        for (; opts->type != OPTION_END; opts++) {
 515                size_t pos;
 516                int pad;
 517
 518                if (opts->type == OPTION_GROUP) {
 519                        fputc('\n', outfile);
 520                        if (*opts->help)
 521                                fprintf(outfile, "%s\n", opts->help);
 522                        continue;
 523                }
 524                if (!full && (opts->flags & PARSE_OPT_HIDDEN))
 525                        continue;
 526
 527                pos = fprintf(outfile, "    ");
 528                if (opts->short_name && !(opts->flags & PARSE_OPT_NEGHELP)) {
 529                        if (opts->flags & PARSE_OPT_NODASH)
 530                                pos += fprintf(outfile, "%c", opts->short_name);
 531                        else
 532                                pos += fprintf(outfile, "-%c", opts->short_name);
 533                }
 534                if (opts->long_name && opts->short_name)
 535                        pos += fprintf(outfile, ", ");
 536                if (opts->long_name)
 537                        pos += fprintf(outfile, "--%s%s",
 538                                (opts->flags & PARSE_OPT_NEGHELP) ?  "no-" : "",
 539                                opts->long_name);
 540                if (opts->type == OPTION_NUMBER)
 541                        pos += fprintf(outfile, "-NUM");
 542
 543                if (!(opts->flags & PARSE_OPT_NOARG))
 544                        pos += usage_argh(opts, outfile);
 545
 546                if (pos <= USAGE_OPTS_WIDTH)
 547                        pad = USAGE_OPTS_WIDTH - pos;
 548                else {
 549                        fputc('\n', outfile);
 550                        pad = USAGE_OPTS_WIDTH;
 551                }
 552                fprintf(outfile, "%*s%s\n", pad + USAGE_GAP, "", opts->help);
 553        }
 554        fputc('\n', outfile);
 555
 556        if (!err && ctx && ctx->flags & PARSE_OPT_SHELL_EVAL)
 557                fputs("EOF\n", outfile);
 558
 559        return PARSE_OPT_HELP;
 560}
 561
 562void usage_with_options(const char * const *usagestr,
 563                        const struct option *opts)
 564{
 565        usage_with_options_internal(NULL, usagestr, opts, 0, 1);
 566        exit(129);
 567}
 568
 569void usage_msg_opt(const char *msg,
 570                   const char * const *usagestr,
 571                   const struct option *options)
 572{
 573        fprintf(stderr, "%s\n\n", msg);
 574        usage_with_options(usagestr, options);
 575}
 576
 577static int parse_options_usage(struct parse_opt_ctx_t *ctx,
 578                               const char * const *usagestr,
 579                               const struct option *opts, int err)
 580{
 581        return usage_with_options_internal(ctx, usagestr, opts, 0, err);
 582}
 583
 584
 585/*----- some often used options -----*/
 586#include "cache.h"
 587
 588int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
 589{
 590        int v;
 591
 592        if (!arg) {
 593                v = unset ? 0 : DEFAULT_ABBREV;
 594        } else {
 595                v = strtol(arg, (char **)&arg, 10);
 596                if (*arg)
 597                        return opterror(opt, "expects a numerical value", 0);
 598                if (v && v < MINIMUM_ABBREV)
 599                        v = MINIMUM_ABBREV;
 600                else if (v > 40)
 601                        v = 40;
 602        }
 603        *(int *)(opt->value) = v;
 604        return 0;
 605}
 606
 607int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
 608                             int unset)
 609{
 610        *(unsigned long *)(opt->value) = approxidate(arg);
 611        return 0;
 612}
 613
 614int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
 615                            int unset)
 616{
 617        int value;
 618
 619        if (!arg)
 620                arg = unset ? "never" : (const char *)opt->defval;
 621        value = git_config_colorbool(NULL, arg, -1);
 622        if (value < 0)
 623                return opterror(opt,
 624                        "expects \"always\", \"auto\", or \"never\"", 0);
 625        *(int *)opt->value = value;
 626        return 0;
 627}
 628
 629int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
 630                           int unset)
 631{
 632        int *target = opt->value;
 633
 634        if (unset)
 635                /* --no-quiet, --no-verbose */
 636                *target = 0;
 637        else if (opt->short_name == 'v') {
 638                if (*target >= 0)
 639                        (*target)++;
 640                else
 641                        *target = 1;
 642        } else {
 643                if (*target <= 0)
 644                        (*target)--;
 645                else
 646                        *target = -1;
 647        }
 648        return 0;
 649}
 650
 651int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
 652{
 653        unsigned char sha1[20];
 654        struct commit *commit;
 655
 656        if (!arg)
 657                return -1;
 658        if (get_sha1(arg, sha1))
 659                return error("malformed object name %s", arg);
 660        commit = lookup_commit_reference(sha1);
 661        if (!commit)
 662                return error("no such commit %s", arg);
 663        commit_list_insert(commit, opt->value);
 664        return 0;
 665}
 666
 667int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 668{
 669        int *target = opt->value;
 670        *target = unset ? 2 : 1;
 671        return 0;
 672}
 673
 674int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 675{
 676        int i, j;
 677
 678        for (i = 0; i < dst_size; i++)
 679                if (dst[i].type == OPTION_END)
 680                        break;
 681        for (j = 0; i < dst_size; i++, j++) {
 682                dst[i] = src[j];
 683                if (src[j].type == OPTION_END)
 684                        return 0;
 685        }
 686        return -1;
 687}