#include "util.h" #include "parse-options.h" #include "cache.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 parse_options_usage(usagestr, options); switch (parse_short_opt(ctx, options)) { case -1: return parse_options_usage(usagestr, options); case -2: goto unknown; default: break; } if (ctx->opt) check_typos(arg + 1, options); while (ctx->opt) { if (internal_help && *ctx->opt == 'h') return parse_options_usage(usagestr, options); switch (parse_short_opt(ctx, options)) { case -1: return parse_options_usage(usagestr, options); 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 parse_options_usage(usagestr, options); switch (parse_long_opt(ctx, arg + 2, options)) { case -1: return parse_options_usage(usagestr, options); 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; 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; 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 int usage_with_options_internal(const char * const *usagestr, const struct option *opts, int full) { if (!usagestr) return PARSE_OPT_HELP; fprintf(stderr, "\n usage: %s\n", *usagestr++); while (*usagestr && **usagestr) fprintf(stderr, " or: %s\n", *usagestr++); while (*usagestr) { fprintf(stderr, "%s%s\n", **usagestr ? " " : "", *usagestr); usagestr++; } if (opts->type != OPTION_GROUP) fputc('\n', stderr); for (; opts->type != OPTION_END; opts++) { size_t pos; int pad; if (opts->type == OPTION_GROUP) { fputc('\n', stderr); if (*opts->help) fprintf(stderr, "%s\n", opts->help); continue; } if (!full && (opts->flags & PARSE_OPT_HIDDEN)) continue; pos = fprintf(stderr, " "); if (opts->short_name) pos += fprintf(stderr, "-%c", opts->short_name); 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 pos += fprintf(stderr, " <%s>", opts->argh); } else { if (opts->flags & PARSE_OPT_OPTARG) if (opts->long_name) pos += fprintf(stderr, "[=...]"); else pos += fprintf(stderr, "[...]"); else pos += fprintf(stderr, " ..."); } break; default: /* OPTION_{BIT,BOOLEAN,SET_UINT,SET_PTR} */ case OPTION_END: case OPTION_GROUP: case OPTION_BIT: case OPTION_BOOLEAN: case OPTION_INCR: case OPTION_SET_UINT: case OPTION_SET_PTR: break; } if (pos <= USAGE_OPTS_WIDTH) pad = USAGE_OPTS_WIDTH - pos; else { fputc('\n', stderr); pad = USAGE_OPTS_WIDTH; } fprintf(stderr, "%*s%s\n", pad + USAGE_GAP, "", opts->help); } fputc('\n', stderr); return PARSE_OPT_HELP; } void usage_with_options(const char * const *usagestr, const struct option *opts) { exit_browser(false); usage_with_options_internal(usagestr, opts, 0); exit(129); } int parse_options_usage(const char * const *usagestr, const struct option *opts) { return usage_with_options_internal(usagestr, opts, 0); } int parse_opt_verbosity_cb(const struct option *opt, const char *arg __used, int unset) { int *target = opt->value; if (unset) /* --no-quiet, --no-verbose */ *target = 0; else if (opt->short_name == 'v') { if (*target >= 0) (*target)++; else *target = 1; } else { if (*target <= 0) (*target)--; else *target = -1; } return 0; }