| #ifndef PARSE_OPTIONS_H |
| #define PARSE_OPTIONS_H |
| |
| enum parse_opt_type { |
| /* special types */ |
| OPTION_END, |
| OPTION_ARGUMENT, |
| OPTION_GROUP, |
| OPTION_NUMBER, |
| /* options with no arguments */ |
| OPTION_BIT, |
| OPTION_NEGBIT, |
| OPTION_COUNTUP, |
| OPTION_SET_INT, |
| OPTION_CMDMODE, |
| /* options with arguments (usually) */ |
| OPTION_STRING, |
| OPTION_INTEGER, |
| OPTION_CALLBACK, |
| OPTION_LOWLEVEL_CALLBACK, |
| OPTION_FILENAME |
| }; |
| |
| enum parse_opt_flags { |
| PARSE_OPT_KEEP_DASHDASH = 1, |
| PARSE_OPT_STOP_AT_NON_OPTION = 2, |
| PARSE_OPT_KEEP_ARGV0 = 4, |
| PARSE_OPT_KEEP_UNKNOWN = 8, |
| PARSE_OPT_NO_INTERNAL_HELP = 16 |
| }; |
| |
| enum parse_opt_option_flags { |
| PARSE_OPT_OPTARG = 1, |
| PARSE_OPT_NOARG = 2, |
| PARSE_OPT_NONEG = 4, |
| PARSE_OPT_HIDDEN = 8, |
| PARSE_OPT_LASTARG_DEFAULT = 16, |
| PARSE_OPT_NODASH = 32, |
| PARSE_OPT_LITERAL_ARGHELP = 64, |
| PARSE_OPT_SHELL_EVAL = 256 |
| }; |
| |
| struct option; |
| typedef int parse_opt_cb(const struct option *, const char *arg, int unset); |
| |
| struct parse_opt_ctx_t; |
| typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx, |
| const struct option *opt, int unset); |
| |
| /* |
| * `type`:: |
| * holds the type of the option, you must have an OPTION_END last in your |
| * array. |
| * |
| * `short_name`:: |
| * the character to use as a short option name, '\0' if none. |
| * |
| * `long_name`:: |
| * the long option name, without the leading dashes, NULL if none. |
| * |
| * `value`:: |
| * stores pointers to the values to be filled. |
| * |
| * `argh`:: |
| * token to explain the kind of argument this option wants. Keep it |
| * homogeneous across the repository. Should be wrapped by N_() for |
| * translation. |
| * |
| * `help`:: |
| * the short help associated to what the option does. |
| * Must never be NULL (except for OPTION_END). |
| * OPTION_GROUP uses this pointer to store the group header. |
| * Should be wrapped by N_() for translation. |
| * |
| * `flags`:: |
| * mask of parse_opt_option_flags. |
| * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs) |
| * PARSE_OPT_NOARG: says that this option does not take an argument |
| * PARSE_OPT_NONEG: says that this option cannot be negated |
| * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and |
| * shown only in the full usage. |
| * PARSE_OPT_LASTARG_DEFAULT: says that this option will take the default |
| * value if no argument is given when the option |
| * is last on the command line. If the option is |
| * not last it will require an argument. |
| * Should not be used with PARSE_OPT_OPTARG. |
| * PARSE_OPT_NODASH: this option doesn't start with a dash. |
| * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets |
| * (i.e. '<argh>') in the help message. |
| * Useful for options with multiple parameters. |
| * |
| * `callback`:: |
| * pointer to the callback to use for OPTION_CALLBACK or |
| * OPTION_LOWLEVEL_CALLBACK. |
| * |
| * `defval`:: |
| * default value to fill (*->value) with for PARSE_OPT_OPTARG. |
| * OPTION_{BIT,SET_INT} store the {mask,integer,pointer} to put in |
| * the value when met. |
| * CALLBACKS can use it like they want. |
| */ |
| struct option { |
| enum parse_opt_type type; |
| int short_name; |
| const char *long_name; |
| void *value; |
| const char *argh; |
| const char *help; |
| |
| int flags; |
| parse_opt_cb *callback; |
| intptr_t defval; |
| }; |
| |
| #define OPT_END() { OPTION_END } |
| #define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \ |
| (h), PARSE_OPT_NOARG} |
| #define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) } |
| #define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), \ |
| PARSE_OPT_NOARG, NULL, (b) } |
| #define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG, NULL, (b) } |
| #define OPT_COUNTUP(s, l, v, h) { OPTION_COUNTUP, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG } |
| #define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG, NULL, (i) } |
| #define OPT_BOOL(s, l, v, h) OPT_SET_INT(s, l, v, h, 1) |
| #define OPT_HIDDEN_BOOL(s, l, v, h) { OPTION_SET_INT, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1} |
| #define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) } |
| #define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) } |
| #define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) } |
| #define OPT_STRING_LIST(s, l, v, a, h) \ |
| { OPTION_CALLBACK, (s), (l), (v), (a), \ |
| (h), 0, &parse_opt_string_list } |
| #define OPT_UYN(s, l, v, h) { OPTION_CALLBACK, (s), (l), (v), NULL, \ |
| (h), PARSE_OPT_NOARG, &parse_opt_tertiary } |
| #define OPT_DATE(s, l, v, h) \ |
| { OPTION_CALLBACK, (s), (l), (v), N_("time"),(h), 0, \ |
| parse_opt_approxidate_cb } |
| #define OPT_EXPIRY_DATE(s, l, v, h) \ |
| { OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0, \ |
| parse_opt_expiry_date_cb } |
| #define OPT_CALLBACK(s, l, v, a, h, f) \ |
| { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) } |
| #define OPT_NUMBER_CALLBACK(v, h, f) \ |
| { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \ |
| PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) } |
| #define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \ |
| N_("file"), (h) } |
| #define OPT_COLOR_FLAG(s, l, v, h) \ |
| { OPTION_CALLBACK, (s), (l), (v), N_("when"), (h), PARSE_OPT_OPTARG, \ |
| parse_opt_color_flag_cb, (intptr_t)"always" } |
| |
| #define OPT_NOOP_NOARG(s, l) \ |
| { OPTION_CALLBACK, (s), (l), NULL, NULL, \ |
| N_("no-op (backward compatibility)"), \ |
| PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb } |
| |
| /* parse_options() will filter out the processed options and leave the |
| * non-option arguments in argv[]. usagestr strings should be marked |
| * for translation with N_(). |
| * Returns the number of arguments left in argv[]. |
| */ |
| extern int parse_options(int argc, const char **argv, const char *prefix, |
| const struct option *options, |
| const char * const usagestr[], int flags); |
| |
| extern NORETURN void usage_with_options(const char * const *usagestr, |
| const struct option *options); |
| |
| extern NORETURN void usage_msg_opt(const char *msg, |
| const char * const *usagestr, |
| const struct option *options); |
| |
| extern int optbug(const struct option *opt, const char *reason); |
| extern int opterror(const struct option *opt, const char *reason, int flags); |
| #if defined(__GNUC__) && ! defined(__clang__) |
| #define opterror(o,r,f) (opterror((o),(r),(f)), -1) |
| #endif |
| |
| /*----- incremental advanced APIs -----*/ |
| |
| enum { |
| PARSE_OPT_HELP = -1, |
| PARSE_OPT_DONE, |
| PARSE_OPT_NON_OPTION, |
| PARSE_OPT_UNKNOWN |
| }; |
| |
| /* |
| * It's okay for the caller to consume argv/argc in the usual way. |
| * Other fields of that structure are private to parse-options and should not |
| * be modified in any way. |
| */ |
| struct parse_opt_ctx_t { |
| const char **argv; |
| const char **out; |
| int argc, cpidx; |
| const char *opt; |
| int flags; |
| const char *prefix; |
| }; |
| |
| extern void parse_options_start(struct parse_opt_ctx_t *ctx, |
| int argc, const char **argv, const char *prefix, |
| const struct option *options, int flags); |
| |
| extern int parse_options_step(struct parse_opt_ctx_t *ctx, |
| const struct option *options, |
| const char * const usagestr[]); |
| |
| extern int parse_options_end(struct parse_opt_ctx_t *ctx); |
| |
| extern int parse_options_concat(struct option *dst, size_t, struct option *src); |
| |
| /*----- some often used options -----*/ |
| extern int parse_opt_abbrev_cb(const struct option *, const char *, int); |
| extern int parse_opt_approxidate_cb(const struct option *, const char *, int); |
| extern int parse_opt_expiry_date_cb(const struct option *, const char *, int); |
| extern int parse_opt_color_flag_cb(const struct option *, const char *, int); |
| extern int parse_opt_verbosity_cb(const struct option *, const char *, int); |
| extern int parse_opt_with_commit(const struct option *, const char *, int); |
| extern int parse_opt_tertiary(const struct option *, const char *, int); |
| extern int parse_opt_string_list(const struct option *, const char *, int); |
| extern int parse_opt_noop_cb(const struct option *, const char *, int); |
| |
| #define OPT__VERBOSE(var, h) OPT_COUNTUP('v', "verbose", (var), (h)) |
| #define OPT__QUIET(var, h) OPT_COUNTUP('q', "quiet", (var), (h)) |
| #define OPT__VERBOSITY(var) \ |
| { OPTION_CALLBACK, 'v', "verbose", (var), NULL, N_("be more verbose"), \ |
| PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \ |
| { OPTION_CALLBACK, 'q', "quiet", (var), NULL, N_("be more quiet"), \ |
| PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 } |
| #define OPT__DRY_RUN(var, h) OPT_BOOL('n', "dry-run", (var), (h)) |
| #define OPT__FORCE(var, h) OPT_COUNTUP('f', "force", (var), (h)) |
| #define OPT__ABBREV(var) \ |
| { OPTION_CALLBACK, 0, "abbrev", (var), N_("n"), \ |
| N_("use <n> digits to display SHA-1s"), \ |
| PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 } |
| #define OPT__COLOR(var, h) \ |
| OPT_COLOR_FLAG(0, "color", (var), (h)) |
| #define OPT_COLUMN(s, l, v, h) \ |
| { OPTION_CALLBACK, (s), (l), (v), N_("style"), (h), PARSE_OPT_OPTARG, parseopt_column_callback } |
| |
| #endif |