diff options
Diffstat (limited to 'third_party/git/parse-options.h')
| -rw-r--r-- | third_party/git/parse-options.h | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/third_party/git/parse-options.h b/third_party/git/parse-options.h new file mode 100644 index 0000000000..a4bd40bb6a --- /dev/null +++ b/third_party/git/parse-options.h @@ -0,0 +1,334 @@ +#ifndef PARSE_OPTIONS_H +#define PARSE_OPTIONS_H + +enum parse_opt_type { + /* special types */ + OPTION_END, + OPTION_ARGUMENT, + OPTION_GROUP, + OPTION_NUMBER, + OPTION_ALIAS, + /* options with no arguments */ + OPTION_BIT, + OPTION_NEGBIT, + OPTION_BITOP, + OPTION_COUNTUP, + OPTION_SET_INT, + OPTION_CMDMODE, + /* options with arguments (usually) */ + OPTION_STRING, + OPTION_INTEGER, + OPTION_MAGNITUDE, + 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, + PARSE_OPT_ONE_SHOT = 32 +}; + +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, + PARSE_OPT_NOCOMPLETE = 512, + PARSE_OPT_COMP_ARG = 1024 +}; + +struct option; +typedef int parse_opt_cb(const struct option *, const char *arg, int unset); + +struct parse_opt_ctx_t; +typedef enum parse_opt_result parse_opt_ll_cb(struct parse_opt_ctx_t *ctx, + const struct option *opt, + const char *arg, 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. + * PARSE_OPT_NOCOMPLETE: by default all visible options are completable + * by git-completion.bash. This option suppresses that. + * PARSE_OPT_COMP_ARG: this option forces to git-completion.bash to + * complete an option as --name= not --name even if + * the option takes optional argument. + * + * `callback`:: + * pointer to the callback to use for OPTION_CALLBACK + * + * `defval`:: + * default value to fill (*->value) with for PARSE_OPT_OPTARG. + * OPTION_{BIT,SET_INT} store the {mask,integer} to put in the value when met. + * CALLBACKS can use it like they want. + * + * `ll_callback`:: + * pointer to the callback to use for OPTION_LOWLEVEL_CALLBACK + * + */ +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; + parse_opt_ll_cb *ll_callback; + intptr_t extra; +}; + +#define OPT_BIT_F(s, l, v, h, b, f) { OPTION_BIT, (s), (l), (v), NULL, (h), \ + PARSE_OPT_NOARG|(f), NULL, (b) } +#define OPT_COUNTUP_F(s, l, v, h, f) { OPTION_COUNTUP, (s), (l), (v), NULL, \ + (h), PARSE_OPT_NOARG|(f) } +#define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \ + (h), PARSE_OPT_NOARG | (f), NULL, (i) } +#define OPT_BOOL_F(s, l, v, h, f) OPT_SET_INT_F(s, l, v, h, 1, f) +#define OPT_CALLBACK_F(s, l, v, a, h, f, cb) \ + { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), (cb) } +#define OPT_STRING_F(s, l, v, a, h, f) { OPTION_STRING, (s), (l), (v), (a), (h), (f) } +#define OPT_INTEGER_F(s, l, v, h, f) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h), (f) } + +#define OPT_END() { OPTION_END } +#define OPT_ARGUMENT(l, v, h) { OPTION_ARGUMENT, 0, (l), (v), NULL, \ + (h), PARSE_OPT_NOARG, NULL, 1 } +#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) } +#define OPT_BIT(s, l, v, h, b) OPT_BIT_F(s, l, v, h, b, 0) +#define OPT_BITOP(s, l, v, h, set, clear) { OPTION_BITOP, (s), (l), (v), NULL, (h), \ + PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, \ + (set), NULL, (clear) } +#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) OPT_COUNTUP_F(s, l, v, h, 0) +#define OPT_SET_INT(s, l, v, h, i) OPT_SET_INT_F(s, l, v, h, i, 0) +#define OPT_BOOL(s, l, v, h) OPT_BOOL_F(s, l, v, h, 0) +#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) OPT_INTEGER_F(s, l, v, h, 0) +#define OPT_MAGNITUDE(s, l, v, h) { OPTION_MAGNITUDE, (s), (l), (v), \ + N_("n"), (h), PARSE_OPT_NONEG } +#define OPT_STRING(s, l, v, a, h) OPT_STRING_F(s, l, v, a, h, 0) +#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_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) OPT_CALLBACK_F(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 } + +#define OPT_ALIAS(s, l, source_long_name) \ + { OPTION_ALIAS, (s), (l), (source_long_name) } + +/* + * parse_options() will filter out the processed options and leave the + * non-option arguments in argv[]. argv0 is assumed program name and + * skipped. + * + * usagestr strings should be marked for translation with N_(). + * + * Returns the number of arguments left in argv[]. + * + * In one-shot mode, argv0 is not a program name, argv[] is left + * untouched and parse_options() returns the number of options + * processed. + */ +int parse_options(int argc, const char **argv, const char *prefix, + const struct option *options, + const char * const usagestr[], int flags); + +NORETURN void usage_with_options(const char * const *usagestr, + const struct option *options); + +NORETURN void usage_msg_opt(const char *msg, + const char * const *usagestr, + const struct option *options); + +int optbug(const struct option *opt, const char *reason); +const char *optname(const struct option *opt, int flags); + +/* + * Use these assertions for callbacks that expect to be called with NONEG and + * NOARG respectively, and do not otherwise handle the "unset" and "arg" + * parameters. + */ +#define BUG_ON_OPT_NEG(unset) do { \ + if ((unset)) \ + BUG("option callback does not expect negation"); \ +} while (0) +#define BUG_ON_OPT_ARG(arg) do { \ + if ((arg)) \ + BUG("option callback does not expect an argument"); \ +} while (0) + +/* + * Similar to the assertions above, but checks that "arg" is always non-NULL. + * This assertion also implies BUG_ON_OPT_NEG(), letting you declare both + * assertions in a single line. + */ +#define BUG_ON_OPT_NEG_NOARG(unset, arg) do { \ + BUG_ON_OPT_NEG(unset); \ + if(!(arg)) \ + BUG("option callback expects an argument"); \ +} while(0) + +/*----- incremental advanced APIs -----*/ + +enum parse_opt_result { + PARSE_OPT_COMPLETE = -3, + PARSE_OPT_HELP = -2, + PARSE_OPT_ERROR = -1, /* must be the same as error() */ + PARSE_OPT_DONE = 0, /* fixed so that "return 0" works */ + 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, total; + const char *opt; + int flags; + const char *prefix; + const char **alias_groups; /* must be in groups of 3 elements! */ + struct option *updated_options; +}; + +void parse_options_start(struct parse_opt_ctx_t *ctx, + int argc, const char **argv, const char *prefix, + const struct option *options, int flags); + +int parse_options_step(struct parse_opt_ctx_t *ctx, + const struct option *options, + const char * const usagestr[]); + +int parse_options_end(struct parse_opt_ctx_t *ctx); + +struct option *parse_options_dup(const struct option *a); +struct option *parse_options_concat(struct option *a, struct option *b); + +/*----- some often used options -----*/ +int parse_opt_abbrev_cb(const struct option *, const char *, int); +int parse_opt_expiry_date_cb(const struct option *, const char *, int); +int parse_opt_color_flag_cb(const struct option *, const char *, int); +int parse_opt_verbosity_cb(const struct option *, const char *, int); +/* value is struct oid_array* */ +int parse_opt_object_name(const struct option *, const char *, int); +/* value is struct object_id* */ +int parse_opt_object_id(const struct option *, const char *, int); +int parse_opt_commits(const struct option *, const char *, int); +int parse_opt_commit(const struct option *, const char *, int); +int parse_opt_tertiary(const struct option *, const char *, int); +int parse_opt_string_list(const struct option *, const char *, int); +int parse_opt_noop_cb(const struct option *, const char *, int); +enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx, + const struct option *, + const char *, int); +int parse_opt_passthru(const struct option *, const char *, int); +int parse_opt_passthru_argv(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, f) OPT_COUNTUP_F('f', "force", (var), (h), (f)) +#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 } +#define OPT_PASSTHRU(s, l, v, a, h, f) \ + { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru } +#define OPT_PASSTHRU_ARGV(s, l, v, a, h, f) \ + { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru_argv } +#define _OPT_CONTAINS_OR_WITH(name, variable, help, flag) \ + { OPTION_CALLBACK, 0, name, (variable), N_("commit"), (help), \ + PARSE_OPT_LASTARG_DEFAULT | flag, \ + parse_opt_commits, (intptr_t) "HEAD" \ + } +#define OPT_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("contains", v, h, PARSE_OPT_NONEG) +#define OPT_NO_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("no-contains", v, h, PARSE_OPT_NONEG) +#define OPT_WITH(v, h) _OPT_CONTAINS_OR_WITH("with", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG) +#define OPT_WITHOUT(v, h) _OPT_CONTAINS_OR_WITH("without", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG) +#define OPT_CLEANUP(v) OPT_STRING(0, "cleanup", v, N_("mode"), N_("how to strip spaces and #comments from message")) + +#endif |