1 #ifndef PARSE_OPTIONS_H
2 #define PARSE_OPTIONS_H
9 /* options with no arguments */
11 OPTION_BOOLEAN, /* _INCR would have been a better name */
14 /* options with arguments (usually) */
20 enum parse_opt_flags {
21 PARSE_OPT_KEEP_DASHDASH = 1,
22 PARSE_OPT_STOP_AT_NON_OPTION = 2,
25 enum parse_opt_option_flags {
33 typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
37 * holds the type of the option, you must have an OPTION_END last in your
41 * the character to use as a short option name, '\0' if none.
44 * the long option name, without the leading dashes, NULL if none.
47 * stores pointers to the values to be filled.
50 * token to explain the kind of argument this option wants. Keep it
51 * homogenous across the repository.
54 * the short help associated to what the option does.
55 * Must never be NULL (except for OPTION_END).
56 * OPTION_GROUP uses this pointer to store the group header.
59 * mask of parse_opt_option_flags.
60 * PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
61 * PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
62 * PARSE_OPT_NONEG: says that this option cannot be negated
63 * PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
67 * pointer to the callback to use for OPTION_CALLBACK.
70 * default value to fill (*->value) with for PARSE_OPT_OPTARG.
71 * OPTION_{BIT,SET_INT,SET_PTR} store the {mask,integer,pointer} to put in
73 * CALLBACKS can use it like they want.
76 enum parse_opt_type type;
78 const char *long_name;
84 parse_opt_cb *callback;
88 #define OPT_END() { OPTION_END }
89 #define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, (h) }
90 #define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
91 #define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), 0, NULL, (b) }
92 #define OPT_BOOLEAN(s, l, v, h) { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) }
93 #define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, (h), 0, NULL, (i) }
94 #define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, (h), 0, NULL, (p) }
95 #define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), NULL, (h) }
96 #define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
97 #define OPT_DATE(s, l, v, h) \
98 { OPTION_CALLBACK, (s), (l), (v), "time",(h), 0, \
99 parse_opt_approxidate_cb }
100 #define OPT_CALLBACK(s, l, v, a, h, f) \
101 { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
103 /* parse_options() will filter out the processed options and leave the
104 * non-option argments in argv[].
105 * Returns the number of arguments left in argv[].
107 extern int parse_options(int argc, const char **argv,
108 const struct option *options,
109 const char * const usagestr[], int flags);
111 extern NORETURN void usage_with_options(const char * const *usagestr,
112 const struct option *options);
114 /*----- some often used options -----*/
115 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
116 extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
118 #define OPT__VERBOSE(var) OPT_BOOLEAN('v', "verbose", (var), "be verbose")
119 #define OPT__QUIET(var) OPT_BOOLEAN('q', "quiet", (var), "be quiet")
120 #define OPT__DRY_RUN(var) OPT_BOOLEAN('n', "dry-run", (var), "dry run")
121 #define OPT__ABBREV(var) \
122 { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
123 "use <n> digits to display SHA-1s", \
124 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }