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4a59fd13 PH |
1 | #ifndef PARSE_OPTIONS_H |
2 | #define PARSE_OPTIONS_H | |
3 | ||
4 | enum parse_opt_type { | |
db7244bd | 5 | /* special types */ |
4a59fd13 | 6 | OPTION_END, |
580d5bff | 7 | OPTION_ARGUMENT, |
d7a38c54 | 8 | OPTION_GROUP, |
e0319ff5 | 9 | OPTION_NUMBER, |
db7244bd PH |
10 | /* options with no arguments */ |
11 | OPTION_BIT, | |
2f4b97f9 | 12 | OPTION_NEGBIT, |
db7244bd PH |
13 | OPTION_BOOLEAN, /* _INCR would have been a better name */ |
14 | OPTION_SET_INT, | |
15 | OPTION_SET_PTR, | |
16 | /* options with arguments (usually) */ | |
4a59fd13 PH |
17 | OPTION_STRING, |
18 | OPTION_INTEGER, | |
ffe659f9 | 19 | OPTION_CALLBACK, |
df217ed6 | 20 | OPTION_FILENAME |
4a59fd13 PH |
21 | }; |
22 | ||
23 | enum parse_opt_flags { | |
24 | PARSE_OPT_KEEP_DASHDASH = 1, | |
a0ec9d25 | 25 | PARSE_OPT_STOP_AT_NON_OPTION = 2, |
a32a4eaa | 26 | PARSE_OPT_KEEP_ARGV0 = 4, |
b5ce3a54 | 27 | PARSE_OPT_KEEP_UNKNOWN = 8, |
b92891f9 | 28 | PARSE_OPT_NO_INTERNAL_HELP = 16, |
4a59fd13 PH |
29 | }; |
30 | ||
ffe659f9 PH |
31 | enum parse_opt_option_flags { |
32 | PARSE_OPT_OPTARG = 1, | |
f481e22a | 33 | PARSE_OPT_NOARG = 2, |
db7244bd | 34 | PARSE_OPT_NONEG = 4, |
dd3bf0f4 | 35 | PARSE_OPT_HIDDEN = 8, |
1cc6985c | 36 | PARSE_OPT_LASTARG_DEFAULT = 16, |
51a9949e | 37 | PARSE_OPT_NODASH = 32, |
29f25d49 | 38 | PARSE_OPT_LITERAL_ARGHELP = 64, |
ffe659f9 PH |
39 | }; |
40 | ||
41 | struct option; | |
42 | typedef int parse_opt_cb(const struct option *, const char *arg, int unset); | |
43 | ||
9b3beb58 PH |
44 | /* |
45 | * `type`:: | |
46 | * holds the type of the option, you must have an OPTION_END last in your | |
47 | * array. | |
48 | * | |
49 | * `short_name`:: | |
50 | * the character to use as a short option name, '\0' if none. | |
51 | * | |
52 | * `long_name`:: | |
53 | * the long option name, without the leading dashes, NULL if none. | |
54 | * | |
55 | * `value`:: | |
56 | * stores pointers to the values to be filled. | |
57 | * | |
58 | * `argh`:: | |
59 | * token to explain the kind of argument this option wants. Keep it | |
3ea3c215 | 60 | * homogeneous across the repository. |
9b3beb58 PH |
61 | * |
62 | * `help`:: | |
63 | * the short help associated to what the option does. | |
64 | * Must never be NULL (except for OPTION_END). | |
65 | * OPTION_GROUP uses this pointer to store the group header. | |
66 | * | |
67 | * `flags`:: | |
68 | * mask of parse_opt_option_flags. | |
3ea3c215 | 69 | * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs) |
9b3beb58 | 70 | * PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs |
db7244bd | 71 | * PARSE_OPT_NONEG: says that this option cannot be negated |
51a9949e RS |
72 | * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and |
73 | * shown only in the full usage. | |
74 | * PARSE_OPT_LASTARG_DEFAULT: if no argument is given, the default value | |
75 | * is used. | |
76 | * PARSE_OPT_NODASH: this option doesn't start with a dash. | |
29f25d49 SB |
77 | * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets |
78 | * (i.e. '<argh>') in the help message. | |
79 | * Useful for options with multiple parameters. | |
9b3beb58 PH |
80 | * |
81 | * `callback`:: | |
82 | * pointer to the callback to use for OPTION_CALLBACK. | |
83 | * | |
84 | * `defval`:: | |
85 | * default value to fill (*->value) with for PARSE_OPT_OPTARG. | |
db7244bd PH |
86 | * OPTION_{BIT,SET_INT,SET_PTR} store the {mask,integer,pointer} to put in |
87 | * the value when met. | |
9b3beb58 PH |
88 | * CALLBACKS can use it like they want. |
89 | */ | |
4a59fd13 PH |
90 | struct option { |
91 | enum parse_opt_type type; | |
92 | int short_name; | |
93 | const char *long_name; | |
94 | void *value; | |
d7a38c54 PH |
95 | const char *argh; |
96 | const char *help; | |
ffe659f9 PH |
97 | |
98 | int flags; | |
99 | parse_opt_cb *callback; | |
ffe659f9 | 100 | intptr_t defval; |
4a59fd13 PH |
101 | }; |
102 | ||
103 | #define OPT_END() { OPTION_END } | |
580d5bff | 104 | #define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, (h) } |
d7a38c54 | 105 | #define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) } |
db7244bd | 106 | #define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), 0, NULL, (b) } |
2f4b97f9 | 107 | #define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, (h), 0, NULL, (b) } |
d7a38c54 | 108 | #define OPT_BOOLEAN(s, l, v, h) { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) } |
db7244bd PH |
109 | #define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, (h), 0, NULL, (i) } |
110 | #define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, (h), 0, NULL, (p) } | |
d7a38c54 PH |
111 | #define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), NULL, (h) } |
112 | #define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) } | |
1f4a711a MB |
113 | #define OPT_DATE(s, l, v, h) \ |
114 | { OPTION_CALLBACK, (s), (l), (v), "time",(h), 0, \ | |
115 | parse_opt_approxidate_cb } | |
ffe659f9 PH |
116 | #define OPT_CALLBACK(s, l, v, a, h, f) \ |
117 | { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) } | |
e0319ff5 RS |
118 | #define OPT_NUMBER_CALLBACK(v, h, f) \ |
119 | { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \ | |
120 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) } | |
df217ed6 SB |
121 | #define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \ |
122 | "FILE", (h) } | |
4a59fd13 PH |
123 | |
124 | /* parse_options() will filter out the processed options and leave the | |
3ea3c215 | 125 | * non-option arguments in argv[]. |
4a59fd13 PH |
126 | * Returns the number of arguments left in argv[]. |
127 | */ | |
37782920 | 128 | extern int parse_options(int argc, const char **argv, const char *prefix, |
4a59fd13 | 129 | const struct option *options, |
d7a38c54 PH |
130 | const char * const usagestr[], int flags); |
131 | ||
132 | extern NORETURN void usage_with_options(const char * const *usagestr, | |
133 | const struct option *options); | |
4a59fd13 | 134 | |
3ea3c215 | 135 | /*----- incremental advanced APIs -----*/ |
7e7bbcb4 | 136 | |
ee68b87a PH |
137 | enum { |
138 | PARSE_OPT_HELP = -1, | |
139 | PARSE_OPT_DONE, | |
140 | PARSE_OPT_UNKNOWN, | |
141 | }; | |
142 | ||
26141b5b PH |
143 | /* |
144 | * It's okay for the caller to consume argv/argc in the usual way. | |
145 | * Other fields of that structure are private to parse-options and should not | |
146 | * be modified in any way. | |
147 | */ | |
7e7bbcb4 PH |
148 | struct parse_opt_ctx_t { |
149 | const char **argv; | |
150 | const char **out; | |
151 | int argc, cpidx; | |
152 | const char *opt; | |
153 | int flags; | |
37782920 | 154 | const char *prefix; |
7e7bbcb4 PH |
155 | }; |
156 | ||
ee68b87a PH |
157 | extern int parse_options_usage(const char * const *usagestr, |
158 | const struct option *opts); | |
159 | ||
7e7bbcb4 | 160 | extern void parse_options_start(struct parse_opt_ctx_t *ctx, |
37782920 SB |
161 | int argc, const char **argv, const char *prefix, |
162 | int flags); | |
7e7bbcb4 | 163 | |
ff43ec3e PH |
164 | extern int parse_options_step(struct parse_opt_ctx_t *ctx, |
165 | const struct option *options, | |
166 | const char * const usagestr[]); | |
167 | ||
7e7bbcb4 PH |
168 | extern int parse_options_end(struct parse_opt_ctx_t *ctx); |
169 | ||
170 | ||
0ce865b1 PH |
171 | /*----- some often used options -----*/ |
172 | extern int parse_opt_abbrev_cb(const struct option *, const char *, int); | |
1f4a711a | 173 | extern int parse_opt_approxidate_cb(const struct option *, const char *, int); |
7f87aff2 | 174 | extern int parse_opt_verbosity_cb(const struct option *, const char *, int); |
269defdf | 175 | extern int parse_opt_with_commit(const struct option *, const char *, int); |
0ce865b1 PH |
176 | |
177 | #define OPT__VERBOSE(var) OPT_BOOLEAN('v', "verbose", (var), "be verbose") | |
178 | #define OPT__QUIET(var) OPT_BOOLEAN('q', "quiet", (var), "be quiet") | |
7f87aff2 TA |
179 | #define OPT__VERBOSITY(var) \ |
180 | { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \ | |
181 | PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \ | |
182 | { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \ | |
183 | PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 } | |
0ce865b1 PH |
184 | #define OPT__DRY_RUN(var) OPT_BOOLEAN('n', "dry-run", (var), "dry run") |
185 | #define OPT__ABBREV(var) \ | |
186 | { OPTION_CALLBACK, 0, "abbrev", (var), "n", \ | |
187 | "use <n> digits to display SHA-1s", \ | |
188 | PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 } | |
189 | ||
4a59fd13 | 190 | #endif |