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1 | #ifndef PARSE_OPTIONS_H | |
2 | #define PARSE_OPTIONS_H | |
3 | ||
4 | enum parse_opt_type { | |
5 | /* special types */ | |
6 | OPTION_END, | |
7 | OPTION_ARGUMENT, | |
8 | OPTION_GROUP, | |
9 | OPTION_NUMBER, | |
10 | /* options with no arguments */ | |
11 | OPTION_BIT, | |
12 | OPTION_NEGBIT, | |
13 | OPTION_COUNTUP, | |
14 | OPTION_SET_INT, | |
15 | OPTION_CMDMODE, | |
16 | /* options with arguments (usually) */ | |
17 | OPTION_STRING, | |
18 | OPTION_INTEGER, | |
19 | OPTION_MAGNITUDE, | |
20 | OPTION_CALLBACK, | |
21 | OPTION_LOWLEVEL_CALLBACK, | |
22 | OPTION_FILENAME | |
23 | }; | |
24 | ||
25 | enum parse_opt_flags { | |
26 | PARSE_OPT_KEEP_DASHDASH = 1, | |
27 | PARSE_OPT_STOP_AT_NON_OPTION = 2, | |
28 | PARSE_OPT_KEEP_ARGV0 = 4, | |
29 | PARSE_OPT_KEEP_UNKNOWN = 8, | |
30 | PARSE_OPT_NO_INTERNAL_HELP = 16 | |
31 | }; | |
32 | ||
33 | enum parse_opt_option_flags { | |
34 | PARSE_OPT_OPTARG = 1, | |
35 | PARSE_OPT_NOARG = 2, | |
36 | PARSE_OPT_NONEG = 4, | |
37 | PARSE_OPT_HIDDEN = 8, | |
38 | PARSE_OPT_LASTARG_DEFAULT = 16, | |
39 | PARSE_OPT_NODASH = 32, | |
40 | PARSE_OPT_LITERAL_ARGHELP = 64, | |
41 | PARSE_OPT_SHELL_EVAL = 256, | |
42 | PARSE_OPT_NOCOMPLETE = 512, | |
43 | PARSE_OPT_COMP_ARG = 1024 | |
44 | }; | |
45 | ||
46 | struct option; | |
47 | typedef int parse_opt_cb(const struct option *, const char *arg, int unset); | |
48 | ||
49 | struct parse_opt_ctx_t; | |
50 | typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx, | |
51 | const struct option *opt, int unset); | |
52 | ||
53 | /* | |
54 | * `type`:: | |
55 | * holds the type of the option, you must have an OPTION_END last in your | |
56 | * array. | |
57 | * | |
58 | * `short_name`:: | |
59 | * the character to use as a short option name, '\0' if none. | |
60 | * | |
61 | * `long_name`:: | |
62 | * the long option name, without the leading dashes, NULL if none. | |
63 | * | |
64 | * `value`:: | |
65 | * stores pointers to the values to be filled. | |
66 | * | |
67 | * `argh`:: | |
68 | * token to explain the kind of argument this option wants. Keep it | |
69 | * homogeneous across the repository. Should be wrapped by N_() for | |
70 | * translation. | |
71 | * | |
72 | * `help`:: | |
73 | * the short help associated to what the option does. | |
74 | * Must never be NULL (except for OPTION_END). | |
75 | * OPTION_GROUP uses this pointer to store the group header. | |
76 | * Should be wrapped by N_() for translation. | |
77 | * | |
78 | * `flags`:: | |
79 | * mask of parse_opt_option_flags. | |
80 | * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs) | |
81 | * PARSE_OPT_NOARG: says that this option does not take an argument | |
82 | * PARSE_OPT_NONEG: says that this option cannot be negated | |
83 | * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and | |
84 | * shown only in the full usage. | |
85 | * PARSE_OPT_LASTARG_DEFAULT: says that this option will take the default | |
86 | * value if no argument is given when the option | |
87 | * is last on the command line. If the option is | |
88 | * not last it will require an argument. | |
89 | * Should not be used with PARSE_OPT_OPTARG. | |
90 | * PARSE_OPT_NODASH: this option doesn't start with a dash. | |
91 | * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets | |
92 | * (i.e. '<argh>') in the help message. | |
93 | * Useful for options with multiple parameters. | |
94 | * PARSE_OPT_NOCOMPLETE: by default all visible options are completable | |
95 | * by git-completion.bash. This option suppresses that. | |
96 | * PARSE_OPT_COMP_ARG: this option forces to git-completion.bash to | |
97 | * complete an option as --name= not --name even if | |
98 | * the option takes optional argument. | |
99 | * | |
100 | * `callback`:: | |
101 | * pointer to the callback to use for OPTION_CALLBACK or | |
102 | * OPTION_LOWLEVEL_CALLBACK. | |
103 | * | |
104 | * `defval`:: | |
105 | * default value to fill (*->value) with for PARSE_OPT_OPTARG. | |
106 | * OPTION_{BIT,SET_INT} store the {mask,integer} to put in the value when met. | |
107 | * CALLBACKS can use it like they want. | |
108 | */ | |
109 | struct option { | |
110 | enum parse_opt_type type; | |
111 | int short_name; | |
112 | const char *long_name; | |
113 | void *value; | |
114 | const char *argh; | |
115 | const char *help; | |
116 | ||
117 | int flags; | |
118 | parse_opt_cb *callback; | |
119 | intptr_t defval; | |
120 | }; | |
121 | ||
122 | #define OPT_BIT_F(s, l, v, h, b, f) { OPTION_BIT, (s), (l), (v), NULL, (h), \ | |
123 | PARSE_OPT_NOARG|(f), NULL, (b) } | |
124 | #define OPT_COUNTUP_F(s, l, v, h, f) { OPTION_COUNTUP, (s), (l), (v), NULL, \ | |
125 | (h), PARSE_OPT_NOARG|(f) } | |
126 | #define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \ | |
127 | (h), PARSE_OPT_NOARG | (f), NULL, (i) } | |
128 | #define OPT_BOOL_F(s, l, v, h, f) OPT_SET_INT_F(s, l, v, h, 1, f) | |
129 | ||
130 | #define OPT_END() { OPTION_END } | |
131 | #define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \ | |
132 | (h), PARSE_OPT_NOARG} | |
133 | #define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) } | |
134 | #define OPT_BIT(s, l, v, h, b) OPT_BIT_F(s, l, v, h, b, 0) | |
135 | #define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \ | |
136 | (h), PARSE_OPT_NOARG, NULL, (b) } | |
137 | #define OPT_COUNTUP(s, l, v, h) OPT_COUNTUP_F(s, l, v, h, 0) | |
138 | #define OPT_SET_INT(s, l, v, h, i) OPT_SET_INT_F(s, l, v, h, i, 0) | |
139 | #define OPT_BOOL(s, l, v, h) OPT_BOOL_F(s, l, v, h, 0) | |
140 | #define OPT_HIDDEN_BOOL(s, l, v, h) { OPTION_SET_INT, (s), (l), (v), NULL, \ | |
141 | (h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1} | |
142 | #define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \ | |
143 | (h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) } | |
144 | #define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) } | |
145 | #define OPT_MAGNITUDE(s, l, v, h) { OPTION_MAGNITUDE, (s), (l), (v), \ | |
146 | N_("n"), (h), PARSE_OPT_NONEG } | |
147 | #define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) } | |
148 | #define OPT_STRING_LIST(s, l, v, a, h) \ | |
149 | { OPTION_CALLBACK, (s), (l), (v), (a), \ | |
150 | (h), 0, &parse_opt_string_list } | |
151 | #define OPT_UYN(s, l, v, h) { OPTION_CALLBACK, (s), (l), (v), NULL, \ | |
152 | (h), PARSE_OPT_NOARG, &parse_opt_tertiary } | |
153 | #define OPT_EXPIRY_DATE(s, l, v, h) \ | |
154 | { OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0, \ | |
155 | parse_opt_expiry_date_cb } | |
156 | #define OPT_CALLBACK(s, l, v, a, h, f) \ | |
157 | { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) } | |
158 | #define OPT_NUMBER_CALLBACK(v, h, f) \ | |
159 | { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \ | |
160 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) } | |
161 | #define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \ | |
162 | N_("file"), (h) } | |
163 | #define OPT_COLOR_FLAG(s, l, v, h) \ | |
164 | { OPTION_CALLBACK, (s), (l), (v), N_("when"), (h), PARSE_OPT_OPTARG, \ | |
165 | parse_opt_color_flag_cb, (intptr_t)"always" } | |
166 | ||
167 | #define OPT_NOOP_NOARG(s, l) \ | |
168 | { OPTION_CALLBACK, (s), (l), NULL, NULL, \ | |
169 | N_("no-op (backward compatibility)"), \ | |
170 | PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb } | |
171 | ||
172 | /* parse_options() will filter out the processed options and leave the | |
173 | * non-option arguments in argv[]. usagestr strings should be marked | |
174 | * for translation with N_(). | |
175 | * Returns the number of arguments left in argv[]. | |
176 | */ | |
177 | extern int parse_options(int argc, const char **argv, const char *prefix, | |
178 | const struct option *options, | |
179 | const char * const usagestr[], int flags); | |
180 | ||
181 | extern NORETURN void usage_with_options(const char * const *usagestr, | |
182 | const struct option *options); | |
183 | ||
184 | extern NORETURN void usage_msg_opt(const char *msg, | |
185 | const char * const *usagestr, | |
186 | const struct option *options); | |
187 | ||
188 | extern int optbug(const struct option *opt, const char *reason); | |
189 | const char *optname(const struct option *opt, int flags); | |
190 | ||
191 | /* | |
192 | * Use these assertions for callbacks that expect to be called with NONEG and | |
193 | * NOARG respectively, and do not otherwise handle the "unset" and "arg" | |
194 | * parameters. | |
195 | */ | |
196 | #define BUG_ON_OPT_NEG(unset) do { \ | |
197 | if ((unset)) \ | |
198 | BUG("option callback does not expect negation"); \ | |
199 | } while (0) | |
200 | #define BUG_ON_OPT_ARG(arg) do { \ | |
201 | if ((arg)) \ | |
202 | BUG("option callback does not expect an argument"); \ | |
203 | } while (0) | |
204 | ||
205 | /*----- incremental advanced APIs -----*/ | |
206 | ||
207 | enum { | |
208 | PARSE_OPT_COMPLETE = -2, | |
209 | PARSE_OPT_HELP = -1, | |
210 | PARSE_OPT_DONE, | |
211 | PARSE_OPT_NON_OPTION, | |
212 | PARSE_OPT_ERROR, | |
213 | PARSE_OPT_UNKNOWN | |
214 | }; | |
215 | ||
216 | /* | |
217 | * It's okay for the caller to consume argv/argc in the usual way. | |
218 | * Other fields of that structure are private to parse-options and should not | |
219 | * be modified in any way. | |
220 | */ | |
221 | struct parse_opt_ctx_t { | |
222 | const char **argv; | |
223 | const char **out; | |
224 | int argc, cpidx, total; | |
225 | const char *opt; | |
226 | int flags; | |
227 | const char *prefix; | |
228 | }; | |
229 | ||
230 | extern void parse_options_start(struct parse_opt_ctx_t *ctx, | |
231 | int argc, const char **argv, const char *prefix, | |
232 | const struct option *options, int flags); | |
233 | ||
234 | extern int parse_options_step(struct parse_opt_ctx_t *ctx, | |
235 | const struct option *options, | |
236 | const char * const usagestr[]); | |
237 | ||
238 | extern int parse_options_end(struct parse_opt_ctx_t *ctx); | |
239 | ||
240 | extern struct option *parse_options_concat(struct option *a, struct option *b); | |
241 | ||
242 | /*----- some often used options -----*/ | |
243 | extern int parse_opt_abbrev_cb(const struct option *, const char *, int); | |
244 | extern int parse_opt_expiry_date_cb(const struct option *, const char *, int); | |
245 | extern int parse_opt_color_flag_cb(const struct option *, const char *, int); | |
246 | extern int parse_opt_verbosity_cb(const struct option *, const char *, int); | |
247 | extern int parse_opt_object_name(const struct option *, const char *, int); | |
248 | extern int parse_opt_commits(const struct option *, const char *, int); | |
249 | extern int parse_opt_tertiary(const struct option *, const char *, int); | |
250 | extern int parse_opt_string_list(const struct option *, const char *, int); | |
251 | extern int parse_opt_noop_cb(const struct option *, const char *, int); | |
252 | extern int parse_opt_unknown_cb(const struct option *, const char *, int); | |
253 | extern int parse_opt_passthru(const struct option *, const char *, int); | |
254 | extern int parse_opt_passthru_argv(const struct option *, const char *, int); | |
255 | ||
256 | #define OPT__VERBOSE(var, h) OPT_COUNTUP('v', "verbose", (var), (h)) | |
257 | #define OPT__QUIET(var, h) OPT_COUNTUP('q', "quiet", (var), (h)) | |
258 | #define OPT__VERBOSITY(var) \ | |
259 | { OPTION_CALLBACK, 'v', "verbose", (var), NULL, N_("be more verbose"), \ | |
260 | PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \ | |
261 | { OPTION_CALLBACK, 'q', "quiet", (var), NULL, N_("be more quiet"), \ | |
262 | PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 } | |
263 | #define OPT__DRY_RUN(var, h) OPT_BOOL('n', "dry-run", (var), (h)) | |
264 | #define OPT__FORCE(var, h, f) OPT_COUNTUP_F('f', "force", (var), (h), (f)) | |
265 | #define OPT__ABBREV(var) \ | |
266 | { OPTION_CALLBACK, 0, "abbrev", (var), N_("n"), \ | |
267 | N_("use <n> digits to display SHA-1s"), \ | |
268 | PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 } | |
269 | #define OPT__COLOR(var, h) \ | |
270 | OPT_COLOR_FLAG(0, "color", (var), (h)) | |
271 | #define OPT_COLUMN(s, l, v, h) \ | |
272 | { OPTION_CALLBACK, (s), (l), (v), N_("style"), (h), PARSE_OPT_OPTARG, parseopt_column_callback } | |
273 | #define OPT_PASSTHRU(s, l, v, a, h, f) \ | |
274 | { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru } | |
275 | #define OPT_PASSTHRU_ARGV(s, l, v, a, h, f) \ | |
276 | { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru_argv } | |
277 | #define _OPT_CONTAINS_OR_WITH(name, variable, help, flag) \ | |
278 | { OPTION_CALLBACK, 0, name, (variable), N_("commit"), (help), \ | |
279 | PARSE_OPT_LASTARG_DEFAULT | flag, \ | |
280 | parse_opt_commits, (intptr_t) "HEAD" \ | |
281 | } | |
282 | #define OPT_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("contains", v, h, PARSE_OPT_NONEG) | |
283 | #define OPT_NO_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("no-contains", v, h, PARSE_OPT_NONEG) | |
284 | #define OPT_WITH(v, h) _OPT_CONTAINS_OR_WITH("with", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG) | |
285 | #define OPT_WITHOUT(v, h) _OPT_CONTAINS_OR_WITH("without", v, h, PARSE_OPT_HIDDEN | PARSE_OPT_NONEG) | |
286 | ||
287 | #endif |