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1#ifndef PARSE_OPTIONS_H
2#define PARSE_OPTIONS_H
3
4enum parse_opt_type {
db7244bd 5 /* special types */
4a59fd13 6 OPTION_END,
580d5bff 7 OPTION_ARGUMENT,
d7a38c54 8 OPTION_GROUP,
e0319ff5 9 OPTION_NUMBER,
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10 /* options with no arguments */
11 OPTION_BIT,
2f4b97f9 12 OPTION_NEGBIT,
b04ba2bb 13 OPTION_COUNTUP,
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14 OPTION_SET_INT,
15 OPTION_SET_PTR,
16 /* options with arguments (usually) */
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17 OPTION_STRING,
18 OPTION_INTEGER,
ffe659f9 19 OPTION_CALLBACK,
b0b3a8b6 20 OPTION_LOWLEVEL_CALLBACK,
df217ed6 21 OPTION_FILENAME
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22};
23
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24/* Deprecated synonym */
25#define OPTION_BOOLEAN OPTION_COUNTUP
26
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27enum parse_opt_flags {
28 PARSE_OPT_KEEP_DASHDASH = 1,
a0ec9d25 29 PARSE_OPT_STOP_AT_NON_OPTION = 2,
a32a4eaa 30 PARSE_OPT_KEEP_ARGV0 = 4,
b5ce3a54 31 PARSE_OPT_KEEP_UNKNOWN = 8,
4b05548f 32 PARSE_OPT_NO_INTERNAL_HELP = 16
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33};
34
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35enum parse_opt_option_flags {
36 PARSE_OPT_OPTARG = 1,
f481e22a 37 PARSE_OPT_NOARG = 2,
db7244bd 38 PARSE_OPT_NONEG = 4,
dd3bf0f4 39 PARSE_OPT_HIDDEN = 8,
1cc6985c 40 PARSE_OPT_LASTARG_DEFAULT = 16,
51a9949e 41 PARSE_OPT_NODASH = 32,
29f25d49 42 PARSE_OPT_LITERAL_ARGHELP = 64,
47e9cd28 43 PARSE_OPT_SHELL_EVAL = 256
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44};
45
46struct option;
47typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
48
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49struct parse_opt_ctx_t;
50typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
51 const struct option *opt, int unset);
52
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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
3ea3c215 69 * homogeneous across the repository.
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70 *
71 * `help`::
72 * the short help associated to what the option does.
73 * Must never be NULL (except for OPTION_END).
74 * OPTION_GROUP uses this pointer to store the group header.
75 *
76 * `flags`::
77 * mask of parse_opt_option_flags.
3ea3c215 78 * PARSE_OPT_OPTARG: says that the argument is optional (not for BOOLEANs)
ef45e4da 79 * PARSE_OPT_NOARG: says that this option does not take an argument
db7244bd 80 * PARSE_OPT_NONEG: says that this option cannot be negated
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81 * PARSE_OPT_HIDDEN: this option is skipped in the default usage, and
82 * shown only in the full usage.
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83 * PARSE_OPT_LASTARG_DEFAULT: says that this option will take the default
84 * value if no argument is given when the option
85 * is last on the command line. If the option is
86 * not last it will require an argument.
87 * Should not be used with PARSE_OPT_OPTARG.
51a9949e 88 * PARSE_OPT_NODASH: this option doesn't start with a dash.
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89 * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
90 * (i.e. '<argh>') in the help message.
91 * Useful for options with multiple parameters.
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92 *
93 * `callback`::
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94 * pointer to the callback to use for OPTION_CALLBACK or
95 * OPTION_LOWLEVEL_CALLBACK.
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96 *
97 * `defval`::
98 * default value to fill (*->value) with for PARSE_OPT_OPTARG.
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99 * OPTION_{BIT,SET_INT,SET_PTR} store the {mask,integer,pointer} to put in
100 * the value when met.
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101 * CALLBACKS can use it like they want.
102 */
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103struct option {
104 enum parse_opt_type type;
105 int short_name;
106 const char *long_name;
107 void *value;
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108 const char *argh;
109 const char *help;
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110
111 int flags;
112 parse_opt_cb *callback;
ffe659f9 113 intptr_t defval;
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114};
115
116#define OPT_END() { OPTION_END }
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117#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
118 (h), PARSE_OPT_NOARG}
d7a38c54 119#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
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120#define OPT_BIT(s, l, v, h, b) { OPTION_BIT, (s), (l), (v), NULL, (h), \
121 PARSE_OPT_NOARG, NULL, (b) }
122#define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \
123 (h), PARSE_OPT_NOARG, NULL, (b) }
b04ba2bb 124#define OPT_COUNTUP(s, l, v, h) { OPTION_COUNTUP, (s), (l), (v), NULL, \
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125 (h), PARSE_OPT_NOARG }
126#define OPT_SET_INT(s, l, v, h, i) { OPTION_SET_INT, (s), (l), (v), NULL, \
127 (h), PARSE_OPT_NOARG, NULL, (i) }
b04ba2bb 128#define OPT_BOOL(s, l, v, h) OPT_SET_INT(s, l, v, h, 1)
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129#define OPT_SET_PTR(s, l, v, h, p) { OPTION_SET_PTR, (s), (l), (v), NULL, \
130 (h), PARSE_OPT_NOARG, NULL, (p) }
e3a0ca87 131#define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), "n", (h) }
d7a38c54 132#define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
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133#define OPT_STRING_LIST(s, l, v, a, h) \
134 { OPTION_CALLBACK, (s), (l), (v), (a), \
135 (h), 0, &parse_opt_string_list }
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136#define OPT_UYN(s, l, v, h) { OPTION_CALLBACK, (s), (l), (v), NULL, \
137 (h), PARSE_OPT_NOARG, &parse_opt_tertiary }
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138#define OPT_DATE(s, l, v, h) \
139 { OPTION_CALLBACK, (s), (l), (v), "time",(h), 0, \
140 parse_opt_approxidate_cb }
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141#define OPT_CALLBACK(s, l, v, a, h, f) \
142 { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
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143#define OPT_NUMBER_CALLBACK(v, h, f) \
144 { OPTION_NUMBER, 0, NULL, (v), NULL, (h), \
145 PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }
df217ed6 146#define OPT_FILENAME(s, l, v, h) { OPTION_FILENAME, (s), (l), (v), \
1d5006ab 147 "file", (h) }
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148#define OPT_COLOR_FLAG(s, l, v, h) \
149 { OPTION_CALLBACK, (s), (l), (v), "when", (h), PARSE_OPT_OPTARG, \
150 parse_opt_color_flag_cb, (intptr_t)"always" }
151
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152#define OPT_NOOP_NOARG(s, l) \
153 { OPTION_CALLBACK, (s), (l), NULL, NULL, \
154 "no-op (backward compatibility)", \
155 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb }
156
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157/* Deprecated synonym */
158#define OPT_BOOLEAN OPT_COUNTUP
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159
160/* parse_options() will filter out the processed options and leave the
3ea3c215 161 * non-option arguments in argv[].
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162 * Returns the number of arguments left in argv[].
163 */
37782920 164extern int parse_options(int argc, const char **argv, const char *prefix,
4a59fd13 165 const struct option *options,
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166 const char * const usagestr[], int flags);
167
168extern NORETURN void usage_with_options(const char * const *usagestr,
169 const struct option *options);
4a59fd13 170
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171extern NORETURN void usage_msg_opt(const char *msg,
172 const char * const *usagestr,
173 const struct option *options);
174
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175extern int optbug(const struct option *opt, const char *reason);
176extern int opterror(const struct option *opt, const char *reason, int flags);
3ea3c215 177/*----- incremental advanced APIs -----*/
7e7bbcb4 178
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179enum {
180 PARSE_OPT_HELP = -1,
181 PARSE_OPT_DONE,
979240fe 182 PARSE_OPT_NON_OPTION,
4b05548f 183 PARSE_OPT_UNKNOWN
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184};
185
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186/*
187 * It's okay for the caller to consume argv/argc in the usual way.
188 * Other fields of that structure are private to parse-options and should not
189 * be modified in any way.
190 */
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191struct parse_opt_ctx_t {
192 const char **argv;
193 const char **out;
194 int argc, cpidx;
195 const char *opt;
196 int flags;
37782920 197 const char *prefix;
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198};
199
200extern void parse_options_start(struct parse_opt_ctx_t *ctx,
37782920 201 int argc, const char **argv, const char *prefix,
9ca1169f 202 const struct option *options, int flags);
7e7bbcb4 203
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204extern int parse_options_step(struct parse_opt_ctx_t *ctx,
205 const struct option *options,
206 const char * const usagestr[]);
207
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208extern int parse_options_end(struct parse_opt_ctx_t *ctx);
209
8b74d75c 210extern int parse_options_concat(struct option *dst, size_t, struct option *src);
7e7bbcb4 211
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212/*----- some often used options -----*/
213extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
1f4a711a 214extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
73e9da01 215extern int parse_opt_color_flag_cb(const struct option *, const char *, int);
7f87aff2 216extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
269defdf 217extern int parse_opt_with_commit(const struct option *, const char *, int);
cb6020bb 218extern int parse_opt_tertiary(const struct option *, const char *, int);
c8ba1639 219extern int parse_opt_string_list(const struct option *, const char *, int);
6acec038 220extern int parse_opt_noop_cb(const struct option *, const char *, int);
0ce865b1 221
fd03881a 222#define OPT__VERBOSE(var, h) OPT_BOOLEAN('v', "verbose", (var), (h))
d52ee6e6 223#define OPT__QUIET(var, h) OPT_BOOLEAN('q', "quiet", (var), (h))
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224#define OPT__VERBOSITY(var) \
225 { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \
226 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
227 { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \
228 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
e21adb8c 229#define OPT__DRY_RUN(var, h) OPT_BOOLEAN('n', "dry-run", (var), (h))
76946b76 230#define OPT__FORCE(var, h) OPT_BOOLEAN('f', "force", (var), (h))
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231#define OPT__ABBREV(var) \
232 { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
233 "use <n> digits to display SHA-1s", \
234 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
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235#define OPT__COLOR(var, h) \
236 OPT_COLOR_FLAG(0, "color", (var), (h))
0ce865b1 237
4a59fd13 238#endif