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1#ifndef __PERF_PARSE_OPTIONS_H
2#define __PERF_PARSE_OPTIONS_H
3
4#include <linux/kernel.h>
5#include <stdbool.h>
6
7enum parse_opt_type {
8 /* special types */
9 OPTION_END,
10 OPTION_ARGUMENT,
11 OPTION_GROUP,
12 /* options with no arguments */
13 OPTION_BIT,
14 OPTION_BOOLEAN,
15 OPTION_INCR,
16 OPTION_SET_UINT,
17 OPTION_SET_PTR,
18 /* options with arguments (usually) */
19 OPTION_STRING,
20 OPTION_INTEGER,
21 OPTION_LONG,
22 OPTION_CALLBACK,
23 OPTION_U64,
24 OPTION_UINTEGER,
25};
26
27enum parse_opt_flags {
28 PARSE_OPT_KEEP_DASHDASH = 1,
29 PARSE_OPT_STOP_AT_NON_OPTION = 2,
30 PARSE_OPT_KEEP_ARGV0 = 4,
31 PARSE_OPT_KEEP_UNKNOWN = 8,
32 PARSE_OPT_NO_INTERNAL_HELP = 16,
33};
34
35enum parse_opt_option_flags {
36 PARSE_OPT_OPTARG = 1,
37 PARSE_OPT_NOARG = 2,
38 PARSE_OPT_NONEG = 4,
39 PARSE_OPT_HIDDEN = 8,
40 PARSE_OPT_LASTARG_DEFAULT = 16,
41};
42
43struct option;
44typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
45
46/*
47 * `type`::
48 * holds the type of the option, you must have an OPTION_END last in your
49 * array.
50 *
51 * `short_name`::
52 * the character to use as a short option name, '\0' if none.
53 *
54 * `long_name`::
55 * the long option name, without the leading dashes, NULL if none.
56 *
57 * `value`::
58 * stores pointers to the values to be filled.
59 *
60 * `argh`::
61 * token to explain the kind of argument this option wants. Keep it
62 * homogenous across the repository.
63 *
64 * `help`::
65 * the short help associated to what the option does.
66 * Must never be NULL (except for OPTION_END).
67 * OPTION_GROUP uses this pointer to store the group header.
68 *
69 * `flags`::
70 * mask of parse_opt_option_flags.
71 * PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
72 * PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
73 * PARSE_OPT_NONEG: says that this option cannot be negated
74 * PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
75 * the long one.
76 *
77 * `callback`::
78 * pointer to the callback to use for OPTION_CALLBACK.
79 *
80 * `defval`::
81 * default value to fill (*->value) with for PARSE_OPT_OPTARG.
82 * OPTION_{BIT,SET_UINT,SET_PTR} store the {mask,integer,pointer} to put in
83 * the value when met.
84 * CALLBACKS can use it like they want.
85 *
86 * `set`::
87 * whether an option was set by the user
88 */
89struct option {
90 enum parse_opt_type type;
91 int short_name;
92 const char *long_name;
93 void *value;
94 const char *argh;
95 const char *help;
96
97 int flags;
98 parse_opt_cb *callback;
99 intptr_t defval;
100 bool *set;
101};
102
103#define check_vtype(v, type) ( BUILD_BUG_ON_ZERO(!__builtin_types_compatible_p(typeof(v), type)) + v )
104
105#define OPT_END() { .type = OPTION_END }
106#define OPT_ARGUMENT(l, h) { .type = OPTION_ARGUMENT, .long_name = (l), .help = (h) }
107#define OPT_GROUP(h) { .type = OPTION_GROUP, .help = (h) }
108#define OPT_BIT(s, l, v, h, b) { .type = OPTION_BIT, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h), .defval = (b) }
109#define OPT_BOOLEAN(s, l, v, h) { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h) }
110#define OPT_BOOLEAN_SET(s, l, v, os, h) \
111 { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), \
112 .value = check_vtype(v, bool *), .help = (h), \
113 .set = check_vtype(os, bool *)}
114#define OPT_INCR(s, l, v, h) { .type = OPTION_INCR, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
115#define OPT_SET_UINT(s, l, v, h, i) { .type = OPTION_SET_UINT, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h), .defval = (i) }
116#define OPT_SET_PTR(s, l, v, h, p) { .type = OPTION_SET_PTR, .short_name = (s), .long_name = (l), .value = (v), .help = (h), .defval = (p) }
117#define OPT_INTEGER(s, l, v, h) { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
118#define OPT_UINTEGER(s, l, v, h) { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h) }
119#define OPT_LONG(s, l, v, h) { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .help = (h) }
120#define OPT_U64(s, l, v, h) { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .help = (h) }
121#define OPT_STRING(s, l, v, a, h) { .type = OPTION_STRING, .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), (a), .help = (h) }
122#define OPT_DATE(s, l, v, h) \
123 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }
124#define OPT_CALLBACK(s, l, v, a, h, f) \
125 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f) }
126#define OPT_CALLBACK_NOOPT(s, l, v, a, h, f) \
127 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f), .flags = PARSE_OPT_NOARG }
128#define OPT_CALLBACK_DEFAULT(s, l, v, a, h, f, d) \
129 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f), .defval = (intptr_t)d, .flags = PARSE_OPT_LASTARG_DEFAULT }
130#define OPT_CALLBACK_DEFAULT_NOOPT(s, l, v, a, h, f, d) \
131 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l),\
132 .value = (v), (a), .help = (h), .callback = (f), .defval = (intptr_t)d,\
133 .flags = PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOARG}
134
135/* parse_options() will filter out the processed options and leave the
136 * non-option argments in argv[].
137 * Returns the number of arguments left in argv[].
138 */
139extern int parse_options(int argc, const char **argv,
140 const struct option *options,
141 const char * const usagestr[], int flags);
142
143extern NORETURN void usage_with_options(const char * const *usagestr,
144 const struct option *options);
145
146/*----- incremantal advanced APIs -----*/
147
148enum {
149 PARSE_OPT_HELP = -1,
150 PARSE_OPT_DONE,
151 PARSE_OPT_LIST,
152 PARSE_OPT_UNKNOWN,
153};
154
155/*
156 * It's okay for the caller to consume argv/argc in the usual way.
157 * Other fields of that structure are private to parse-options and should not
158 * be modified in any way.
159 */
160struct parse_opt_ctx_t {
161 const char **argv;
162 const char **out;
163 int argc, cpidx;
164 const char *opt;
165 int flags;
166};
167
168extern int parse_options_usage(const char * const *usagestr,
169 const struct option *opts,
170 const char *optstr,
171 bool short_opt);
172
173extern void parse_options_start(struct parse_opt_ctx_t *ctx,
174 int argc, const char **argv, int flags);
175
176extern int parse_options_step(struct parse_opt_ctx_t *ctx,
177 const struct option *options,
178 const char * const usagestr[]);
179
180extern int parse_options_end(struct parse_opt_ctx_t *ctx);
181
182
183/*----- some often used options -----*/
184extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
185extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
186extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
187
188#define OPT__VERBOSE(var) OPT_BOOLEAN('v', "verbose", (var), "be verbose")
189#define OPT__QUIET(var) OPT_BOOLEAN('q', "quiet", (var), "be quiet")
190#define OPT__VERBOSITY(var) \
191 { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \
192 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
193 { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \
194 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
195#define OPT__DRY_RUN(var) OPT_BOOLEAN('n', "dry-run", (var), "dry run")
196#define OPT__ABBREV(var) \
197 { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
198 "use <n> digits to display SHA-1s", \
199 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
200
201extern const char *parse_options_fix_filename(const char *prefix, const char *file);
202
203#endif /* __PERF_PARSE_OPTIONS_H */