tools/perf/util/parse-options.h

   1 #ifndef __PERF_PARSE_OPTIONS_H
   2 #define __PERF_PARSE_OPTIONS_H
   3
   4 #include <linux/kernel.h>
   5 #include <stdbool.h>
   6
   7 enum 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
  27 enum 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
  35 enum 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
  43 struct option;
  44 typedef 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  */
  89 struct 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         void *data;
 102 };
 103
 104 #define check_vtype(v, type) ( BUILD_BUG_ON_ZERO(!__builtin_types_compatible_p(typeof(v), type)) + v )
 105
 106 #define OPT_END()                   { .type = OPTION_END }
 107 #define OPT_ARGUMENT(l, h)          { .type = OPTION_ARGUMENT, .long_name = (l), .help = (h) }
 108 #define OPT_GROUP(h)                { .type = OPTION_GROUP, .help = (h) }
 109 #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) }
 110 #define OPT_BOOLEAN(s, l, v, h)     { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h) }
 111 #define OPT_BOOLEAN_SET(s, l, v, os, h) \
 112         { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), \
 113         .value = check_vtype(v, bool *), .help = (h), \
 114         .set = check_vtype(os, bool *)}
 115 #define OPT_INCR(s, l, v, h)        { .type = OPTION_INCR, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
 116 #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) }
 117 #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) }
 118 #define OPT_INTEGER(s, l, v, h)     { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
 119 #define OPT_UINTEGER(s, l, v, h)    { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h) }
 120 #define OPT_LONG(s, l, v, h)        { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .help = (h) }
 121 #define OPT_U64(s, l, v, h)         { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .help = (h) }
 122 #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) }
 123 #define OPT_DATE(s, l, v, h) \
 124         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }
 125 #define OPT_CALLBACK(s, l, v, a, h, f) \
 126         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f) }
 127 #define OPT_CALLBACK_NOOPT(s, l, v, a, h, f) \
 128         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f), .flags = PARSE_OPT_NOARG }
 129 #define OPT_CALLBACK_DEFAULT(s, l, v, a, h, f, d) \
 130         { .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 }
 131 #define OPT_CALLBACK_DEFAULT_NOOPT(s, l, v, a, h, f, d) \
 132         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l),\
 133         .value = (v), (a), .help = (h), .callback = (f), .defval = (intptr_t)d,\
 134         .flags = PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOARG}
 135 #define OPT_CALLBACK_OPTARG(s, l, v, d, a, h, f) \
 136         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), \
 137           .value = (v), (a), .help = (h), .callback = (f), \
 138           .flags = PARSE_OPT_OPTARG, .data = (d) }
 139
 140 /* parse_options() will filter out the processed options and leave the
 141  * non-option argments in argv[].
 142  * Returns the number of arguments left in argv[].
 143  */
 144 extern int parse_options(int argc, const char **argv,
 145                          const struct option *options,
 146                          const char * const usagestr[], int flags);
 147
 148 extern int parse_options_subcommand(int argc, const char **argv,
 149                                 const struct option *options,
 150                                 const char *const subcommands[],
 151                                 const char *usagestr[], int flags);
 152
 153 extern NORETURN void usage_with_options(const char * const *usagestr,
 154                                         const struct option *options);
 155
 156 /*----- incremantal advanced APIs -----*/
 157
 158 enum {
 159         PARSE_OPT_HELP = -1,
 160         PARSE_OPT_DONE,
 161         PARSE_OPT_LIST_OPTS,
 162         PARSE_OPT_LIST_SUBCMDS,
 163         PARSE_OPT_UNKNOWN,
 164 };
 165
 166 /*
 167  * It's okay for the caller to consume argv/argc in the usual way.
 168  * Other fields of that structure are private to parse-options and should not
 169  * be modified in any way.
 170  */
 171 struct parse_opt_ctx_t {
 172         const char **argv;
 173         const char **out;
 174         int argc, cpidx;
 175         const char *opt;
 176         int flags;
 177 };
 178
 179 extern int parse_options_usage(const char * const *usagestr,
 180                                const struct option *opts,
 181                                const char *optstr,
 182                                bool short_opt);
 183
 184 extern void parse_options_start(struct parse_opt_ctx_t *ctx,
 185                                 int argc, const char **argv, int flags);
 186
 187 extern int parse_options_step(struct parse_opt_ctx_t *ctx,
 188                               const struct option *options,
 189                               const char * const usagestr[]);
 190
 191 extern int parse_options_end(struct parse_opt_ctx_t *ctx);
 192
 193
 194 /*----- some often used options -----*/
 195 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
 196 extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
 197 extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
 198
 199 #define OPT__VERBOSE(var)  OPT_BOOLEAN('v', "verbose", (var), "be verbose")
 200 #define OPT__QUIET(var)    OPT_BOOLEAN('q', "quiet",   (var), "be quiet")
 201 #define OPT__VERBOSITY(var) \
 202         { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \
 203           PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
 204         { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \
 205           PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
 206 #define OPT__DRY_RUN(var)  OPT_BOOLEAN('n', "dry-run", (var), "dry run")
 207 #define OPT__ABBREV(var)  \
 208         { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
 209           "use <n> digits to display SHA-1s", \
 210           PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
 211
 212 extern const char *parse_options_fix_filename(const char *prefix, const char *file);
 213
 214 #endif /* __PERF_PARSE_OPTIONS_H */