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         PARSE_OPT_DISABLED = 32,
  42         PARSE_OPT_EXCLUSIVE = 64,
  43         PARSE_OPT_NOEMPTY  = 128,
  44 };
  45
  46 struct option;
  47 typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
  48
  49 /*
  50  * `type`::
  51  *   holds the type of the option, you must have an OPTION_END last in your
  52  *   array.
  53  *
  54  * `short_name`::
  55  *   the character to use as a short option name, '\0' if none.
  56  *
  57  * `long_name`::
  58  *   the long option name, without the leading dashes, NULL if none.
  59  *
  60  * `value`::
  61  *   stores pointers to the values to be filled.
  62  *
  63  * `argh`::
  64  *   token to explain the kind of argument this option wants. Keep it
  65  *   homogenous across the repository.
  66  *
  67  * `help`::
  68  *   the short help associated to what the option does.
  69  *   Must never be NULL (except for OPTION_END).
  70  *   OPTION_GROUP uses this pointer to store the group header.
  71  *
  72  * `flags`::
  73  *   mask of parse_opt_option_flags.
  74  *   PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
  75  *   PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
  76  *   PARSE_OPT_NONEG: says that this option cannot be negated
  77  *   PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
  78  *                    the long one.
  79  *
  80  * `callback`::
  81  *   pointer to the callback to use for OPTION_CALLBACK.
  82  *
  83  * `defval`::
  84  *   default value to fill (*->value) with for PARSE_OPT_OPTARG.
  85  *   OPTION_{BIT,SET_UINT,SET_PTR} store the {mask,integer,pointer} to put in
  86  *   the value when met.
  87  *   CALLBACKS can use it like they want.
  88  *
  89  * `set`::
  90  *   whether an option was set by the user
  91  */
  92 struct option {
  93         enum parse_opt_type type;
  94         int short_name;
  95         const char *long_name;
  96         void *value;
  97         const char *argh;
  98         const char *help;
  99
 100         int flags;
 101         parse_opt_cb *callback;
 102         intptr_t defval;
 103         bool *set;
 104         void *data;
 105 };
 106
 107 #define check_vtype(v, type) ( BUILD_BUG_ON_ZERO(!__builtin_types_compatible_p(typeof(v), type)) + v )
 108
 109 #define OPT_END()                   { .type = OPTION_END }
 110 #define OPT_ARGUMENT(l, h)          { .type = OPTION_ARGUMENT, .long_name = (l), .help = (h) }
 111 #define OPT_GROUP(h)                { .type = OPTION_GROUP, .help = (h) }
 112 #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) }
 113 #define OPT_BOOLEAN(s, l, v, h)     { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h) }
 114 #define OPT_BOOLEAN_SET(s, l, v, os, h) \
 115         { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), \
 116         .value = check_vtype(v, bool *), .help = (h), \
 117         .set = check_vtype(os, bool *)}
 118 #define OPT_INCR(s, l, v, h)        { .type = OPTION_INCR, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
 119 #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) }
 120 #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) }
 121 #define OPT_INTEGER(s, l, v, h)     { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) }
 122 #define OPT_UINTEGER(s, l, v, h)    { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h) }
 123 #define OPT_LONG(s, l, v, h)        { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .help = (h) }
 124 #define OPT_U64(s, l, v, h)         { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .help = (h) }
 125 #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) }
 126 #define OPT_STRING_OPTARG(s, l, v, a, h, d) \
 127         { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), \
 128           .value = check_vtype(v, const char **), (a), .help = (h), \
 129           .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d) }
 130 #define OPT_STRING_NOEMPTY(s, l, v, a, h)   { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), (a), .help = (h), .flags = PARSE_OPT_NOEMPTY}
 131 #define OPT_DATE(s, l, v, h) \
 132         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }
 133 #define OPT_CALLBACK(s, l, v, a, h, f) \
 134         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f) }
 135 #define OPT_CALLBACK_NOOPT(s, l, v, a, h, f) \
 136         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f), .flags = PARSE_OPT_NOARG }
 137 #define OPT_CALLBACK_DEFAULT(s, l, v, a, h, f, d) \
 138         { .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 }
 139 #define OPT_CALLBACK_DEFAULT_NOOPT(s, l, v, a, h, f, d) \
 140         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l),\
 141         .value = (v), (a), .help = (h), .callback = (f), .defval = (intptr_t)d,\
 142         .flags = PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOARG}
 143 #define OPT_CALLBACK_OPTARG(s, l, v, d, a, h, f) \
 144         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), \
 145           .value = (v), (a), .help = (h), .callback = (f), \
 146           .flags = PARSE_OPT_OPTARG, .data = (d) }
 147
 148 /* parse_options() will filter out the processed options and leave the
 149  * non-option argments in argv[].
 150  * Returns the number of arguments left in argv[].
 151  */
 152 extern int parse_options(int argc, const char **argv,
 153                          const struct option *options,
 154                          const char * const usagestr[], int flags);
 155
 156 extern int parse_options_subcommand(int argc, const char **argv,
 157                                 const struct option *options,
 158                                 const char *const subcommands[],
 159                                 const char *usagestr[], int flags);
 160
 161 extern NORETURN void usage_with_options(const char * const *usagestr,
 162                                         const struct option *options);
 163
 164 /*----- incremantal advanced APIs -----*/
 165
 166 enum {
 167         PARSE_OPT_HELP = -1,
 168         PARSE_OPT_DONE,
 169         PARSE_OPT_LIST_OPTS,
 170         PARSE_OPT_LIST_SUBCMDS,
 171         PARSE_OPT_UNKNOWN,
 172 };
 173
 174 /*
 175  * It's okay for the caller to consume argv/argc in the usual way.
 176  * Other fields of that structure are private to parse-options and should not
 177  * be modified in any way.
 178  */
 179 struct parse_opt_ctx_t {
 180         const char **argv;
 181         const char **out;
 182         int argc, cpidx;
 183         const char *opt;
 184         const struct option *excl_opt;
 185         int flags;
 186 };
 187
 188 extern int parse_options_usage(const char * const *usagestr,
 189                                const struct option *opts,
 190                                const char *optstr,
 191                                bool short_opt);
 192
 193 extern void parse_options_start(struct parse_opt_ctx_t *ctx,
 194                                 int argc, const char **argv, int flags);
 195
 196 extern int parse_options_step(struct parse_opt_ctx_t *ctx,
 197                               const struct option *options,
 198                               const char * const usagestr[]);
 199
 200 extern int parse_options_end(struct parse_opt_ctx_t *ctx);
 201
 202
 203 /*----- some often used options -----*/
 204 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
 205 extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
 206 extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
 207
 208 #define OPT__VERBOSE(var)  OPT_BOOLEAN('v', "verbose", (var), "be verbose")
 209 #define OPT__QUIET(var)    OPT_BOOLEAN('q', "quiet",   (var), "be quiet")
 210 #define OPT__VERBOSITY(var) \
 211         { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \
 212           PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \
 213         { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \
 214           PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }
 215 #define OPT__DRY_RUN(var)  OPT_BOOLEAN('n', "dry-run", (var), "dry run")
 216 #define OPT__ABBREV(var)  \
 217         { OPTION_CALLBACK, 0, "abbrev", (var), "n", \
 218           "use <n> digits to display SHA-1s", \
 219           PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
 220
 221 extern const char *parse_options_fix_filename(const char *prefix, const char *file);
 222
 223 void set_option_flag(struct option *opts, int sopt, const char *lopt, int flag);
 224 #endif /* __PERF_PARSE_OPTIONS_H */