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 struct option { 87 enum parse_opt_type type; 88 int short_name; 89 const char *long_name; 90 void *value; 91 const char *argh; 92 const char *help; 93 94 int flags; 95 parse_opt_cb *callback; 96 intptr_t defval; 97 }; 98 99 #define check_vtype(v, type) ( BUILD_BUG_ON_ZERO(!__builtin_types_compatible_p(typeof(v), type)) + v ) 100 101 #define OPT_END() { .type = OPTION_END } 102 #define OPT_ARGUMENT(l, h) { .type = OPTION_ARGUMENT, .long_name = (l), .help = (h) } 103 #define OPT_GROUP(h) { .type = OPTION_GROUP, .help = (h) } 104 #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) } 105 #define OPT_BOOLEAN(s, l, v, h) { .type = OPTION_BOOLEAN, .short_name = (s), .long_name = (l), .value = check_vtype(v, bool *), .help = (h) } 106 #define OPT_INCR(s, l, v, h) { .type = OPTION_INCR, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) } 107 #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) } 108 #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) } 109 #define OPT_INTEGER(s, l, v, h) { .type = OPTION_INTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, int *), .help = (h) } 110 #define OPT_UINTEGER(s, l, v, h) { .type = OPTION_UINTEGER, .short_name = (s), .long_name = (l), .value = check_vtype(v, unsigned int *), .help = (h) } 111 #define OPT_LONG(s, l, v, h) { .type = OPTION_LONG, .short_name = (s), .long_name = (l), .value = check_vtype(v, long *), .help = (h) } 112 #define OPT_U64(s, l, v, h) { .type = OPTION_U64, .short_name = (s), .long_name = (l), .value = check_vtype(v, u64 *), .help = (h) } 113 #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) } 114 #define OPT_DATE(s, l, v, h) \ 115 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb } 116 #define OPT_CALLBACK(s, l, v, a, h, f) \ 117 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f) } 118 #define OPT_CALLBACK_NOOPT(s, l, v, a, h, f) \ 119 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), (a), .help = (h), .callback = (f), .flags = PARSE_OPT_NOARG } 120 #define OPT_CALLBACK_DEFAULT(s, l, v, a, h, f, d) \ 121 { .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 } 122 #define OPT_CALLBACK_DEFAULT_NOOPT(s, l, v, a, h, f, d) \ 123 { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l),\ 124 .value = (v), (a), .help = (h), .callback = (f), .defval = (intptr_t)d,\ 125 .flags = PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOARG} 126 127 /* parse_options() will filter out the processed options and leave the 128 * non-option argments in argv[]. 129 * Returns the number of arguments left in argv[]. 130 */ 131 extern int parse_options(int argc, const char **argv, 132 const struct option *options, 133 const char * const usagestr[], int flags); 134 135 extern NORETURN void usage_with_options(const char * const *usagestr, 136 const struct option *options); 137 138 /*----- incremantal advanced APIs -----*/ 139 140 enum { 141 PARSE_OPT_HELP = -1, 142 PARSE_OPT_DONE, 143 PARSE_OPT_LIST, 144 PARSE_OPT_UNKNOWN, 145 }; 146 147 /* 148 * It's okay for the caller to consume argv/argc in the usual way. 149 * Other fields of that structure are private to parse-options and should not 150 * be modified in any way. 151 */ 152 struct parse_opt_ctx_t { 153 const char **argv; 154 const char **out; 155 int argc, cpidx; 156 const char *opt; 157 int flags; 158 }; 159 160 extern int parse_options_usage(const char * const *usagestr, 161 const struct option *opts); 162 163 extern void parse_options_start(struct parse_opt_ctx_t *ctx, 164 int argc, const char **argv, int flags); 165 166 extern int parse_options_step(struct parse_opt_ctx_t *ctx, 167 const struct option *options, 168 const char * const usagestr[]); 169 170 extern int parse_options_end(struct parse_opt_ctx_t *ctx); 171 172 173 /*----- some often used options -----*/ 174 extern int parse_opt_abbrev_cb(const struct option *, const char *, int); 175 extern int parse_opt_approxidate_cb(const struct option *, const char *, int); 176 extern int parse_opt_verbosity_cb(const struct option *, const char *, int); 177 178 #define OPT__VERBOSE(var) OPT_BOOLEAN('v', "verbose", (var), "be verbose") 179 #define OPT__QUIET(var) OPT_BOOLEAN('q', "quiet", (var), "be quiet") 180 #define OPT__VERBOSITY(var) \ 181 { OPTION_CALLBACK, 'v', "verbose", (var), NULL, "be more verbose", \ 182 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 }, \ 183 { OPTION_CALLBACK, 'q', "quiet", (var), NULL, "be more quiet", \ 184 PARSE_OPT_NOARG, &parse_opt_verbosity_cb, 0 } 185 #define OPT__DRY_RUN(var) OPT_BOOLEAN('n', "dry-run", (var), "dry run") 186 #define OPT__ABBREV(var) \ 187 { OPTION_CALLBACK, 0, "abbrev", (var), "n", \ 188 "use <n> digits to display SHA-1s", \ 189 PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 } 190 191 extern const char *parse_options_fix_filename(const char *prefix, const char *file); 192 193 #endif /* __PERF_PARSE_OPTIONS_H */ 194