+/* Licensed under GPLv3+ - see LICENSE file for details */
#ifndef CCAN_OPT_H
#define CCAN_OPT_H
+#include <ccan/compiler/compiler.h>
#include <ccan/typesafe_cb/typesafe_cb.h>
#include <stdbool.h>
+#include <stdlib.h>
-/* You can use this directly to build tables, but the macros will ensure
- * consistency and type safety. */
-enum opt_type {
- OPT_NOARG = 1, /* -f/--foo */
- OPT_HASARG = 2, /* -f arg/--foo=arg/--foo arg */
- OPT_SUBTABLE = 4, /* Actually, longopt points to a subtable... */
- OPT_END = 8, /* End of the table. */
-};
-
-/* Maximum length of arg to show in opt_usage */
-#define OPT_SHOW_LEN 80
-
-struct opt_table {
- const char *names; /* slash-separated names, --longopt or -s */
- enum opt_type type;
- char *(*cb)(void *arg); /* OPT_NOARG */
- char *(*cb_arg)(const char *optarg, void *arg); /* OPT_HASARG */
- void (*show)(char buf[OPT_SHOW_LEN], const void *arg);
- void *arg;
- const char *desc;
-};
+struct opt_table;
/**
* OPT_WITHOUT_ARG() - macro for initializing an opt_table entry (without arg)
- * @names: the names of the option eg. "--foo", "-f" or "--foo/-f/--foobar".
+ * @names: the names of the option eg. "--foo", "-f" or "--foo|-f|--foobar".
* @cb: the callback when the option is found.
* @arg: the argument to hand to @cb.
* @desc: the description for opt_usage(), or opt_hidden.
*
- * This is a typesafe wrapper for intializing a struct opt_table. The callback
+ * This is a typesafe wrapper for initializing a struct opt_table. The callback
* of type "char *cb(type *)", "char *cb(const type *)" or "char *cb(void *)",
* where "type" is the type of the @arg argument.
*
* string and return false.
*
* Any number of equivalent short or long options can be listed in @names,
- * separated by '/'. Short options are a single hyphen followed by a single
- * character, long options are two hypens followed by one or more characters.
+ * separated by '|'. Short options are a single hyphen followed by a single
+ * character, long options are two hyphens followed by one or more characters.
*
* See Also:
* OPT_WITH_ARG()
*/
#define OPT_WITHOUT_ARG(names, cb, arg, desc) \
- { (names), OPT_CB_NOARG((cb), (arg)), (desc) }
+ { (names), OPT_CB_NOARG((cb), (arg)), { (arg) }, (desc) }
/**
* OPT_WITH_ARG() - macro for initializing long and short option (with arg)
- * @names: the option names eg. "--foo=<arg>", "-f" or "-f
/--foo <arg>".
+ * @names: the option names eg. "--foo=<arg>", "-f" or "-f
|--foo <arg>".
* @cb: the callback when the option is found (along with <arg>).
* @show: the callback to print the value in get_usage (or NULL)
* @arg: the argument to hand to @cb and @show
* @desc: the description for opt_usage(), or opt_hidden.
*
- * This is a typesafe wrapper for intializing a struct opt_table. The callback
+ * This is a typesafe wrapper for initializing a struct opt_table. The callback
* is of type "char *cb(const char *, type *)",
* "char *cb(const char *, const type *)" or "char *cb(const char *, void *)",
* where "type" is the type of the @arg argument. The first argument to the
* nul-terminate that buffer.
*
* Any number of equivalent short or long options can be listed in @names,
- * separated by '/'. Short options are a single hyphen followed by a single
- * character, long options are two hypens followed by one or more characters.
+ * separated by '|'. Short options are a single hyphen followed by a single
+ * character, long options are two hyphens followed by one or more characters.
* A space or equals in @names is ignored for parsing, and only used
* for printing the usage.
*
* OPT_WITHOUT_ARG()
*/
#define OPT_WITH_ARG(name, cb, show, arg, desc) \
- { (name), OPT_CB_ARG((cb), (show), (arg)), (desc) }
+ { (name), OPT_CB_ARG((cb), (show), (arg)), { (arg) }, (desc) }
/**
* OPT_SUBTABLE() - macro for including another table inside a table.
*/
#define OPT_SUBTABLE(table, desc) \
{ (const char *)(table), OPT_SUBTABLE, \
- sizeof(_check_is_entry(table)) ? NULL : NULL, NULL, NULL, NULL, (desc) }
+ sizeof(_check_is_entry(table)) ? NULL : NULL, NULL, NULL, \
+ { NULL }, (desc) }
/**
* OPT_ENDTABLE - macro to create final entry in table.
*
* This must be the final element in the opt_table array.
*/
-#define OPT_ENDTABLE { NULL, OPT_END }
+#define OPT_ENDTABLE { NULL, OPT_END, NULL, NULL, NULL, { NULL }, NULL }
/**
* opt_register_table - register a table of options
* ...
* opt_register_table(opts, NULL);
*/
-void opt_register_table(const struct opt_table table[], const char *desc);
+void opt_register_table(const struct opt_table *table, const char *desc);
/**
* opt_register_noarg - register an option with no arguments
- * @names: the names of the option eg. "--foo", "-f" or "--foo/-f/--foobar".
+ * @names: the names of the option eg. "--foo", "-f" or "--foo|-f|--foobar".
* @cb: the callback when the option is found.
* @arg: the argument to hand to @cb.
- * @desc: the verbose desction of the option (for opt_usage()), or NULL.
+ * @desc: the verbose description of the option (for opt_usage()), or NULL.
*
* This is used for registering a single commandline option which takes
* no argument.
* string and return false.
*/
#define opt_register_noarg(names, cb, arg, desc) \
- _opt_register((names), OPT_CB_NOARG((cb), (arg)), (desc))
+ _opt_register((names), OPT_CB_NOARG((cb), (arg)), (arg), (desc))
/**
* opt_register_arg - register an option with an arguments
- * @names: the names of the option eg. "--foo", "-f" or "--foo/-f/--foobar".
+ * @names: the names of the option eg. "--foo", "-f" or "--foo|-f|--foobar".
* @cb: the callback when the option is found.
* @show: the callback to print the value in get_usage (or NULL)
* @arg: the argument to hand to @cb.
- * @desc: the verbose desction of the option (for opt_usage()), or NULL.
+ * @desc: the verbose description of the option (for opt_usage()), or NULL.
*
* This is used for registering a single commandline option which takes
* an argument.
* errx(1, "BOOM! %s", optarg);
* }
* ...
- * opt_register_arg("--explode/--boom", explode, NULL, NULL, opt_hidden);
+ * opt_register_arg("--explode|--boom", explode, NULL, NULL, opt_hidden);
*/
#define opt_register_arg(names, cb, show, arg, desc) \
- _opt_register((names), OPT_CB_ARG((cb), (show), (arg)), (desc))
+ _opt_register((names), OPT_CB_ARG((cb), (show), (arg)), (arg), (desc))
/**
* opt_parse - parse arguments.
*/
bool opt_parse(int *argc, char *argv[], void (*errlog)(const char *fmt, ...));
+/**
+ * opt_free_table - free the table.
+ *
+ * This frees the internal memory. Call this as the last
+ * opt function.
+ */
+void opt_free_table(void);
+
/**
* opt_log_stderr - print message to stderr.
* @fmt: printf-style format.
*/
extern const char opt_hidden[];
+/* Maximum length of arg to show in opt_usage */
+#define OPT_SHOW_LEN 80
+
/* Standard helpers. You can write your own: */
/* Sets the @b to true. */
char *opt_set_bool(bool *b);
char *opt_usage_and_exit(const char *extra);
/* Below here are private declarations. */
+/* You can use this directly to build tables, but the macros will ensure
+ * consistency and type safety. */
+enum opt_type {
+ OPT_NOARG = 1, /* -f|--foo */
+ OPT_HASARG = 2, /* -f arg|--foo=arg|--foo arg */
+ OPT_SUBTABLE = 4, /* Actually, longopt points to a subtable... */
+ OPT_END = 8, /* End of the table. */
+};
+
+struct opt_table {
+ const char *names; /* pipe-separated names, --longopt or -s */
+ enum opt_type type;
+ char *(*cb)(void *arg); /* OPT_NOARG */
+ char *(*cb_arg)(const char *optarg, void *arg); /* OPT_HASARG */
+ void (*show)(char buf[OPT_SHOW_LEN], const void *arg);
+ union {
+ const void *carg;
+ void *arg;
+ size_t tlen;
+ } u;
+ const char *desc;
+};
+
/* Resolves to the four parameters for non-arg callbacks. */
#define OPT_CB_NOARG(cb, arg) \
OPT_NOARG, \
- cast_if_any(char *(*)(void *), (cb), &*(cb), \
- char *(*)(typeof(*(arg))*), \
- char *(*)(const typeof(*(arg))*), \
- char *(*)(const void *)), \
- NULL, NULL, (arg)
+ typesafe_cb_cast3(char *(*)(void *), \
+ char *(*)(typeof(*(arg))*), \
+ char *(*)(const typeof(*(arg))*), \
+ char *(*)(const void *), (cb)), \
+ NULL, NULL
/* Resolves to the four parameters for arg callbacks. */
#define OPT_CB_ARG(cb, show, arg) \
OPT_HASARG, NULL, \
- cast_if_any(char *(*)(const char *,void *), (cb), &*(cb), \
- char *(*)(const char *, typeof(*(arg))*), \
- char *(*)(const char *, const typeof(*(arg))*), \
- char *(*)(const char *, const void *)), \
- cast_if_type(void (*)(char buf[], const void *), (show), &*(show), \
- void (*)(char buf[], const typeof(*(arg))*)), \
- (arg)
+ typesafe_cb_cast3(char *(*)(const char *,void *), \
+ char *(*)(const char *, typeof(*(arg))*), \
+ char *(*)(const char *, const typeof(*(arg))*), \
+ char *(*)(const char *, const void *), \
+ (cb)), \
+ typesafe_cb_cast(void (*)(char buf[], const void *), \
+ void (*)(char buf[], const typeof(*(arg))*), (show))
/* Non-typesafe register function. */
void _opt_register(const char *names, enum opt_type type,
char *(*cb)(void *arg),
char *(*cb_arg)(const char *optarg, void *arg),
void (*show)(char buf[OPT_SHOW_LEN], const void *arg),
- void *arg, const char *desc);
+ const void *arg, const char *desc);
/* We use this to get typechecking for OPT_SUBTABLE */
-static inline int _check_is_entry(struct opt_table *e) { return 0; }
+static inline int _check_is_entry(struct opt_table *e UNUSED) { return 0; }
#endif /* CCAN_OPT_H */
projects / ccan / blobdiff