summaryrefslogtreecommitdiff
path: root/parse-options.h
diff options
context:
space:
mode:
Diffstat (limited to 'parse-options.h')
-rw-r--r--parse-options.h129
1 files changed, 81 insertions, 48 deletions
diff --git a/parse-options.h b/parse-options.h
index 14fe324..cc9230a 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -10,6 +10,7 @@ enum parse_opt_type {
/* options with no arguments */
OPTION_BIT,
OPTION_NEGBIT,
+ OPTION_BITOP,
OPTION_COUNTUP,
OPTION_SET_INT,
OPTION_CMDMODE,
@@ -27,7 +28,8 @@ enum parse_opt_flags {
PARSE_OPT_STOP_AT_NON_OPTION = 2,
PARSE_OPT_KEEP_ARGV0 = 4,
PARSE_OPT_KEEP_UNKNOWN = 8,
- PARSE_OPT_NO_INTERNAL_HELP = 16
+ PARSE_OPT_NO_INTERNAL_HELP = 16,
+ PARSE_OPT_ONE_SHOT = 32
};
enum parse_opt_option_flags {
@@ -47,8 +49,9 @@ struct option;
typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
struct parse_opt_ctx_t;
-typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
- const struct option *opt, int unset);
+typedef enum parse_opt_result parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
+ const struct option *opt,
+ const char *arg, int unset);
/*
* `type`::
@@ -98,13 +101,16 @@ typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
* the option takes optional argument.
*
* `callback`::
- * pointer to the callback to use for OPTION_CALLBACK or
- * OPTION_LOWLEVEL_CALLBACK.
+ * pointer to the callback to use for OPTION_CALLBACK
*
* `defval`::
* default value to fill (*->value) with for PARSE_OPT_OPTARG.
* OPTION_{BIT,SET_INT} store the {mask,integer} to put in the value when met.
* CALLBACKS can use it like they want.
+ *
+ * `ll_callback`::
+ * pointer to the callback to use for OPTION_LOWLEVEL_CALLBACK
+ *
*/
struct option {
enum parse_opt_type type;
@@ -117,6 +123,8 @@ struct option {
int flags;
parse_opt_cb *callback;
intptr_t defval;
+ parse_opt_ll_cb *ll_callback;
+ intptr_t extra;
};
#define OPT_BIT_F(s, l, v, h, b, f) { OPTION_BIT, (s), (l), (v), NULL, (h), \
@@ -126,12 +134,19 @@ struct option {
#define OPT_SET_INT_F(s, l, v, h, i, f) { OPTION_SET_INT, (s), (l), (v), NULL, \
(h), PARSE_OPT_NOARG | (f), NULL, (i) }
#define OPT_BOOL_F(s, l, v, h, f) OPT_SET_INT_F(s, l, v, h, 1, f)
+#define OPT_CALLBACK_F(s, l, v, a, h, f, cb) \
+ { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), (cb) }
+#define OPT_STRING_F(s, l, v, a, h, f) { OPTION_STRING, (s), (l), (v), (a), (h), (f) }
+#define OPT_INTEGER_F(s, l, v, h, f) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h), (f) }
#define OPT_END() { OPTION_END }
-#define OPT_ARGUMENT(l, h) { OPTION_ARGUMENT, 0, (l), NULL, NULL, \
- (h), PARSE_OPT_NOARG}
+#define OPT_ARGUMENT(l, v, h) { OPTION_ARGUMENT, 0, (l), (v), NULL, \
+ (h), PARSE_OPT_NOARG, NULL, 1 }
#define OPT_GROUP(h) { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
#define OPT_BIT(s, l, v, h, b) OPT_BIT_F(s, l, v, h, b, 0)
+#define OPT_BITOP(s, l, v, h, set, clear) { OPTION_BITOP, (s), (l), (v), NULL, (h), \
+ PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, \
+ (set), NULL, (clear) }
#define OPT_NEGBIT(s, l, v, h, b) { OPTION_NEGBIT, (s), (l), (v), NULL, \
(h), PARSE_OPT_NOARG, NULL, (b) }
#define OPT_COUNTUP(s, l, v, h) OPT_COUNTUP_F(s, l, v, h, 0)
@@ -141,10 +156,10 @@ struct option {
(h), PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1}
#define OPT_CMDMODE(s, l, v, h, i) { OPTION_CMDMODE, (s), (l), (v), NULL, \
(h), PARSE_OPT_NOARG|PARSE_OPT_NONEG, NULL, (i) }
-#define OPT_INTEGER(s, l, v, h) { OPTION_INTEGER, (s), (l), (v), N_("n"), (h) }
+#define OPT_INTEGER(s, l, v, h) OPT_INTEGER_F(s, l, v, h, 0)
#define OPT_MAGNITUDE(s, l, v, h) { OPTION_MAGNITUDE, (s), (l), (v), \
N_("n"), (h), PARSE_OPT_NONEG }
-#define OPT_STRING(s, l, v, a, h) { OPTION_STRING, (s), (l), (v), (a), (h) }
+#define OPT_STRING(s, l, v, a, h) OPT_STRING_F(s, l, v, a, h, 0)
#define OPT_STRING_LIST(s, l, v, a, h) \
{ OPTION_CALLBACK, (s), (l), (v), (a), \
(h), 0, &parse_opt_string_list }
@@ -153,8 +168,7 @@ struct option {
#define OPT_EXPIRY_DATE(s, l, v, h) \
{ OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0, \
parse_opt_expiry_date_cb }
-#define OPT_CALLBACK(s, l, v, a, h, f) \
- { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
+#define OPT_CALLBACK(s, l, v, a, h, f) OPT_CALLBACK_F(s, l, v, a, h, 0, f)
#define OPT_NUMBER_CALLBACK(v, h, f) \
{ OPTION_NUMBER, 0, NULL, (v), NULL, (h), \
PARSE_OPT_NOARG | PARSE_OPT_NONEG, (f) }
@@ -169,23 +183,31 @@ struct option {
N_("no-op (backward compatibility)"), \
PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, parse_opt_noop_cb }
-/* parse_options() will filter out the processed options and leave the
- * non-option arguments in argv[]. usagestr strings should be marked
- * for translation with N_().
+/*
+ * parse_options() will filter out the processed options and leave the
+ * non-option arguments in argv[]. argv0 is assumed program name and
+ * skipped.
+ *
+ * usagestr strings should be marked for translation with N_().
+ *
* Returns the number of arguments left in argv[].
+ *
+ * In one-shot mode, argv0 is not a program name, argv[] is left
+ * untouched and parse_options() returns the number of options
+ * processed.
*/
-extern int parse_options(int argc, const char **argv, const char *prefix,
- const struct option *options,
- const char * const usagestr[], int flags);
+int parse_options(int argc, const char **argv, const char *prefix,
+ const struct option *options,
+ const char * const usagestr[], int flags);
-extern NORETURN void usage_with_options(const char * const *usagestr,
- const struct option *options);
+NORETURN void usage_with_options(const char * const *usagestr,
+ const struct option *options);
-extern NORETURN void usage_msg_opt(const char *msg,
- const char * const *usagestr,
- const struct option *options);
+NORETURN void usage_msg_opt(const char *msg,
+ const char * const *usagestr,
+ const struct option *options);
-extern int optbug(const struct option *opt, const char *reason);
+int optbug(const struct option *opt, const char *reason);
const char *optname(const struct option *opt, int flags);
/*
@@ -202,14 +224,25 @@ const char *optname(const struct option *opt, int flags);
BUG("option callback does not expect an argument"); \
} while (0)
+/*
+ * Similar to the assertions above, but checks that "arg" is always non-NULL.
+ * This assertion also implies BUG_ON_OPT_NEG(), letting you declare both
+ * assertions in a single line.
+ */
+#define BUG_ON_OPT_NEG_NOARG(unset, arg) do { \
+ BUG_ON_OPT_NEG(unset); \
+ if(!(arg)) \
+ BUG("option callback expects an argument"); \
+} while(0)
+
/*----- incremental advanced APIs -----*/
-enum {
- PARSE_OPT_COMPLETE = -2,
- PARSE_OPT_HELP = -1,
- PARSE_OPT_DONE,
+enum parse_opt_result {
+ PARSE_OPT_COMPLETE = -3,
+ PARSE_OPT_HELP = -2,
+ PARSE_OPT_ERROR = -1, /* must be the same as error() */
+ PARSE_OPT_DONE = 0, /* fixed so that "return 0" works */
PARSE_OPT_NON_OPTION,
- PARSE_OPT_ERROR,
PARSE_OPT_UNKNOWN
};
@@ -227,31 +260,31 @@ struct parse_opt_ctx_t {
const char *prefix;
};
-extern void parse_options_start(struct parse_opt_ctx_t *ctx,
- int argc, const char **argv, const char *prefix,
- const struct option *options, int flags);
+void parse_options_start(struct parse_opt_ctx_t *ctx,
+ int argc, const char **argv, const char *prefix,
+ const struct option *options, int flags);
-extern int parse_options_step(struct parse_opt_ctx_t *ctx,
- const struct option *options,
- const char * const usagestr[]);
+int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[]);
-extern int parse_options_end(struct parse_opt_ctx_t *ctx);
+int parse_options_end(struct parse_opt_ctx_t *ctx);
-extern struct option *parse_options_concat(struct option *a, struct option *b);
+struct option *parse_options_concat(struct option *a, struct option *b);
/*----- some often used options -----*/
-extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
-extern int parse_opt_expiry_date_cb(const struct option *, const char *, int);
-extern int parse_opt_color_flag_cb(const struct option *, const char *, int);
-extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
-extern int parse_opt_object_name(const struct option *, const char *, int);
-extern int parse_opt_commits(const struct option *, const char *, int);
-extern int parse_opt_tertiary(const struct option *, const char *, int);
-extern int parse_opt_string_list(const struct option *, const char *, int);
-extern int parse_opt_noop_cb(const struct option *, const char *, int);
-extern int parse_opt_unknown_cb(const struct option *, const char *, int);
-extern int parse_opt_passthru(const struct option *, const char *, int);
-extern int parse_opt_passthru_argv(const struct option *, const char *, int);
+int parse_opt_abbrev_cb(const struct option *, const char *, int);
+int parse_opt_expiry_date_cb(const struct option *, const char *, int);
+int parse_opt_color_flag_cb(const struct option *, const char *, int);
+int parse_opt_verbosity_cb(const struct option *, const char *, int);
+int parse_opt_object_name(const struct option *, const char *, int);
+int parse_opt_commits(const struct option *, const char *, int);
+int parse_opt_tertiary(const struct option *, const char *, int);
+int parse_opt_string_list(const struct option *, const char *, int);
+int parse_opt_noop_cb(const struct option *, const char *, int);
+int parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx, const struct option *, const char *, int);
+int parse_opt_passthru(const struct option *, const char *, int);
+int parse_opt_passthru_argv(const struct option *, const char *, int);
#define OPT__VERBOSE(var, h) OPT_COUNTUP('v', "verbose", (var), (h))
#define OPT__QUIET(var, h) OPT_COUNTUP('q', "quiet", (var), (h))