Fix deletion of last character in levenshtein distance

[git.git] / parse-options.h

diff --git a/parse-options.h b/parse-options.h
index 65bce6eafd19bfedd7d3b0b31ad81625842a7c0b..5199950c006df4625355ce227970cc3e8a72ed41 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -2,9 +2,16 @@
 #define PARSE_OPTIONS_H
 
 enum parse_opt_type {
+       /* special types */
        OPTION_END,
+       OPTION_ARGUMENT,
        OPTION_GROUP,
-       OPTION_BOOLEAN,
+       /* options with no arguments */
+       OPTION_BIT,
+       OPTION_BOOLEAN, /* _INCR would have been a better name */
+       OPTION_SET_INT,
+       OPTION_SET_PTR,
+       /* options with arguments (usually) */
        OPTION_STRING,
        OPTION_INTEGER,
        OPTION_CALLBACK,
@@ -12,11 +19,16 @@ enum parse_opt_type {
 
 enum parse_opt_flags {
        PARSE_OPT_KEEP_DASHDASH = 1,
+       PARSE_OPT_STOP_AT_NON_OPTION = 2,
+       PARSE_OPT_KEEP_ARGV0 = 4,
 };
 
 enum parse_opt_option_flags {
        PARSE_OPT_OPTARG  = 1,
        PARSE_OPT_NOARG   = 2,
+       PARSE_OPT_NONEG   = 4,
+       PARSE_OPT_HIDDEN  = 8,
+       PARSE_OPT_LASTARG_DEFAULT = 16,
 };
 
 struct option;
@@ -49,12 +61,17 @@ typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
  *   mask of parse_opt_option_flags.
  *   PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
  *   PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
+ *   PARSE_OPT_NONEG: says that this option cannot be negated
+ *   PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
+ *                    the long one.
  *
  * `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,SET_PTR} store the {mask,integer,pointer} to put in
+ *   the value when met.
  *   CALLBACKS can use it like they want.
  */
 struct option {
@@ -71,10 +88,17 @@ struct option {
 };
 
 #define OPT_END()                   { OPTION_END }
+#define OPT_ARGUMENT(l, h)          { OPTION_ARGUMENT, 0, (l), NULL, NULL, (h) }
 #define OPT_GROUP(h)                { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
+#define OPT_BIT(s, l, v, h, b)      { OPTION_BIT, (s), (l), (v), NULL, (h), 0, NULL, (b) }
 #define OPT_BOOLEAN(s, l, v, h)     { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) }
+#define OPT_SET_INT(s, l, v, h, i)  { OPTION_SET_INT, (s), (l), (v), NULL, (h), 0, NULL, (i) }
+#define OPT_SET_PTR(s, l, v, h, p)  { OPTION_SET_PTR, (s), (l), (v), NULL, (h), 0, NULL, (p) }
 #define OPT_INTEGER(s, l, v, h)     { OPTION_INTEGER, (s), (l), (v), NULL, (h) }
 #define OPT_STRING(s, l, v, a, h)   { OPTION_STRING,  (s), (l), (v), (a), (h) }
+#define OPT_DATE(s, l, v, h) \
+       { OPTION_CALLBACK, (s), (l), (v), "time",(h), 0, \
+         parse_opt_approxidate_cb }
 #define OPT_CALLBACK(s, l, v, a, h, f) \
        { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
 
@@ -89,8 +113,43 @@ extern int parse_options(int argc, const char **argv,
 extern NORETURN void usage_with_options(const char * const *usagestr,
                                         const struct option *options);
 
+/*----- incremantal advanced APIs -----*/
+
+enum {
+       PARSE_OPT_HELP = -1,
+       PARSE_OPT_DONE,
+       PARSE_OPT_UNKNOWN,
+};
+
+/*
+ * It's okay for the caller to consume argv/argc in the usual way.
+ * Other fields of that structure are private to parse-options and should not
+ * be modified in any way.
+ */
+struct parse_opt_ctx_t {
+       const char **argv;
+       const char **out;
+       int argc, cpidx;
+       const char *opt;
+       int flags;
+};
+
+extern int parse_options_usage(const char * const *usagestr,
+                              const struct option *opts);
+
+extern void parse_options_start(struct parse_opt_ctx_t *ctx,
+                               int argc, const char **argv, int flags);
+
+extern 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);
+
+
 /*----- some often used options -----*/
 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
+extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
 
 #define OPT__VERBOSE(var)  OPT_BOOLEAN('v', "verbose", (var), "be verbose")
 #define OPT__QUIET(var)    OPT_BOOLEAN('q', "quiet",   (var), "be quiet")
@@ -100,4 +159,6 @@ extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
          "use <n> digits to display SHA-1s", \
          PARSE_OPT_OPTARG, &parse_opt_abbrev_cb, 0 }
 
+extern const char *parse_options_fix_filename(const char *prefix, const char *file);
+
 #endif