Andrew's git - gitweb.git/blob

   1#ifndef PARSE_OPTIONS_H
   2#define PARSE_OPTIONS_H
   3
   4enum parse_opt_type {
   5        OPTION_END,
   6        OPTION_GROUP,
   7        OPTION_BOOLEAN,
   8        OPTION_STRING,
   9        OPTION_INTEGER,
  10        OPTION_CALLBACK,
  11};
  12
  13enum parse_opt_flags {
  14        PARSE_OPT_KEEP_DASHDASH = 1,
  15};
  16
  17enum parse_opt_option_flags {
  18        PARSE_OPT_OPTARG  = 1,
  19};
  20
  21struct option;
  22typedef int parse_opt_cb(const struct option *, const char *arg, int unset);
  23
  24struct option {
  25        enum parse_opt_type type;
  26        int short_name;
  27        const char *long_name;
  28        void *value;
  29        const char *argh;
  30        const char *help;
  31
  32        int flags;
  33        parse_opt_cb *callback;
  34        /* holds default value for PARSE_OPT_OPTARG,
  35           though callbacks can use it like they want */
  36        intptr_t defval;
  37};
  38
  39#define OPT_END()                   { OPTION_END }
  40#define OPT_GROUP(h)                { OPTION_GROUP, 0, NULL, NULL, NULL, (h) }
  41#define OPT_BOOLEAN(s, l, v, h)     { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) }
  42#define OPT_INTEGER(s, l, v, h)     { OPTION_INTEGER, (s), (l), (v), NULL, (h) }
  43#define OPT_STRING(s, l, v, a, h)   { OPTION_STRING,  (s), (l), (v), (a), (h) }
  44#define OPT_CALLBACK(s, l, v, a, h, f) \
  45        { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) }
  46
  47/* parse_options() will filter out the processed options and leave the
  48 * non-option argments in argv[].
  49 * Returns the number of arguments left in argv[].
  50 */
  51extern int parse_options(int argc, const char **argv,
  52                         const struct option *options,
  53                         const char * const usagestr[], int flags);
  54
  55extern NORETURN void usage_with_options(const char * const *usagestr,
  56                                        const struct option *options);
  57
  58#endif