diff options
| -rw-r--r-- | parse-options.c | 45 | ||||
| -rw-r--r-- | parse-options.h | 16 |
2 files changed, 53 insertions, 8 deletions
diff --git a/parse-options.c b/parse-options.c index 89c5f52be..c751ebf60 100644 --- a/parse-options.c +++ b/parse-options.c @@ -39,7 +39,8 @@ static int opterror(const struct option *opt, const char *reason, int flags) static int get_value(struct optparse_t *p, const struct option *opt, int flags) { - const char *s; + const char *s, *arg; + arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL); if (p->opt && (flags & OPT_UNSET)) return opterror(opt, "takes no value", flags); @@ -59,17 +60,34 @@ static int get_value(struct optparse_t *p, *(const char **)opt->value = (const char *)NULL; return 0; } - if (!p->opt && p->argc <= 1) + if (opt->flags & PARSE_OPT_OPTARG && (!arg || *arg == '-')) { + *(const char **)opt->value = (const char *)opt->defval; + return 0; + } + if (!arg) return opterror(opt, "requires a value", flags); *(const char **)opt->value = get_arg(p); return 0; + case OPTION_CALLBACK: + if (flags & OPT_UNSET) + return (*opt->callback)(opt, NULL, 1); + if (opt->flags & PARSE_OPT_OPTARG && (!arg || *arg == '-')) + return (*opt->callback)(opt, NULL, 0); + if (!arg) + return opterror(opt, "requires a value", flags); + return (*opt->callback)(opt, get_arg(p), 0); + case OPTION_INTEGER: if (flags & OPT_UNSET) { *(int *)opt->value = 0; return 0; } - if (!p->opt && p->argc <= 1) + if (opt->flags & PARSE_OPT_OPTARG && (!arg || !isdigit(*arg))) { + *(int *)opt->value = opt->defval; + return 0; + } + if (!arg) return opterror(opt, "requires a value", flags); *(int *)opt->value = strtol(get_arg(p), (char **)&s, 10); if (*s) @@ -201,13 +219,24 @@ void usage_with_options(const char * const *usagestr, switch (opts->type) { case OPTION_INTEGER: - pos += fprintf(stderr, " <n>"); + if (opts->flags & PARSE_OPT_OPTARG) + pos += fprintf(stderr, " [<n>]"); + else + pos += fprintf(stderr, " <n>"); break; case OPTION_STRING: - if (opts->argh) - pos += fprintf(stderr, " <%s>", opts->argh); - else - pos += fprintf(stderr, " ..."); + case OPTION_CALLBACK: + if (opts->argh) { + if (opts->flags & PARSE_OPT_OPTARG) + pos += fprintf(stderr, " [<%s>]", opts->argh); + else + pos += fprintf(stderr, " <%s>", opts->argh); + } else { + if (opts->flags & PARSE_OPT_OPTARG) + pos += fprintf(stderr, " [...]"); + else + pos += fprintf(stderr, " ..."); + } break; default: break; diff --git a/parse-options.h b/parse-options.h index 3006a769c..2b8e7624d 100644 --- a/parse-options.h +++ b/parse-options.h @@ -7,12 +7,20 @@ enum parse_opt_type { OPTION_BOOLEAN, OPTION_STRING, OPTION_INTEGER, + OPTION_CALLBACK, }; enum parse_opt_flags { PARSE_OPT_KEEP_DASHDASH = 1, }; +enum parse_opt_option_flags { + PARSE_OPT_OPTARG = 1, +}; + +struct option; +typedef int parse_opt_cb(const struct option *, const char *arg, int unset); + struct option { enum parse_opt_type type; int short_name; @@ -20,6 +28,12 @@ struct option { void *value; const char *argh; const char *help; + + int flags; + parse_opt_cb *callback; + /* holds default value for PARSE_OPT_OPTARG, + though callbacks can use it like they want */ + intptr_t defval; }; #define OPT_END() { OPTION_END } @@ -27,6 +41,8 @@ struct option { #define OPT_BOOLEAN(s, l, v, h) { OPTION_BOOLEAN, (s), (l), (v), NULL, (h) } #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_CALLBACK(s, l, v, a, h, f) \ + { OPTION_CALLBACK, (s), (l), (v), (a), (h), 0, (f) } /* parse_options() will filter out the processed options and leave the * non-option argments in argv[]. |