1 #include "git-compat-util.h"
2 #include "parse-options.h"
14 static inline const char *get_arg(struct optparse_t *p)
17 const char *res = p->opt;
25 static inline const char *skip_prefix(const char *str, const char *prefix)
27 size_t len = strlen(prefix);
28 return strncmp(str, prefix, len) ? NULL : str + len;
31 static int opterror(const struct option *opt, const char *reason, int flags)
33 if (flags & OPT_SHORT)
34 return error("switch `%c' %s", opt->short_name, reason);
35 if (flags & OPT_UNSET)
36 return error("option `no-%s' %s", opt->long_name, reason);
37 return error("option `%s' %s", opt->long_name, reason);
40 static int get_value(struct optparse_t *p,
41 const struct option *opt, int flags)
45 if (p->opt && (flags & OPT_UNSET))
46 return opterror(opt, "takes no value", flags);
50 if (!(flags & OPT_SHORT) && p->opt)
51 return opterror(opt, "takes no value", flags);
52 if (flags & OPT_UNSET)
53 *(int *)opt->value = 0;
55 (*(int *)opt->value)++;
59 if (flags & OPT_UNSET) {
60 *(const char **)opt->value = (const char *)NULL;
63 if (!p->opt && p->argc <= 1)
64 return opterror(opt, "requires a value", flags);
65 *(const char **)opt->value = get_arg(p);
69 if (flags & OPT_UNSET) {
70 *(int *)opt->value = 0;
73 if (!p->opt && p->argc <= 1)
74 return opterror(opt, "requires a value", flags);
75 *(int *)opt->value = strtol(get_arg(p), (char **)&s, 10);
77 return opterror(opt, "expects a numerical value", flags);
81 die("should not happen, someone must be hit on the forehead");
85 static int parse_short_opt(struct optparse_t *p, const struct option *options)
87 for (; options->type != OPTION_END; options++) {
88 if (options->short_name == *p->opt) {
89 p->opt = p->opt[1] ? p->opt + 1 : NULL;
90 return get_value(p, options, OPT_SHORT);
93 return error("unknown switch `%c'", *p->opt);
96 static int parse_long_opt(struct optparse_t *p, const char *arg,
97 const struct option *options)
99 for (; options->type != OPTION_END; options++) {
103 if (!options->long_name)
106 rest = skip_prefix(arg, options->long_name);
108 if (strncmp(arg, "no-", 3))
111 rest = skip_prefix(arg + 3, options->long_name);
120 return get_value(p, options, flags);
122 return error("unknown option `%s'", arg);
125 int parse_options(int argc, const char **argv, const struct option *options,
126 const char *usagestr, int flags)
128 struct optparse_t args = { argv + 1, argc - 1, NULL };
131 for (; args.argc; args.argc--, args.argv++) {
132 const char *arg = args.argv[0];
134 if (*arg != '-' || !arg[1]) {
135 argv[j++] = args.argv[0];
142 if (*args.opt == 'h')
144 if (parse_short_opt(&args, options) < 0)
150 if (!arg[2]) { /* "--" */
151 if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
158 if (!strcmp(arg + 2, "help"))
160 if (parse_long_opt(&args, arg + 2, options))
164 memmove(argv + j, args.argv, args.argc * sizeof(*argv));
165 argv[j + args.argc] = NULL;
166 return j + args.argc;