#include "git-compat-util.h"
#include "parse-options.h"
+#include "cache.h"
#define OPT_SHORT 1
#define OPT_UNSET 2
-struct optparse_t {
- const char **argv;
- const char **out;
- int argc, cpidx;
- const char *opt;
-};
-
-static inline const char *get_arg(struct optparse_t *p)
-{
- if (p->opt) {
- const char *res = p->opt;
- p->opt = NULL;
- return res;
- }
- p->argc--;
- return *++p->argv;
-}
-
-static inline const char *skip_prefix(const char *str, const char *prefix)
-{
- size_t len = strlen(prefix);
- return strncmp(str, prefix, len) ? NULL : str + len;
-}
-
static int opterror(const struct option *opt, const char *reason, int flags)
{
if (flags & OPT_SHORT)
return error("option `%s' %s", opt->long_name, reason);
}
-static int get_value(struct optparse_t *p,
- const struct option *opt, int flags)
+static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
+ int flags, const char **arg)
+{
+ if (p->opt) {
+ *arg = p->opt;
+ p->opt = NULL;
+ } else if (p->argc == 1 && (opt->flags & PARSE_OPT_LASTARG_DEFAULT)) {
+ *arg = (const char *)opt->defval;
+ } else if (p->argc > 1) {
+ p->argc--;
+ *arg = *++p->argv;
+ } else
+ return opterror(opt, "requires a value", flags);
+ return 0;
+}
+
+static int get_value(struct parse_opt_ctx_t *p,
+ const struct option *opt, int flags)
{
const char *s, *arg;
const int unset = flags & OPT_UNSET;
}
}
- arg = p->opt ? p->opt : (p->argc > 1 ? p->argv[1] : NULL);
switch (opt->type) {
case OPTION_BIT:
if (unset)
return 0;
case OPTION_STRING:
- if (unset) {
+ if (unset)
*(const char **)opt->value = NULL;
- return 0;
- }
- if (opt->flags & PARSE_OPT_OPTARG && !p->opt) {
+ else if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
*(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);
+ else
+ return get_arg(p, opt, flags, (const char **)opt->value);
return 0;
case OPTION_CALLBACK:
if (unset)
- return (*opt->callback)(opt, NULL, 1);
+ return (*opt->callback)(opt, NULL, 1) ? (-1) : 0;
if (opt->flags & PARSE_OPT_NOARG)
- return (*opt->callback)(opt, NULL, 0);
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
if (opt->flags & PARSE_OPT_OPTARG && !p->opt)
- return (*opt->callback)(opt, NULL, 0);
- if (!arg)
- return opterror(opt, "requires a value", flags);
- return (*opt->callback)(opt, get_arg(p), 0);
+ return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
+ if (get_arg(p, opt, flags, &arg))
+ return -1;
+ return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
case OPTION_INTEGER:
if (unset) {
*(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 (get_arg(p, opt, flags, &arg))
+ return -1;
+ *(int *)opt->value = strtol(arg, (char **)&s, 10);
if (*s)
return opterror(opt, "expects a numerical value", flags);
return 0;
}
}
-static int parse_short_opt(struct optparse_t *p, const struct option *options)
+static int parse_short_opt(struct parse_opt_ctx_t *p, const struct option *options)
{
for (; options->type != OPTION_END; options++) {
if (options->short_name == *p->opt) {
return get_value(p, options, OPT_SHORT);
}
}
- return error("unknown switch `%c'", *p->opt);
+ return -2;
}
-static int parse_long_opt(struct optparse_t *p, const char *arg,
+static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
const struct option *options)
{
const char *arg_end = strchr(arg, '=');
abbrev_option->long_name);
if (abbrev_option)
return get_value(p, abbrev_option, abbrev_flags);
- return error("unknown option `%s'", arg);
+ return -2;
}
-void check_typos(const char *arg, const struct option *options)
+static void check_typos(const char *arg, const struct option *options)
{
if (strlen(arg) < 3)
return;
}
}
-static NORETURN void usage_with_options_internal(const char * const *,
- const struct option *, int);
+void parse_options_start(struct parse_opt_ctx_t *ctx,
+ int argc, const char **argv, int flags)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->argc = argc - 1;
+ ctx->argv = argv + 1;
+ ctx->out = argv;
+ ctx->cpidx = ((flags & PARSE_OPT_KEEP_ARGV0) != 0);
+ ctx->flags = flags;
+}
-int parse_options(int argc, const char **argv, const struct option *options,
- const char * const usagestr[], int flags)
+static int usage_with_options_internal(const char * const *,
+ const struct option *, int);
+
+int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[])
{
- struct optparse_t args = { argv + 1, argv, argc - 1, 0, NULL };
+ /* we must reset ->opt, unknown short option leave it dangling */
+ ctx->opt = NULL;
- for (; args.argc; args.argc--, args.argv++) {
- const char *arg = args.argv[0];
+ for (; ctx->argc; ctx->argc--, ctx->argv++) {
+ const char *arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
- if (flags & PARSE_OPT_STOP_AT_NON_OPTION)
+ if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
- args.out[args.cpidx++] = args.argv[0];
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
if (arg[1] != '-') {
- args.opt = arg + 1;
- if (*args.opt == 'h')
- usage_with_options(usagestr, options);
- if (parse_short_opt(&args, options) < 0)
- usage_with_options(usagestr, options);
- if (args.opt)
+ ctx->opt = arg + 1;
+ if (*ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ return PARSE_OPT_UNKNOWN;
+ }
+ if (ctx->opt)
check_typos(arg + 1, options);
- while (args.opt) {
- if (*args.opt == 'h')
- usage_with_options(usagestr, options);
- if (parse_short_opt(&args, options) < 0)
- usage_with_options(usagestr, options);
+ while (ctx->opt) {
+ if (*ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ switch (parse_short_opt(ctx, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ /* fake a short option thing to hide the fact that we may have
+ * started to parse aggregated stuff
+ *
+ * This is leaky, too bad.
+ */
+ ctx->argv[0] = xstrdup(ctx->opt - 1);
+ *(char *)ctx->argv[0] = '-';
+ return PARSE_OPT_UNKNOWN;
+ }
}
continue;
}
if (!arg[2]) { /* "--" */
- if (!(flags & PARSE_OPT_KEEP_DASHDASH)) {
- args.argc--;
- args.argv++;
+ if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
+ ctx->argc--;
+ ctx->argv++;
}
break;
}
if (!strcmp(arg + 2, "help-all"))
- usage_with_options_internal(usagestr, options, 1);
+ return usage_with_options_internal(usagestr, options, 1);
if (!strcmp(arg + 2, "help"))
- usage_with_options(usagestr, options);
- if (parse_long_opt(&args, arg + 2, options))
- usage_with_options(usagestr, options);
+ return parse_options_usage(usagestr, options);
+ switch (parse_long_opt(ctx, arg + 2, options)) {
+ case -1:
+ return parse_options_usage(usagestr, options);
+ case -2:
+ return PARSE_OPT_UNKNOWN;
+ }
}
+ return PARSE_OPT_DONE;
+}
- memmove(args.out + args.cpidx, args.argv, args.argc * sizeof(*args.out));
- args.out[args.cpidx + args.argc] = NULL;
- return args.cpidx + args.argc;
+int parse_options_end(struct parse_opt_ctx_t *ctx)
+{
+ memmove(ctx->out + ctx->cpidx, ctx->argv, ctx->argc * sizeof(*ctx->out));
+ ctx->out[ctx->cpidx + ctx->argc] = NULL;
+ return ctx->cpidx + ctx->argc;
+}
+
+int parse_options(int argc, const char **argv, const struct option *options,
+ const char * const usagestr[], int flags)
+{
+ struct parse_opt_ctx_t ctx;
+
+ parse_options_start(&ctx, argc, argv, flags);
+ switch (parse_options_step(&ctx, options, usagestr)) {
+ case PARSE_OPT_HELP:
+ exit(129);
+ case PARSE_OPT_DONE:
+ break;
+ default: /* PARSE_OPT_UNKNOWN */
+ if (ctx.argv[0][1] == '-') {
+ error("unknown option `%s'", ctx.argv[0] + 2);
+ } else {
+ error("unknown switch `%c'", *ctx.opt);
+ }
+ usage_with_options(usagestr, options);
+ }
+
+ return parse_options_end(&ctx);
}
#define USAGE_OPTS_WIDTH 24
#define USAGE_GAP 2
-void usage_with_options_internal(const char * const *usagestr,
- const struct option *opts, int full)
+int usage_with_options_internal(const char * const *usagestr,
+ const struct option *opts, int full)
{
fprintf(stderr, "usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
fprintf(stderr, " or: %s\n", *usagestr++);
- while (*usagestr)
- fprintf(stderr, " %s\n", *usagestr++);
+ while (*usagestr) {
+ fprintf(stderr, "%s%s\n",
+ **usagestr ? " " : "",
+ *usagestr);
+ usagestr++;
+ }
if (opts->type != OPTION_GROUP)
fputc('\n', stderr);
}
fputc('\n', stderr);
- exit(129);
+ return PARSE_OPT_HELP;
}
void usage_with_options(const char * const *usagestr,
- const struct option *opts)
+ const struct option *opts)
{
usage_with_options_internal(usagestr, opts, 0);
+ exit(129);
+}
+
+int parse_options_usage(const char * const *usagestr,
+ const struct option *opts)
+{
+ return usage_with_options_internal(usagestr, opts, 0);
}
+
/*----- some often used options -----*/
#include "cache.h"