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-rw-r--r--parse-options.c91
-rw-r--r--parse-options.h4
2 files changed, 56 insertions, 39 deletions
diff --git a/parse-options.c b/parse-options.c
index 007b78e..04adf21 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -250,63 +250,78 @@ void parse_options_start(struct parse_opt_ctx_t *ctx,
ctx->flags = flags;
}
-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;
-}
-
static int usage_with_options_internal(const char * const *,
- const struct option *, int, int);
+ const struct option *, int);
-int parse_options(int argc, const char **argv, const struct option *options,
- const char * const usagestr[], int flags)
+int parse_options_step(struct parse_opt_ctx_t *ctx,
+ const struct option *options,
+ const char * const usagestr[])
{
- struct parse_opt_ctx_t ctx;
-
- parse_options_start(&ctx, argc, argv, flags);
- for (; ctx.argc; ctx.argc--, ctx.argv++) {
- const char *arg = ctx.argv[0];
+ for (; ctx->argc; ctx->argc--, ctx->argv++) {
+ const char *arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
- if (ctx.flags & PARSE_OPT_STOP_AT_NON_OPTION)
+ if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
- ctx.out[ctx.cpidx++] = ctx.argv[0];
+ ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
if (arg[1] != '-') {
- ctx.opt = arg + 1;
- if (*ctx.opt == 'h')
- usage_with_options(usagestr, options);
- if (parse_short_opt(&ctx, options) < 0)
+ ctx->opt = arg + 1;
+ if (*ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ if (parse_short_opt(ctx, options) < 0)
usage_with_options(usagestr, options);
- if (ctx.opt)
+ if (ctx->opt)
check_typos(arg + 1, options);
- while (ctx.opt) {
- if (*ctx.opt == 'h')
- usage_with_options(usagestr, options);
- if (parse_short_opt(&ctx, options) < 0)
+ while (ctx->opt) {
+ if (*ctx->opt == 'h')
+ return parse_options_usage(usagestr, options);
+ if (parse_short_opt(ctx, options) < 0)
usage_with_options(usagestr, options);
}
continue;
}
if (!arg[2]) { /* "--" */
- if (!(ctx.flags & PARSE_OPT_KEEP_DASHDASH)) {
- ctx.argc--;
- ctx.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, 1);
+ return usage_with_options_internal(usagestr, options, 1);
if (!strcmp(arg + 2, "help"))
+ return parse_options_usage(usagestr, options);
+ if (parse_long_opt(ctx, arg + 2, options))
usage_with_options(usagestr, options);
- if (parse_long_opt(&ctx, arg + 2, options))
- usage_with_options(usagestr, options);
+ }
+ return PARSE_OPT_DONE;
+}
+
+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 */
+ abort(); /* unreached yet */
}
return parse_options_end(&ctx);
@@ -316,7 +331,7 @@ int parse_options(int argc, const char **argv, const struct option *options,
#define USAGE_GAP 2
int usage_with_options_internal(const char * const *usagestr,
- const struct option *opts, int full, int do_exit)
+ const struct option *opts, int full)
{
fprintf(stderr, "usage: %s\n", *usagestr++);
while (*usagestr && **usagestr)
@@ -401,22 +416,20 @@ int usage_with_options_internal(const char * const *usagestr,
}
fputc('\n', stderr);
- if (do_exit)
- 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, 1);
- exit(129); /* make gcc happy */
+ 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, 0);
+ return usage_with_options_internal(usagestr, opts, 0);
}
diff --git a/parse-options.h b/parse-options.h
index f66ca35..33c683c 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -133,6 +133,10 @@ extern int parse_options_usage(const char * const *usagestr,
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);