Option parse_args( int argc, const char *argv[], const Options *options )
{
static int argn = 1;
static bool no_more_options = false;
static int first_nonopt = 1;
Option option = { NOT_OPTION, NULL, 0 };
option.argn = first_nonopt;
while (argn < argc)
{
size_t arg_len = strlen(argv[argn]);
if (!no_more_options &&
argv[argn][0] == '-' && // first char is '-'
arg_len > 1) // option is not "-"
{
option.argn = argn;
if (argv[argn][1] == '-') // string begins with "--"
{
if (arg_len == 2) // "--" alone indicates end of options
{
++argn;
no_more_options = true;
}
else
{
argn = parse_long_opt(argc, argv, options, &option);
}
}
else
{
argn = parse_short_opt(argc, argv, options, &option);
}
// shift option in front of non-options
permute(argv, &first_nonopt, &option.argn, argn);
// don't include "--" in non-options
if (no_more_options)
++option.argn;
break;
}
else
{
// skip non-options, permute later when option encountered
++argn;
}
}
return option;
}
void parse_args(int argc, char *argv[], cmd_data_t *cmd_data)
{
int a;
char *arg;
bool argused;
for (a=1; a < argc; a++) {
arg = argv[a];
argused = false;
if (arg[0] == '-') {
if (arg[1] == '-') {
argused = parse_long_opt(arg + 2, cmd_data);
} else if (arg[1] == 'o' && a+1 < argc) {
cmd_data->arglist[cmd_data->num_args++] = arg;
arg = argv[++a];
argused = parse_output_file_name(arg, cmd_data);
} else {
int num_used = parse_short_opt(arg + 1, cmd_data);
argused = num_used > 0;
if (num_used > 1) {
a += num_used - 1;
}
}
} else {
argused = parse_input_file_name(arg, cmd_data);
}
if (!argused) {
cmd_data->arglist[cmd_data->num_args++] = arg;
}
}
post_parse_fixup(cmd_data);
}
int parse_options_step(struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
/* we must reset ->opt, unknown short option leave it dangling */
ctx->opt = NULL;
for (; ctx->argc; ctx->argc--, ctx->argv++) {
const char *arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
if (parse_nodash_opt(ctx, arg, options) == 0)
continue;
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
return PARSE_OPT_NON_OPTION;
ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
if (arg[1] != '-') {
ctx->opt = arg + 1;
if (internal_help && *ctx->opt == 'h')
return parse_options_usage(ctx, usagestr, options, 0);
switch (parse_short_opt(ctx, options)) {
case -1:
return parse_options_usage(ctx, usagestr, options, 1);
case -2:
if (ctx->opt)
check_typos(arg + 1, options);
goto unknown;
}
if (ctx->opt)
check_typos(arg + 1, options);
while (ctx->opt) {
if (internal_help && *ctx->opt == 'h')
return parse_options_usage(ctx, usagestr, options, 0);
switch (parse_short_opt(ctx, options)) {
case -1:
return parse_options_usage(ctx, usagestr, options, 1);
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] = '-';
goto unknown;
}
}
continue;
}
if (!arg[2]) { /* "--" */
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
ctx->argc--;
ctx->argv++;
}
break;
}
if (internal_help && !strcmp(arg + 2, "help-all"))
return usage_with_options_internal(ctx, usagestr, options, 1, 0);
if (internal_help && !strcmp(arg + 2, "help"))
return parse_options_usage(ctx, usagestr, options, 0);
switch (parse_long_opt(ctx, arg + 2, options)) {
case -1:
return parse_options_usage(ctx, usagestr, options, 1);
case -2:
goto unknown;
}
continue;
unknown:
if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
return PARSE_OPT_UNKNOWN;
ctx->out[ctx->cpidx++] = ctx->argv[0];
ctx->opt = NULL;
}
return PARSE_OPT_DONE;
}
static int parse_options_step(struct parse_opt_ctx_t *ctx,
const struct option *options,
const char * const usagestr[])
{
int internal_help = !(ctx->flags & PARSE_OPT_NO_INTERNAL_HELP);
int excl_short_opt = 1;
const char *arg;
/* we must reset ->opt, unknown short option leave it dangling */
ctx->opt = NULL;
for (; ctx->argc; ctx->argc--, ctx->argv++) {
arg = ctx->argv[0];
if (*arg != '-' || !arg[1]) {
if (ctx->flags & PARSE_OPT_STOP_AT_NON_OPTION)
break;
ctx->out[ctx->cpidx++] = ctx->argv[0];
continue;
}
if (arg[1] != '-') {
ctx->opt = ++arg;
if (internal_help && *ctx->opt == 'h') {
return usage_with_options_internal(usagestr, options, 0, ctx);
}
switch (parse_short_opt(ctx, options)) {
case -1:
return parse_options_usage(usagestr, options, arg, 1);
case -2:
goto unknown;
case -3:
goto exclusive;
default:
break;
}
if (ctx->opt)
check_typos(arg, options);
while (ctx->opt) {
if (internal_help && *ctx->opt == 'h')
return usage_with_options_internal(usagestr, options, 0, ctx);
arg = ctx->opt;
switch (parse_short_opt(ctx, options)) {
case -1:
return parse_options_usage(usagestr, options, arg, 1);
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] = strdup(ctx->opt - 1);
*(char *)ctx->argv[0] = '-';
goto unknown;
case -3:
goto exclusive;
default:
break;
}
}
continue;
}
if (!arg[2]) { /* "--" */
if (!(ctx->flags & PARSE_OPT_KEEP_DASHDASH)) {
ctx->argc--;
ctx->argv++;
}
break;
}
arg += 2;
if (internal_help && !strcmp(arg, "help-all"))
return usage_with_options_internal(usagestr, options, 1, ctx);
if (internal_help && !strcmp(arg, "help"))
return usage_with_options_internal(usagestr, options, 0, ctx);
if (!strcmp(arg, "list-opts"))
return PARSE_OPT_LIST_OPTS;
if (!strcmp(arg, "list-cmds"))
return PARSE_OPT_LIST_SUBCMDS;
switch (parse_long_opt(ctx, arg, options)) {
case -1:
return parse_options_usage(usagestr, options, arg, 0);
case -2:
goto unknown;
case -3:
excl_short_opt = 0;
goto exclusive;
default:
break;
}
continue;
unknown:
if (!(ctx->flags & PARSE_OPT_KEEP_UNKNOWN))
return PARSE_OPT_UNKNOWN;
ctx->out[ctx->cpidx++] = ctx->argv[0];
ctx->opt = NULL;
}
return PARSE_OPT_DONE;
exclusive:
parse_options_usage(usagestr, options, arg, excl_short_opt);
if ((excl_short_opt && ctx->excl_opt->short_name) ||
ctx->excl_opt->long_name == NULL) {
char opt = ctx->excl_opt->short_name;
parse_options_usage(NULL, options, &opt, 1);
} else {
parse_options_usage(NULL, options, ctx->excl_opt->long_name, 0);
}
return PARSE_OPT_HELP;
}
