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//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <stdlib.h>
#include <string.h>
#include <nng/nng.h>
#include <nng/supplemental/util/options.h>
#include "core/nng_impl.h"
// Call with optidx set to 1 to start parsing.
int
nng_opts_parse(int argc, char *const *argv, const nng_optspec *opts, int *val,
char **optarg, int *optidx)
{
const nng_optspec *opt;
int matches;
bool shortopt;
size_t l;
char * arg;
int i;
if ((i = *optidx) >= argc) {
return (-1);
}
arg = argv[*optidx];
if (arg[0] != '-') {
return (-1);
}
if (arg[1] == '\0') {
*optidx = i + 1;
return (-1);
}
if ((arg[0] == '-') && (arg[1] == '-')) {
arg += 2;
shortopt = false;
for (l = 0; arg[l] != '\0'; l++) {
if ((arg[l] == '=') || (arg[l] == ':')) {
break;
}
}
} else {
arg++;
shortopt = true;
l = 1;
}
matches = 0;
opt = NULL;
for (int x = 0; opts[x].o_val != 0; x++) {
if (shortopt) {
if (arg[0] == opts[x].o_short) {
matches = 1;
opt = &opts[x];
break;
}
continue;
}
if ((opts[x].o_name == NULL) ||
(strncmp(arg, opts[x].o_name, l) != 0)) {
continue;
}
matches++;
opt = &opts[x];
if (strlen(opts[x].o_name) == l) {
// Perfect match.
matches = 1;
break;
}
}
switch (matches) {
case 1:
// Exact match
break;
case 0:
// No such option
return (NNG_EINVAL);
break;
default:
// Ambiguous (not match)
return (NNG_EAMBIGUOUS);
break;
}
if (!opt->o_arg) {
// No option clustering for short options yet.
if (arg[l] != '\0') {
return (NNG_EINVAL);
}
*val = opt->o_val;
*optidx = i + 1;
return (0);
}
if (arg[l] != '\0') {
if (shortopt) {
*optarg = arg + l;
} else {
*optarg = arg + l + 1;
}
} else {
i++;
if (i >= argc) {
return (NNG_ENOARG);
}
*optarg = argv[i];
}
*optidx = ++i;
*val = opt->o_val;
return (0);
}
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