args: Convert nng_opts_parse into a header only library using `nng_args_parse`.

The API is identical, except that some names have changed, and this is now a
header library in `nng/args.h` - so the core library does not need to carry this
code in binaries.  Being a header library also means it is not necessary to
link against NNG, and it does not include any parts of NNG; it only depends on
a standard C99 or C11 environment.

1 files changed, 0 insertions, 127 deletions

diff --git a/src/supplemental/util/options.c b/src/supplemental/util/options.c
deleted file mode 100644
index 961e0bb2..00000000
--- a/src/supplemental/util/options.c
+++ /dev/null
@@ -1,127 +0,0 @@
-//
-// 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);
-}