From 45847c5324eed901b35081cd01e024aa519ca7b4 Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Thu, 12 Apr 2007 16:53:59 +0000
Subject: [PATCH] Add file ares_getopt.c
Original file name getopt.c Initial import into the c-ares source tree
on 2007-04-11. Lifted from version 5.2 of the 'Open Mash' project with
the modified BSD license, BSD license without the advertising clause.
---
ares/ares_getopt.c | 130 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 130 insertions(+)
create mode 100644 ares/ares_getopt.c
diff --git a/ares/ares_getopt.c b/ares/ares_getopt.c
new file mode 100644
index 0000000000..3ed40cd33e
--- /dev/null
+++ b/ares/ares_getopt.c
@@ -0,0 +1,130 @@
+/*
+ * Original file name getopt.c Initial import into the c-ares source tree
+ * on 2007-04-11. Lifted from version 5.2 of the 'Open Mash' project with
+ * the modified BSD license, BSD license without the advertising clause.
+ *
+ * $Id$
+ */
+
+/*
+ * getopt.c --
+ *
+ * Standard UNIX getopt function. Code is from BSD.
+ *
+ * Copyright (c) 1987-2001 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * A. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * B. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * C. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
+ * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* #if !defined(lint)
+ * static char sccsid[] = "@(#)getopt.c 8.2 (Berkeley) 4/2/94";
+ * #endif
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* declarations to provide consistent linkage */
+extern char *optarg;
+extern int optind;
+extern int opterr;
+
+int opterr = 1, /* if error message should be printed */
+ optind = 1, /* index into parent argv vector */
+ optopt, /* character checked for validity */
+ optreset; /* reset getopt */
+char *optarg; /* argument associated with option */
+
+#define BADCH (int)'?'
+#define BADARG (int)':'
+#define EMSG ""
+
+/*
+ * getopt --
+ * Parse argc/argv argument vector.
+ */
+int
+getopt(nargc, nargv, ostr)
+ int nargc;
+ char * const *nargv;
+ const char *ostr;
+{
+ static char *place = EMSG; /* option letter processing */
+ char *oli; /* option letter list index */
+
+ if (optreset || !*place) { /* update scanning pointer */
+ optreset = 0;
+ if (optind >= nargc || *(place = nargv[optind]) != '-') {
+ place = EMSG;
+ return (EOF);
+ }
+ if (place[1] && *++place == '-') { /* found "--" */
+ ++optind;
+ place = EMSG;
+ return (EOF);
+ }
+ } /* option letter okay? */
+ if ((optopt = (int)*place++) == (int)':' ||
+ !(oli = strchr(ostr, optopt))) {
+ /*
+ * if the user didn't specify '-' as an option,
+ * assume it means EOF.
+ */
+ if (optopt == (int)'-')
+ return (EOF);
+ if (!*place)
+ ++optind;
+ if (opterr && *ostr != ':')
+ (void)fprintf(stderr,
+ "%s: illegal option -- %c\n", __FILE__, optopt);
+ return (BADCH);
+ }
+ if (*++oli != ':') { /* don't need argument */
+ optarg = NULL;
+ if (!*place)
+ ++optind;
+ }
+ else { /* need an argument */
+ if (*place) /* no white space */
+ optarg = place;
+ else if (nargc <= ++optind) { /* no arg */
+ place = EMSG;
+ if (*ostr == ':')
+ return (BADARG);
+ if (opterr)
+ (void)fprintf(stderr,
+ "%s: option requires an argument -- %c\n",
+ __FILE__, optopt);
+ return (BADCH);
+ }
+ else /* white space */
+ optarg = nargv[optind];
+ place = EMSG;
+ ++optind;
+ }
+ return (optopt); /* dump back option letter */
+}
--
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