Merge commit 'upstream/4.6.1'

[debian/atlc] / src / get_options.c

diff --git a/src/get_options.c b/src/get_options.c
new file mode 100644 (file)
index 0000000..e58ce9a
--- /dev/null
+++ b/src/get_options.c
@@ -0,0 +1,141 @@
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers. 
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either package_version 2
+of the License, or (at your option) any later package_version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+USA.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com 
+
+*/
+
+
+/*
+ * Here's something you've all been waiting for:  the AT&T public domain
+ * source for getopt(3).  It is the code which was given out at the 1985
+ * UNIFORUM conference in Dallas.  I obtained it by electronic mail
+ * directly from AT&T.  The people there assure me that it is indeed
+ * in the public domain.
+ * 
+ * There is no manual page.  That is because the one they gave out at
+ * UNIFORUM was slightly different from the current System V Release 2
+ * manual page.  The difference apparently involved a note about the
+ * famous rules 5 and 6, recommending using white space between an option
+ * and its first argument, and not grouping options that have arguments.
+ * Getopt itself is currently lenient about both of these things White
+ * space is allowed, but not mandatory, and the last option in a group can
+ * have an argument.  That particular package_version of the man page evidently
+ * has no official existence, and my source at AT&T did not send a copy.
+ * The current SVR2 man page reflects the actual behavor of this getopt.
+ * However, I am not about to post a copy of anything licensed by AT&T.
+ */
+
+#include "config.h"
+
+#include "definitions.h"
+
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+/*LINTLIBRARY*/
+#ifndef NULL
+#define NULL    0
+#endif
+#define EOF     (-1)
+
+
+int     my_opterr = 1;
+int     my_optind = 1;
+int     my_optopt;
+char    *my_optarg;
+
+void ERR(const char *s, char c, char **argv)  
+{
+       if(my_opterr)
+       {
+               char errbuf[2];
+               errbuf[0] = c;
+               errbuf[1] = '\n';
+               /* (void) write(2, argv[0], (unsigned)strlen(argv[0]));
+               (void) write(2, s, (unsigned)strlen(s));
+               (void) write(2, errbuf, 2); */
+               (void) fwrite(argv[0], (unsigned)strlen(argv[0]),1,stderr);
+               (void) fwrite(s, (unsigned)strlen(s),1,stderr);
+               (void) fwrite(errbuf, 2, 1,stderr); 
+       }
+}
+
+char *index2(const char *str, char c)
+{
+       char *ret;
+       ret=strchr((char *) str,c);
+       return(ret);
+}
+
+
+int get_options(int argc, char **argv, const char *opts)
+{
+       static int sp = 1;
+       /* register int c;
+        register char *cp; */
+        int c;
+        char tmp;
+       char *cp;
+        cp=&tmp;
+
+       if(sp == 1)
+       {
+               if(my_optind >= argc ||
+                  argv[my_optind][0] != '-' || argv[my_optind][1] == '\0')
+                       return(EOF);
+               else if(strcmp(argv[my_optind], "--") == 0) {
+                       my_optind++;
+                       return(EOF);
+               }
+        }
+       my_optopt = c = argv[my_optind][sp];
+       if(c == ':' || (cp=index2((char *) opts, c)) == NULL) {
+               ERR(": illegal option -- ", c,argv);
+               if(argv[my_optind][++sp] == '\0') {
+                       my_optind++;
+                       sp = 1;
+               }
+               return('?');
+       }
+       if(*++cp == ':') {
+               if(argv[my_optind][sp+1] != '\0')
+                       my_optarg = &argv[my_optind++][sp+1];
+               else if(++my_optind >= argc) {
+                       ERR(": option requires an argument -- ", c,argv);
+                       sp = 1;
+                       return('?');
+               } else
+                       my_optarg = argv[my_optind++];
+               sp = 1;
+       } else {
+               if(argv[my_optind][++sp] == '\0') {
+                       sp = 1;
+                       my_optind++;
+               }
+               my_optarg = NULL;
+       }
+       return(c);
+}