fix optind in the windows getopt. addresses #1747

git-svn-id: file:///svn/toku/tokudb@11784 c7de825b-a66e-492c-adef-691d508d4ae1

windows/getopt.c

+#include <stdio.h>
 #include <unistd.h>
 
 char *optarg;
@@ -16,32 +17,44 @@ int getopt(int argc, char * const argv[], const char *optstring) {
     static int nextchar = 0;
     char *arg;
     const char *theopt;
+
+    // first time initialization
     if (nextargc == 0) {
         nextargc = 1;
         optind = 1;
         nextchar = 0;
     }
+
 again:
     optarg = 0;
-    if (nextargc >= argc) {
-        nextargc = 0;
+    optind = nextargc;
+    // last arg
+    if (nextargc >= argc)
         return -1;
-    }
+
     arg = argv[nextargc];
+    if (!arg[nextchar]) {
+        nextargc++;
+        nextchar = 0;
+        goto again;
+    }
     if (!nextchar) {
-        arg = argv[nextargc];
-        if (arg[0] != '-') {
-            nextargc = 0;
+        // not an option
+        if (arg[0] != '-')
+            return -1;
+        // end of options "--"
+        if (arg[1] == '-') {
+            nextargc++;
+            optind = nextargc;
             return -1;
         }
         nextchar = 1;
     }
+    // try to match the arg with the options
     theopt = match(arg[nextchar++], optstring);
-    if (!theopt) {
-        nextargc++;
-        nextchar = 0;
-        goto again;
-    }
+    if (!theopt)
+        return '?';
+
     if (theopt[1] == ':') {
         if (arg[nextchar]) {
             optarg = &arg[nextchar];
@@ -57,7 +70,6 @@ again:
             optarg = argv[nextargc++];
         }
     }
-    optind = nextargc;
     return theopt[0];
 }