Add function to find a needle in a string array

Signed-off-by: NStefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: NCorey Bryant <coreyb@linux.vnet.ibm.com>
Tested-by: NCorey Bryant <coreyb@linux.vnet.ibm.com>

src/libvirt_private.syms

@@ -1723,6 +1723,7 @@ virStorageFileResize;
 
 
 # util/virstring.h
+virStringArrayHasString;
 virStringFreeList;
 virStringJoin;
 virStringSplit;

src/util/virstring.c

@@ -166,3 +166,17 @@ void virStringFreeList(char **strings)
     }
     VIR_FREE(strings);
 }
+
+
+bool
+virStringArrayHasString(char **strings, const char *needle)
+{
+    size_t i = 0;
+
+    while (strings[i]) {
+        if (STREQ(strings[i++], needle))
+            return true;
+    }
+
+    return false;
+}

src/util/virstring.h

@@ -35,4 +35,6 @@ char *virStringJoin(const char **strings,
 
 void virStringFreeList(char **strings);
 
+bool virStringArrayHasString(char **strings, const char *needle);
+
 #endif /* __VIR_STRING_H__ */