libc: Add qsort()

libc/include/stdlib.h

@@ -115,7 +115,9 @@ extern "C"
     /* Clear all environment variables. */
     int clearenv(void);
 
-    void qsort(void*, size_t, size_t, int (*)(const void*, const void*));
+    /* Sort an array of arbitrary elements using a comparison function. */
+    void qsort(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*));
+
     void* bsearch(const void*, const void*, size_t, size_t, int (*)(const void*, const void*));
 
     /* Convert a multibyte character string to a wide character string. */

libc/src/stdlib.cpp

@@ -2,6 +2,7 @@
 #include <limits.h>
 #include <luna/Heap.h>
 #include <luna/NumberParsing.h>
+#include <luna/Sort.h>
 #include <luna/Utf8.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
@@ -199,4 +200,9 @@ extern "C"
 
         return status;
     }
+
+    void qsort(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*))
+    {
+        c_quicksort(base, nmemb, size, compar);
+    }
 }