Handle empty strings correctly.

[gnulib.git] / lib / uninorm / u-normalize-internal.h

diff --git a/lib/uninorm/u-normalize-internal.h b/lib/uninorm/u-normalize-internal.h
index 7dc83ad..70c3255 100644 (file)
--- a/lib/uninorm/u-normalize-internal.h
+++ b/lib/uninorm/u-normalize-internal.h
@@ -331,6 +331,29 @@ FUNC (uninorm_t nf, const UNIT *s, size_t n,
       }
   }
 
+  if (length == 0)
+    {
+      if (result == NULL)
+       {
+         /* Return a non-NULL value.  NULL means error.  */
+         result = (UNIT *) malloc (1);
+         if (result == NULL)
+           {
+             errno = ENOMEM;
+             goto fail;
+           }
+       }
+    }
+  else if (result != resultbuf && length < allocated)
+    {
+      /* Shrink the allocated memory if possible.  */
+      UNIT *memory;
+
+      memory = (UNIT *) realloc (result, length * sizeof (UNIT));
+      if (memory != NULL)
+       result = memory;
+    }
+
   if (sortbuf_count > 0)
     abort ();
   if (sortbuf != sortbuf_preallocated)