splay: add unit tests

The test code that was #ifdef'ed in the code was converted into unit
tests in test case 1309. I also removed the #if 0'ed code from splay.c

tests/unit/Makefile.inc

@@ -6,7 +6,7 @@ UNITFILES = curlcheck.h \
 
 # These are all unit test programs
 UNITPROGS = unit1300 unit1301 unit1302 unit1303 unit1304 unit1305 unit1307 \
- unit1308
+ unit1308 unit1309
 
 unit1300_SOURCES = unit1300.c $(UNITFILES)
 unit1301_SOURCES = unit1301.c $(UNITFILES)
@@ -16,3 +16,4 @@ unit1304_SOURCES = unit1304.c $(UNITFILES)
 unit1305_SOURCES = unit1305.c $(UNITFILES)
 unit1307_SOURCES = unit1307.c $(UNITFILES)
 unit1308_SOURCES = unit1308.c $(UNITFILES)
+unit1309_SOURCES = unit1309.c $(UNITFILES)

tests/unit/unit1309.c

@@ -0,0 +1,113 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "curlcheck.h"
+
+#include "splay.h"
+
+
+static CURLcode unit_setup(void)
+{
+  return CURLE_OK;
+}
+
+static void unit_stop(void)
+{
+
+}
+
+static void splayprint(struct Curl_tree * t, int d, char output)
+{
+  struct Curl_tree *node;
+  int i;
+  int count;
+  if(t == NULL)
+    return;
+
+  splayprint(t->larger, d+1, output);
+  for(i=0; i<d; i++)
+    if(output)
+      printf("  ");
+
+  if(output) {
+    printf("%ld.%ld[%d]", (long)t->key.tv_sec,
+           (long)t->key.tv_usec, i);
+  }
+
+  for(count=0, node = t->same; node; node = node->same, count++)
+    ;
+
+  if(output) {
+    if(count)
+      printf(" [%d more]\n", count);
+    else
+      printf("\n");
+  }
+
+  splayprint(t->smaller, d+1, output);
+}
+
+UNITTEST_START
+
+/* number of nodes to add to the splay tree */
+#define NUM_NODES 50
+
+  struct Curl_tree *root, *t;
+  void *ptrs[NUM_NODES];
+  int rc;
+  int i;
+  root = NULL;              /* the empty tree */
+
+  for(i = 0; i < NUM_NODES; i++) {
+    struct timeval key;
+    ptrs[i] = t = malloc(sizeof(struct Curl_tree));
+    if(!t) {
+      puts("out of memory!");
+      return 0;
+    }
+
+    key.tv_sec = 0;
+    key.tv_usec = (541*i)%1023;
+
+    t->payload = (void *)key.tv_usec; /* for simplicity */
+    root = Curl_splayinsert(key, root, t);
+  }
+
+  puts("Result:");
+  splayprint(root, 0, 1);
+
+  for(i = 0; i < NUM_NODES; i++) {
+    int rem = (i+7)%NUM_NODES;
+    printf("Tree look:\n");
+    splayprint(root, 0, 1);
+    printf("remove pointer %d, payload %ld\n", rem,
+           (long)((struct Curl_tree *)ptrs[rem])->payload);
+    rc = Curl_splayremovebyaddr(root, (struct Curl_tree *)ptrs[rem], &root);
+    if(rc)
+      /* failed! */
+      printf("remove %d failed!\n", rem);
+  }
+
+UNITTEST_STOP
+
+
+
+