- Add libmysql to the tree

1 files changed, 100 insertions, 0 deletions

diff --git a/ext/mysql/libmysql/list.c b/ext/mysql/libmysql/list.c
new file mode 100644
index 0000000000..f39ac7e3e3
--- /dev/null
+++ b/ext/mysql/libmysql/list.c
@@ -0,0 +1,100 @@
+/* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
+   This file is public domain and comes with NO WARRANTY of any kind */
+
+/*
+  Code for handling dubble-linked lists in C
+*/
+
+#include "mysys_priv.h"
+#include <my_list.h>
+
+
+
+	/* Add a element to start of list */
+
+LIST *list_add(LIST *root, LIST *element)
+{
+  if (root)
+  {
+    if (root->prev)			/* If add in mid of list */
+      root->prev->next= element;
+    element->prev=root->prev;
+    root->prev=element;
+  }
+  else
+    element->prev=0;
+  element->next=root;
+  return element;			/* New root */
+}
+
+
+LIST *list_delete(LIST *root, LIST *element)
+{
+  if (element->prev)
+    element->prev->next=element->next;
+  else
+    root=element->next;
+  if (element->next)
+    element->next->prev=element->prev;
+  return root;
+}
+
+
+void list_free(LIST *root, pbool free_data)
+{
+  LIST *next;
+  while (root)
+  {
+    next=root->next;
+    if (free_data)
+      my_free((gptr) root->data,MYF(0));
+    my_free((gptr) root,MYF(0));
+    root=next;
+  }
+}
+
+
+LIST *list_cons(void *data, LIST *list)
+{
+  LIST *new=(LIST*) my_malloc(sizeof(LIST),MYF(MY_FAE));
+  if (!new)
+    return 0;
+  new->data=data;
+  return list_add(list,new);
+}
+
+
+LIST *list_reverse(LIST *root)
+{
+  LIST *last;
+
+  last=root;
+  while (root)
+  {
+    last=root;
+    root=root->next;
+    last->next=last->prev;
+    last->prev=root;
+  }
+  return last;
+}
+
+uint list_length(LIST *list)
+{
+  uint count;
+  for (count=0 ; list ; list=list->next, count++) ;
+  return count;
+}
+
+
+int list_walk(LIST *list, list_walk_action action, gptr argument)
+{
+  int error=0;
+  while (list)
+  {
+    if ((error = (*action)(list->data,argument)))
+      return error;
+    list=rest(list);
+  }
+  return 0;
+}