Added linked list example.

icculus · Aug 7, 2008 · 8569ac0 · 8569ac0
1 parent 42e422c
commit 8569ac0
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diff --git a/.hgignore b/.hgignore
@@ -5,4 +5,5 @@ dataplugin_tests/hello/hello
 dataplugin_tests/wchar_t/wchar32
 dataplugin_tests/wchar_t/wchar16
 dataplugin_tests/std_str/stdstr
+dataplugin_tests/linkedlist/linkedlist
 
diff --git a/dataplugin_tests/linked_list/Makefile b/dataplugin_tests/linked_list/Makefile
@@ -0,0 +1,14 @@
+all: viewlinkedlist.so linkedlist
+
+.PHONY: clean
+clean:
+	rm -f linkedlist viewlinkedlist.so
+
+linkedlist: linkedlist.cpp
+	g++ -o linkedlist -Wall -O0 -g linkedlist.cpp
+
+viewlinkedlist.so: viewlinkedlist.cpp
+	g++ -o viewlinkedlist.so -shared -fPIC -Wall -O0 -g viewlinkedlist.cpp -I../../src/gdb
+
+# end of Makefile ...
+
diff --git a/dataplugin_tests/linked_list/linkedlist.cpp b/dataplugin_tests/linked_list/linkedlist.cpp
@@ -0,0 +1,39 @@
+#include <string.h>
+#include "linkedlist.h"
+
+static LinkedList *list = NULL;
+
+static char *xstrdup(const char *str)
+{
+    const size_t len = strlen(str);
+    char *retval = new char[len+1];
+    strcpy(retval, str);
+    return retval;
+}
+
+static void AddToList(const char *first, const char *last, int office)
+{
+    LinkedList *item = new LinkedList;
+    item->first = xstrdup(first);
+    item->last = xstrdup(last);
+    item->office_number = office;
+    item->next = list;
+    list = item;
+}
+
+int main(void)
+{
+    AddToList("Ryan", "Gordon", 4923);
+    AddToList("Greg", "Read", 227);
+    AddToList("Linus", "Torvalds", 732);
+    AddToList("Bill", "Gates", 666);  // I kid! I kid!
+    AddToList("Richard", "Stallman", 1135);
+    AddToList("Andrew", "Tannenbaum", 9986);
+
+    // now leak all that memory.  :)
+    return 0;
+}
+
+/* end of linkedlist.cpp ... */
+
+
diff --git a/dataplugin_tests/linked_list/linkedlist.h b/dataplugin_tests/linked_list/linkedlist.h
@@ -0,0 +1,16 @@
+#ifndef _INCL_LINKEDLIST_H_
+#define _INCL_LINKEDLIST_H_
+
+class LinkedList
+{
+public:
+    const char *first;
+    const char *last;
+    int office_number;
+    LinkedList *next;
+};
+
+#endif
+
+/* end of linkedlist.h ... */
+
diff --git a/dataplugin_tests/linked_list/viewlinkedlist.cpp b/dataplugin_tests/linked_list/viewlinkedlist.cpp
@@ -0,0 +1,38 @@
+
+#include "linkedlist.h"
+#include "gdb-dataplugins.h"
+
+static void view_linkedlist(const void *ptr, const GDB_dataplugin_funcs *funcs)
+{
+    LinkedList item;
+
+    while (ptr)
+    {
+        if (funcs->readmem(ptr, &item, sizeof (item)) != 0)
+            return;
+
+        char *first = (char *) funcs->readstr(item.first, sizeof (char));
+        if (first)
+        {
+            char *last = (char *) funcs->readstr(item.last, sizeof (char));
+            if (last)
+            {
+                funcs->print("item (%p) { \"%s\", \"%s\", %d }%s\n",
+                              ptr, first, last, item.office_number,
+                              item.next ? "," : "");
+                funcs->freemem(last);
+            }
+            funcs->freemem(first);
+        }
+
+        ptr = item.next;
+    }
+}
+
+void GDB_DATAPLUGIN_ENTRY(const GDB_dataplugin_entry_funcs *funcs)
+{
+    funcs->register_viewer("LinkedList", view_linkedlist);
+}
+
+/* end of viewlinkedlist.cpp ... */
+