Adding basic Database structure.

1 files changed, 47 insertions, 0 deletions

diff --git a/Database/internals/database-references.cpp b/Database/internals/database-references.cpp
new file mode 100644
index 0000000..8520f16
--- /dev/null
+++ b/Database/internals/database-references.cpp
@@ -0,0 +1,47 @@
+#include "database-references.h"

+

+RefFrom::RefFrom(RefTo * refTo, SegmentRefData * data) : refTo(refTo), data(data) {

+    assert(refto);

+    assert(data);

+    

+    next = data->getRefFrom();

+    prev = 0;

+    data->firstRefFrom = this;

+    if (next)

+        next->prev = this;

+}

+

+RefFrom::~RefFrom() {

+    if (next)

+        next->prev = prev;

+    if (prev)

+        prev->next = next;

+    else

+        data->setFirstRefFrom(next);

+}

+

+RefTo::RefTo(absolute_ptr ptr, SegmentRefData * data, Database * database) : data(data) {

+    assert(database);

+    Segment * destSeg = database->getSegment(ptr.segment_id);

+    assert(destSeg);

+    refFrom = new RefFrom(this, destSeg->getSegmentRefData(ptr.ptr);

+    

+    RefTo * t = data->getRefTo();

+    if (t) {

+        delete t;

+        data->setRefTo(this);

+    }

+}

+

+RefTo::~RefTo() {

+    data->refTo = 0;

+    delete refFrom;

+}

+

+SegmentRefData::SegmentRefData(Uint32 ptr, Segment * seg) : ptr(ptr), seg(seg) {

+    seg->setSegmentRefData(ptr, this);

+}

+

+SegmentRefData::~SegmentRefData() {

+    seg->setSegmentRefData(ptr, 0);

+}