From 6a653b35990e9a642dd4af9b8ee5742d5a84956c Mon Sep 17 00:00:00 2001
From: unknown <Pixel@.(none)>
Date: Wed, 16 Sep 2009 22:24:08 -0700
Subject: Adding basic Database structure.

---
 Database/internals/database-segment.h | 72 +++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 Database/internals/database-segment.h

(limited to 'Database/internals/database-segment.h')

diff --git a/Database/internals/database-segment.h b/Database/internals/database-segment.h
new file mode 100644
index 0000000..72086a7
--- /dev/null
+++ b/Database/internals/database-segment.h
@@ -0,0 +1,72 @@
+#ifndef __DATABASE_SEGMENT_H__
+#define __DATABASE_SEGMENT_H__
+
+#include "database-types.h"
+
+class SegmentRefData;
+
+/**
+ * The Segment class that holds the memory and patches for a memory segment.
+ *
+ * This class will passively hold the memory for a segment memory. The tags
+ * corresponding to each byte are also stored there. The patches are optionnal,
+ * and will only be allocated if a patch is actually done.
+ *
+ * TODO: do in-memory hollow structure for the tags.
+ */
+
+class Segment : public Base {
+  public:
+      /**
+       * Main constructor.
+       *
+       * @param size is the real data size of this segment.
+       * @param id is the static id for that data segment.
+       * @param cpu_base is the base absolute physical address for that segment in the cpu's flat memory.
+       * @param extra_size gives the size of the uninitialized memory at the end of the segment, typically the bss part.
+       * @param data optionally holds the memory to use for this segment. If it's provided, the caller MUST NOT free it, as it's going to be used directly.
+       */
+      Segment(Uint32 size, Uint32 id, Uint64 cpu_base, Uint32 extra_size = 0, const Byte * data = 0);
+      ~Segment();
+    Uint32 getId() { return id; }
+    /** Will return the byte for that pointer in the segment. May be patched.
+     * @param ptr is the pointer for the byte to be retrieved.
+     * @return the byte read, or -1 if it's inside the BSS part, or outside the whole segment.
+     */
+    short Read(Uint32 ptr);
+    /** Will return the byte for that pointer in the segment. Will NOT be patched.
+     * @param ptr is the pointer for the byte to be retrieved.
+     * @return the byte read, or -1 if it's inside the BSS part, or outside the whole segment.
+     */
+    short RawRead(Uint32 ptr);
+    /** In case you need to read the (unpatched) memory block.
+     * @return the memory block of the segment.
+     */
+    const Byte * getPristineMemory() { return plainmemory; }
+    void Patch(Uint32 ptr, Byte val);
+    void Restore(Uint32 ptr);
+    bool IsPatched(Uint32 ptr);
+    bool IsLoaded() { return loaded; }
+    /** Will load the memory segment with the provided Handle; will
+     * only work if you didn't provide data during the constructor.
+     * @see Segment()
+     */
+    void LoadMemory(Handle * src);
+    void setTag(Uint32 ptr, memory_tags_t tag);
+    memory_tags_t getTag(Uint32 ptr);
+    Uint32 getSize() { return size; }
+    Uint64 getFullSize() { return size + extra_size; }
+    Uint64 getCpuBase() { return cpu_base; }
+    SegmentRefData * getSegmentRefData(Uint32 ptr);
+    void setSegmentRefData(Uint32 ptr, SegmentRefData * data);
+  private:
+    Byte * plainmemory, * patches, * patchesmap;
+    SegmentRefData ** refData;
+    memory_tags_t * tags;
+    bool loaded, allocated;
+    Uint32 size, extra_size;
+    Uint32 id;
+    Uint64 cpu_base;
+}
+
+#endif
-- 
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