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.cpp | 119 ++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Database/internals/database-segment.cpp

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

diff --git a/Database/internals/database-segment.cpp b/Database/internals/database-segment.cpp
new file mode 100644
index 0000000..4b94000
--- /dev/null
+++ b/Database/internals/database-segment.cpp
@@ -0,0 +1,119 @@
+#include "database-segment.h"
+
+Segment::Segment(Uint32 size, Uint32 id, Uint64 cpu_base, Uint32 extra_size, const Byte * data) : patches(0), plainmemory(0), size(size), extra_size(extra_size), id(id), cpu_base(cpu_base) {
+    Uint64 fullsize = size + extra_size;
+    
+    assert(size);
+    
+    if (data) {
+        plainmemory = (Byte *) data;
+        loaded = true;
+        allocated = false
+    } else {
+        plainmemory = Allocator<Byte>::alloc(size);
+        loaded = false;
+        allocated = true;
+    }
+    tags = Allocator<memory_tags_t>::alloc(fullsize);
+    refData = Allocator<SegmentRefData *>::alloc(fullsize);
+}
+
+Segment::~Segment() {
+    if (allocated)
+        Allocator<Byte>::free(plainmemory);
+    if (patches)
+        Allocator<Byte>::free(patches);
+    if (patchesmemory)
+        Allocator<Byte>::free(patchesmap);
+    Allocator<memory_tags_t>::free(tags);
+    Allocator<SegmentRefData *>::free(refData);
+}
+
+short Segment::Read(Uint32 ptr) {
+    if (ptr >= size) {
+        LOG(CONSOLE, ERROR, "Out of bound read attempt in segment %i at %08X\n", id, ptr);
+        return -1;
+    }
+    if (IsPatched(ptr))
+        return patches[ptr];
+    return plainmemory[ptr];
+}
+
+short Segment::RawRead(Uint32 ptr) {
+    if (ptr >= size) {
+        LOG(CONSOLE, ERROR, "Out of bound rawread attempt in segment %i at %08X\n", id, ptr);
+        return -1;
+    }
+    return plainmemory[ptr];
+}
+
+void Segment::Patch(Uint32 ptr, Byte val) {
+    if (!patchesmap) {
+        patches = Allocator<Byte>::alloc(size);
+        patchesmap = Allocator<Byte>::alloc((size << 3) + ((size & 7) ? 1 : 0));
+    }
+    if (ptr >= size) {
+        LOG(CONSOLE, ERROR, "Out of bound patch attempt in segment %i at %08X\n", id, ptr);
+        return;
+    }
+    patches[ptr] = val;
+    patchesmap[ptr / 8] |= (1 << ptr % 8);
+}
+
+void Segment::Restore(Uint32 ptr) {
+    if (!patchesmap)
+        return;
+    if (ptr >= size) {
+        LOG(CONSOLE, ERROR, "Out of bound patch attempt in segment %i at %08X\n", id, ptr);
+        return;
+    }
+    patchesmap[ptr / 8] &= ~(1 << (ptr % 8));
+}
+
+bool Segment::IsPatched(Uint32 ptr) {
+    if (!patchesmap)
+        return false;
+    return patchesmap[ptr / 8] & (1 << (ptr % 8));
+}
+
+void Segment::LoadMemory(Handle * src) {
+    if (loaded) {
+        LOG(CONSOLE, WARNING, "Memory segment already loaded, second attempt ignored.");
+        return;
+    }
+
+    src->Read(plainmemory, size);
+}
+
+void setTag(Uint32 ptr, memory_tags_t tag) {
+    if (ptr >= (size + extra_size)) {
+        LOG(CONSOLE, ERROR, "Out of bound setTag attempt in segment %i at %08X\n", id, ptr);
+        return;
+    }
+    tags[ptr] = tag;
+}
+
+memory_tags_t getTag(Uint32 ptr) {
+    if (ptr >= (size + extra_size)) {
+        memory_tags_t z = { 0, 0 };
+        LOG(CONSOLE, ERROR, "Out of bound getTag attempt in segment %i at %08X\n", id, ptr);
+        return z;
+    }
+    return tags[ptr];
+}
+
+SegmentRefData * Segment::getSegmentRefData(Uint32 ptr) {
+    if (ptr >= (size + extra_size)) {
+        LOG(CONSOLE, ERROR, "Out of bound getSegmentRefData attempt in segment %i at %08X\n", id, ptr);
+        return 0;
+    }
+    return refData[ptr];
+}
+
+void Segment::setSegmentRefData(Uint32 ptr, SegmentRefData * data) {
+    if (ptr >= (size + extra_size)) {
+        LOG(CONSOLE, ERROR, "Out of bound setSegmentRefData attempt in segment %i at %08X\n", id, ptr);
+        return;
+    }
+    refData[ptr] = data;
+}
-- 
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