DBG: added various memory related expression functions

src/dbg/expressionfunctions.cpp

@@ -66,6 +66,10 @@ void ExpressionFunctions::Init()
     RegisterEasy("ternary\1tern", ternary);
 
     RegisterEasy("mem.valid", memvalid);
+    RegisterEasy("mem.base", membase);
+    RegisterEasy("mem.size", memsize);
+    RegisterEasy("mem.iscode", memiscode);
+    RegisterEasy("mem.decodepointer", memdecodepointer);
 
     RegisterEasy("dis.len", dislen);
     RegisterEasy("dis.iscond", disiscond);

src/dbg/exprfunc.cpp

@@ -85,6 +85,28 @@ namespace Exprfunc
         return MemIsValidReadPtr(addr, true);
     }
 
+    duint membase(duint addr)
+    {
+        return MemFindBaseAddr(addr, nullptr);
+    }
+
+    duint memsize(duint addr)
+    {
+        duint size;
+        return MemFindBaseAddr(addr, &size) ? size : 0;
+    }
+
+    duint memiscode(duint addr)
+    {
+        return MemIsCodePage(addr, false);
+    }
+
+    duint memdecodepointer(duint ptr)
+    {
+        auto decoded = ptr;
+        return MemDecodePointer(&decoded, true) ? decoded : ptr;
+    }
+
     duint dislen(duint addr)
     {
         BASIC_INSTRUCTION_INFO info;

src/dbg/exprfunc.h

@@ -21,6 +21,10 @@ namespace Exprfunc
     duint ternary(duint condition, duint value1, duint value2);
 
     duint memvalid(duint addr);
+    duint membase(duint addr);
+    duint memsize(duint addr);
+    duint memiscode(duint addr);
+    duint memdecodepointer(duint ptr);
 
     duint dislen(duint addr);
     duint disiscond(duint addr);