giga-refactor, part 1

work on loading - NOT WORKING

src/engine/song.cpp

@@ -20,6 +20,7 @@
 #include "engine.h"
 #include "../ta-log.h"
 #include <inttypes.h>
+#include <string.h>
 #include <chrono>
 
 static DivCompatFlags defaultFlags;
@@ -952,6 +953,23 @@ bool DivCompatFlags::areDefaults() {
   return (*this==defaultFlags);
 }
 
+bool DivCompatFlags::readData(SafeReader& reader) {
+  DivConfig c;
+  unsigned char magic[4];
+
+  reader.read(magic,4);
+  if (memcmp(magic,"CFLG",4)!=0) {
+    return false;
+  }
+  reader.readI();
+
+  String data=reader.readString();
+  c.loadFromMemory(data.c_str());
+
+  // TODO: this
+  return true;
+}
+
 #define CHECK_AND_STORE_BOOL(_x) \
   if (_x!=defaultFlags._x) { \
     c.set(#_x,_x); \

src/engine/song.h

@@ -160,6 +160,20 @@ enum DivEffectType: unsigned short {
   DIV_EFFECT_FILTER
 };
 
+enum DivFileElementType: unsigned char {
+  DIV_ELEMENT_END=0,
+  DIV_ELEMENT_SUBSONG,
+  DIV_ELEMENT_CHIP_FLAGS,
+  DIV_ELEMENT_ASSET_DIR,
+  DIV_ELEMENT_INSTRUMENT,
+  DIV_ELEMENT_WAVETABLE,
+  DIV_ELEMENT_SAMPLE,
+  DIV_ELEMENT_PATTERN,
+  DIV_ELEMENT_COMPAT_FLAGS,
+  DIV_ELEMENT_COMMENTS,
+  DIV_ELEMENT_GROOVE
+};
+
 struct DivGroovePattern {
   unsigned char val[16];
   unsigned char len;
@@ -349,6 +363,7 @@ struct DivCompatFlags {
 
   void setDefaults();
   bool areDefaults();
+  bool readData(SafeReader& reader);
   void putData(SafeWriter* w);
 
   bool operator==(const DivCompatFlags& other) {