initial commit

took me a day to make the base...
...and ~12 hours to write a reader that reads 100% of all demo songs in
1.0

src/engine/safeReader.h

@@ -0,0 +1,51 @@
+#ifndef _SAFEREADER_H
+#define _SAFEREADER_H
+#include <stdio.h>
+#include <stdlib.h>
+#include "../ta-utils.h"
+
+class SafeReader;
+
+struct EndOfFileException {
+  SafeReader* reader;
+  size_t finalSize;
+  EndOfFileException(SafeReader* r, size_t fs):
+    reader(r),
+    finalSize(fs) {}
+};
+
+class SafeReader {
+  unsigned char* buf;
+  size_t len;
+
+  size_t curSeek;
+
+  public:
+    bool seek(ssize_t where, int whence);
+    size_t tell();
+    size_t size();
+
+    int read(void* where, size_t count);
+
+    // these functions may throw EndOfFileException.
+    char readC();
+    short readS();
+    short readS_BE();
+    int readI();
+    int readI_BE();
+    int64_t readL();
+    int64_t readL_BE();
+    float readF();
+    float readF_BE();
+    double readD();
+    double readD_BE();
+    String readString();
+    String readString(size_t len);
+
+    SafeReader(void* b, size_t l):
+      buf((unsigned char*)b),
+      len(l),
+      curSeek(0) {}
+};
+
+#endif