settings file and save/restore ui state

src/binary_stream.cpp

@@ -1,7 +1,6 @@
 #include "pch.h"
 #include "binary_stream.h"
-
-
+#include "asset.h"
 
 BinaryStreamReader::~BinaryStreamReader()
 {
@@ -17,6 +16,17 @@ void BinaryStreamReader::init(uint8_t* data_ptr, size_t size, ByteOrder byte_ord
     m_swap = byte_order == ByteOrder::Host ? false : byte_order != sys_order();
 }
 
+bool BinaryStreamReader::load(const std::string& path, ByteOrder byte_order /*= ByteOrder::Host*/)
+{
+    if (m_asset.open(path.c_str()))
+    {
+        m_asset.read_all();
+        init(m_asset.m_data, m_asset.m_len, byte_order);
+        return true;
+    }
+    return false;
+}
+
 size_t BinaryStreamReader::pos()
 {
     return std::distance(m_ptr, m_cur);
@@ -198,6 +208,17 @@ void BinaryStreamWriter::init(ByteOrder byte_order /*= ByteOrder::Host*/)
     m_swap = byte_order == ByteOrder::Host ? false : byte_order != sys_order();
 }
 
+bool BinaryStreamWriter::save(const std::string& path) const
+{
+    std::ofstream f(path, std::ios::binary);
+    if (f.good())
+    {
+        f.write((char*)m_data.data(), m_data.size());
+        return true;
+    }
+    return false;
+}
+
 void BinaryStreamWriter::skip(size_t bytes, uint8_t fill /*= 0*/)
 {
     m_data.resize(m_data.size() + bytes);
@@ -334,5 +355,6 @@ void BinaryStreamWriter::wrle(std::vector<uint8_t> data)
 
 void BinaryStreamWriter::wkey_or_string(std::string s)
 {
+    assert(s.size() > 0);
     wstring(s);
 }