first commit

src/Streams/MemoryStream.cpp

@@ -0,0 +1,68 @@
+#include "TessesFramework/Streams/MemoryStream.hpp"
+
+namespace Tesses::Framework::Streams
+{
+    MemoryStream::MemoryStream(bool isWritable)
+    {
+        this->offset=0;
+        this->writable = isWritable;
+    }
+    std::vector<uint8_t>& MemoryStream::GetBuffer()
+    {
+        return this->buffer;
+    }
+    size_t MemoryStream::Read(uint8_t* buff, size_t sz)
+    {
+        if(this->offset >= this->buffer.size()) return 0;
+        size_t toRead = std::min(sz, this->buffer.size()-this->offset);
+        memcpy(buff, this->buffer.data() + this->offset, sz);
+        this->offset += toRead;
+        return toRead;
+    }
+    size_t MemoryStream::Write(const uint8_t* buff, size_t sz)
+    {
+        if(!this->writable) return 0;
+        if(this->offset > this->buffer.size())
+        {
+            this->buffer.resize(this->offset+sz);
+        }
+        this->buffer.insert(this->buffer.begin()+this->offset, buff, buff+sz);
+        this->offset+=sz;
+        return sz;
+    }
+    bool MemoryStream::CanRead()
+    {
+        return true;
+    }
+    bool MemoryStream::CanWrite()
+    {
+        return this->writable;
+    }
+    bool MemoryStream::CanSeek()
+    {
+        return true;
+    }
+    int64_t MemoryStream::GetLength()
+    {
+        return this->buffer.size();
+    }
+    int64_t MemoryStream::GetPosition()
+    {
+        return (int64_t)this->offset;
+    }
+    void MemoryStream::Seek(int64_t pos, SeekOrigin whence)
+    {
+        switch(whence)
+        {
+            case SeekOrigin::Begin:
+                this->offset = (size_t)pos;
+                break;
+            case SeekOrigin::Current:
+                this->offset += (size_t)pos;
+                break;
+            case SeekOrigin::End:
+                this->offset = (size_t)(this->buffer.size() + pos);
+                break;
+        }
+    }
+}