HaikuDepot/SharedBitmap: switched to use BPositionIO...

...instead of BMallocIO specifically.

src/apps/haikudepot/PackageInfo.cpp

@@ -64,16 +64,26 @@ SharedBitmap::SharedBitmap(const char* mimeType)
 }
 
 
-SharedBitmap::SharedBitmap(const BMallocIO& data)
+SharedBitmap::SharedBitmap(BPositionIO& data)
 	:
 	BReferenceable(),
 	fResourceID(-1),
-	fBuffer(new(std::nothrow) uint8[data.BufferLength()]),
+	fBuffer(NULL),
-	fSize(data.BufferLength()),
+	fSize(0),
 	fMimeType()
 {
-	if (fBuffer != NULL)
+	status_t status = data.GetSize(&fSize);
-		memcpy(fBuffer, data.Buffer(), fSize);
+	if (status == B_OK && fSize > 0 && fSize <= 64 * 1024) {
+		fBuffer = new(std::nothrow) uint8[fSize];
+
+		data.Seek(0, SEEK_SET);
+		ssize_t read = data.Read(fBuffer, fSize);
+		if (read != fSize) {
+			delete[] fBuffer;
+			fBuffer = NULL;
+			fSize = 0;
+		}
+	}
 
 	fBitmap[0] = NULL;
 	fBitmap[1] = NULL;

src/apps/haikudepot/PackageInfo.h

@@ -16,7 +16,7 @@
 
 
 class BBitmap;
-class BMallocIO;
+class BPositionIO;
 
 
 class SharedBitmap : public BReferenceable {
@@ -31,7 +31,7 @@ public:
 								SharedBitmap(BBitmap* bitmap);
 								SharedBitmap(int32 resourceID);
 								SharedBitmap(const char* mimeType);
-								SharedBitmap(const BMallocIO& data);
+								SharedBitmap(BPositionIO& data);
 								~SharedBitmap();
 
 			const BBitmap*		Bitmap(Size which);
@@ -49,7 +49,7 @@ private:
 private:
 			int32				fResourceID;
 			uint8*				fBuffer;
-			size_t				fSize;
+			off_t				fSize;
 			BString				fMimeType;
 			BBitmap*			fBitmap[3];
 };