Fix more issues detected by gcc4 compiler:

More ssize_t/status_t mixup.

headers/os/package/hpkg/BufferDataOutput.h

@@ -21,7 +21,7 @@ public:
 
 			size_t				BytesWritten() const { return fBytesWritten; }
 
-	virtual	status_t			Write(const void* buffer, size_t size);
+	virtual	ssize_t				Write(const void* buffer, size_t size);
 	virtual ssize_t				Read(void* buffer, size_t size)
 									{ return B_NOT_SUPPORTED; }
 

src/add-ons/kernel/file_systems/packagefs/package/CachedDataReader.cpp

@@ -40,8 +40,9 @@ struct CachedDataReader::PagesDataOutput : public BDataIO {
 	{
 	}
 
-	virtual status_t Write(const void* buffer, size_t size)
+	virtual ssize_t Write(const void* buffer, size_t size)
 	{
+		size_t totalSize = size;
 		while (size > 0) {
 			if (fPageCount == 0)
 				return B_BAD_VALUE;
@@ -50,7 +51,7 @@ struct CachedDataReader::PagesDataOutput : public BDataIO {
 			status_t error = vm_memcpy_to_physical(
 				fPages[0]->physical_page_number * B_PAGE_SIZE + fInPageOffset,
 				buffer, toCopy, false);
-			if (error != B_OK)
+			if (error < B_OK)
 				return error;
 
 			fInPageOffset += toCopy;
@@ -64,7 +65,7 @@ struct CachedDataReader::PagesDataOutput : public BDataIO {
 			size -= toCopy;
 		}
 
-		return B_OK;
+		return totalSize;
 	}
 
 	virtual ssize_t Read(void* buffer, size_t size)
@@ -160,7 +161,7 @@ CachedDataReader::ReadDataToOutput(off_t offset, size_t size,
 		// transfer the data of the cache line
 		status_t error = _ReadCacheLine(lineOffset, cacheLineEnd - lineOffset,
 			offset, requestLineLength, output);
-		if (error != B_OK)
+		if (error < B_OK)
 			return error;
 
 		offset = cacheLineEnd;
@@ -399,7 +400,7 @@ CachedDataReader::_WritePages(vm_page** pages, size_t pagesRelativeOffset,
 		// unmap the page
 		vm_put_physical_page(address, handle);
 
-		if (error != B_OK)
+		if (error < B_OK)
 			return error;
 
 		inPageOffset = 0;

src/add-ons/kernel/file_systems/packagefs/package/PackageFile.cpp

@@ -37,7 +37,7 @@ public:
 	{
 	}
 
-	virtual status_t Write(const void* buffer, size_t size)
+	virtual ssize_t Write(const void* buffer, size_t size)
 	{
 		RETURN_ERROR(write_to_io_request(fRequest, buffer, size));
 	}

src/kits/package/hpkg/BufferDataOutput.cpp

@@ -26,7 +26,7 @@ BBufferDataOutput::BBufferDataOutput(void* buffer, size_t size)
 }
 
 
-status_t
+ssize_t
 BBufferDataOutput::Write(const void* buffer, size_t size)
 {
 	if (size == 0)
@@ -37,7 +37,7 @@ BBufferDataOutput::Write(const void* buffer, size_t size)
 	memcpy((uint8*)fBuffer + fBytesWritten, buffer, size);
 	fBytesWritten += size;
 
-	return B_OK;
+	return size;
 }
 
 

src/kits/package/hpkg/DataReader.cpp

@@ -82,7 +82,10 @@ BBufferDataReader::ReadDataToOutput(off_t offset, size_t size,
 	if (size > fSize || offset > (off_t)fSize - (off_t)size)
 		return B_ERROR;
 
-	return output->Write((const uint8*)fData + offset, size);
+	ssize_t result = output->Write((const uint8*)fData + offset, size);
+	if (result > B_OK)
+		return B_OK;
+	return result;
 }
 
 

src/kits/package/hpkg/PackageFileHeapAccessorBase.cpp

@@ -176,7 +176,7 @@ PackageFileHeapAccessorBase::ReadDataToOutput(off_t offset, size_t size,
 			// harm.
 		error = output->Write((char*)uncompressedDataBuffer + inChunkOffset,
 			toWrite);
-		if (error != B_OK)
+		if (error < B_OK)
 			return error;
 
 		remainingBytes -= toWrite;

src/kits/package/hpkg/ZlibCompressor.cpp

@@ -84,7 +84,7 @@ ZlibCompressor::CompressNext(const void* input, size_t inputSize)
 		if (fStream.avail_out < sizeof(outputBuffer)) {
 			status_t error = fOutput->Write(outputBuffer,
 				sizeof(outputBuffer) - fStream.avail_out);
-			if (error != B_OK)
+			if (error < B_OK)
 				return error;
 		}
 	}
@@ -111,7 +111,7 @@ ZlibCompressor::Finish()
 		if (fStream.avail_out < sizeof(outputBuffer)) {
 			status_t error = fOutput->Write(outputBuffer,
 				sizeof(outputBuffer) - fStream.avail_out);
-			if (error != B_OK)
+			if (error < B_OK)
 				return error;
 		}
 

src/kits/package/hpkg/v1/PackageDataReaderV1.cpp

@@ -126,7 +126,7 @@ public:
 
 			// write to the output
 			error = output->Write(buffer->Buffer(), toRead);
-			if (error != B_OK)
+			if (error < B_OK)
 				return error;
 
 			offset += toRead;
@@ -246,7 +246,7 @@ public:
 			size_t toCopy = std::min(size, (size_t)fChunkSize - inChunkOffset);
 			error = output->Write(
 				(uint8*)fUncompressBuffer->Buffer() + inChunkOffset, toCopy);
-			if (error != B_OK)
+			if (error < B_OK)
 				return error;
 
 			size -= toCopy;