| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| /*! |
| * \brief gotvm package source for TVMByteArray interface. |
| * \file bytearray.go |
| */ |
| |
| package gotvm |
| |
| //#include "gotvm.h" |
| import "C" |
| |
| import ( |
| "unsafe" |
| ) |
| |
| // ByteArray type wraps the TVMByteArray of C runtime API. |
| // |
| // This can be used to hold raw data like params of a model. |
| type ByteArray uintptr |
| |
| // nativeCPtr returns the type freed unitptr for ByteArray. |
| func (tbytearray ByteArray) nativeCPtr() (retVal uintptr) { |
| retVal = (uintptr)(tbytearray) |
| return |
| } |
| |
| // SetData is used to intialize ByteArray from a golang string object. |
| // |
| // This method initialize both data and data size of the underlaying object. |
| // This function handles freeing old data object if any before allocating new. |
| // |
| // `val` is the golang string object from which the ByteArray is initialized. |
| func (tbytearray ByteArray) setData(val string) { |
| bufPtr := ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).data |
| if bufPtr == (*C.char)(C.NULL) { |
| C.free(unsafe.Pointer(bufPtr)) |
| } |
| |
| ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).data = C.CString(val) |
| ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).size = C.ulong(len(val)) |
| } |
| |
| // getData returns the golang byte slice corresponding to the ByteArray. |
| func (tbytearray ByteArray) getData() (retVal []byte) { |
| val := ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).data |
| blen := ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).size |
| retVal = C.GoBytes(unsafe.Pointer(val), C.int(blen)) |
| return |
| } |
| |
| // newByteArray initilizes the native TVMByteArray object with given byte slice |
| // |
| //`val` is the golang byte array used to initialize. |
| // |
| // returns newly created ByteArray. |
| func newByteArray(val []byte) (retVal ByteArray) { |
| handle := ByteArray(C.malloc(C.sizeof_TVMByteArray)) |
| ((*C.TVMByteArray)(unsafe.Pointer(handle))).data = (*C.char)(C.NULL) |
| ((*C.TVMByteArray)(unsafe.Pointer(handle))).size = 0 |
| handle.setData(string(val)) |
| retVal = handle |
| return |
| } |
| |
| // deleteTVMByteArray releases the allocated native object of ByteArray. |
| // |
| // This delete handles freeing of underlaying native data object too. |
| func (tbytearray ByteArray) deleteTVMByteArray() { |
| bufPtr := ((*C.TVMByteArray)(unsafe.Pointer(tbytearray))).data |
| C.free(unsafe.Pointer(bufPtr)) |
| C.free(unsafe.Pointer(tbytearray.nativeCPtr())) |
| } |