| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "iobuffer.h" |
| |
| IoBuffer::IoBuffer(zx::vmo vmo, vmoid_t id) : io_vmo_(std::move(vmo)), vmoid_(id) {} |
| |
| IoBuffer::~IoBuffer() {} |
| |
| zx_status_t IoBuffer::ValidateVmoHack(uint64_t length, uint64_t vmo_offset) { |
| uint64_t vmo_size; |
| zx_status_t status; |
| if ((status = io_vmo_.get_size(&vmo_size)) != ZX_OK) { |
| return status; |
| } else if ((vmo_offset > vmo_size) || (vmo_size - vmo_offset < length)) { |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| return ZX_OK; |
| } |
