| // Copyright (C) 2015 The Android Open Source Project |
| // |
| // Licensed 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. |
| |
| package memory |
| |
| import ( |
| "fmt" |
| |
| "android.googlesource.com/platform/tools/gpu/binary" |
| "android.googlesource.com/platform/tools/gpu/database" |
| "android.googlesource.com/platform/tools/gpu/log" |
| ) |
| |
| // Resource returns a Slice that wraps a resource stored in the database. |
| // resId is the identifier of the data and size is the size in bytes of the |
| // data. |
| func Resource(resId binary.ID, size uint64) Slice { |
| return resource{resId, size} |
| } |
| |
| type resource struct { |
| resId binary.ID |
| size uint64 |
| } |
| |
| func (r resource) Get(d database.Database, l log.Logger) ([]byte, error) { |
| res, err := database.Resolve(r.resId, d, l) |
| if err != nil { |
| return nil, err |
| } |
| data := res.([]byte) |
| if r.size != uint64(len(data)) { |
| return nil, fmt.Errorf("Loaded resource is unexpected size. Expected 0x%x, got 0x%x for resource %v", |
| r.size, len(data), r.resId) |
| } |
| return data, nil |
| } |
| |
| func (r resource) ResourceID(d database.Database, l log.Logger) (binary.ID, error) { |
| return r.resId, nil |
| } |
| |
| func (r resource) Size() uint64 { |
| return r.size |
| } |
| |
| func (r resource) Slice(rng Range) Slice { |
| return newResourceSlice(r, rng) |
| } |
| |
| func (r resource) ValidRanges() RangeList { |
| return RangeList{Range{Size: r.Size()}} |
| } |
| |
| func (r resource) String() string { |
| return fmt.Sprintf("Resource[%v]", r.resId) |
| } |
| |
| func newResourceSlice(src Slice, rng Range) Slice { |
| if uint64(rng.Last()) > src.Size() { |
| panic(fmt.Errorf("Slice range %v out of bounds %v", rng, Range{Base: 0, Size: src.Size()})) |
| } |
| return resourceSlice{src, rng} |
| } |
| |
| type resourceSlice struct { |
| src Slice |
| rng Range |
| } |
| |
| func (s resourceSlice) Get(d database.Database, l log.Logger) ([]byte, error) { |
| if data, err := s.src.Get(d, l); err == nil { |
| return data[s.rng.First() : s.rng.Last()+1], nil |
| } else { |
| return nil, err |
| } |
| } |
| |
| func (s resourceSlice) ResourceID(d database.Database, l log.Logger) (binary.ID, error) { |
| panic("resourceSlice.ResourceID currently not implemented") |
| } |
| |
| func (s resourceSlice) Size() uint64 { |
| return s.rng.Size |
| } |
| |
| func (s resourceSlice) Slice(rng Range) Slice { |
| return newResourceSlice(s.src, rng) |
| } |
| |
| func (s resourceSlice) ValidRanges() RangeList { |
| panic("resourceSlice.ValidRanges currently not implemented") |
| } |
| |
| func (s resourceSlice) String() string { |
| return fmt.Sprintf("%v[%v]", s.src, s.rng) |
| } |