| // 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. |
| |
| package array |
| |
| import ( |
| "bytes" |
| "fmt" |
| "strings" |
| |
| "github.com/apache/arrow/go/arrow" |
| ) |
| |
| // A type which represents an immutable sequence of fixed-length binary strings. |
| type FixedSizeBinary struct { |
| array |
| |
| valueBytes []byte |
| bytewidth int32 |
| } |
| |
| // NewFixedSizeBinaryData constructs a new fixed-size binary array from data. |
| func NewFixedSizeBinaryData(data *Data) *FixedSizeBinary { |
| a := &FixedSizeBinary{bytewidth: int32(data.DataType().(arrow.FixedWidthDataType).BitWidth() / 8)} |
| a.refCount = 1 |
| a.setData(data) |
| return a |
| } |
| |
| // Value returns the fixed-size slice at index i. This value should not be mutated. |
| func (a *FixedSizeBinary) Value(i int) []byte { |
| i += a.array.data.offset |
| var ( |
| bw = int(a.bytewidth) |
| beg = i * bw |
| end = (i + 1) * bw |
| ) |
| return a.valueBytes[beg:end] |
| } |
| |
| func (a *FixedSizeBinary) String() string { |
| o := new(strings.Builder) |
| o.WriteString("[") |
| for i := 0; i < a.Len(); i++ { |
| if i > 0 { |
| o.WriteString(" ") |
| } |
| switch { |
| case a.IsNull(i): |
| o.WriteString("(null)") |
| default: |
| fmt.Fprintf(o, "%q", a.Value(i)) |
| } |
| } |
| o.WriteString("]") |
| return o.String() |
| } |
| |
| func (a *FixedSizeBinary) setData(data *Data) { |
| a.array.setData(data) |
| vals := data.buffers[1] |
| if vals != nil { |
| a.valueBytes = vals.Bytes() |
| } |
| |
| } |
| |
| func arrayEqualFixedSizeBinary(left, right *FixedSizeBinary) bool { |
| for i := 0; i < left.Len(); i++ { |
| if left.IsNull(i) { |
| continue |
| } |
| if bytes.Compare(left.Value(i), right.Value(i)) != 0 { |
| return false |
| } |
| } |
| return true |
| } |
| |
| var ( |
| _ Interface = (*FixedSizeBinary)(nil) |
| ) |