| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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 com.intellij.util.io; |
| |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| /** |
| * @author max |
| */ |
| public class DataInputOutputUtil { |
| public static final long timeBase = 33L * 365L * 24L * 3600L * 1000L; |
| |
| private DataInputOutputUtil() {} |
| |
| public static StringRef readNAME(@NotNull DataInput record, @NotNull AbstractStringEnumerator nameStore) throws IOException { |
| return StringRef.fromStream(record, nameStore); |
| } |
| |
| public static void writeNAME(@NotNull DataOutput record, @Nullable String name, @NotNull AbstractStringEnumerator nameStore) throws IOException { |
| final int nameId = name != null ? nameStore.enumerate(name) : 0; |
| writeINT(record, nameId); |
| } |
| |
| public static int readINT(@NotNull DataInput record) throws IOException { |
| final int val = record.readUnsignedByte(); |
| if (val < 192) { |
| return val; |
| } |
| |
| int res = val - 192; |
| for (int sh = 6; ; sh += 7) { |
| int next = record.readUnsignedByte(); |
| res |= (next & 0x7F) << sh; |
| if ((next & 0x80) == 0) { |
| return res; |
| } |
| } |
| } |
| |
| public static long readLONG(@NotNull DataInput record) throws IOException { |
| final int val = record.readUnsignedByte(); |
| if (val < 192) { |
| return val; |
| } |
| |
| long res = val - 192; |
| for (int sh = 6; ; sh += 7) { |
| int next = record.readUnsignedByte(); |
| res |= (long)(next & 0x7F) << sh; |
| if ((next & 0x80) == 0) { |
| return res; |
| } |
| } |
| } |
| |
| public static void writeINT(@NotNull DataOutput record, int val) throws IOException { |
| if (0 <= val && val < 192) { |
| record.writeByte(val); |
| } |
| else { |
| record.writeByte(192 + (val & 0x3F)); |
| val >>>= 6; |
| while (val >= 128) { |
| record.writeByte((val & 0x7F) | 0x80); |
| val >>>= 7; |
| } |
| record.writeByte(val); |
| } |
| } |
| |
| public static void writeLONG(@NotNull DataOutput record, long val) throws IOException { |
| if (0 <= val && val < 192) { |
| record.writeByte((int)val); |
| } |
| else { |
| record.writeByte(192 + (int)(val & 0x3F)); |
| val >>>= 6; |
| while (val >= 128) { |
| record.writeByte((int)(val & 0x7F) | 0x80); |
| val >>>= 7; |
| } |
| record.writeByte((int)val); |
| } |
| } |
| |
| public static int readSINT(@NotNull DataInput record) throws IOException { |
| return readINT(record) - 64; |
| } |
| |
| public static void writeSINT(@NotNull DataOutput record, int val) throws IOException { |
| writeINT(record, val + 64); |
| } |
| |
| public static void writeTIME(@NotNull DataOutput record, long timestamp) throws IOException { |
| long relStamp = timestamp - timeBase; |
| if (relStamp < 0 || relStamp >= 0xFF00000000L) { |
| record.writeByte(255); |
| record.writeLong(timestamp); |
| } |
| else { |
| record.writeByte((int)(relStamp >> 32)); |
| record.writeByte((int)(relStamp >> 24)); |
| record.writeByte((int)(relStamp >> 16)); |
| record.writeByte((int)(relStamp >> 8)); |
| record.writeByte((int)(relStamp)); |
| } |
| } |
| |
| public static long readTIME(@NotNull DataInput record) throws IOException { |
| final int first = record.readUnsignedByte(); |
| if (first == 255) { |
| return record.readLong(); |
| } |
| else { |
| final int second = record.readUnsignedByte(); |
| |
| final int third = record.readUnsignedByte() << 16; |
| final int fourth = record.readUnsignedByte() << 8; |
| final int fifth = record.readUnsignedByte(); |
| return ((((long)((first << 8) | second)) << 24) | (third | fourth | fifth)) + timeBase; |
| } |
| } |
| } |