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/*
*
* Copyright (c) 2019, NVIDIA CORPORATION.
*
* 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 ai.rapids.cudf;
import ai.rapids.cudf.HostColumnVector.Builder;
import java.util.function.Consumer;
/**
* Helper utility for creating ranges.
*/
public final class Range {
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendBytes(byte end) {
return appendBytes((byte) 0, end, (byte) 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendBytes(byte start, byte end) {
return appendBytes(start, end, (byte) 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendBytes(byte start, byte end, byte step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (byte i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendShorts(short end) {
return appendShorts((short) 0, end, (short) 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendShorts(short start, short end) {
return appendShorts(start, end, (short) 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendShorts(short start, short end,
short step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (short i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendInts(int end) {
return appendInts(0, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendInts(int start, int end) {
return appendInts(start, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendInts(int start, int end, int step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (int i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendLongs(long start, long end, long step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (long i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendLongs(long end) {
return appendLongs(0, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendLongs(long start, long end) {
return appendLongs(start, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendFloats(float start, float end,
float step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (float i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendFloats(float end) {
return appendFloats(0, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendFloats(float start, float end) {
return appendFloats(start, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @param step how must to step by.
* @return the builder for chaining.
*/
public static final Consumer appendDoubles(double start, double end,
double step) {
assert step > 0;
assert start <= end;
return (b) -> {
for (double i = start; i < end; i += step) {
b.append(i);
}
};
}
/**
* Append a range to the builder. 0 inclusive to end exclusive.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendDoubles(double end) {
return appendDoubles(0, end, 1);
}
/**
* Append a range to the builder. start inclusive to end exclusive.
* @param start first entry.
* @param end last entry exclusive.
* @return the consumer.
*/
public static final Consumer appendDoubles(double start, double end) {
return appendDoubles(start, end, 1);
}
}
