From c7116f9bd0471f8638b888472426e383f64cbcdc Mon Sep 17 00:00:00 2001
From: Uko Kokņevičs
Date: Sun, 18 Aug 2024 23:29:37 +0800
Subject: Some more modularisation

---
 .../main/java/lv/enes/orang/utils/Codepoint.java   |  8 +++++
 .../java/lv/enes/orang/utils/PeekableStream.java   | 38 ++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 utils/src/main/java/lv/enes/orang/utils/Codepoint.java
 create mode 100644 utils/src/main/java/lv/enes/orang/utils/PeekableStream.java

(limited to 'utils')

diff --git a/utils/src/main/java/lv/enes/orang/utils/Codepoint.java b/utils/src/main/java/lv/enes/orang/utils/Codepoint.java
new file mode 100644
index 0000000..a981c5e
--- /dev/null
+++ b/utils/src/main/java/lv/enes/orang/utils/Codepoint.java
@@ -0,0 +1,8 @@
+package lv.enes.orang.utils;
+
+public record Codepoint(int cp) {
+	@Override
+	public String toString() {
+		return Character.toString(cp);
+	}
+}
diff --git a/utils/src/main/java/lv/enes/orang/utils/PeekableStream.java b/utils/src/main/java/lv/enes/orang/utils/PeekableStream.java
new file mode 100644
index 0000000..7607a50
--- /dev/null
+++ b/utils/src/main/java/lv/enes/orang/utils/PeekableStream.java
@@ -0,0 +1,38 @@
+package lv.enes.orang.utils;
+
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.Iterator;
+
+public class PeekableStream<T> implements Iterator<T> {
+	private final Iterator<T> input;
+	private final Deque<T> buffer = new ArrayDeque<>();
+
+	public PeekableStream(Iterator<T> input) {
+		this.input = input;
+	}
+
+	@Override
+	public boolean hasNext() {
+		return !buffer.isEmpty() || input.hasNext();
+	}
+
+	@Override
+	public T next() {
+		if (!buffer.isEmpty()) {
+			return buffer.pop();
+		} else {
+			return input.next();
+		}
+	}
+
+	public T peek() {
+		var value = next();
+		putBack(value);
+		return value;
+	}
+
+	public void putBack(T value) {
+		buffer.push(value);
+	}
+}
-- 
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