Some more modularisation

2 files changed, 46 insertions, 0 deletions

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);
+        }
+}