Added char type and Segment.isString

src/index.ts

@@ -35,6 +35,17 @@ export class Reader {
     return value !== 0;
   }
 
+  /**
+   * Read an 8-bit character from the buffer at the current offset, and advance the offset by 1 byte.
+   * @returns A string containing the character read from the buffer.
+   */
+  public char(): string {
+    this.checkBounds(1);
+    const value = this.view.getUint8(this.offset);
+    this.offset += 1;
+    return String.fromCharCode(value);
+  }
+
   /**
    * Read an 8-bit signed integer from the buffer at the current offset, and advance the offset by 1 byte.
    *
@@ -434,6 +445,27 @@ export class Writer {
     this.offset += 1;
   }
 
+  /**
+   * Write an 8-bit character to the buffer at the current offset, and advance the offset by 1 byte.
+   *
+   * @param value The character or its ASCII code to write.
+   */
+  public char(value: string | number): void {
+    if (typeof value === "string") {
+      if (value.length !== 1) {
+        throw new Error("Input must be a single character");
+      }
+      this.checkBounds(1);
+      this.view.setUint8(this.offset, value.charCodeAt(0));
+    } else if (typeof value === "number") {
+      this.checkBounds(1);
+      this.view.setUint8(this.offset, value);
+    } else {
+      throw new Error("Input must be a string or number");
+    }
+    this.offset += 1;
+  }
+
   /**
    * Write an 8-bit signed integer to the buffer at the current offset, and advance the offset by
    * 1 byte.