From 4212bec61f2daefb4a2c692cbfb58b750de27813 Mon Sep 17 00:00:00 2001
From: Jesper Saastamoinen <jespersaastamoinen@gmail.com>
Date: Tue, 17 Sep 2024 14:48:10 +0200
Subject: [PATCH] Added FileReader to stdlib Added FileReader to stdlib to read
 in files and return it as a string

---
 .gitignore                                    |  3 +-
 hello_world.froj                              |  5 ++--
 src/com/jsaasta/froj/Froj.java                |  2 +-
 src/com/jsaasta/froj/stdlib/Clock.java        |  5 +++-
 src/com/jsaasta/froj/stdlib/FileReader.java   | 29 +++++++++++++++++++
 src/com/jsaasta/froj/stdlib/Stdlib.java       |  1 +
 .../froj/stdlib/StdlibRuntimeError.java       | 11 +++++++
 7 files changed, 50 insertions(+), 6 deletions(-)
 create mode 100644 src/com/jsaasta/froj/stdlib/FileReader.java
 create mode 100644 src/com/jsaasta/froj/stdlib/StdlibRuntimeError.java

diff --git a/.gitignore b/.gitignore
index 00df01e..b682dd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,5 @@ bin/
 
 .class
 /src/*.jar
-/.idea
\ No newline at end of file
+/.idea
+hello_world.froj
\ No newline at end of file
diff --git a/hello_world.froj b/hello_world.froj
index 266bb84..b8582c3 100644
--- a/hello_world.froj
+++ b/hello_world.froj
@@ -1,4 +1,3 @@
+var string = fileReader("..eogm");
 
-
-
-print "Hello world!";
\ No newline at end of file
+print string;
diff --git a/src/com/jsaasta/froj/Froj.java b/src/com/jsaasta/froj/Froj.java
index 223e3f3..156beb2 100644
--- a/src/com/jsaasta/froj/Froj.java
+++ b/src/com/jsaasta/froj/Froj.java
@@ -74,7 +74,7 @@ public class Froj {
 
     }
 
-    static void error(int line, String message) {
+    public static void error(int line, String message) {
         report(line, "", message);
     }
 
diff --git a/src/com/jsaasta/froj/stdlib/Clock.java b/src/com/jsaasta/froj/stdlib/Clock.java
index 6029868..608e7ba 100644
--- a/src/com/jsaasta/froj/stdlib/Clock.java
+++ b/src/com/jsaasta/froj/stdlib/Clock.java
@@ -5,6 +5,9 @@ import com.jsaasta.froj.Interpreter;
 
 import java.util.List;
 
+/**
+ * @return Returns current time in nanoSeconds / 1000;
+ */
 public class Clock implements FrojCallable {
 
     @Override
@@ -14,7 +17,7 @@ public class Clock implements FrojCallable {
 
     @Override
     public Object call(Interpreter interpreter, List<Object> arguments) {
-        return (double) System.currentTimeMillis() / 1000.0;
+        return (double) System.nanoTime() / 1000.0;
     }
 
     @Override
diff --git a/src/com/jsaasta/froj/stdlib/FileReader.java b/src/com/jsaasta/froj/stdlib/FileReader.java
new file mode 100644
index 0000000..c21714c
--- /dev/null
+++ b/src/com/jsaasta/froj/stdlib/FileReader.java
@@ -0,0 +1,29 @@
+package com.jsaasta.froj.stdlib;
+
+import com.jsaasta.froj.Froj;
+import com.jsaasta.froj.FrojCallable;
+import com.jsaasta.froj.Interpreter;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+public class FileReader implements FrojCallable {
+    @Override
+    public int arity() {
+        return 1;
+    }
+
+    @Override
+    public Object call(Interpreter interpreter, List<Object> arguments) {
+
+        try {
+            byte[] bytes = Files.readAllBytes(Paths.get((String) arguments.get(0)));
+            return new String(bytes, Charset.defaultCharset());
+        } catch (IOException e) {
+           throw new StdlibRuntimeError("Couldn't find file: " + arguments.get(0));
+        }
+    }
+}
diff --git a/src/com/jsaasta/froj/stdlib/Stdlib.java b/src/com/jsaasta/froj/stdlib/Stdlib.java
index 4ce8c58..2ad7d0d 100644
--- a/src/com/jsaasta/froj/stdlib/Stdlib.java
+++ b/src/com/jsaasta/froj/stdlib/Stdlib.java
@@ -11,6 +11,7 @@ public class Stdlib {
         classes = new HashMap<>();
         classes.put("clock", new Clock());
         classes.put("input", new Input());
+        classes.put("fileReader", new FileReader());
     }
 
     public static Map<String, Object> define(){
diff --git a/src/com/jsaasta/froj/stdlib/StdlibRuntimeError.java b/src/com/jsaasta/froj/stdlib/StdlibRuntimeError.java
new file mode 100644
index 0000000..842d286
--- /dev/null
+++ b/src/com/jsaasta/froj/stdlib/StdlibRuntimeError.java
@@ -0,0 +1,11 @@
+package com.jsaasta.froj.stdlib;
+
+import com.jsaasta.froj.Token;
+
+public class StdlibRuntimeError extends RuntimeException{
+
+
+    public StdlibRuntimeError(String message) {
+        super(message, null, false, false);
+    }
+}