From 46f00834b7c11c35bda6857aeaefefe5c81bb5cc Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Wed, 14 Aug 2019 23:17:02 +0200
Subject: Added C implementation of a filereader

---
 src/runMain/kotlin/Loader.kt | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

(limited to 'src/runMain')

diff --git a/src/runMain/kotlin/Loader.kt b/src/runMain/kotlin/Loader.kt
index 19d695b..7cec0a5 100644
--- a/src/runMain/kotlin/Loader.kt
+++ b/src/runMain/kotlin/Loader.kt
@@ -1,9 +1,37 @@
+import kotlinx.cinterop.ByteVar
+import kotlinx.cinterop.allocArray
+import kotlinx.cinterop.memScoped
+import kotlinx.cinterop.toKString
+import platform.posix.*
+
 class Loader(path: String) {
-    // private val inputStream: InputStream = File(path).inputStream()
-    // private val inputString = inputStream.bufferedReader().use { it.readText() }
+    private val inputString = read(path)
 
     // TODO: Add preprocessor managing imports and comments
     fun load(): String {
-        return "Hallo"
+        return inputString
+    }
+
+    private fun read(path: String): String {
+        setlocale(LC_CTYPE, "en_US.UTF-8")
+
+        val file = fopen(path, "r")
+        if (file == null) {
+            perror("cannot open input file $path")
+        }
+
+        memScoped {
+            val bufferLength = 64 * 1024
+            val buffer = allocArray<ByteVar>(bufferLength)
+
+            var content = ""
+            var nextLine = fgets(buffer, bufferLength, file)?.toKString()
+            while (nextLine != null) {
+                content += nextLine
+                nextLine = fgets(buffer, bufferLength, file)?.toKString()
+            }
+            fclose(file)
+            return content
+        }
     }
 }
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