From 42336c560a751297dfe5bb83f95b03a22ef2ac80 Mon Sep 17 00:00:00 2001
From: Milan Suman <>
Date: Mon, 18 Jul 2022 12:13:10 +0530
Subject: [PATCH] Birthed an abomination, what the fuck

---
 scripts/test.sh          |  1 +
 src/lib/java_string.cpp  | 22 ++++++++++---
 src/lib/java_string.h++  |  2 +-
 src/test/java_string.cpp | 70 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 90 insertions(+), 5 deletions(-)
 create mode 100644 src/test/java_string.cpp

diff --git a/scripts/test.sh b/scripts/test.sh
index bbfde42..5248526 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -39,6 +39,7 @@ echo "Building tests..."
 COMPILE_COMMANDS=(
     "$CXX_WITH_FLAGS src/test/nbt_helpers.cpp -Lbin/lib -l:nbt.so -o bin/test/nbt_helpers"
     "$CXX_WITH_FLAGS src/test/cli_argument_parser.cpp -Lbin/lib -l:cli.so -o bin/test/cli_argument_parser"
+    "$CXX_WITH_FLAGS src/test/java_string.cpp -Idependencies/tiny-utf8-4.4.3/include -Lbin/lib -l:java_string.so -o bin/test/java_string"
 )
 for command in ${!COMPILE_COMMANDS[@]}; do
     echo "${COMPILE_COMMANDS[command]}"
diff --git a/src/lib/java_string.cpp b/src/lib/java_string.cpp
index 527de7f..5b4a2f0 100644
--- a/src/lib/java_string.cpp
+++ b/src/lib/java_string.cpp
@@ -14,17 +14,31 @@
 //If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
 #include <tinyutf8/tinyutf8.h>
+#include <vector>
 #include "error.h++"
 
 #include "java_string.h++"
 
 namespace JavaCompat {
-    ErrorOr<tiny_utf8::string> importJavaFormatToString(uint8_t data[]) {
-        tiny_utf8::string output;
-        // do magic
-        return ErrorOr(output);
+    tiny_utf8::string importJavaFormatToString(uint8_t data[]) {
+        std::vector<uint8_t> output;
+        tiny_utf8::string outputString;
+        uint16_t size = static_cast<uint16_t>(data[0])<<8 | static_cast<uint16_t>(data[1]);
+
+        for(uint8_t i=2; i<size; i++){
+            if(i != 0){
+                if(data[i] == 0x80 && data[i-1] == 0xc0){
+                    output[output.size() - 1] = 0x00;
+                    continue;
+                }
+            }
+            output.push_back(data[i]);
+        }
+        return tiny_utf8::string(output.begin(), output.end());
     }
+    /*
     ErrorOr<uint8_t*> exportStringToJavaFormat(tiny_utf8::string data) {
         return ErrorOr(nullptr);
     }
+    */
 }
diff --git a/src/lib/java_string.h++ b/src/lib/java_string.h++
index a50c37b..b57f56b 100644
--- a/src/lib/java_string.h++
+++ b/src/lib/java_string.h++
@@ -17,6 +17,6 @@
 #include "error.h++"
 
 namespace JavaCompat {
-    ErrorOr<tiny_utf8::string> importJavaFormatToString(uint8_t data[]);
+    tiny_utf8::string importJavaFormatToString(uint8_t data[]);
     ErrorOr<uint8_t*> exportStringToJavaFormat(tiny_utf8::string data);
 }
diff --git a/src/test/java_string.cpp b/src/test/java_string.cpp
new file mode 100644
index 0000000..563fab7
--- /dev/null
+++ b/src/test/java_string.cpp
@@ -0,0 +1,70 @@
+// Copyright 2022, FOSS-VG Developers and Contributers
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, version 3.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied
+// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// version 3 along with this program.
+// If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
+
+#include "assert.h++"
+#include "../lib/java_string.h++"
+#include <iostream>
+#include <tinyutf8/tinyutf8.h>
+#include <fstream>
+#include <vector>
+
+
+int main(){
+
+    std::cout << "################################################################################" << std::endl;
+    std::cout << "Java String Tests" << std::endl;
+    std::cout << "################################################################################" << std::endl;
+
+	std::streampos javaSize;
+	char* javaData;
+	std::ifstream javaFile("./resources/unicode_data/java-style_unicode", std::ios::in | std::ios::binary | std::ios::ate);
+	if(javaFile.is_open()){
+		javaSize = javaFile.tellg();
+		javaData = new char[javaSize];
+		javaFile.seekg(0, std::ios::beg);
+		javaFile.read(javaData, javaSize);
+		javaFile.close();
+	}
+
+    tiny_utf8::string importString = JavaCompat::importJavaFormatToString((uint8_t*) javaData);
+
+    std::streampos normalSize;
+	char* normalData;
+	std::ifstream normalFile("./resources/unicode_data/normal_utf-8", std::ios::in | std::ios::binary | std::ios::ate);
+	if(normalFile.is_open()){
+		normalSize = normalFile.tellg();
+		normalData = new char[normalSize];
+		normalFile.seekg(0, std::ios::beg);
+		normalFile.read(normalData, normalSize);
+		normalFile.close();
+	}
+
+    std::vector<char> normalDataVector = std::vector<char>();
+    for(int i=0; i<normalSize; i++){
+        normalDataVector.push_back(normalData[i]);
+    }
+
+    tiny_utf8::string normalString = tiny_utf8::string(normalDataVector.begin(), normalDataVector.end());
+
+    std::cout << normalString.size() << std::endl;
+    std::cout << importString.size() << std::endl;
+
+    ASSERT(normalString == importString);
+    std::cout << "Passed Import Java string test." << std::endl;
+
+	
+	return 0;
+}
+