From f0963603bff9ab4b496df290a60696a2941419dc Mon Sep 17 00:00:00 2001
From: WerWolv <werwolv98@gmail.com>
Date: Sat, 27 Aug 2022 12:41:59 +0200
Subject: [PATCH] patterns: Added bencode pattern

---
 README.md               |  1 +
 patterns/bencode.hexpat | 73 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 patterns/bencode.hexpat

diff --git a/README.md b/README.md
index 0b8ea76..e13fce8 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ Hex patterns, include patterns and magic files for the use with the ImHex Hex Ed
 | IP | | `patterns/ip.hexpat` | Ethernet II Frames (IP Packets) | 
 | UF2 | | `patterns/uf2.hexpat` | [USB Flashing Format](https://github.com/microsoft/uf2) | 
 | File System | | `patterns/fs.hexpat` | Drive File System | 
+| Bencode | `application/x-bittorrent` | `patterns/bencode.hexpat` | Bencode encoding, used by Torrent files | 
 
 ### Scripts
 
diff --git a/patterns/bencode.hexpat b/patterns/bencode.hexpat
new file mode 100644
index 0000000..0065c03
--- /dev/null
+++ b/patterns/bencode.hexpat
@@ -0,0 +1,73 @@
+#pragma MIME application/x-bittorrent
+
+#include <std/ctype.pat>
+#include <std/mem.pat>
+#include <std/string.pat>
+
+namespace bencode {
+	
+	struct ASCIIDecimal {
+		char value[while(std::ctype::isdigit(std::mem::read_unsigned($, 1)))];
+	} [[sealed, format("bencode::format_ascii_decimal"), transform("bencode::format_ascii_decimal")]];
+	
+	fn format_ascii_decimal(ASCIIDecimal adsasd) {
+		return std::string::parse_int(adsasd.value, 10);
+	};
+	
+	enum Type : u8 {
+		Integer = 'i',
+		Dictionary = 'd',
+		List = 'l',
+		
+		String0 = '0',
+		String1 = '1',
+		String2 = '2',
+		String3 = '3',
+		String4 = '4',
+		String5 = '5',
+		String6 = '6',
+		String7 = '7',
+		String8 = '8',
+		String9 = '9'
+	};
+	
+	struct String {
+		ASCIIDecimal length;
+		char separator [[hidden]];
+		char value[length];
+	} [[sealed, format("bencode::format_string"), transform("bencode::format_string")]];
+	
+	fn format_string(String string) {
+		return string.value; 
+	};
+	
+	using Bencode;
+	using Value;
+	
+	struct DictionaryEntry {
+		String key;
+		Value value;
+	};
+	
+	struct Value {
+		Type type;
+		
+		if (type == Type::Dictionary) {
+			DictionaryEntry entry[while(std::mem::read_unsigned($, 1) != 'e')];			
+		} else if (type == Type::Integer) {
+			ASCIIDecimal value;
+			char end;
+		} else {
+			$ -= 1;
+			String value;
+		}
+	};
+	
+	struct Bencode {
+		Value value[while(!std::mem::eof())] [[inline]];		
+		char end;
+	};
+	
+}
+
+bencode::Bencode bencode @ 0x00;