From 6fd9a2b9b90face77df367866ad750d1be74a64a Mon Sep 17 00:00:00 2001
From: elemeat <elemeta47@gmail.com>
Date: Tue, 1 Aug 2017 18:15:06 +0800
Subject: [PATCH] Add Elf file as supported matcher archive type

---
 README.md           | 1 +
 matchers/archive.go | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/README.md b/README.md
index fa3499f..c4d6561 100644
--- a/README.md
+++ b/README.md
@@ -237,6 +237,7 @@ func main() {
 - **Z** - `application/x-compress`
 - **lz** - `application/x-lzip`
 - **rpm** - `application/x-rpm`
+- **elf** - `application/x-executable`
 
 #### Font
 
diff --git a/matchers/archive.go b/matchers/archive.go
index 2ab30f9..9c1270f 100644
--- a/matchers/archive.go
+++ b/matchers/archive.go
@@ -24,6 +24,7 @@ var (
 	TypeZ      = newType("Z", "application/x-compress")
 	TypeLz     = newType("lz", "application/x-lzip")
 	TypeRpm    = newType("rpm", "application/x-rpm")
+	TypeElf    = newType("elf", "application/x-executable")
 )
 
 var Archive = Map{
@@ -50,6 +51,7 @@ var Archive = Map{
 	TypeZ:      Z,
 	TypeLz:     Lz,
 	TypeRpm:    Rpm,
+	TypeElf:    Elf,
 }
 
 func Epub(buf []byte) bool {
@@ -207,3 +209,9 @@ func Rpm(buf []byte) bool {
 		buf[0] == 0xED && buf[1] == 0xAB &&
 		buf[2] == 0xEE && buf[3] == 0xDB
 }
+
+func Elf(buf []byte) bool {
+	return len(buf) > 52 &&
+		buf[0] == 0x7F && buf[1] == 0x45 &&
+		buf[2] == 0x4C && buf[3] == 0x46
+}