From 47d94cf27b0a0597057c6948b22f489b99556dfb Mon Sep 17 00:00:00 2001
From: Lynne <lynne@bune.city>
Date: Wed, 29 Sep 2021 23:29:21 +1000
Subject: [PATCH] simplify InferDb custom mimetypes

using `buf.starts_with(b"\xAB\xCD")` instead of `buf[0] == 0xAB && buf[1] == 0xCD` is shorter, easier to read, removes the need for the `buf.len() > xyz` check, and actually compiles to (much) less assembly:
https://godbolt.org/z/M7GePGn1T

isn't that just lovely
---
 src/mime_db.rs | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/src/mime_db.rs b/src/mime_db.rs
index 420c4dd..fde0531 100644
--- a/src/mime_db.rs
+++ b/src/mime_db.rs
@@ -18,6 +18,8 @@ cfg_if! {
 			db: infer::Infer,
 		}
 
+		// TODO: msi
+
 		fn open_document_check(buf: &[u8], kind: &str) -> bool {
 			let mime = format!("application/vnd.oasis.opendocument.{}", kind);
 			let mime = mime.as_bytes();
@@ -48,15 +50,7 @@ cfg_if! {
 				info.add("audio/x-aiff", "aiff", |buf| {
 					// as added by https://github.com/bojand/infer/pull/48/files
 					// this should be removed when (if) that PR is accepted
-					buf.len() > 11
-					&& buf[0] == 0x46
-					&& buf[1] == 0x4F
-					&& buf[2] == 0x52
-					&& buf[3] == 0x4D
-					&& buf[8] == 0x41
-					&& buf[9] == 0x49
-					&& buf[10] == 0x46
-					&& buf[11] == 0x46
+					buf.starts_with(b"\x46\x4f\x52\x4d\x41\x49\x46\x46")
 				});
 
 				info.add("image/svg+xml", "svg", |buf| {