Add support for JMP (#784)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

Author: kercsoj

core.js

@@ -1673,6 +1673,17 @@ export class FileTypeParser {
 			};
 		}
 
+		// -- 16-byte signatures --
+
+		// JMP files - check for both Little Endian and Big Endian signatures
+		if (this.check([0xFF, 0xFF, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00])
+			|| this.check([0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x04, 0x00, 0x01, 0x00, 0x01])) {
+			return {
+				ext: 'jmp',
+				mime: 'application/x-jmp-data',
+			};
+		}
+
 		// Increase sample size from 256 to 512
 		await tokenizer.peekBuffer(this.buffer, {length: Math.min(512, tokenizer.fileInfo.size), mayBeLess: true});
 

fixture/fixture.jmp

@@ -241,6 +241,7 @@
 		"potm",
 		"pptm",
 		"jar",
+		"jmp",
 		"rm",
 		"ppsm",
 		"ppsx",

package.json

@@ -533,6 +533,7 @@ abortController.abort(); // Abort file-type reading from the Blob stream.
 - [`j2c`](https://en.wikipedia.org/wiki/JPEG_2000) - JPEG 2000
 - [`jar`](https://en.wikipedia.org/wiki/JAR_(file_format)) - Java archive
 - [`jls`](https://en.wikipedia.org/wiki/Lossless_JPEG#JPEG-LS) - Lossless/near-lossless compression standard for continuous-tone images
+- [`jmp`](https://en.wikipedia.org/wiki/JMP_(statistical_software)) - JMP data file format by SAS Institute
 - [`jp2`](https://en.wikipedia.org/wiki/JPEG_2000) - JPEG 2000
 - [`jpg`](https://en.wikipedia.org/wiki/JPEG) - Joint Photographic Experts Group image
 - [`jpm`](https://en.wikipedia.org/wiki/JPEG_2000) - JPEG 2000

readme.md

@@ -171,6 +171,7 @@ export const extensions = [
 	'potm',
 	'pptm',
 	'jar',
+	'jmp',
 	'rm',
 	'ppsm',
 	'ppsx',
@@ -353,4 +354,5 @@ export const mimeTypes = [
 	'application/vnd.rn-realmedia',
 	'application/x-ms-regedit',
 	'application/x-ft-windows-registry-hive',
+	'application/x-jmp-data',
 ];