Include license info in the executable

Makefile

@@ -7,7 +7,7 @@ RAREST_WORD = murky
 
 all: dosdl.com
 
-dosdl.com: dosdl.asm dictionary.inc targets.inc
+dosdl.com: dosdl.asm dictionary.inc targets.inc license.inc
 	$(NASM) -fbin -o $@ $<
 
 dictionary.inc: dictionary.json targets.json compress-dict.py
@@ -16,6 +16,9 @@ dictionary.inc: dictionary.json targets.json compress-dict.py
 targets.inc: targets.json compress-targets.py
 	$(PYTHON) compress-targets.py $< $(RAREST_WORD) $@
 
+license.inc: LICENSE embed-textfile.py
+	$(PYTHON) embed-textfile.py $< license_str $@
+
 clean:
 	rm -f *.inc *.com
 

dosdl.asm

@@ -25,7 +25,7 @@ parse_arguments:
 
 		.leading_spaces_skipped:
 
-	; See whether we have /h or /u
+	; See whether we have /h, /u, /l, or /?
 	cmp cx, 2
 	jb .not_mode_option
 	cmp byte [si], '/'
@@ -62,6 +62,12 @@ parse_arguments:
 		.option_done:
 
 	.not_ultra_hard_mode:
+	cmp byte [si + 1], 'l'
+	je print_license
+
+	cmp byte [si + 2], '?'
+	je print_help
+
 	.not_mode_option:
 
 	test cx, cx
@@ -74,6 +80,13 @@ print_help:
 
 	ret
 
+print_license:
+	mov ah, 9
+	mov dx, license_str
+	int 0x21
+
+	ret
+
 seed_rng_date:
 	; Get date
 	mov ah, 0x2a
@@ -1039,9 +1052,11 @@ guesses_str db ' guesses.$'
 guess_str db ' guess.$'
 
 help_str:
-	db 'Usage: dosdl [/h | /u]', 13, 10
+	db 'Usage: dosdl [/h | /u | /l | /?]', 13, 10
 	db '/h   Enable hard mode.', 13, 10
 	db '/u   Enable ultra hard mode.', 13, 10
+	db '/l   Display license info.', 13, 10
+	db '/?   Display this help.', 13, 10
 	db 13, 10
 	db 'Hello DOSdl is a word guessing game. You have six tries to guess the correct', 13, 10
 	db 'English word. After a guess the game displays feedback under each letter:', 13, 10
@@ -1061,3 +1076,4 @@ help_str:
 
 %include "dictionary.inc"
 %include "targets.inc"
+%include "license.inc"

embed-textfile.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+import sys
+srcpath = sys.argv[1]
+name = sys.argv[2]
+targetpath = sys.argv[3]
+
+with open(srcpath, 'r') as f:
+	lines = [line.rstrip() for line in f]
+
+with open(targetpath, 'w') as f:
+	f.write(f'{name}:\n')
+	for line in lines:
+		encoded = line.encode('cp437')
+		if len(encoded) > 0:
+			f.write(f'\tdb {", ".join(str(char) for char in encoded)}, 13, 10\n')
+		else:
+			f.write('\tdb 13, 10\n')
+	f.write("\tdb '$'\n")