1 files changed, 43 insertions, 0 deletions
diff --git a/tools/read_charmap.py b/tools/read_charmap.py
new file mode 100644
index 0000000..9f396b4
--- /dev/null
+++ b/tools/read_charmap.py
@@ -0,0 +1,43 @@
+import os, io
+
+def parse_int(s):
+	# assumes integers are literal; no +-*/, etc
+	s = s.strip()
+	if s.startswith('$'):
+		return int(s[1:], 16)
+	if s.startswith('%'):
+		return int(s[1:], 2)
+	return int(s)
+
+def parse_string(s):
+	# assumes strings are literal; no STRCAT() etc
+	return s.strip('" ')
+
+def strip_comment(s):
+	# assumes ";" is not in the charmap
+	return s.split(';')[0].rstrip()
+
+def get_project_dir():
+	script_path = os.path.realpath(__file__)
+	script_dir = os.path.dirname(script_path)
+	project_dir = os.path.join(script_dir, '..')
+	return os.path.normpath(project_dir)
+
+def get_charmap_path():
+	project_dir = get_project_dir()
+	return os.path.join(project_dir, 'charmap.asm')
+
+def read_charmap():
+	charmap_path = get_charmap_path()
+	charmap = {}
+	with io.open(charmap_path, 'r', encoding='utf-8') as f:
+		lines = f.readlines()
+	for line in lines:
+		line = strip_comment(line).lstrip()
+		if not line.startswith('charmap '):
+			continue
+		char, value = line[len('charmap '):].rsplit(',', 1)
+		char = parse_string(char)
+		value = parse_int(value)
+		charmap[value] = char
+	return charmap