Initial commit

hmpparser.py

@@ -0,0 +1,47 @@
+import os
+import re
+
+from dataclasses import Metadata
+
+types = {'p': 'Plain', 's': 'Simplex', 'd': 'Duplex', 'cs': 'Complex_Small', 'c': 'Complex', 't': 'Triplex'}
+names = {'roman': 'Roman', 'greek': 'Greek', 'italic': 'Italic', 'script': 'Script', 'cyril': 'Cyrillic',
+         'gothgr': 'Gothic_German', 'gothgb': 'Gothic_English', 'gothit': 'Gothic_Italian'}
+
+
+def next_metadata():
+    """Reads the .hmp files on the modsources folder and returns the metadata
+
+    This iterator will go through each .hmp file and yield the metadata for each character therein.
+    The Hershey number is derived from the ranges declared in the file.
+    The ASCII value is incremented by 1 for each character represented on the file, starting with the Space character.
+    The font name is derived from the .hmp filename."""
+
+    print('\nReading .hmp files')
+    folder = 'modsources'
+
+    for filename in os.listdir(folder):
+        if not re.match(r'.+\.hmp', filename):
+            continue
+        with open(os.path.join(folder, filename)) as file:
+            font_name = _create_font_name(filename)
+            print(f'\nDefined file {filename} as font {font_name}')
+            for i, number in enumerate(_iterate_file(file)):
+                ascii_value = i + ord(' ')
+                yield Metadata(number, ascii_value, font_name)
+
+
+def _create_font_name(filename: str):
+    for prefix, font_name in names.items():
+        for suffix, font_type in types.items():
+            if filename == prefix + suffix + '.hmp':
+                return f'Hershey_{font_name}_{font_type}'
+
+
+def _iterate_file(file):
+    for line in file:
+        for token in re.findall(r'(\d+)(-(\d+))?', line):
+            if token[2]:
+                for i in range(int(token[0]), int(token[2]) + 1, 1):
+                    yield i
+            else:
+                yield int(token[0])