output emulatable .elf

1 files changed, 40 insertions, 0 deletions

diff --git a/subx.py b/subx.py
new file mode 100644
index 0000000..53f72ce
--- /dev/null
+++ b/subx.py
@@ -0,0 +1,40 @@
+import re
+white = re.compile('[ \t\.\n]+')
+hex = re.compile('^(0x)?[0-9a-f]+$')
+
+def parse_part(part):
+  part = part.split('/')
+  if hex.match(part[0]):
+    part[0] = int(part[0], 16)
+  return tuple(part)
+
+def parse_instr(line):
+  parts = white.split(line)
+  parts = [parse_part(part) for part in parts if part != '']
+  return parts
+
+def parse_segment(line):
+  parts = white.split(line)
+  return (parts[1], int(parts[2], 16))
+
+def format_part(part):
+  if not isinstance(part[0], str):
+    part = ('{:02x}'.format(part[0]),) + part[1:]
+  return '/'.join(part)
+
+def format_instr(inst, comment=None):
+  packed = ' '.join(format_part(part) for part in inst)
+  if comment:
+    packed = packed + '  # ' + comment
+  return packed
+
+def clean(line):
+  return line.strip().split('#')[0]
+
+def classify(line):
+  if line.startswith('=='): # segment
+    return 'segment'
+  elif line.endswith(':'): # label
+    return 'label'
+  else:
+    return 'instr'