pdtest: add support for input format specs in test.conf files

The pdtest(1) utility interprets test.conf files. Extend the syntax of
'input' lines. These used to accept one filename only. Add support for
'format' and 'option' keywords. These translate to runtc(1) -I options.

decoder/pdtest

@@ -146,9 +146,26 @@ def parse_testfile(path, pd, tc, op_type, op_class):
                     raise E_syntax
                 tclist[-1]['stack'] = f
             elif key == 'input':
-                if len(f) != 1:
+                if len(f) < 1:
                     raise E_syntax
-                tclist[-1]['input'] = f[0]
+                input_spec = {
+                    'name': f.pop(0),
+                    'format': None,
+                    'options': [],
+                }
+                while len(f):
+                    if len(f) < 2:
+                        # Always needs <key> <value>
+                        raise E_syntax
+                    a, b = f[:2]
+                    f = f[2:]
+                    if a == 'format':
+                        input_spec['format'] = b
+                    elif a == 'option':
+                        input_spec['options'].append(b)
+                    else:
+                        raise E_syntax
+                tclist[-1]['input'] = input_spec
             elif key == 'output':
                 op_spec = {
                     'pd': f.pop(0),
@@ -325,7 +342,15 @@ def run_tests(tests, fix=False):
                         args.extend(['-o', "%s=%s" % (option, value)])
                     for label, initial_pin in spd['initial_pins']:
                         args.extend(['-N', "%s=%d" % (label, initial_pin)])
-                args.extend(['-i', os.path.join(dumps_dir, tc['input'])])
+                # Setup input spec for this test (optional format spec).
+                in_spec = tc['input']
+                infile = os.path.join(dumps_dir, in_spec['name'])
+                args.extend(['-i', infile])
+                if in_spec['format']:
+                    args.extend(['-I', in_spec['format']])
+                    for opt in in_spec['options']:
+                        args.extend(['-I', opt])
+                # Setup output spec for this test.
                 for op in tc['output']:
                     name = "%s/%s/%s" % (pd, tc['name'], op['type'])
                     opargs = ['-O', "%s:%s" % (op['pd'], op['type'])]