acpi: generate and parse mixed asl/aml listing

[seabios.git] / tools / acpi_extract_preprocess.py

diff --git a/tools/acpi_extract_preprocess.py b/tools/acpi_extract_preprocess.py
new file mode 100755 (executable)
index 0000000..4ae364e
--- /dev/null
+++ b/tools/acpi_extract_preprocess.py
@@ -0,0 +1,41 @@
+#!/usr/bin/python
+# Copyright (C) 2011 Red Hat, Inc., Michael S. Tsirkin <mst@redhat.com>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+# Read a preprocessed ASL listing and put each ACPI_EXTRACT
+# directive in a comment, to make iasl skip it.
+# We also put each directive on a new line, the machinery
+# in tools/acpi_extract.py requires this.
+
+import re;
+import sys;
+import fileinput;
+
+def die(diag):
+    sys.stderr.write("Error: %s\n" % (diag))
+    sys.exit(1)
+
+# Note: () around pattern make split return matched string as part of list
+psplit = re.compile(r''' (
+                          \b # At word boundary
+                          ACPI_EXTRACT_\w+ # directive
+                          \s+ # some whitespace
+                          \w+ # array name
+                         )''', re.VERBOSE);
+
+lineno = 0
+for line in fileinput.input():
+    # line number and debug string to output in case of errors
+    lineno = lineno + 1
+    debug = "input line %d: %s" % (lineno, line.rstrip())
+
+    s = psplit.split(line);
+    # The way split works, each odd item is the matching ACPI_EXTRACT directive.
+    # Put each in a comment, and on a line by itself.
+    for i in range(len(s)):
+        if (i % 2):
+            sys.stdout.write("\n/* %s */\n" % s[i])
+        else:
+            sys.stdout.write(s[i])
+