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authorMarc Mari <markmb@redhat.com>2016-08-12 09:27:02 -0400
committerMax Reitz <mreitz@redhat.com>2016-09-20 22:10:58 +0200
commit0c0c1fd973013671ea63680fcd9802766c1d04fe (patch)
treeff836e0e67de4752d00143a0afed93c27464a3a9 /scripts
parentf57b4b5fb127b60e1aade2684a8b16bc4f630b29 (diff)
blockdev: Add dynamic generation of module_block.h
To simplify the addition of new block modules, add a script that generates module_block.h automatically from the modules' source code. This script assumes that the QEMU coding style rules are followed. Signed-off-by: Marc MarĂ­ <markmb@redhat.com> Signed-off-by: Colin Lord <clord@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1471008424-16465-3-git-send-email-clord@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/modules/module_block.py108
1 files changed, 108 insertions, 0 deletions
diff --git a/scripts/modules/module_block.py b/scripts/modules/module_block.py
new file mode 100644
index 0000000000..db4fb540cd
--- /dev/null
+++ b/scripts/modules/module_block.py
@@ -0,0 +1,108 @@
+#!/usr/bin/python
+#
+# Module information generator
+#
+# Copyright Red Hat, Inc. 2015 - 2016
+#
+# Authors:
+# Marc Mari <markmb@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2.
+# See the COPYING file in the top-level directory.
+
+from __future__ import print_function
+import sys
+import os
+
+def get_string_struct(line):
+ data = line.split()
+
+ # data[0] -> struct element name
+ # data[1] -> =
+ # data[2] -> value
+
+ return data[2].replace('"', '')[:-1]
+
+def add_module(fheader, library, format_name, protocol_name):
+ lines = []
+ lines.append('.library_name = "' + library + '",')
+ if format_name != "":
+ lines.append('.format_name = "' + format_name + '",')
+ if protocol_name != "":
+ lines.append('.protocol_name = "' + protocol_name + '",')
+
+ text = '\n '.join(lines)
+ fheader.write('\n {\n ' + text + '\n },')
+
+def process_file(fheader, filename):
+ # This parser assumes the coding style rules are being followed
+ with open(filename, "r") as cfile:
+ found_something = False
+ found_start = False
+ library, _ = os.path.splitext(os.path.basename(filename))
+ for line in cfile:
+ if found_start:
+ line = line.replace('\n', '')
+ if line.find(".format_name") != -1:
+ format_name = get_string_struct(line)
+ elif line.find(".protocol_name") != -1:
+ protocol_name = get_string_struct(line)
+ elif line == "};":
+ add_module(fheader, library, format_name, protocol_name)
+ found_start = False
+ elif line.find("static BlockDriver") != -1:
+ found_something = True
+ found_start = True
+ format_name = ""
+ protocol_name = ""
+
+ if not found_something:
+ print("No BlockDriver struct found in " + filename + ". \
+ Is this really a module?", file=sys.stderr)
+ sys.exit(1)
+
+def print_top(fheader):
+ fheader.write('''/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
+/*
+ * QEMU Block Module Infrastructure
+ *
+ * Authors:
+ * Marc Mari <markmb@redhat.com>
+ */
+
+''')
+
+ fheader.write('''#ifndef QEMU_MODULE_BLOCK_H
+#define QEMU_MODULE_BLOCK_H
+
+#include "qemu-common.h"
+
+static const struct {
+ const char *format_name;
+ const char *protocol_name;
+ const char *library_name;
+} block_driver_modules[] = {''')
+
+def print_bottom(fheader):
+ fheader.write('''
+};
+
+#endif
+''')
+
+# First argument: output file
+# All other arguments: modules source files (.c)
+output_file = sys.argv[1]
+with open(output_file, 'w') as fheader:
+ print_top(fheader)
+
+ for filename in sys.argv[2:]:
+ if os.path.isfile(filename):
+ process_file(fheader, filename)
+ else:
+ print("File " + filename + " does not exist.", file=sys.stderr)
+ sys.exit(1)
+
+ print_bottom(fheader)
+
+sys.exit(0)