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+# Copyright 2015 The Kyua Authors.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# * Neither the name of Google Inc. nor the names of its contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function warn(msg) {
+ print FILENAME "[" FNR "]: " msg > "/dev/stderr"
+ error = 1
+}
+
+BEGIN {
+ skip = 0
+ error = 0
+}
+
+/CHECK_STYLE_DISABLE/ {
+ skip = 1
+ next
+}
+
+/CHECK_STYLE_ENABLE/ {
+ skip = 0
+ next
+}
+
+/CHECK_STYLE_(ENABLE|DISABLE)/ {
+ next
+}
+
+{
+ if (skip)
+ next
+}
+
+/#ifdef/ {
+ warn("Undesired usage of #ifdef; use #if defined()")
+}
+
+/#ifndef/ {
+ warn("Undesired usage of #ifndef; use #if !defined()")
+}
+
+/assert[ \t]*\(/ {
+ warn("Use the macros in sanity.hpp instead of assert");
+}
+
+/#.*include.*assert/ {
+ warn("Do not include assert.h nor cassert");
+}
+
+/std::endl/ {
+ warn("Use \\n instead of std::endl");
+}
+
+/\/\*/ && ! /\*\// {
+ warn("Do not use multi-line C-style comments");
+}
+
+END {
+ if (skip)
+ warn("Missing CHECK_STYLE_ENABLE");
+ if (error)
+ exit 1
+}