# 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

    if (length > 80 && NF > 1)

        warn("Line too long to fit on screen")

}

/^ *\t+/ {

    if (! match(FILENAME, "Makefile"))

        warn("Tab character used for indentation");

}

/[ \t]+$/ {

    warn("Trailing spaces or tabs");

}

/^#![^ ]/ {

    warn("Missing space after #!");

}

END {

    if (skip)

        warn("Missing CHECK_STYLE_ENABLE");

    if (error)

        exit 1

}