#!/bin/sh
# incgrep --- search all header files in known include directories for pattern
# Author: Noah Friedman <friedman@splode.com>
# Created: 1996-01-29

# Copyright (C) 1995, 1996, 2004, 2005 Noah S. Friedman

# $Id: incgrep,v 2.5 2005/10/02 18:38:43 friedman Exp $

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, you can either send email to this
# program's maintainer or write to: The Free Software Foundation,
# Inc.; 51 Franklin Street, Fifth Floor; Boston, MA 02110-1301, USA.

# Commentary:

# This script works better if you have GCC version 2+ and GNU `find'.

# Code:

cc=${CC-gcc}
cpp=cpp

includes='
  /usr/local/gnu/include
  /usr/local/include
  /usr/include
'

if ($cc -v) > /dev/null 2>&1; then
  version=`$cc -v 2>&1 \
            | sed -ne '/gcc version/!d' -e 's/gcc version  *//p'`
  case "$version" in
    2.95.* | [3-9].* )
      cpp=`$cc -print-prog-name=cpp`
     ;;
    2.* )
      ccdir=`$cc -print-libgcc-file-name | sed -e 's/\/[^/]*$//'`
      cpp=$ccdir/cpp
     ;;
  esac

  case $1 in
    -lang-* )
      lang=`echo "$1" | sed -e 's/^-lang-//'`
      cpp="$cpp -x $lang"
      shift
     ;;
  esac

  includes=`$cpp -v 2>&1 < /dev/null \
              | sed -ne '/#include <...> search starts here:/!d
                         n
                         :l
                         /^End of search list./!{
                           p
                           n
                           b l
                         }'`
fi

follow=
if (find --version) > /dev/null 2>&1 ; then
   follow=-follow
else
   case `(uname -s) 2> /dev/null` in
     FreeBSD ) follow=-follow ;;
   esac
fi

{
  case $lang in
    c++ ) find $includes $follow -type f -print ;;
    * )   find $includes $follow -name '*.h' -print ;;
  esac
} 2> /dev/null | xargs grep ${1+"$@"}

# incgrep ends here.