Oops, forgot to check in the script for running Flex/Lex.

svn path=/trunk/; revision=22447

1 files changed, 159 insertions, 0 deletions

diff --git a/tools/runlex.sh b/tools/runlex.sh
new file mode 100755
index 0000000000..c70c46eeed
--- /dev/null
+++ b/tools/runlex.sh
@@ -0,0 +1,159 @@
+#! /bin/sh
+
+#
+# runlex.sh
+# Script to run Lex/Flex.
+# First argument is the (quoted) name of the command; if it's null, that
+# means that neither Flex nor Lex was found, so we report an error and
+# quit.
+#
+# $Id$
+#
+# Wireshark - Network traffic analyzer
+# By Gerald Combs <gerald@wireshark.org>
+# Copyright 2007 Gerald Combs
+#
+# 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
+# of the License, 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+
+#
+# Get the name of the command to run, and then shift to get the arguments.
+#
+if [ $# -eq 0 ]
+then
+	echo "Usage: runlex <lex/flex command to run> [ arguments ]" 1>&2
+	exit 1
+fi
+LEX="$1"
+shift
+
+#
+# Check whether we have it.
+#
+if [ -z "${LEX}" ]
+then
+	echo "Neither lex nor flex was found" 1>&2
+	exit 1
+fi
+
+#
+# Process the flags.  We don't use getopt because we don't want to
+# embed complete knowledge of what options are supported by Lex/Flex.
+#
+flags=""
+outfile=lex.yy.c
+while [ $# -ne 0 ]
+do
+	case "$1" in
+
+	-o*)
+		#
+		# Set the output file name.
+		#
+		outfile=`echo "$1" | sed 's/-o\(.*\)/\1/'`
+		;;
+
+	-*)
+		#
+		# Add this to the list of flags.
+		#
+		flags="$flags $1"
+		;;
+
+	--|*)
+		#
+		# End of flags.
+		#
+		break
+		;;
+	esac
+	shift
+done
+
+#
+# OK, run it.
+#
+${LEX} -o"$outfile" $flags "$@"
+
+#
+# Did it succeed?
+#
+if [ $? -ne 0 ]
+then
+	#
+	# No.  Exit with the failing exit status.
+	#
+	exit $?
+fi
+
+#
+# Flex has the annoying habit of stripping all but the last component of
+# the "-o" flag argument and using that as the place to put the output.
+# This gets in the way of building in a directory different from the
+# source directory.  Try to work around this.
+#
+# Is the outfile where we think it is?
+#
+outfile_base=`basename "$outfile"`
+if [ "$outfile_base" != "$outfile" -a ! -e "$outfile" -a -e "$outfile_base" ]
+then
+	#
+	# No, it's not, but it is in the current directory.  Put it
+	# where it's supposed to be.
+	#
+	mv "$outfile_base" "$outfile"
+	if [ $? -ne 0 ]
+	then
+		echo $?
+	fi
+fi
+
+#
+# OK, now let's generate a header file declaring the relevant functions
+# defined by the .c file; if the .c file is .../foo.c, the header file
+# will be .../foo_lex.h.
+#
+# This works around some other Flex suckage, wherein it doesn't declare
+# the lex routine before defining it, causing compiler warnings.
+# XXX - newer versions of Flex support --header-file=, to generate the
+# appropriate header file.  With those versions, we should use that option.
+#
+
+#
+# Get the name of the prefix; scan the source files for a %option prefix
+# line.  We use the last one.
+#
+prefix=`sed -n 's/%option[ 	][ 	]*prefix="\(.*\)".*/\1/p' "$@" | tail -1`
+if [ ! -z "$prefix" ]
+then
+	prefixline="#define yylex ${prefix}lex"
+fi
+
+#
+# Construct the name of the header file.
+#
+header_file=`dirname "$outfile"`/`basename "$outfile" .c`_lex.h
+
+#
+# Spew out the declaration.
+#
+cat <<EOF >$header_file
+/* This is generated by runlex.sh.  Do not edit it. */
+$prefixline
+#ifndef YY_DECL
+#define YY_DECL int yylex YY_PROTO(( void ))
+#endif  
+YY_DECL;
+EOF