- add netmap-libpcap
- add netmap (FreeBSD header files need to be updated with this) - move prototype perl scripts to prototype/ folder - create basic structure for sipcap app (no code yet)
This commit is contained in:
farrokhi
233
netmap-libpcap/runlex.sh
Executable file
233
netmap-libpcap/runlex.sh
Executable file
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#! /bin/sh
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#
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# runlex.sh
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# Script to run Lex/Flex.
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# First argument is the (quoted) name of the command; if it's null, that
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# means that neither Flex nor Lex was found, so we report an error and
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# quit.
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#
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#
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# Get the name of the command to run, and then shift to get the arguments.
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#
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if [ $# -eq 0 ]
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then
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echo "Usage: runlex <lex/flex command to run> [ arguments ]" 1>&2
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exit 1
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fi
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LEX="$1"
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shift
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#
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# Check whether we have Lex or Flex.
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#
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if [ -z "${LEX}" ]
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then
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echo "Neither lex nor flex was found" 1>&2
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exit 1
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fi
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#
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# Process the flags. We don't use getopt because we don't want to
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# embed complete knowledge of what options are supported by Lex/Flex.
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#
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flags=""
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outfile=lex.yy.c
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while [ $# -ne 0 ]
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do
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case "$1" in
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-o*)
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#
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# Set the output file name.
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#
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outfile=`echo "$1" | sed 's/-o\(.*\)/\1/'`
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;;
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-*)
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#
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# Add this to the list of flags.
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#
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flags="$flags $1"
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;;
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--|*)
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#
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# End of flags.
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#
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break
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;;
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esac
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shift
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done
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#
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# Is it Lex, or is it Flex?
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#
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if [ "${LEX}" = flex ]
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then
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#
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# It's Flex.
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#
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have_flex=yes
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#
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# Does it support the --noFUNCTION options? If so, we pass
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# --nounput, as at least some versions that support those
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# options don't support disabling yyunput by defining
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# YY_NO_UNPUT.
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#
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if flex --help | egrep noFUNCTION >/dev/null
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then
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flags="$flags --nounput"
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#
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# Does it support -R, for generating reentrant scanners?
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# If so, we're not currently using that feature, but
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# it'll generate some unused functions anyway - and there
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# won't be any header file declaring them, so there'll be
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# defined-but-not-declared warnings. Therefore, we use
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# --noFUNCTION options to suppress generating those
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# functions.
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#
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if flex --help | egrep reentrant >/dev/null
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then
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flags="$flags --noyyget_lineno --noyyget_in --noyyget_out --noyyget_leng --noyyget_text --noyyset_lineno --noyyset_in --noyyset_out"
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fi
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fi
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else
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#
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# It's Lex.
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#
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have_flex=no
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fi
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#
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# OK, run it.
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# If it's lex, it doesn't support -o, so we just write to
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# lex.yy.c and, if it succeeds, rename it to the right name,
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# otherwise we remove lex.yy.c.
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# If it's flex, it supports -o, so we use that - flex with -P doesn't
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# write to lex.yy.c, it writes to a lex.{prefix from -P}.c.
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#
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if [ $have_flex = yes ]
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then
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${LEX} $flags -o"$outfile" "$@"
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#
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# Did it succeed?
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#
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status=$?
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if [ $status -ne 0 ]
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then
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#
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# No. Exit with the failing exit status.
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#
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exit $status
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fi
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#
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# Flex has the annoying habit of stripping all but the last
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# component of the "-o" flag argument and using that as the
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# place to put the output. This gets in the way of building
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# in a directory different from the source directory. Try
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# to work around this.
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#
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# Is the outfile where we think it is?
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#
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outfile_base=`basename "$outfile"`
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if [ "$outfile_base" != "$outfile" -a \( ! -r "$outfile" \) -a -r "$outfile_base" ]
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then
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#
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# No, it's not, but it is in the current directory. Put it
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# where it's supposed to be.
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#
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mv "$outfile_base" "$outfile"
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#
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# Did that succeed?
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#
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status=$?
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if [ $status -ne 0 ]
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then
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#
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# No. Exit with the failing exit status.
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#
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exit $status
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fi
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fi
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else
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${LEX} $flags "$@"
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#
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# Did it succeed?
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#
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status=$?
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if [ $status -ne 0 ]
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then
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#
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# No. Get rid of any lex.yy.c file we generated, and
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# exit with the failing exit status.
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#
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rm -f lex.yy.c
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exit $status
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fi
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#
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# OK, rename lex.yy.c to the right output file.
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#
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mv lex.yy.c "$outfile"
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#
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# Did that succeed?
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#
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status=$?
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if [ $status -ne 0 ]
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then
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#
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# No. Get rid of any lex.yy.c file we generated, and
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# exit with the failing exit status.
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#
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rm -f lex.yy.c
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exit $status
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fi
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fi
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#
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# OK, now let's generate a header file declaring the relevant functions
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# defined by the .c file; if the .c file is .../foo.c, the header file
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# will be .../foo.h.
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#
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# This works around some other Flex suckage, wherein it doesn't declare
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# the lex routine before defining it, causing compiler warnings.
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# XXX - newer versions of Flex support --header-file=, to generate the
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# appropriate header file. With those versions, we should use that option.
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#
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#
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# Get the name of the prefix; scan the source files for a %option prefix
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# line. We use the last one.
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#
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prefix=`sed -n 's/%option[ ][ ]*prefix="\(.*\)".*/\1/p' "$@" | tail -1`
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if [ ! -z "$prefix" ]
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then
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prefixline="#define yylex ${prefix}lex"
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fi
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#
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# Construct the name of the header file.
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#
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header_file=`dirname "$outfile"`/`basename "$outfile" .c`.h
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#
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# Spew out the declaration.
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#
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cat <<EOF >$header_file
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/* This is generated by runlex.sh. Do not edit it. */
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$prefixline
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#ifndef YY_DECL
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#define YY_DECL int yylex(void)
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#endif
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YY_DECL;
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EOF
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