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#!/bin/sh
#
# Copyright (c) 2014-2015 Mike Frysinger <vapier@gentoo.org>
# Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
# Copyright (c) 2014-2017 The strace developers.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. 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.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
usage()
{
cat <<EOF
Usage: $0 <input> <output>
Generate xlat header files from <input> (a file or dir of files) and write
the generated headers to <output>.
EOF
exit 1
}
cond_def()
{
local line
line="$1"; shift
local val
val="$(printf %s "$line" |
sed -r -n 's/^([^[:space:]]+).*$/\1/p')"
local def
def="$(printf %s "${line}" |
sed -r -n 's/^[^[:space:]]+[[:space:]]+([^[:space:]].*)$/\1/p')"
if [ -n "$def" ]; then
cat <<-EOF
#if !(defined($val) || (defined(HAVE_DECL_$val) && HAVE_DECL_$val))
# define $val $def
#endif
EOF
fi
}
print_xlat()
{
local val
val="$1"; shift
if [ -z "${val_type-}" ]; then
echo " XLAT(${val}),"
else
echo " XLAT_TYPE(${val_type}, ${val}),"
fi
}
print_xlat_pair()
{
local val str
val="$1"; shift
str="$1"; shift
if [ -z "${val_type-}" ]; then
echo " XLAT_PAIR(${val}, \"${str}\"),"
else
echo " XLAT_TYPE_PAIR(${val_type}, ${val}, \"${str}\"),"
fi
}
cond_xlat()
{
local line val m def xlat
line="$1"; shift
val="$(printf %s "${line}" | sed -r -n 's/^([^[:space:]]+).*$/\1/p')"
m="${val%%|*}"
def="$(printf %s "${line}" |
sed -r -n 's/^[^[:space:]]+[[:space:]]+([^[:space:]].*)$/\1/p')"
if [ "${m}" = "${m#1<<}" ]; then
xlat="$(print_xlat "${val}")"
else
xlat="$(print_xlat_pair "1ULL<<${val#1<<}" "${val}")"
m="${m#1<<}"
fi
if [ -z "${def}" ]; then
cat <<-EOF
#if defined(${m}) || (defined(HAVE_DECL_${m}) && HAVE_DECL_${m})
${xlat}
#endif
EOF
else
echo "$xlat"
fi
}
gen_header()
{
local input="$1" output="$2" name="$3"
echo "generating ${output}"
(
local defs="${0%/*}/../defs.h"
local mpers="${0%/*}/../mpers_xlat.h"
local decl="extern const struct xlat ${name}[];"
local in_defs= in_mpers=
if grep -F -x "$decl" "$defs" > /dev/null; then
in_defs=1
elif grep -F -x "$decl" "$mpers" > /dev/null; then
in_mpers=1
fi
echo "/* Generated by $0 from $1; do not edit. */"
local unconditional= unterminated= line
# 1st pass: output directives.
while read line; do
LC_COLLATE=C
case $line in
'#stop')
exit 0
;;
'#conditional')
unconditional=
;;
'#unconditional')
unconditional=1
;;
'#unterminated')
unterminated=1
;;
'#val_type '*)
# to be processed during 2nd pass
;;
'#'*)
echo "${line}"
;;
[A-Z_]*)
[ -n "$unconditional" ] ||
cond_def "$line"
;;
esac
done < "$input"
echo
if [ -n "$in_defs" ]; then
cat <<-EOF
#ifndef IN_MPERS
EOF
elif [ -n "$in_mpers" ]; then
cat <<-EOF
#ifdef IN_MPERS
${decl}
#else
# if !(defined HAVE_M32_MPERS || defined HAVE_MX32_MPERS)
static
# endif
EOF
else
cat <<-EOF
#ifdef IN_MPERS
# error static const struct xlat ${name} in mpers mode
#else
static
EOF
fi
echo "const struct xlat ${name}[] = {"
unconditional= val_type=
# 2nd pass: output everything.
while read line; do
LC_COLLATE=C
case ${line} in
'#conditional')
unconditional=
;;
'#unconditional')
unconditional=1
;;
'#unterminated')
# processed during 1st pass
;;
'#val_type '*)
val_type="${line#\#val_type }"
;;
[A-Z_]*) # symbolic constants
if [ -n "${unconditional}" ]; then
print_xlat "${line}"
else
cond_xlat "${line}"
fi
;;
'1<<'[A-Z_]*) # symbolic constants with shift
if [ -n "${unconditional}" ]; then
print_xlat_pair "1ULL<<${line#1<<}" "${line}"
else
cond_xlat "${line}"
fi
;;
[0-9]*) # numeric constants
print_xlat "${line}"
;;
*) # verbatim lines
echo "${line}"
;;
esac
done < "${input}"
if [ -n "${unterminated}" ]; then
echo " /* this array should remain not NULL-terminated */"
else
echo " XLAT_END"
fi
cat <<-EOF
};
#endif /* !IN_MPERS */
EOF
) >"${output}"
}
gen_make()
{
local output="$1"
local name
shift
echo "generating ${output}"
(
printf "XLAT_INPUT_FILES = "
printf 'xlat/%s.in ' "$@"
echo
printf "XLAT_HEADER_FILES = "
printf 'xlat/%s.h ' "$@"
echo
for name; do
printf '$(top_srcdir)/xlat/%s.h: $(top_srcdir)/xlat/%s.in $(top_srcdir)/xlat/gen.sh\n' \
"${name}" "${name}"
echo ' $(AM_V_GEN)$(top_srcdir)/xlat/gen.sh $< $@'
done
) >"${output}"
}
gen_git()
{
local output="$1"
shift
echo "generating ${output}"
(
printf '/%s\n' .gitignore Makemodule.am
printf '/%s.h\n' "$@"
) >"${output}"
}
main()
{
case $# in
0) set -- "${0%/*}" "${0%/*}" ;;
2) ;;
*) usage ;;
esac
local input="$1"
local output="$2"
local name
local jobs=0
local ncpus="$(getconf _NPROCESSORS_ONLN)"
local pids=
[ "${ncpus}" -ge 1 ] ||
ncpus=1
if [ -d "${input}" ]; then
local f names=
for f in "${input}"/*.in; do
[ -f "${f}" ] || continue
name=${f##*/}
name=${name%.in}
gen_header "${f}" "${output}/${name}.h" "${name}" &
pids="$pids $!"
names="${names} ${name}"
: $(( jobs += 1 ))
if [ "${jobs}" -gt "$(( ncpus * 2 ))" ]; then
read wait_pid rest
pids="$rest"
wait -n 2>/dev/null || wait "$wait_pid"
: $(( jobs -= 1 ))
fi <<- EOF
$pids
EOF
done
gen_git "${output}/.gitignore" ${names} &
gen_make "${output}/Makemodule.am" ${names} &
wait
else
name=${input##*/}
name=${name%.in}
gen_header "${input}" "${output}" "${name}"
fi
}
main "$@"
|