Dmitry V. Levin
6e0b6a6665
* xlat/gen.sh: Implement #stop directive that stops preprocessor at the line it has been encountered during the first pass. This could be used, for example, to provide fallback definitions for constants without defining xlat tables.
320 lines
6.5 KiB
Bash
Executable File
320 lines
6.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2014-2015 Mike Frysinger <vapier@gentoo.org>
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# Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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usage()
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{
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cat <<EOF
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Usage: $0 <input> <output>
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Generate xlat header files from <input> (a file or dir of files) and write
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the generated headers to <output>.
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EOF
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exit 1
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}
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cond_def()
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{
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local line
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line="$1"; shift
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local val
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val="$(printf %s "$line" |
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sed -r -n 's/^([^[:space:]]+).*$/\1/p')"
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local def
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def="$(printf %s "${line}" |
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sed -r -n 's/^[^[:space:]]+[[:space:]]+([^[:space:]].*)$/\1/p')"
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if [ -n "$def" ]; then
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cat <<-EOF
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#if !(defined($val) || (defined(HAVE_DECL_$val) && HAVE_DECL_$val))
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# define $val $def
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#endif
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EOF
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fi
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}
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print_xlat()
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{
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local val
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val="$1"; shift
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if [ -z "${val_type-}" ]; then
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echo " XLAT(${val}),"
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else
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echo " XLAT_TYPE(${val_type}, ${val}),"
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fi
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}
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print_xlat_pair()
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{
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local val str
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val="$1"; shift
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str="$1"; shift
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if [ -z "${val_type-}" ]; then
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echo " XLAT_PAIR(${val}, \"${str}\"),"
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else
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echo " XLAT_TYPE_PAIR(${val_type}, ${val}, \"${str}\"),"
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fi
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}
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cond_xlat()
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{
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local line val m def xlat
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line="$1"; shift
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val="$(printf %s "${line}" | sed -r -n 's/^([^[:space:]]+).*$/\1/p')"
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m="${val%%|*}"
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def="$(printf %s "${line}" |
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sed -r -n 's/^[^[:space:]]+[[:space:]]+([^[:space:]].*)$/\1/p')"
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if [ "${m}" = "${m#1<<}" ]; then
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xlat="$(print_xlat "${val}")"
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else
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xlat="$(print_xlat_pair "1ULL<<${val#1<<}" "${val}")"
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m="${m#1<<}"
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fi
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if [ -z "${def}" ]; then
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cat <<-EOF
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#if defined(${m}) || (defined(HAVE_DECL_${m}) && HAVE_DECL_${m})
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${xlat}
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#endif
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EOF
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else
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echo "$xlat"
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fi
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}
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gen_header()
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{
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local input="$1" output="$2" name="$3"
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echo "generating ${output}"
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(
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local defs="${0%/*}/../defs.h"
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local mpers="${0%/*}/../mpers_xlat.h"
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local decl="extern const struct xlat ${name}[];"
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local in_defs= in_mpers=
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if grep -F -x "$decl" "$defs" > /dev/null; then
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in_defs=1
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elif grep -F -x "$decl" "$mpers" > /dev/null; then
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in_mpers=1
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fi
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echo "/* Generated by $0 from $1; do not edit. */"
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local unconditional= unterminated= line
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# 1st pass: output directives.
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while read line; do
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LC_COLLATE=C
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case $line in
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'#stop')
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exit 0
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;;
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'#conditional')
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unconditional=
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;;
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'#unconditional')
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unconditional=1
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;;
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'#unterminated')
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unterminated=1
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;;
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'#val_type '*)
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# to be processed during 2nd pass
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;;
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'#'*)
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echo "${line}"
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;;
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[A-Z_]*)
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[ -n "$unconditional" ] ||
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cond_def "$line"
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;;
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esac
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done < "$input"
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echo
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if [ -n "$in_defs" ]; then
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cat <<-EOF
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#ifndef IN_MPERS
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EOF
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elif [ -n "$in_mpers" ]; then
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cat <<-EOF
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#ifdef IN_MPERS
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${decl}
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#else
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# if !(defined HAVE_M32_MPERS || defined HAVE_MX32_MPERS)
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static
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# endif
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EOF
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else
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cat <<-EOF
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#ifdef IN_MPERS
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# error static const struct xlat ${name} in mpers mode
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#else
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static
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EOF
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fi
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echo "const struct xlat ${name}[] = {"
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unconditional= val_type=
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# 2nd pass: output everything.
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while read line; do
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LC_COLLATE=C
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case ${line} in
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'#conditional')
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unconditional=
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;;
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'#unconditional')
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unconditional=1
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;;
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'#unterminated')
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# processed during 1st pass
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;;
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'#val_type '*)
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val_type="${line#\#val_type }"
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;;
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[A-Z_]*) # symbolic constants
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if [ -n "${unconditional}" ]; then
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print_xlat "${line}"
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else
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cond_xlat "${line}"
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fi
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;;
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'1<<'[A-Z_]*) # symbolic constants with shift
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if [ -n "${unconditional}" ]; then
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print_xlat_pair "1ULL<<${line#1<<}" "${line}"
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else
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cond_xlat "${line}"
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fi
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;;
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[0-9]*) # numeric constants
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print_xlat "${line}"
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;;
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*) # verbatim lines
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echo "${line}"
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;;
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esac
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done < "${input}"
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if [ -n "${unterminated}" ]; then
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echo " /* this array should remain not NULL-terminated */"
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else
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echo " XLAT_END"
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fi
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cat <<-EOF
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};
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#endif /* !IN_MPERS */
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EOF
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) >"${output}"
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}
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gen_make()
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{
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local output="$1"
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local name
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shift
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echo "generating ${output}"
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(
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printf "XLAT_INPUT_FILES = "
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printf 'xlat/%s.in ' "$@"
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echo
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printf "XLAT_HEADER_FILES = "
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printf 'xlat/%s.h ' "$@"
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echo
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for name; do
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printf '$(top_srcdir)/xlat/%s.h: $(top_srcdir)/xlat/%s.in $(top_srcdir)/xlat/gen.sh\n' \
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"${name}" "${name}"
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echo ' $(AM_V_GEN)$(top_srcdir)/xlat/gen.sh $< $@'
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done
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) >"${output}"
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}
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gen_git()
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{
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local output="$1"
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shift
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echo "generating ${output}"
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(
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printf '/%s\n' .gitignore Makemodule.am
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printf '/%s.h\n' "$@"
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) >"${output}"
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}
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main()
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{
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case $# in
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0) set -- "${0%/*}" "${0%/*}" ;;
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2) ;;
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*) usage ;;
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esac
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local input="$1"
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local output="$2"
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local name
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local jobs=0
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local ncpus="$(getconf _NPROCESSORS_ONLN)"
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[ "${ncpus}" -ge 1 ] ||
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ncpus=1
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if [ -d "${input}" ]; then
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local f names=
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for f in "${input}"/*.in; do
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[ -f "${f}" ] || continue
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name=${f##*/}
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name=${name%.in}
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gen_header "${f}" "${output}/${name}.h" "${name}" &
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names="${names} ${name}"
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: $(( jobs += 1 ))
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if [ ${jobs} -ge ${ncpus} ]; then
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jobs=0
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wait
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fi
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done
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gen_git "${output}/.gitignore" ${names}
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gen_make "${output}/Makemodule.am" ${names}
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wait
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else
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name=${input##*/}
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name=${name%.in}
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gen_header "${input}" "${output}" "${name}"
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fi
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}
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main "$@"
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