#! /bin/sh

IN="../update-pcre"

PCRE=$1

if [ "x$PCRE" = x -o "x$PCRE" = x--help -o "x$PCRE" = x-h ]; then

    cat >&2 << EOF

$0 PCRE-DIR

  Updates the local PCRE copy with a different version of the library,

  contained in the directory PCRE-DIR.

  This will delete the content of the local pcre directory, copy the

  necessary files from PCRE-DIR, and generate other needed files, such

  as Makefile.am

EOF

    exit

fi

if [ ! -f gregex.h ]; then

    echo "This script should be executed from the directory containing gregex.c." 2> /dev/null

    exit 1

fi

if [ ! -f $PCRE/Makefile.in -o ! -f $PCRE/pcre_compile.c ]; then

    echo "'$PCRE' does not contain a valid PCRE version." 2> /dev/null

    exit 1

fi

echo "Deleting old PCRE library"

mv pcre/.svn tmp-pcre-svn

rm -R pcre 2> /dev/null

mkdir pcre

cd pcre

# pcre_chartables.c is generated by dfatables.

# We do not want to compile and execute dfatables.c every time, because

# this could be a problem (e.g. when cross-compiling), so now generate

# the file and then distribuite it with GRegex.

echo "Generating pcre_chartables.c"

cp -R $PCRE tmp-build

cd tmp-build

./configure --enable-utf8 --enable-unicode-properties --disable-cpp > /dev/null

make pcre_chartables.c > /dev/null

cat > ../pcre_chartables.c << \EOF

/* This file is autogenerated by ../update-pcre/update.sh during

 * the update of the local copy of PCRE.

 */

EOF

cat pcre_chartables.c >> ../pcre_chartables.c

cd ..

rm -R tmp-build

# Compiled C files.

echo "Generating makefiles"

all_files=`awk '/^OBJ = /, /^\\s*$/ \

            { \

                sub("^OBJ = ", ""); \

                sub(".@OBJEXT@[[:blank:]]*\\\\\\\\", ""); \

                sub("\\\\$\\\\(POSIX_OBJ\\\\)", ""); \

                print; \

            }' \

            $PCRE/Makefile.in`

# Headers.

included_files="pcre.h pcre_internal.h ucp.h ucpinternal.h"

# Generate Makefile.am.

cat $IN/Makefile.am-1 > Makefile.am

for name in $all_files; do

    echo "	$name.c \\" >> Makefile.am

    if [ $name != pcre_chartables ]; then

        # pcre_chartables.c is a generated file.

        cp $PCRE/$name.c .

    fi

done

for f in $included_files; do

    echo "	$f \\" >> Makefile.am

    cp $PCRE/$f .

done

cat $IN/Makefile.am-2 >> Makefile.am

echo "Patching PCRE"

# Copy the license.

cp $PCRE/COPYING .

# Use glib for memory allocation.

patch > /dev/null < $IN/memory.patch

# Copy the modified version of pcre_valid_utf8.c.

cp $IN/pcre_valid_utf8.c .

# Copy the modified version of pcre_ucp_searchfuncs.c that uses glib

# for Unicode properties.

cp $IN/pcre_ucp_searchfuncs.c .

patch > /dev/null < $IN/ucp.patch

# Remove the digitab array in pcre_compile.c.

patch > /dev/null < $IN/digitab.patch

sed -i -e 's/(digitab\[\(.*\)\] & ctype_digit)/g_ascii_isdigit(\1)/' pcre_compile.c

sed -i -e 's/(digitab\[\(.*\)\] & ctype_xdigit)/g_ascii_isxdigit(\1)/' pcre_compile.c

# Reduce the number of relocations.

python $IN/make_utt.py

patch > /dev/null < $IN/utt.patch

patch > /dev/null < $IN/table-reduction.patch

# Copy back the old SVN directory.

mv ../tmp-pcre-svn .svn

cat << EOF

Update completed. You now should check that everything is working.

Remember to update the regex syntax doc with the new features

(docs/reference/glib/regex-syntax.sgml) and to run the tests.

EOF