QRegularExpression: infrastructure for importing PCRE in 3rdparty/

Added the necessary files for importing and compiling PCRE under
3rdparty/, including a small shell script to ease the import
and the update of PCRE from its dist tarball.

PCRE's config.h is used, but it is assumed that a global
  s/HAVE_CONFIG_H/PCRE_HAVE_CONFIG_H/g
was run on PCRE source files to avoid polluting QtCore
compilation with -DHAVE_CONFIG_H (the aforementioned shell script
performs this substitution; therefore, -DPCRE_HAVE_CONFIG_H
is added instead to the compiler's command line).

Change-Id: Ic0f23526ebf5f770aefdffc8f688e5816c28fd8c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

src/3rdparty/pcre.pri

@@ -0,0 +1,38 @@
+DEFINES += PCRE_HAVE_CONFIG_H
+
+# man 3 pcrejit for a list of supported platforms;
+# as PCRE 8.30, stable JIT support is available for:
+# - ARM v5, v7, and Thumb2
+# - x86/x86-64
+# - MIPS 32bit
+equals(QT_ARCH, "i386")|equals(QT_ARCH, "x86_64")|equals(QT_ARCH, "arm")|if(equals(QT_ARCH, "mips"):!*-64) {
+    DEFINES += SUPPORT_JIT
+}
+
+win32:DEFINES += PCRE_STATIC
+
+INCLUDEPATH += $$PWD/pcre
+SOURCES += \
+    $$PWD/pcre/pcre16_byte_order.c \
+    $$PWD/pcre/pcre16_chartables.c \
+    $$PWD/pcre/pcre16_compile.c \
+    $$PWD/pcre/pcre16_config.c \
+    $$PWD/pcre/pcre16_dfa_exec.c \
+    $$PWD/pcre/pcre16_exec.c \
+    $$PWD/pcre/pcre16_fullinfo.c \
+    $$PWD/pcre/pcre16_get.c \
+    $$PWD/pcre/pcre16_globals.c \
+    $$PWD/pcre/pcre16_jit_compile.c \
+    $$PWD/pcre/pcre16_maketables.c \
+    $$PWD/pcre/pcre16_newline.c \
+    $$PWD/pcre/pcre16_ord2utf16.c \
+    $$PWD/pcre/pcre16_refcount.c \
+    $$PWD/pcre/pcre16_string_utils.c \
+    $$PWD/pcre/pcre16_study.c \
+    $$PWD/pcre/pcre16_tables.c \
+    $$PWD/pcre/pcre16_ucd.c \
+    $$PWD/pcre/pcre16_utf16_utils.c \
+    $$PWD/pcre/pcre16_valid_utf16.c \
+    $$PWD/pcre/pcre16_version.c \
+    $$PWD/pcre/pcre16_xclass.c
+

src/3rdparty/pcre/config.h

@@ -0,0 +1,15 @@
+#define HAVE_MEMMOVE 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STRING_H 1
+
+#define LINK_SIZE 2
+#define MATCH_LIMIT 10000000
+#define MATCH_LIMIT_RECURSION MATCH_LIMIT
+#define MAX_NAME_COUNT 10000
+#define MAX_NAME_SIZE 32
+#define NEWLINE 10
+
+#define POSIX_MALLOC_THRESHOLD 10
+#define SUPPORT_UCP
+#define SUPPORT_UTF16
+

src/3rdparty/pcre/import_from_pcre_tarball.sh

@@ -0,0 +1,153 @@
+#! /bin/sh
+#############################################################################
+##
+## Copyright (C) 2012 Giuseppe D'Angelo <dangelog@gmail.com>.
+## Contact: http://www.qt-project.org/
+##
+## This file is the build configuration utility of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:LGPL$
+## GNU Lesser General Public License Usage
+## This file may be used under the terms of the GNU Lesser General Public
+## License version 2.1 as published by the Free Software Foundation and
+## appearing in the file LICENSE.LGPL included in the packaging of this
+## file. Please review the following information to ensure the GNU Lesser
+## General Public License version 2.1 requirements will be met:
+## http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+##
+## In addition, as a special exception, Nokia gives you certain additional
+## rights. These rights are described in the Nokia Qt LGPL Exception
+## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU General
+## Public License version 3.0 as published by the Free Software Foundation
+## and appearing in the file LICENSE.GPL included in the packaging of this
+## file. Please review the following information to ensure the GNU General
+## Public License version 3.0 requirements will be met:
+## http://www.gnu.org/copyleft/gpl.html.
+##
+## Other Usage
+## Alternatively, this file may be used in accordance with the terms and
+## conditions contained in a signed written agreement between you and Nokia.
+##
+##
+##
+##
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+# This is a small script to copy the required files from a PCRE tarball
+# into 3rdparty/pcre/ , following the instructions found in the NON-UNIX-USE
+# file. Documentation, tests, demos etc. are not imported.
+# Also, a global s/HAVE_CONFIG_H/PCRE_HAVE_CONFIG_H/g is performed, to avoid
+# tampering QtCore compilation with a -DHAVE_CONFIG_H.
+
+if [ $# -ne 2 ]; then
+    echo "Usage: $0 pcre_tarball_dir/ \$QTDIR/src/3rdparty/pcre/"
+    exit 1
+fi
+
+PCRE_DIR=$1
+TARGET_DIR=$2
+
+if [ ! -d "$PCRE_DIR" -o ! -r "$PCRE_DIR" -o ! -d "$TARGET_DIR" -o ! -w "$TARGET_DIR" ]; then
+    echo "Either the PCRE source dir or the target dir do not exist,"
+    echo "are not directories or have the wrong permissions."
+    exit 2
+fi
+
+# with 1 argument, copies PCRE_DIR/$1 to TARGET_DIR/$1
+# with 2 arguments, copies PCRE_DIR/$1 to TARGET_DIR/$2
+# every file copied gets a s/HAVE_CONFIG_H/PCRE_HAVE_CONFIG_H/g
+copy_and_convert_file() {
+    if [ $# -lt 1 -o $# -gt 2  ]; then
+        echo "Wrong number of arguments to copy_and_convert_file"
+        exit 3
+    fi
+
+    SOURCE_FILE=$1
+    if [ -n "$2" ]; then
+        DEST_FILE=$2
+    else
+        DEST_FILE=$1
+    fi
+
+    mkdir -p "$TARGET_DIR/$(dirname "$SOURCE_FILE")"
+    sed 's/HAVE_CONFIG_H/PCRE_HAVE_CONFIG_H/g' < "$PCRE_DIR/$SOURCE_FILE" > "$TARGET_DIR/$DEST_FILE"
+}
+
+copy_and_convert_file "pcre.h.generic" "pcre.h"
+copy_and_convert_file "pcre_chartables.c.dist" "pcre_chartables.c"
+
+FILES="
+    AUTHORS
+    COPYING
+    LICENCE
+    pcre_internal.h
+    ucp.h
+    pcre_byte_order.c
+    pcre_compile.c
+    pcre_config.c
+    pcre_dfa_exec.c
+    pcre_exec.c
+    pcre_fullinfo.c
+    pcre_get.c
+    pcre_globals.c
+    pcre_jit_compile.c
+    pcre_maketables.c
+    pcre_newline.c
+    pcre_ord2utf8.c
+    pcre_refcount.c
+    pcre_string_utils.c
+    pcre_study.c
+    pcre_tables.c
+    pcre_ucd.c
+    pcre_valid_utf8.c
+    pcre_version.c
+    pcre_xclass.c
+    pcre16_byte_order.c
+    pcre16_chartables.c
+    pcre16_compile.c
+    pcre16_config.c
+    pcre16_dfa_exec.c
+    pcre16_exec.c
+    pcre16_fullinfo.c
+    pcre16_get.c
+    pcre16_globals.c
+    pcre16_jit_compile.c
+    pcre16_maketables.c
+    pcre16_newline.c
+    pcre16_ord2utf16.c
+    pcre16_refcount.c
+    pcre16_string_utils.c
+    pcre16_study.c
+    pcre16_tables.c
+    pcre16_ucd.c
+    pcre16_utf16_utils.c
+    pcre16_valid_utf16.c
+    pcre16_version.c
+    pcre16_xclass.c
+    sljit/sljitLir.c
+    sljit/sljitLir.h
+    sljit/sljitNativePPC_common.c
+    sljit/sljitNativeX86_common.c
+    sljit/sljitNativeARM_v5.c
+    sljit/sljitNativeX86_32.c
+    sljit/sljitNativeX86_64.c
+    sljit/sljitNativePPC_32.c
+    sljit/sljitNativePPC_64.c
+    sljit/sljitConfig.h
+    sljit/sljitNativeMIPS_32.c
+    sljit/sljitUtils.c
+    sljit/sljitNativeMIPS_common.c
+    sljit/sljitExecAllocator.c
+    sljit/sljitConfigInternal.h
+    sljit/sljitNativeARM_Thumb2.c
+"
+
+for i in $FILES; do
+    copy_and_convert_file "$i"
+done