Add support for pcre2. (#314)

* Add support for pcre2. Fixes: #272

Author: sebastic

.github/workflows/build-linux.yml

@@ -28,7 +28,7 @@ jobs:
             fi
             if [[ 'maximal' =~ ${{ matrix.option }} ]]
             then
-              sudo apt-get install -y libhiredis-dev libdb-dev libmapserver-dev
+              sudo apt-get install -y libhiredis-dev libdb-dev libmapserver-dev libpcre2-dev
             fi
 
         - name: Build MapCache
@@ -55,7 +55,8 @@ jobs:
                        -DWITH_TIFF=ON \
                        -DWITH_TIFF_WRITE_SUPPORT=ON \
                        -DWITH_GEOTIFF=ON \
-                       -DWITH_PCRE=ON \
+                       -DWITH_PCRE=OFF \
+                       -DWITH_PCRE2=ON \
                        -DWITH_MAPSERVER=ON \
                        -DWITH_RIAK=OFF"
             fi

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.0)
 
 project (MapCache C)
 
@@ -97,6 +97,7 @@ option(WITH_TIFF "Use TIFFs as a cache backend" OFF)
 option(WITH_TIFF_WRITE_SUPPORT "Enable (experimental) support for writable TIFF cache backends" OFF)
 option(WITH_GEOTIFF "Allow GeoTIFF metadata creation for TIFF cache backends" OFF)
 option(WITH_PCRE "Use PCRE for regex tests" OFF)
+option(WITH_PCRE2 "Use PCRE2 for regex tests" OFF)
 option(WITH_MAPSERVER "Enable (experimental) support for the mapserver library" OFF)
 option(WITH_RIAK "Use Riak as a cache backend" OFF)
 option(WITH_GDAL "Choose if GDAL raster support should be built in" ON)
@@ -205,6 +206,18 @@ if(WITH_PCRE)
   endif(PCRE_FOUND)
 endif (WITH_PCRE)
 
+if(WITH_PCRE2)
+  find_package(PCRE2)
+  if(PCRE2_FOUND)
+    include_directories(${PCRE2_INCLUDE_DIR})
+    target_link_libraries(mapcache PCRE2::PCRE2-8)
+    set (USE_PCRE2 1)
+    add_definitions(-DPCRE2_CODE_UNIT_WIDTH=8)
+  else(PCRE2_FOUND)
+    report_optional_not_found(PCRE2)
+  endif(PCRE2_FOUND)
+endif (WITH_PCRE2)
+
 if(WITH_SQLITE)
   find_package(SQLITE)
   if(SQLITE_FOUND)
@@ -357,6 +370,7 @@ status_optional_component("TIFF" "${USE_TIFF}" "${TIFF_LIBRARY}")
 status_optional_component("GeoTIFF" "${USE_GEOTIFF}" "${GEOTIFF_LIBRARY}")
 status_optional_component("Experimental TIFF write support" "${USE_TIFF_WRITE}" "${TIFF_LIBRARY}")
 status_optional_component("PCRE" "${USE_PCRE}" "${PCRE_LIBRARY}")
+status_optional_component("PCRE2" "${USE_PCRE2}" "${PCRE2-8_LIBRARY}")
 status_optional_component("Experimental mapserver support" "${USE_MAPSERVER}" "${MAPSERVER_LIBRARY}")
 status_optional_component("RIAK" "${USE_RIAK}" "${RIAK_LIBRARY}")
 status_optional_component("GDAL" "${USE_GDAL}" "${GDAL_LIBRARY}")

cmake/FindBerkeleyDB.cmake

@@ -83,5 +83,5 @@ endif (BERKELEYDB_FIND_VERSION AND BERKELEYDB_FOUND_TMP)
 set(BERKELEYDB_INCLUDE_DIRS ${BERKELEYDB_INCLUDE_DIR})
 set(BERKELEYDB_LIBRARIES ${BERKELEYDB_LIBRARY})
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(BERKELEYDB DEFAULT_MSG BERKELEYDB_LIBRARY BERKELEYDB_INCLUDE_DIR)
+find_package_handle_standard_args(BerkeleyDB DEFAULT_MSG BERKELEYDB_LIBRARY BERKELEYDB_INCLUDE_DIR)
 mark_as_advanced(BERKELEYDB_LIBRARY BERKELEYDB_INCLUDE_DIR)

cmake/FindPCRE2.cmake

@@ -0,0 +1,27 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file COPYING-CMAKE-SCRIPTS or https://cmake.org/licensing for details.
+
+#.rst
+# FindPCRE2
+# ~~~~~~~~~
+# Copyright (C) 2017-2018, Hiroshi Miura
+#
+# Find the native PCRE2 headers and libraries.
+
+find_path(PCRE2_INCLUDE_DIR NAMES pcre2.h)
+find_library(PCRE2-8_LIBRARY NAMES pcre2-8 pcre2-8d pcre2-8-static pcre2-8-staticd NAMES_PER_DIR)
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PCRE2
+                                  REQUIRED_VARS PCRE2-8_LIBRARY PCRE2_INCLUDE_DIR)
+mark_as_advanced(PCRE2_INCLUDE_DIR PCRE2-8_LIBRARY)
+if(PCRE2_FOUND)
+    list(APPEND PCRE2_LIBRARIES "${PCRE2-8_LIBRARY}")
+    set(PCRE2_INCLUDE_DIRS "${PCRE2_INCLUDE_DIR}")
+    if(NOT TARGET PCRE2::PCRE2-8)
+        add_library(PCRE2::PCRE2-8 UNKNOWN IMPORTED)
+        set_target_properties(PCRE2::PCRE2-8 PROPERTIES
+                              INTERFACE_INCLUDE_DIRECTORIES "${PCRE2_INCLUDE_DIR}"
+                              IMPORTED_LINK_INTERFACE_LANGUAGES "C"
+                              IMPORTED_LOCATION "${PCRE2-8_LIBRARY}")
+    endif()
+endif()

cmake/FindPixman.cmake

@@ -21,5 +21,5 @@ FIND_LIBRARY(PIXMAN_LIBRARY
 set(PIXMAN_INCLUDE_DIRS ${PIXMAN_INCLUDE_DIR})
 set(PIXMAN_LIBRARIES ${PIXMAN_LIBRARY})
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(PIXMAN DEFAULT_MSG PIXMAN_LIBRARY PIXMAN_INCLUDE_DIR)
+find_package_handle_standard_args(Pixman DEFAULT_MSG PIXMAN_LIBRARY PIXMAN_INCLUDE_DIR)
 mark_as_advanced(PIXMAN_LIBRARY PIXMAN_INCLUDE_DIR)

include/mapcache-config.h.in

@@ -13,6 +13,7 @@
 #cmakedefine USE_TIFF_WRITE 1
 #cmakedefine USE_GEOTIFF 1
 #cmakedefine USE_PCRE 1
+#cmakedefine USE_PCRE2 1
 #cmakedefine USE_MAPSERVER 1
 #cmakedefine USE_RIAK 1
 #cmakedefine USE_GDAL 1

lib/dimension.c

@@ -31,7 +31,9 @@
 #include <apr_strings.h>
 #include <math.h>
 #include <sys/types.h>
-#ifdef USE_PCRE
+#if defined(USE_PCRE2)
+#include <pcre2.h>
+#elif defined(USE_PCRE)
 #include <pcre.h>
 #else
 #include <regex.h>
@@ -51,7 +53,9 @@ struct mapcache_dimension_values {
 struct mapcache_dimension_regex {
   mapcache_dimension dimension;
   char *regex_string;
-#ifdef USE_PCRE
+#if defined(USE_PCRE2)
+  pcre2_code *pcregex;
+#elif defined(USE_PCRE)
   pcre *pcregex;
 #else
   regex_t *regex;
@@ -127,7 +131,13 @@ static apr_array_header_t* _mapcache_dimension_regex_get_entries_for_value(mapca
 {
   mapcache_dimension_regex *dimension = (mapcache_dimension_regex*)dim;
   apr_array_header_t *values = apr_array_make(ctx->pool,1,sizeof(char*));
-#ifdef USE_PCRE
+#if defined(USE_PCRE2)
+  pcre2_match_data *match_data;
+  int rc = pcre2_match(dimension->pcregex,(PCRE2_SPTR)value,strlen(value),0,0,match_data,NULL);
+  if(rc>0) {
+    APR_ARRAY_PUSH(values,char*) = apr_pstrdup(ctx->pool,value);
+  }
+#elif defined(USE_PCRE)
   int ovector[30];
   int rc = pcre_exec(dimension->pcregex,NULL,value,strlen(value),0,0,ovector,30);
   if(rc>0) {
@@ -168,7 +178,18 @@ static void _mapcache_dimension_regex_parse_xml(mapcache_context *ctx, mapcache_
     ctx->set_error(ctx,400,"failed to parse %s regex: no <regex> child supplied",dim->class_name);
     return;
   }
-#ifdef USE_PCRE
+#if defined(USE_PCRE2)
+  {
+    int pcre_err;
+    PCRE2_SIZE *pcre_offset;
+    dimension->pcregex = pcre2_compile((PCRE2_SPTR8)dimension->regex_string,strlen(dimension->regex_string), 0, &pcre_err, pcre_offset, NULL);
+    if(!dimension->pcregex) {
+      ctx->set_error(ctx,400,"failed to compile regular expression \"%s\" for %s \"%s\": %d",
+                     dimension->regex_string,dim->class_name,dim->name,pcre_err);
+      return;
+    }
+  }
+#elif defined(USE_PCRE)
   {
     const char *pcre_err;
     int pcre_offset;
@@ -294,7 +315,7 @@ mapcache_dimension* mapcache_dimension_regex_create(mapcache_context *ctx, apr_p
   mapcache_dimension_regex *dimension = apr_pcalloc(pool, sizeof(mapcache_dimension_regex));
   dimension->dimension.type = MAPCACHE_DIMENSION_REGEX;
   dimension->dimension.class_name = "dimension";
-#ifndef USE_PCRE
+#if !defined(USE_PCRE) && !defined(USE_PCRE2)
   dimension->regex = (regex_t*)apr_pcalloc(pool, sizeof(regex_t));
 #endif
   dimension->dimension._get_entries_for_value = _mapcache_dimension_regex_get_entries_for_value;