MT#60923 Switch from PCRE to RE2

The old PCRE library provided C++ bindings created by Google, but with
the new PCRE2 library those bindings have not been ported, instead
Google created a new project called RE2, which is a successor of those
bindings, although it does no longer use the PCRE library underneath,
so some of its features are no longer available.

Change-Id: I77ccbe617ea1fb9c2e5495fc38ddf3760f2c8014

apps/sw_vsc/Makefile

@@ -1,7 +1,7 @@
 plug_in_name = sw_vsc
 
-module_ldflags = -lmysqlclient `pcre-config --libs` -lpcrecpp
-module_cflags  = -I/usr/include/mysql `pcre-config --cflags`
+module_ldflags = -lmysqlclient `pkg-config --libs re2`
+module_cflags  = -I/usr/include/mysql `pkg-config --cflags re2`
 module_extra_objs =
 
 extra_install = $(plug_in_name)_audio

apps/sw_vsc/SW_Vsc.cpp

@@ -1,5 +1,5 @@
-#include <pcrecpp.h>
-using namespace pcrecpp;
+#include <re2/re2.h>
+using namespace re2;
 
 #include "SW_Vsc.h"
 #include "AmConfig.h"
@@ -574,7 +574,6 @@ int SW_VscDialog::number2uri(const AmSipRequest &req, MYSQL *my_handler,
     my_ulonglong num_rows;
     MYSQL_RES *res;
     MYSQL_ROW row;
-    RE *re;
 
     if (req.user.compare(0, 1, "*", 1) == 0)
     {
@@ -695,24 +694,21 @@ int SW_VscDialog::number2uri(const AmSipRequest &req, MYSQL *my_handler,
                 return 0;
             }
 
-            re = new RE(row[0]);
-            if (re == NULL || re->error().length() > 0)
+            RE2 re(row[0]);
+            if (re.error().length() > 0)
             {
                 ERROR("A callee rewrite rule match pattern ('%s') failed to compile: %s\n",
-                      row[0], (re ? re->error().c_str() : "unknown"));
-                if (re) delete re;
+                      row[0], re.error().c_str());
                 mysql_free_result(res);
                 return 0;
             }
-            if (re->Replace(row[1], &num))
+            if (RE2::Replace(&num, re, row[1]))
             {
                 INFO("The callee rewrite rule pattern ('%s' and '%s') for subscriber id %llu and domain id %llu matched, result is '%s'\n",
                      row[0], row[1], (unsigned long long int)subId,
                      (unsigned long long int)domId, num.c_str());
-                delete re;
                 break;
             }
-            delete re;
         }
 
         mysql_free_result(res);
@@ -731,22 +727,18 @@ int SW_VscDialog::number2uri(const AmSipRequest &req, MYSQL *my_handler,
         if (!getPreference(my_handler, subId, ccAttId, &foundPref, &ccStr))
             return 0;
 
-        re = new RE("\\$avp\\(s:caller_ac\\)");
-        if (re->GlobalReplace(acStr, &num))
+        if (RE2::GlobalReplace(&num, "\\$avp\\(s:caller_ac\\)", acStr))
         {
             INFO("Successfully replaced $avp(s:caller_ac) by preference value '%s' for subscriber id %llu and domain id %llu",
                  acStr.c_str(), (unsigned long long int)subId,
                  (unsigned long long int)domId);
         }
-        delete re;
-        re = new RE("\\$avp\\(s:caller_cc\\)");
-        if (re->GlobalReplace(ccStr, &num))
+        if (RE2::GlobalReplace(&num, "\\$avp\\(s:caller_cc\\)", ccStr))
         {
             INFO("Successfully replaced $avp(s:caller_cc) by preference value '%s' for subscriber id %llu and domain id %llu",
                  ccStr.c_str(), (unsigned long long int)subId,
                  (unsigned long long int)domId);
         }
-        delete re;
 
         INFO("Final normalized number is '%s' for subscriber id %llu and domain id %llu",
              num.c_str(), (unsigned long long int)subId,

debian/control

@@ -14,12 +14,13 @@ Build-Depends:
  libhiredis-dev,
  libmysql++-dev,
  libopus-dev,
- libpcre3-dev,
+ libre2-dev,
  libspandsp-dev,
  libspeex-dev,
  libssl-dev,
  libxml2-dev,
  openssl,
+ pkgconf,
  python3,
  python3-dev,