From 4e4b2cbb3cfecf2faeb82442655b44bf306d1cce Mon Sep 17 00:00:00 2001
From: Sergey Elin <se@exante.eu>
Date: Thu, 28 Sep 2017 12:13:20 +0300
Subject: Fix point arithmetic in wx_impl.cpp for Erlang < 20.0

---
 kerl | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/kerl b/kerl
index b292ea3..f9297e8 100755
--- a/kerl
+++ b/kerl
@@ -482,6 +482,12 @@ maybe_patch_all()
             15)
                 apply_r15_beam_makeops_patch >> "$LOGFILE"
                 ;;
+            16)
+                apply_r16_wx_ptr_patch >> "$LOGFILE"
+                ;;
+            17|18|19)
+                apply_wx_ptr_patch >> "$LOGFILE"
+                ;;
             *)
                 ;;
         esac
@@ -1478,6 +1484,63 @@ apply_r15_beam_makeops_patch()
 _END_PATCH
 }
 
+#https://github.com/erlang/otp/commit/a64c4d806fa54848c35632114585ad82b98712e8.diff
+apply_wx_ptr_patch()
+{
+    patch -p1 <<'_END_PATCH'
+diff --git a/lib/wx/c_src/wxe_impl.cpp b/lib/wx/c_src/wxe_impl.cpp
+index 0d2da5d4a79..8118136d30e 100644
+--- a/lib/wx/c_src/wxe_impl.cpp
++++ b/lib/wx/c_src/wxe_impl.cpp
+@@ -666,7 +666,7 @@ void * WxeApp::getPtr(char * bp, wxeMemEnv *memenv) {
+     throw wxe_badarg(index);
+   }
+   void * temp = memenv->ref2ptr[index];
+-  if((index < memenv->next) && ((index == 0) || (temp > NULL)))
++  if((index < memenv->next) && ((index == 0) || (temp != (void *)NULL)))
+     return temp;
+   else {
+     throw wxe_badarg(index);
+@@ -678,7 +678,7 @@ void WxeApp::registerPid(char * bp, ErlDrvTermData pid, wxeMemEnv * memenv) {
+   if(!memenv)
+     throw wxe_badarg(index);
+   void * temp = memenv->ref2ptr[index];
+-  if((index < memenv->next) && ((index == 0) || (temp > NULL))) {
++  if((index < memenv->next) && ((index == 0) || (temp != (void *) NULL))) {
+     ptrMap::iterator it;
+     it = ptr2ref.find(temp);
+     if(it != ptr2ref.end()) {
+_END_PATCH
+}
+
+apply_r16_wx_ptr_patch()
+{
+    patch -p1 <<'_END_PATCH'
+diff --git a/lib/wx/c_src/wxe_impl.cpp b/lib/wx/c_src/wxe_impl.cpp
+index cc9bcc995..1b1912630 100644
+--- a/lib/wx/c_src/wxe_impl.cpp
++++ b/lib/wx/c_src/wxe_impl.cpp
+@@ -757,7 +757,7 @@ void * WxeApp::getPtr(char * bp, wxeMemEnv *memenv) {
+     throw wxe_badarg(index);
+   }
+   void * temp = memenv->ref2ptr[index];
+-  if((index < memenv->next) && ((index == 0) || (temp > NULL)))
++  if((index < memenv->next) && ((index == 0) || (temp != (void *)NULL)))
+     return temp;
+   else {
+     throw wxe_badarg(index);
+@@ -769,7 +769,7 @@ void WxeApp::registerPid(char * bp, ErlDrvTermData pid, wxeMemEnv * memenv) {
+   if(!memenv)
+     throw wxe_badarg(index);
+   void * temp = memenv->ref2ptr[index];
+-  if((index < memenv->next) && ((index == 0) || (temp > NULL))) {
++  if((index < memenv->next) && ((index == 0) || (temp != (void *)NULL))) {
+     ptrMap::iterator it;
+     it = ptr2ref.find(temp);
+     if(it != ptr2ref.end()) {
+_END_PATCH
+}
+
 case "$1" in
     version)
         echo "$KERL_VERSION"
-- 
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