From a4d2a19e01d9e8c5fca9dbb177c9f928895974d6 Mon Sep 17 00:00:00 2001
From: "K.Kosako" <kosako@sofnec.co.jp>
Date: Thu, 8 Feb 2018 14:56:41 +0900
Subject: [PATCH] add onig_initialize_callout()

---
 src/regcomp.c |  3 ++-
 src/regexec.c | 22 ++++++++++++++++++++++
 src/regint.h  |  1 +
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/regcomp.c b/src/regcomp.c
index cb4d0f5..d12ac54 100644
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -6274,7 +6274,8 @@ onig_initialize(OnigEncoding encodings[], int n)
       return r;
   }
 
-  return 0;
+  r = onig_initialize_callout();
+  return r;
 }
 
 typedef struct EndCallListItem {
diff --git a/src/regexec.c b/src/regexec.c
index ade4fda..b382699 100644
--- a/src/regexec.c
+++ b/src/regexec.c
@@ -4857,3 +4857,25 @@ onig_get_used_stack_size_in_callout(OnigCalloutArgs* args, int* used_num, int* u
 
   return ONIG_NORMAL;
 }
+
+extern int
+onig_builtin_fail(OnigCalloutArgs* args, void* user_data)
+{
+  return ONIG_CALLOUT_FAIL;
+}
+
+extern int
+onig_initialize_callout(void)
+{
+#define B1(name, func)  do {\
+  r = onig_set_callout_of_name(0, (UChar* )#name, (UChar* )(#name + strlen(#name)),\
+                               onig_builtin_ ## func, 0);\
+  if (r != ONIG_NORMAL) return r;\
+} while(0)
+
+  int r;
+
+  B1(FAIL, fail);
+
+  return ONIG_NORMAL;
+}
diff --git a/src/regint.h b/src/regint.h
index 4dd4ee5..d0a285d 100644
--- a/src/regint.h
+++ b/src/regint.h
@@ -780,6 +780,7 @@ extern int    onig_ext_set_pattern(regex_t* reg, const UChar* pattern, const UCh
 
 extern OnigCalloutFunc onig_get_callout_func_from_id(int id);
 extern OnigCalloutFunc onig_get_retraction_callout_func_from_id(int id);
+extern int onig_initialize_callout(void);
 
 /* strend hash */
 typedef void hash_table_type;
-- 
2.40.0