From 655556823adb6e996a0695de84b4e01338902f83 Mon Sep 17 00:00:00 2001
From: "K.Kosako" <kosako@sofnec.co.jp>
Date: Fri, 2 Mar 2018 17:27:28 +0900
Subject: [PATCH] implement encoding initialized list

---
 src/regcomp.c |  2 ++
 src/regenc.c  | 71 ++++++++++++++++++++++++++++++++++++++++++++++++---
 src/regenc.h  |  1 +
 3 files changed, 71 insertions(+), 3 deletions(-)

diff --git a/src/regcomp.c b/src/regcomp.c
index 8026e79..7c35b43 100644
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -6304,6 +6304,8 @@ onig_end(void)
   onig_global_callout_names_free();
 #endif
 
+  onigenc_end();
+
   onig_inited = 0;
 
   return 0;
diff --git a/src/regenc.c b/src/regenc.c
index 7f572de..7333cdd 100644
--- a/src/regenc.c
+++ b/src/regenc.c
@@ -31,6 +31,66 @@
 
 OnigEncoding OnigEncDefaultCharEncoding = ONIG_ENCODING_INIT_DEFAULT;
 
+#define INITED_LIST_SIZE  20
+
+static int InitedListNum;
+
+static struct {
+  OnigEncoding enc;
+  int          inited;
+} InitedList[INITED_LIST_SIZE];
+
+static int
+enc_inited_entry(OnigEncoding enc)
+{
+  int i;
+
+  for (i = 0; i < InitedListNum; i++) {
+    if (InitedList[i].enc == enc) {
+      InitedList[i].inited = 1;
+      return i;
+    }
+  }
+
+  i = InitedListNum;
+  if (i < INITED_LIST_SIZE - 1) {
+    InitedList[i].enc    = enc;
+    InitedList[i].inited = 1;
+    InitedListNum++;
+    return i;
+  }
+
+  return -1;
+}
+
+static int
+enc_is_inited(OnigEncoding enc)
+{
+  int i;
+
+  for (i = 0; i < InitedListNum; i++) {
+    if (InitedList[i].enc == enc) {
+      return InitedList[i].inited;
+    }
+  }
+
+  return 0;
+}
+
+extern int
+onigenc_end(void)
+{
+  int i;
+
+  for (i = 0; i < InitedListNum; i++) {
+    InitedList[i].enc    = 0;
+    InitedList[i].inited = 0;
+  }
+
+  InitedListNum = 0;
+  return ONIG_NORMAL;
+}
+
 extern int
 onigenc_init(void)
 {
@@ -42,16 +102,21 @@ onig_initialize_encoding(OnigEncoding enc)
 {
   int r;
 
-  if (ONIGENC_IS_ASCII_COMPATIBLE_ENCODING(enc)) {
+  if (enc != ONIG_ENCODING_ASCII &&
+      ONIGENC_IS_ASCII_COMPATIBLE_ENCODING(enc)) {
     if (ONIG_ENCODING_ASCII->init != 0 &&
-        ONIG_ENCODING_ASCII->is_initialized() == 0) {
+        enc_is_inited(ONIG_ENCODING_ASCII) == 0) {
       r = ONIG_ENCODING_ASCII->init();
       if (r != ONIG_NORMAL) return r;
+      enc_inited_entry(ONIG_ENCODING_ASCII);
     }
   }
 
-  if (enc->init != 0 && (enc->is_initialized() == 0)) {
+  if (enc->init != 0 &&
+      enc_is_inited(enc) == 0) {
     r = (enc->init)();
+    if (r == ONIG_NORMAL)
+      enc_inited_entry(enc);
     return r;
   }
 
diff --git a/src/regenc.h b/src/regenc.h
index 7978093..4dd89ba 100644
--- a/src/regenc.h
+++ b/src/regenc.h
@@ -121,6 +121,7 @@ struct PropertyNameCtype {
 
 
 /* for encoding system implementation (internal) */
+extern int onigenc_end(void);
 extern int onigenc_ascii_apply_all_case_fold P_((OnigCaseFoldType flag, OnigApplyAllCaseFoldFunc f, void* arg));
 extern int onigenc_ascii_get_case_fold_codes_by_str P_((OnigCaseFoldType flag, const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[]));
 extern int onigenc_apply_all_case_fold_with_map P_((int map_size, const OnigPairCaseFoldCodes map[], int ess_tsett_flag, OnigCaseFoldType flag, OnigApplyAllCaseFoldFunc f, void* arg));
-- 
2.40.0