From 2318bef1de1ba3cd9e0b6a88fed9bd39be6a3ea9 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 16 Aug 2009 01:45:18 +0000
Subject: * regparse.c (parse_char_class, parse_exp, parse_branch),  
 (parse_subexp): fixed memory leak.  a patch from Ralf Junker   <ralfjunker AT
 gmx.de> at [ruby-core:24921].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24550 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 regparse.c | 60 +++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 35 insertions(+), 25 deletions(-)

(limited to 'regparse.c')

diff --git a/regparse.c b/regparse.c
index 90b26a3bca..93b3beb452 100644
--- a/regparse.c
+++ b/regparse.c
@@ -1,3 +1,4 @@
+/* -*- mode:c; c-file-style:"gnu" -*- */
 /**********************************************************************
   regparse.c -  Oniguruma (regular expression library)
 **********************************************************************/
@@ -4454,12 +4455,11 @@ parse_char_class(Node** np, OnigToken* tok, UChar** src, UChar* end,
 	CClassNode* acc;
 
 	r = parse_char_class(&anode, tok, &p, end, env);
-	if (r != 0) goto cc_open_err;
-	acc = NCCLASS(anode);
-	r = or_cclass(cc, acc, env);
-
+	if (r == 0) {
+	  acc = NCCLASS(anode);
+	  r = or_cclass(cc, acc, env);
+	}
 	onig_node_free(anode);
-      cc_open_err:
 	if (r != 0) goto err;
       }
       break;
@@ -5105,9 +5105,8 @@ parse_exp(Node** np, OnigToken* tok, int term,
   case TK_ALT:
   case TK_EOT:
   end_of_token:
-  *np = node_new_empty();
-  return tok->type;
-  break;
+    *np = node_new_empty();
+    return tok->type;
 
   case TK_SUBEXP_OPEN:
     r = parse_enclose(np, tok, TK_SUBEXP_CLOSE, src, end, env);
@@ -5119,10 +5118,10 @@ parse_exp(Node** np, OnigToken* tok, int term,
 
       env->option = NENCLOSE(*np)->option;
       r = fetch_token(tok, src, end, env);
-      if (r < 0) return r;
+      if (r < 0) goto err;
       r = parse_subexp(&target, tok, term, src, end, env);
       env->option = prev;
-      if (r < 0) return r;
+      if (r < 0) goto err;
       NENCLOSE(*np)->target = target;
       return tok->type;
     }
@@ -5144,11 +5143,11 @@ parse_exp(Node** np, OnigToken* tok, int term,
 
       while (1) {
 	r = fetch_token(tok, src, end, env);
-	if (r < 0) return r;
+	if (r < 0) goto err;
 	if (r != TK_STRING) break;
 
 	r = onig_node_str_cat(*np, tok->backp, *src);
-	if (r < 0) return r;
+	if (r < 0) goto err;
       }
 
     string_end:
@@ -5173,7 +5172,7 @@ parse_exp(Node** np, OnigToken* tok, int term,
 	}
 
 	r = fetch_token(tok, src, end, env);
-	if (r < 0) return r;
+	if (r < 0) goto err;
 	if (r != TK_RAW_BYTE) {
 	  /* Don't use this, it is wrong for little endian encodings. */
 #ifdef USE_PAD_TO_SHORT_BYTE_CHAR
@@ -5191,7 +5190,7 @@ parse_exp(Node** np, OnigToken* tok, int term,
 	}
 
 	r = node_str_cat_char(*np, (UChar )tok->u.c);
-	if (r < 0) return r;
+	if (r < 0) goto err;
 
 	len++;
       }
@@ -5352,7 +5351,7 @@ parse_exp(Node** np, OnigToken* tok, int term,
 					i_apply_case_fold, &iarg);
 	if (r != 0) {
 	  onig_node_free(iarg.alt_root);
-	  return r;
+	  goto err;
 	}
 	if (IS_NOT_NULL(iarg.alt_root)) {
           Node* work = onig_node_new_alt(*np, iarg.alt_root);
@@ -5437,7 +5436,7 @@ parse_exp(Node** np, OnigToken* tok, int term,
 
   re_entry:
     r = fetch_token(tok, src, end, env);
-    if (r < 0) return r;
+    if (r < 0) goto err;
 
   repeat:
     if (r == TK_OP_REPEAT || r == TK_INTERVAL) {
@@ -5449,7 +5448,7 @@ parse_exp(Node** np, OnigToken* tok, int term,
       CHECK_NULL_RETURN_MEMERR(qn);
       NQTFR(qn)->greedy = tok->u.repeat.greedy;
       r = set_quantifier(qn, *targetp, group, env);
-      if (r < 0) return r;
+      if (r < 0) goto err;
 
       if (tok->u.repeat.possessive != 0) {
 	Node* en;
@@ -5479,6 +5478,9 @@ parse_exp(Node** np, OnigToken* tok, int term,
       }
       goto re_entry;
     }
+
+  err:
+    onig_node_free(*np);
   }
 
   return r;
@@ -5503,7 +5505,10 @@ parse_branch(Node** top, OnigToken* tok, int term,
     headp = &(NCDR(*top));
     while (r != TK_EOT && r != term && r != TK_ALT) {
       r = parse_exp(&node, tok, term, src, end, env);
-      if (r < 0) return r;
+      if (r < 0) {
+	onig_node_free(*top);
+	return r;
+      }
 
       if (NTYPE(node) == NT_LIST) {
 	*headp = node;
@@ -5530,10 +5535,7 @@ parse_subexp(Node** top, OnigToken* tok, int term,
 
   *top = NULL;
   r = parse_branch(&node, tok, term, src, end, env);
-  if (r < 0) {
-    onig_node_free(node);
-    return r;
-  }
+  if (r < 0) return r;
 
   if (r == term) {
     *top = node;
@@ -5543,16 +5545,24 @@ parse_subexp(Node** top, OnigToken* tok, int term,
     headp = &(NCDR(*top));
     while (r == TK_ALT) {
       r = fetch_token(tok, src, end, env);
-      if (r < 0) return r;
+      if (r < 0) {
+	onig_node_free(*top);
+	return r;
+      }
       r = parse_branch(&node, tok, term, src, end, env);
-      if (r < 0) return r;
+      if (r < 0) {
+	onig_node_free(*top);
+	return r;
+      }
 
       *headp = onig_node_new_alt(node, NULL);
       headp = &(NCDR(*headp));
     }
 
-    if (tok->type != (enum TokenSyms )term)
+    if (tok->type != (enum TokenSyms )term) {
+      onig_node_free(*top);
       goto err;
+    }
   }
   else {
   err:
-- 
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