Implement pcre_stack_guard.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1454 2f5784b3-3f2a-0410-8824-cb99058d5e15

1 files changed, 12 insertions, 0 deletions

diff --git a/pcre_compile.c b/pcre_compile.c
index 99017c4..e220799 100644
--- a/pcre_compile.c
+++ b/pcre_compile.c
@@ -547,6 +547,8 @@ static const char error_texts[] =
   "parentheses are too deeply nested\0"
   "invalid range in character class\0"
   "group name must start with a non-digit\0"
+  /* 85 */
+  "parentheses are too deeply nested (stack check)\0"  
   ;
 
 /* Table to identify digits and hex digits. This is used when compiling
@@ -8033,6 +8035,16 @@ unsigned int orig_bracount;
 unsigned int max_bracount;
 branch_chain bc;
 
+/* If set, call the external function that checks for stack availability. */
+
+if (PUBL(stack_guard) != NULL && PUBL(stack_guard)())
+  {
+  *errorcodeptr= ERR85;
+  return FALSE;
+  }
+  
+/* Miscellaneous initialization */ 
+
 bc.outer = bcptr;
 bc.current_branch = code;