X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/765624f7350bf32b1c78a10ab1a1e10729c52cd1..e6adf05834e880312efa3d59914ecc1d4f5f78a6:/src/common/regex.cpp?ds=sidebyside

diff --git a/src/common/regex.cpp b/src/common/regex.cpp
index 46eb372cfb..45efe1a5b2 100644
--- a/src/common/regex.cpp
+++ b/src/common/regex.cpp
@@ -38,6 +38,11 @@
     #include "wx/intl.h"
 #endif //WX_PRECOMP
 
+// FreeBSD requires this, it probably doesn't hurt for others
+#ifdef __UNIX__
+    #include <sys/types.h>
+#endif
+
 #include <regex.h>
 
 #include "wx/regex.h"
@@ -102,6 +107,7 @@ wxRegExImpl::wxRegExImpl()
 {
     m_isCompiled = FALSE;
     m_Matches = NULL;
+    m_nMatches = 0;
 }
 
 wxRegExImpl::~wxRegExImpl()
@@ -171,8 +177,29 @@ bool wxRegExImpl::Compile(const wxString& expr, int flags)
         }
         else
         {
-            // will alloc later
-            m_nMatches = WX_REGEX_MAXMATCHES;
+            // we will alloc the array later (only if really needed) but count
+            // the number of sub-expressions in the regex right now
+
+            // there is always one for the whole expression
+            m_nMatches = 1;
+
+            // and some more for bracketed subexperessions
+            const wxChar *cptr = expr.c_str();
+            wxChar prev = _T('\0');
+            while ( *cptr != _T('\0') )
+            {
+                // is this a subexpr start, i.e. "(" for extended regex or
+                // "\(" for a basic one?
+                if ( *cptr == _T('(') &&
+                     (flags & wxRE_BASIC ? prev == _T('\\')
+                                         : prev != _T('\\')) )
+                {
+                    m_nMatches++;
+                }
+
+                prev = *cptr;
+                cptr++;
+            }
         }
 
         m_isCompiled = TRUE;
@@ -230,8 +257,6 @@ bool wxRegExImpl::GetMatch(size_t *start, size_t *len, size_t index) const
     wxCHECK_MSG( index < m_nMatches, FALSE, _T("invalid match index") );
 
     const regmatch_t& match = m_Matches[index];
-    if ( match.rm_so == -1 )
-        return FALSE;
 
     if ( start )
         *start = match.rm_so;