Upgraded PCRE to 8.10, fixed possible memory leak in PCRE

Author: nickgammon

pcre/config.h

@@ -52,7 +52,7 @@ them both to 0; an emulation function will be used. */
 #define HAVE_DLFCN_H 1
 
 /* Define to 1 if you have the <inttypes.h> header file. */
-#define HAVE_INTTYPES_H 1
+#define HAVE_INTTYPES_H 0
 
 /* Define to 1 if you have the <limits.h> header file. */
 #define HAVE_LIMITS_H 1

pcre/readme.txt

@@ -1,10 +1,8 @@
 PCRE built as follows:
 
-1. Download: http://sourceforge.net/projects/pcre/files/pcre/8.01/pcre-8.01.tar.bz2/download
+1. Download: http://sourceforge.net/projects/pcre/files/pcre/8.10/pcre-8.10.zip/download
 
-2. Unzip and untar the file (eg.):
-
-tar xjf pcre-8.01.tar.bz2
+2. Unzip the file pcre-8.10.zip
 
 
 3. Copy the following files to the mushclient source "pcre" directory:

regexp.cpp

@@ -29,14 +29,14 @@ pcre_extra * extra;
   extra =  pcre_study(program, 0, &error);        
 
   if (error)
+    {
+    pcre_free (program);
     ThrowErrorException("Regexp study failed: %s", error);
+    }
 
   // we need to allocate memory for the substring offsets
   re = new t_regexp;
 
-  if (!re)
-    ThrowErrorException("Could not allocate memory for regular expression");
-
   // remember program and extra stuff
   re->m_program = program;
   re->m_extra = extra;
@@ -81,7 +81,7 @@ LARGE_INTEGER start,
   // free program as an indicator that we can't keep trying to do this one
   if (count <= 0)
     {
-    free (prog->m_program);
+    pcre_free (prog->m_program);
     prog->m_program = NULL;
     prog->m_iExecutionError = count; // remember reason
     }
@@ -118,7 +118,7 @@ pcre * program;
 
   if (program)
     {
-    free (program);
+    pcre_free (program);
     return true;     // good
     }
 

regexp.h

@@ -39,14 +39,11 @@ class t_regexp
                 };   // constructor
   ~t_regexp () { 
     if (m_program) 
-      free (m_program); 
+      pcre_free (m_program); 
     if (m_extra) 
-      free (m_extra); 
+      pcre_free (m_extra); 
     };  // destructor
 
-//  const char *startp [MAX_WILDCARDS];
-//  const char *endp [MAX_WILDCARDS];
-
   // pairs of offsets from match
   vector<int> m_vOffsets;
   // count of matches
@@ -86,7 +83,6 @@ class t_regexp
         iNumber = PCRE_ERROR_NOSUBSTRING;
       else
         iNumber = njg_get_first_set (m_program, sName.c_str (), &m_vOffsets [0]);
- //       iNumber = pcre_get_stringnumber (m_program, sName.c_str ());
       }
     return GetWildcard (iNumber);
     }