closes bpo-37437: Update vendorized expat to 2.2.7. (GH-14436)

(cherry picked from commit 3b03b09fc94425915c5b1225e9200a3a95bc827b)

Co-authored-by: Benjamin Peterson <benjamin@python.org>

7 files changed, 22 insertions, 32 deletions

diff --git a/Misc/NEWS.d/next/Library/2019-06-27-20-33-50.bpo-37437.du39_A.rst b/Misc/NEWS.d/next/Library/2019-06-27-20-33-50.bpo-37437.du39_A.rst
new file mode 100644
index 0000000000..80719ee152
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-06-27-20-33-50.bpo-37437.du39_A.rst
@@ -0,0 +1 @@
+Update vendorized expat version to 2.2.7.
diff --git a/Modules/expat/expat.h b/Modules/expat/expat.h
index 174c3fafda..c050f1d918 100644
--- a/Modules/expat/expat.h
+++ b/Modules/expat/expat.h
@@ -1076,7 +1076,7 @@ XML_GetFeatureList(void);
 */
 #define XML_MAJOR_VERSION 2
 #define XML_MINOR_VERSION 2
-#define XML_MICRO_VERSION 6
+#define XML_MICRO_VERSION 7
 
 #ifdef __cplusplus
 }
diff --git a/Modules/expat/expat_external.h b/Modules/expat/expat_external.h
index 2d96b4f41a..875225d77e 100644
--- a/Modules/expat/expat_external.h
+++ b/Modules/expat/expat_external.h
@@ -35,10 +35,6 @@
 
 /* External API definitions */
 
-/* Namespace external symbols to allow multiple libexpat version to
-   co-exist. */
-#include "pyexpatns.h"
-
 #if defined(_MSC_EXTENSIONS) && !defined(__BEOS__) && !defined(__CYGWIN__)
 # define XML_USE_MSC_EXTENSIONS 1
 #endif
@@ -97,7 +93,11 @@
 # endif
 #endif  /* not defined XML_STATIC */
 
-#if !defined(XMLIMPORT) && defined(__GNUC__) && (__GNUC__ >= 4)
+#ifndef XML_ENABLE_VISIBILITY
+# define XML_ENABLE_VISIBILITY 0
+#endif
+
+#if !defined(XMLIMPORT) && XML_ENABLE_VISIBILITY
 # define XMLIMPORT __attribute__ ((visibility ("default")))
 #endif
 
diff --git a/Modules/expat/internal.h b/Modules/expat/internal.h
index e33fdcb023..dc4ef0c7e2 100644
--- a/Modules/expat/internal.h
+++ b/Modules/expat/internal.h
@@ -115,6 +115,11 @@ extern "C" {
 #endif
 
 
+#ifdef XML_ENABLE_VISIBILITY
+#if XML_ENABLE_VISIBILITY
+__attribute__ ((visibility ("default")))
+#endif
+#endif
 void
 _INTERNAL_trim_to_complete_utf8_characters(const char * from, const char ** fromLimRef);
 
diff --git a/Modules/expat/winconfig.h b/Modules/expat/winconfig.h
index 17fea46890..28a043c604 100644
--- a/Modules/expat/winconfig.h
+++ b/Modules/expat/winconfig.h
@@ -53,10 +53,6 @@
 /* we will assume all Windows platforms are little endian */
 #define BYTEORDER 1234
 
-/* Windows has memmove() available. */
-#define HAVE_MEMMOVE
-
-
 #endif /* !defined(HAVE_EXPAT_CONFIG_H) */
 
 
diff --git a/Modules/expat/xmlparse.c b/Modules/expat/xmlparse.c
index c4f3ffc215..9c0987f4f6 100644
--- a/Modules/expat/xmlparse.c
+++ b/Modules/expat/xmlparse.c
@@ -1,4 +1,4 @@
-/* 19ac4776051591216f1874e34ee99b6a43a3784c8bd7d70efeb9258dd22b906a (2.2.6+)
+/* 69df5be70289a11fb834869ce4a91c23c1d9dd04baffcbd10e86742d149a080c (2.2.7+)
                             __  __            _
                          ___\ \/ /_ __   __ _| |_
                         / _ \\  /| '_ \ / _` | __|
@@ -164,15 +164,6 @@ typedef char ICHAR;
 /* Do safe (NULL-aware) pointer arithmetic */
 #define EXPAT_SAFE_PTR_DIFF(p, q) (((p) && (q)) ? ((p) - (q)) : 0)
 
-/* Handle the case where memmove() doesn't exist. */
-#ifndef HAVE_MEMMOVE
-#ifdef HAVE_BCOPY
-#define memmove(d,s,l) bcopy((s),(d),(l))
-#else
-#error memmove does not exist on this platform, nor is a substitute available
-#endif /* HAVE_BCOPY */
-#endif /* HAVE_MEMMOVE */
-
 #include "internal.h"
 #include "xmltok.h"
 #include "xmlrole.h"
@@ -747,7 +738,7 @@ writeRandomBytes_dev_urandom(void * target, size_t count) {
 #endif  /* ! defined(HAVE_ARC4RANDOM_BUF) && ! defined(HAVE_ARC4RANDOM) */
 
 
-#if defined(HAVE_ARC4RANDOM)
+#if defined(HAVE_ARC4RANDOM) && ! defined(HAVE_ARC4RANDOM_BUF)
 
 static void
 writeRandomBytes_arc4random(void * target, size_t count) {
@@ -765,7 +756,7 @@ writeRandomBytes_arc4random(void * target, size_t count) {
   }
 }
 
-#endif  /* defined(HAVE_ARC4RANDOM) */
+#endif  /* defined(HAVE_ARC4RANDOM) && ! defined(HAVE_ARC4RANDOM_BUF) */
 
 
 #ifdef _WIN32
@@ -3019,7 +3010,7 @@ doContent(XML_Parser parser,
         enum XML_Error result;
         if (parser->m_startCdataSectionHandler)
           parser->m_startCdataSectionHandler(parser->m_handlerArg);
-#if 0
+/* BEGIN disabled code */
         /* Suppose you doing a transformation on a document that involves
            changing only the character data.  You set up a defaultHandler
            and a characterDataHandler.  The defaultHandler simply copies
@@ -3032,9 +3023,9 @@ doContent(XML_Parser parser,
            However, now we have a start/endCdataSectionHandler, so it seems
            easier to let the user deal with this.
         */
-        else if (parser->m_characterDataHandler)
+        else if (0 && parser->m_characterDataHandler)
           parser->m_characterDataHandler(parser->m_handlerArg, parser->m_dataBuf, 0);
-#endif
+/* END disabled code */
         else if (parser->m_defaultHandler)
           reportDefault(parser, enc, s, next);
         result = doCdataSection(parser, enc, &next, end, nextPtr, haveMore);
@@ -3731,11 +3722,11 @@ doCdataSection(XML_Parser parser,
     case XML_TOK_CDATA_SECT_CLOSE:
       if (parser->m_endCdataSectionHandler)
         parser->m_endCdataSectionHandler(parser->m_handlerArg);
-#if 0
+/* BEGIN disabled code */
       /* see comment under XML_TOK_CDATA_SECT_OPEN */
-      else if (parser->m_characterDataHandler)
+      else if (0 && parser->m_characterDataHandler)
         parser->m_characterDataHandler(parser->m_handlerArg, parser->m_dataBuf, 0);
-#endif
+/* END disabled code */
       else if (parser->m_defaultHandler)
         reportDefault(parser, enc, s, next);
       *startPtr = next;
@@ -6080,7 +6071,7 @@ setElementTypePrefix(XML_Parser parser, ELEMENT_TYPE *elementType)
       else
         poolDiscard(&dtd->pool);
       elementType->prefix = prefix;
-
+      break;
     }
   }
   return 1;
diff --git a/Modules/expat/xmltok.c b/Modules/expat/xmltok.c
index 6371a350da..6b415d8397 100644
--- a/Modules/expat/xmltok.c
+++ b/Modules/expat/xmltok.c
@@ -30,9 +30,6 @@
    USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-#if !defined(_WIN32) && defined(HAVE_EXPAT_CONFIG_H)
-#  include <pyconfig.h>
-#endif
 #include <stddef.h>
 #include <string.h>  /* memcpy */