Static analyzer (PVS Studio) fixes (#1372)

* [init] Initialize stream mode to in by default

* [leak] Fix memory leak of server api ptr

Should call delete on pointer instead of releasing it to the caller.

* [macro] Ensure priority of macro computation

Enclose macro args in round brackets to ensure operators priority.

* [prep] Fix comment after preprocessor macro

* [ub] Use typed pointer in delete operation

* Delete of void pointer is UB.  See section 5.3.5/3.  SO question:
https://stackoverflow.com/questions/941832/is-it-safe-to-delete-a-void-pointer
* Windows APIs used here return FALSE in case of failure, and
non-FALSE on success.  There is no info in spec that only TRUE
value indicates success.  Correct way to implement check for
success call is to compare with false like result != FALSE.

* [fmt] Fix military RFC1123 time format parsing

Ensure + or - sign is used for time zone offset in RFC1123 military
time format.

* Remove redundant != FALSE.

Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>

Release/include/cpprest/producerconsumerstream.h

@@ -47,6 +47,7 @@ public:
     /// </summary>
     basic_producer_consumer_buffer(size_t alloc_size)
         : streambuf_state_manager<_CharType>(std::ios_base::out | std::ios_base::in)
+        , m_mode(std::ios_base::in)
         , m_alloc_size(alloc_size)
         , m_allocBlock(nullptr)
         , m_total(0)

Release/src/http/listener/http_server_api.cpp

@@ -50,7 +50,7 @@ void http_server_api::unregister_server_api()
         throw http_exception(_XPLATSTR("Server API was cleared while listeners were still attached"));
     }
 
-    s_server_api.release();
+    s_server_api.reset();
 }
 
 void http_server_api::unsafe_register_server_api(std::unique_ptr<http_server> server_api)

Release/src/http/listener/http_server_httpsys.cpp

@@ -32,7 +32,7 @@ using namespace http::details;
 using namespace http::experimental::listener;
 using namespace http::experimental::details;
 
-#define CHUNK_SIZE 64 * 1024
+#define CHUNK_SIZE (64 * 1024)
 
 namespace web
 {

Release/src/pch/stdafx.h

@@ -40,7 +40,7 @@
 // Windows Header Files:
 #ifndef __cplusplus_winrt
 #include <winhttp.h>
-#endif !__cplusplus_winrt
+#endif // !__cplusplus_winrt
 
 #else // LINUX or APPLE
 #define __STDC_LIMIT_MACROS

Release/src/streams/fileio_win32.cpp

@@ -111,7 +111,7 @@ void CALLBACK IoCompletionCallback(PTP_CALLBACK_INSTANCE instance,
 
     EXTENDED_OVERLAPPED* pExtOverlapped = static_cast<EXTENDED_OVERLAPPED*>(pOverlapped);
     pExtOverlapped->func(result, static_cast<DWORD>(numberOfBytesTransferred), static_cast<LPOVERLAPPED>(pOverlapped));
-    delete pOverlapped;
+    delete pExtOverlapped;
 }
 #endif
 
@@ -399,10 +399,10 @@ size_t _write_file_async(_In_ streams::details::_file_info_impl* fInfo,
 
     size_t result = static_cast<size_t>(-1);
 
-    if (wrResult == TRUE)
+    if (wrResult)
     {
         // If WriteFile returned true, it must be because the operation completed immediately.
-        // However, we didn't pass in an  address for the number of bytes written, so
+        // However, we didn't pass in an address for the number of bytes written, so
         // we have to retrieve it using 'GetOverlappedResult,' which may, in turn, fail.
         DWORD written = 0;
         result = GetOverlappedResult(fInfo->m_handle, pOverlapped.get(), &written, FALSE) ? static_cast<size_t>(written)
@@ -496,7 +496,7 @@ size_t _read_file_async(_In_ streams::details::_file_info_impl* fInfo,
 
     size_t result = static_cast<size_t>(-1);
 
-    if (wrResult == TRUE)
+    if (wrResult)
     {
         // If ReadFile returned true, it must be because the operation completed immediately.
         // However, we didn't pass in an address for the number of bytes written, so
@@ -941,7 +941,7 @@ utility::size64_t __cdecl _get_size(_In_ concurrency::streams::details::_file_in
 
     LARGE_INTEGER size;
 
-    if (GetFileSizeEx(fInfo->m_handle, &size) == TRUE)
+    if (GetFileSizeEx(fInfo->m_handle, &size))
         return utility::size64_t(size.QuadPart / char_size);
     else
         return 0;

Release/src/utilities/asyncrt_utils.cpp

@@ -1148,7 +1148,7 @@ datetime __cdecl datetime::from_string(const utility::string_t& dateString, date
             {
                 tzHours = 8;
             }
-            else if ((tzCh == _XPLATSTR('+') || tzCh == _XPLATSTR('-')) && ascii_isdigit2(str[1]) &&
+            else if ((str[0] == _XPLATSTR('+') || str[0] == _XPLATSTR('-')) && ascii_isdigit2(str[1]) &&
                      ascii_isdigit(str[2]) && ascii_isdigit5(str[3]) && ascii_isdigit(str[4]))
             {
                 tzCh = str[0];

Release/tests/functional/utils/datetime.cpp

@@ -304,7 +304,8 @@ SUITE(datetime)
             _XPLATSTR("01 Jan 1971 00:00:61 GMT"),
             _XPLATSTR("01 Jan 1899 00:00:00 GMT"), // underflow
             _XPLATSTR("01 Jan 1969 00:00:00 CEST"), // bad tz
-            _XPLATSTR("01 Jan 1970 00:00:00 +2400"), // bad tzoffsets
+            _XPLATSTR("14 Jan 2019 23:16:21 G0100"), // bad tzoffsets
+            _XPLATSTR("01 Jan 1970 00:00:00 +2400"),
             _XPLATSTR("01 Jan 1970 00:00:00 -3000"),
             _XPLATSTR("01 Jan 1970 00:00:00 +2160"),
             _XPLATSTR("01 Jan 1970 00:00:00 -2400"),