Try to implement FileWriter::OpenModify on Windows.

[libdcp.git] / asdcplib / src / KM_fileio.cpp

diff --git a/asdcplib/src/KM_fileio.cpp b/asdcplib/src/KM_fileio.cpp
index 138bc3b4cfc1d8b813a26909787f37b01157ce81..d48e7554900908d340902e35754ac73b2b80a824 100644 (file)
--- a/asdcplib/src/KM_fileio.cpp
+++ b/asdcplib/src/KM_fileio.cpp
@@ -831,6 +831,34 @@ Kumu::FileWriter::OpenWrite(const char* filename)
   return Kumu::RESULT_OK;
 }
 
+//
+Kumu::Result_t
+Kumu::FileWriter::OpenModify(const char* filename)
+{
+  KM_TEST_NULL_STR_L(filename);
+  m_Filename = filename;
+  
+  // suppress popup window on error
+  UINT prev = ::SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOOPENFILEERRORBOX);
+
+  m_Handle = ::CreateFileA(filename,
+                         (GENERIC_WRITE|GENERIC_READ),  // open for reading
+                         FILE_SHARE_READ,               // share for reading
+                         NULL,                          // no security
+                         OPEN_ALWAYS,                   // don't truncate existing
+                         FILE_ATTRIBUTE_NORMAL,         // normal file
+                         NULL                           // no template file
+                         );
+
+  ::SetErrorMode(prev);
+
+  if ( m_Handle == INVALID_HANDLE_VALUE )
+    return Kumu::RESULT_FILEOPEN;
+  
+  m_IOVec = new h__iovec;
+  return Kumu::RESULT_OK;
+}
+
 //
 Kumu::Result_t
 Kumu::FileWriter::Writev(ui32_t* bytes_written)