Allow overwrite (i.e. continue) when writing JPEG2000 MXFs.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/KM_fileio.cpp b/src/KM_fileio.cpp
index b637fa0..26996f9 100644
--- a/src/KM_fileio.cpp
+++ b/src/KM_fileio.cpp
@@ -926,6 +926,44 @@ Kumu::FileWriter::OpenWrite(const std::string& filename)
   return Kumu::RESULT_OK;
 }
 
+/** @param filename File name (UTF-8 encoded) */
+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);
+
+  int const wn = MultiByteToWideChar (CP_UTF8, 0, filename, -1, 0, 0);
+  wchar_t* buffer = new wchar_t[wn];
+  if (MultiByteToWideChar (CP_UTF8, 0, filename, -1, buffer, wn) == 0) {
+    delete[] buffer;
+    return Kumu::RESULT_FAIL;
+  }
+
+  m_Handle = ::CreateFileW(buffer,
+			  (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
+			  );
+
+  delete[] buffer;
+
+  ::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)