Function MemLogVA

Library/MemLogLibDefault/MemLogLib.c:230–308

Prints a log message to memory buffer. @param Timing TRUE to prepend timing to log. @param DebugMode DebugMode will be passed to Callback function if it is set. @param Format The format string for the debug message to print. @param Marker VA_LIST with variable arguments for Format. **/

 
**/
VOID
EFIAPI
MemLogVA (
  IN  CONST BOOLEAN Timing,
  IN  CONST INTN    DebugMode,
  IN  CONST CHAR8   *Format,
  IN  VA_LIST       Marker
  )
{
  EFI_STATUS      Status;
  UINTN           DataWritten;
  CHAR8           *LastMessage;
  
  if (Format == NULL) {
    return;
  }
  
  if (mMemLog == NULL) {
    Status = MemLogInit ();
    if (EFI_ERROR(Status)) {
      return;
    }
  }
  
  //
  // Check if buffer can accept MEM_LOG_MAX_LINE_SIZE chars.
  // Increase buffer if not.
  //
  if ((UINTN)(mMemLog->Cursor - mMemLog->Buffer) + MEM_LOG_MAX_LINE_SIZE > mMemLog->BufferSize) {
      UINTN Offset;
      // not enough place for max line - make buffer bigger
      // but not too big (if something gets out of controll)
      if (mMemLog->BufferSize + MEM_LOG_INITIAL_SIZE > MEM_LOG_MAX_SIZE) {
      // Out of resources!
        return;
      }
      Offset = mMemLog->Cursor - mMemLog->Buffer;
      mMemLog->Buffer = ReallocatePool(mMemLog->BufferSize, mMemLog->BufferSize + MEM_LOG_INITIAL_SIZE, mMemLog->Buffer);
      mMemLog->BufferSize += MEM_LOG_INITIAL_SIZE;
      mMemLog->Cursor = mMemLog->Buffer + Offset;
    }
  
  //
  // Add log to buffer
  //
  LastMessage = mMemLog->Cursor;
  if (Timing) {
    //
    // Write timing only at the beginning of a new line
    //
    if ((mMemLog->Buffer[0] == '\0') || (mMemLog->Cursor[-1] == '\n')) {
      DataWritten = AsciiSPrint(
                                mMemLog->Cursor,
                                mMemLog->BufferSize - (mMemLog->Cursor - mMemLog->Buffer),
                                "%a  ",
                                GetTiming ());
      mMemLog->Cursor += DataWritten;
    }