MdeModulePkg/Universal/Console/TerminalDxe/Ansi.c

   1 /** @file
   2   Implementation of translation upon PC ANSI.
   3
   4 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "Terminal.h"
  10
  11 /**
  12   Translate all raw data in the Raw FIFO into unicode, and insert
  13   them into Unicode FIFO.
  14
  15   @param TerminalDevice          The terminal device.
  16
  17 **/
  18 VOID
  19 AnsiRawDataToUnicode (
  20   IN  TERMINAL_DEV  *TerminalDevice
  21   )
  22 {
  23   UINT8  RawData;
  24
  25   //
  26   // pop the raw data out from the raw fifo,
  27   // and translate it into unicode, then push
  28   // the unicode into unicode fifo, until the raw fifo is empty.
  29   //
  30   while (!IsRawFiFoEmpty (TerminalDevice) && !IsUnicodeFiFoFull (TerminalDevice)) {
  31     RawFiFoRemoveOneKey (TerminalDevice, &RawData);
  32
  33     UnicodeFiFoInsertOneKey (TerminalDevice, (UINT16)RawData);
  34   }
  35 }
  36
  37 /**
  38   Check if input string is valid Ascii string, valid EFI control characters
  39   or valid text graphics.
  40
  41   @param  TerminalDevice          The terminal device.
  42   @param  WString                 The input string.
  43
  44   @retval EFI_UNSUPPORTED         If not all input characters are valid.
  45   @retval EFI_SUCCESS             If all input characters are valid.
  46
  47 **/
  48 EFI_STATUS
  49 AnsiTestString (
  50   IN  TERMINAL_DEV  *TerminalDevice,
  51   IN  CHAR16        *WString
  52   )
  53 {
  54   CHAR8  GraphicChar;
  55
  56   //
  57   // support three kind of character:
  58   // valid ascii, valid efi control char, valid text graphics.
  59   //
  60   for ( ; *WString != CHAR_NULL; WString++) {
  61     if ( !(TerminalIsValidAscii (*WString) ||
  62            TerminalIsValidEfiCntlChar (*WString) ||
  63            TerminalIsValidTextGraphics (*WString, &GraphicChar, NULL)))
  64     {
  65       return EFI_UNSUPPORTED;
  66     }
  67   }
  68
  69   return EFI_SUCCESS;
  70 }