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
  10 #include "Terminal.h"
  11
  12 /**
  13   Translate all raw data in the Raw FIFO into unicode, and insert
  14   them into Unicode FIFO.
  15
  16   @param TerminalDevice          The terminal device.
  17
  18 **/
  19 VOID
  20 AnsiRawDataToUnicode (
  21   IN  TERMINAL_DEV    *TerminalDevice
  22   )
  23 {
  24   UINT8 RawData;
  25
  26   //
  27   // pop the raw data out from the raw fifo,
  28   // and translate it into unicode, then push
  29   // the unicode into unicode fifo, until the raw fifo is empty.
  30   //
  31   while (!IsRawFiFoEmpty (TerminalDevice) && !IsUnicodeFiFoFull (TerminalDevice)) {
  32
  33     RawFiFoRemoveOneKey (TerminalDevice, &RawData);
  34
  35     UnicodeFiFoInsertOneKey (TerminalDevice, (UINT16) RawData);
  36   }
  37 }
  38
  39 /**
  40   Check if input string is valid Ascii string, valid EFI control characters
  41   or valid text graphics.
  42
  43   @param  TerminalDevice          The terminal device.
  44   @param  WString                 The input string.
  45
  46   @retval EFI_UNSUPPORTED         If not all input characters are valid.
  47   @retval EFI_SUCCESS             If all input characters are valid.
  48
  49 **/
  50 EFI_STATUS
  51 AnsiTestString (
  52   IN  TERMINAL_DEV    *TerminalDevice,
  53   IN  CHAR16          *WString
  54   )
  55 {
  56   CHAR8 GraphicChar;
  57
  58   //
  59   // support three kind of character:
  60   // valid ascii, valid efi control char, valid text graphics.
  61   //
  62   for (; *WString != CHAR_NULL; WString++) {
  63
  64     if ( !(TerminalIsValidAscii (*WString) ||
  65         TerminalIsValidEfiCntlChar (*WString) ||
  66         TerminalIsValidTextGraphics (*WString, &GraphicChar, NULL) )) {
  67
  68       return EFI_UNSUPPORTED;
  69     }
  70   }
  71
  72   return EFI_SUCCESS;
  73 }