MdeModulePkg/Universal/Console/TerminalDxe/Ansi.c

   1 /** @file
   2   Implementation of translation upon PC ANSI.
   3
   4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16 #include "Terminal.h"
  17
  18 /**
  19   Translate all raw data in the Raw FIFO into unicode, and insert
  20   them into Unicode FIFO.
  21
  22   @param TerminalDevice          The terminal device.
  23
  24 **/
  25 VOID
  26 AnsiRawDataToUnicode (
  27   IN  TERMINAL_DEV    *TerminalDevice
  28   )
  29 {
  30   UINT8 RawData;
  31
  32   //
  33   // pop the raw data out from the raw fifo,
  34   // and translate it into unicode, then push
  35   // the unicode into unicode fifo, until the raw fifo is empty.
  36   //
  37   while (!IsRawFiFoEmpty (TerminalDevice)) {
  38
  39     RawFiFoRemoveOneKey (TerminalDevice, &RawData);
  40
  41     UnicodeFiFoInsertOneKey (TerminalDevice, (UINT16) RawData);
  42   }
  43 }
  44
  45 /**
  46   Check if input string is valid Ascii string, valid EFI control characters
  47   or valid text graphics.
  48
  49   @param  TerminalDevice          The terminal device.
  50   @param  WString                 The input string.
  51
  52   @retval EFI_UNSUPPORTED         If not all input characters are valid.
  53   @retval EFI_SUCCESS             If all input characters are valid.
  54
  55 **/
  56 EFI_STATUS
  57 AnsiTestString (
  58   IN  TERMINAL_DEV    *TerminalDevice,
  59   IN  CHAR16          *WString
  60   )
  61 {
  62   CHAR8 GraphicChar;
  63
  64   //
  65   // support three kind of character:
  66   // valid ascii, valid efi control char, valid text graphics.
  67   //
  68   for (; *WString != CHAR_NULL; WString++) {
  69
  70     if ( !(TerminalIsValidAscii (*WString) ||
  71         TerminalIsValidEfiCntlChar (*WString) ||
  72         TerminalIsValidTextGraphics (*WString, &GraphicChar, NULL) )) {
  73
  74       return EFI_UNSUPPORTED;
  75     }
  76   }
  77
  78   return EFI_SUCCESS;
  79 }