MdeModulePkg/Universal/Console/TerminalDxe/Ansi.c

   1 /** @file
   2   Implementation of translation upon PC ANSI.
   3
   4 Copyright (c) 2006 - 2008, Intel Corporation. <BR>
   5 All rights reserved. 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 FIFI into unicode, and insert
  20   them into Unicode FIFO.
  21
  22   @param TerminalDevice          The terminal device.
  23
  24   @return None.
  25
  26 **/
  27 VOID
  28 AnsiRawDataToUnicode (
  29   IN  TERMINAL_DEV    *TerminalDevice
  30   )
  31 {
  32   UINT8 RawData;
  33
  34   //
  35   // pop the raw data out from the raw fifo,
  36   // and translate it into unicode, then push
  37   // the unicode into unicode fifo, until the raw fifo is empty.
  38   //
  39   while (!IsRawFiFoEmpty (TerminalDevice)) {
  40
  41     RawFiFoRemoveOneKey (TerminalDevice, &RawData);
  42
  43     UnicodeFiFoInsertOneKey (TerminalDevice, (UINT16) RawData);
  44   }
  45 }
  46
  47 /**
  48   Check if input string is valid Ascii string, valid EFI control characters
  49   or valid text graphics.
  50
  51   @param  TerminalDevice          The terminal device.
  52   @param  WString                 The input string.
  53
  54   @retval EFI_UNSUPPORTED         If not all input characters are valid.
  55   @retval EFI_SUCCESS             If all input characters are valid.
  56
  57 **/
  58 EFI_STATUS
  59 AnsiTestString (
  60   IN  TERMINAL_DEV    *TerminalDevice,
  61   IN  CHAR16          *WString
  62   )
  63 {
  64   CHAR8 GraphicChar;
  65
  66   //
  67   // support three kind of character:
  68   // valid ascii, valid efi control char, valid text graphics.
  69   //
  70   for (; *WString != CHAR_NULL; WString++) {
  71
  72     if ( !(TerminalIsValidAscii (*WString) ||
  73         TerminalIsValidEfiCntlChar (*WString) ||
  74         TerminalIsValidTextGraphics (*WString, &GraphicChar, NULL) )) {
  75
  76       return EFI_UNSUPPORTED;
  77     }
  78   }
  79
  80   return EFI_SUCCESS;
  81 }