CODEPAGE.C

/******************************************************************************\ 
*       This is a part of the Microsoft Source Code Samples.  
*       Copyright 1993 - 1998 Microsoft Corporation. 
*       All rights reserved.  
*       This source code is only intended as a supplement to  
*       Microsoft Development Tools and/or WinHelp documentation. 
*       See these sources for detailed information regarding the  
*       Microsoft samples programs. 
\******************************************************************************/ 
 
#include <windows.h> 
#include <stdlib.h> 
#include <stdio.h> 
#include "console.h" 
 
/* Note: demos for Get/SetConsoleCP not implemented */ 
 
/********************************************************************* 
* FUNCTION: showCP(HANDLE hConOut, UINT uiCP)                        * 
*                                                                    * 
* PURPOSE: dump the 256 character set in the given codepage          * 
*                                                                    * 
* INPUT: the console output handle to use and the desired code page  * 
*        to display the characters in                                * 
*********************************************************************/ 
 
void showCP(HANDLE hConOut, UINT uiCP) 
{ 
  BOOL bSuccess; 
  DWORD dwSaveMode; /* store the current console mode to restore later */ 
  UINT uiSaveCP; /* store the current code page to restore later */ 
  int i; 
  DWORD dwWritten; 
   
  /* save the current output mode and code page */ 
  uiSaveCP = GetConsoleOutputCP(); 
  bSuccess = GetConsoleMode(hConOut, &dwSaveMode); 
  PERR(bSuccess, "GetconsoleMode"); 
  /* turn off processed output so that all chars will display */ 
  bSuccess = SetConsoleMode(hConOut, dwSaveMode & ~ENABLE_PROCESSED_OUTPUT); 
  PERR(bSuccess, "SetConsoleMode"); 
  bSuccess = SetConsoleOutputCP(uiCP); 
  PERR(bSuccess, "SetConsoleOutputCP"); 
  for (i = 0; i < 256; i++) 
    WriteConsole(hConOut, &i, 1, &dwWritten, NULL); 
  /* now reset to original code page and output mode */ 
  SetConsoleOutputCP(uiSaveCP); 
  bSuccess = SetConsoleMode(hConOut, dwSaveMode); 
  PERR(bSuccess, "SetConsoleMode"); 
  return; 
} 
 
/********************************************************************* 
* FUNCTION: demoOutputCodePage(HANDLE hConOut)                       * 
*                                                                    * 
* PURPOSE: demonstrate SetConsoleOutputCP and GetConsoleOutputCP.    * 
*          Dump the 256 character set for each code paged installed  * 
*          in the system.                                            * 
*                                                                    * 
* INPUT: the console output handle to manipulate the codepage for    * 
*********************************************************************/ 
 
void demoOutputCodePage(HANDLE hConOut) 
{ 
  DWORD iValue = 0; /* index value for RegEnumValue */ 
  LONG lSuccess; /* registry API return code */ 
  HKEY hKey; /* handle to registry key containing codepage info */ 
  char szValue[16], szData[16]; /* value and data info from registry */ 
  DWORD dwType, cchValue, cbData; 
  UINT uiCP; /* the code page number that we extract from the registry */ 
  char szTemp[128]; 
  BOOL bSuccess; 
  OSVERSIONINFO osVer; /* for GetVersionEx() */ 
 
  /* check if Win95, if so, display notice and return - the console codepage */ 
  /* APIs are not supported under Win95. */ 
  osVer.dwOSVersionInfoSize = sizeof(osVer); 
  bSuccess = GetVersionEx(&osVer); 
  PERR(bSuccess, "GetVersionEx"); 
  if (osVer.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) 
    { 
    MessageBox(NULL,  
        "The console codepage APIs are not supported on Windows 95", 
        "Console API Test Application", MB_OK ); 
    return; 
    } 
  setConTitle(__FILE__); 
  /* set the color for future text output */ 
  bSuccess = SetConsoleTextAttribute(hConOut, FOREGROUND_YELLOW | 
      FOREGROUND_INTENSITY | BACKGROUND_BLUE); 
  PERR(bSuccess, "SetConsoleTextAttribute"); 
  cls(hConOut); /* clear screen to new attributes */ 
  myPuts(hConOut, "Warning: code page info will not display properly unless you are\n" 
         "using a TrueType font in the console. From the system menu, select\n" 
         "Fonts, then select a TrueType font from the list available."); 
  /* open the key containing all the code page info */ 
  lSuccess = RegOpenKeyEx(HKEY_LOCAL_MACHINE, 
    "SYSTEM\\CurrentControlSet\\Control\\Nls\\CodePage", 0, KEY_QUERY_VALUE, 
    &hKey); 
  PERR(lSuccess == ERROR_SUCCESS, "RegOpenKeyEx"); 
  while(TRUE) 
  { 
    cchValue = sizeof(szValue); 
    cbData = sizeof(szData); 
    /* get the next code page entry */ 
    lSuccess = RegEnumValue(hKey, iValue++, szValue, &cchValue, NULL, 
      &dwType, szData, &cbData); 
    if (lSuccess == ERROR_NO_MORE_ITEMS) 
      break; 
    if (!szData[0]) /* if value data is NULL, it's an invalid code page; skip */ 
      continue; 
    if (!(uiCP = atoi(szValue))) /* if value name is not a number, skip */ 
      continue; 
    sprintf(szTemp, "\n\nCodepage: %s", szValue); 
    myPuts(hConOut, szTemp); 
    /* set code page and display all 256 chars on the console */ 
    showCP(hConOut, uiCP); 
  } 
  myPuts(hConOut, "\n\nHit enter to continue..."); 
  myGetchar(); 
  return; 
} 
 
 
/********************************************************************* 
* FUNCTION: demoInputCodePage(HANDLE hConOut)                        * 
*                                                                    * 
* PURPOSE: demonstrate SetConsoleInputCP and GetConsoleInputCP.      * 
*          Read and display keyboard input, including special chars. * 
*                                                                    * 
* INPUT: the console output handle to manipulate the codepage for    * 
*********************************************************************/ 
 
void demoInputCodePage(HANDLE hConOut) 
{ 
  myPuts(hConOut, "SetConsoleCP and GetConsoleCP demos"); 
  myPuts(hConOut, "not implemented yet."); 
  myPuts(hConOut, "\n\nHit enter to continue..."); 
  myGetchar(); 
  return; 
}