windows-server-2003/shell/ext/mlang/fechmap.cpp

/*----------------------------------------------------------------------------
    %%File: fechmap.c
    %%Unit: fechmap
    %%Contact: jpick

    DLL entry points for FarEast conversion module.
----------------------------------------------------------------------------*/

#include "private.h"
#include "fechmap_.h"

#include "codepage.h"

static CODEPAGE _mpicetce[icetCount] =
{
    CP_EUC_CH,              // icetEucCn
    CP_EUC_JP,              // icetEucJp
    CP_EUC_KR,              // icetEucKr
    CP_UNDEFINED,           // icetEucTw        (Not externally supported)
    CP_UNDEFINED,           // icetIso2022Cn    (Not externally supported)
    CP_ISO_2022_JP,         // icetIso2022Jp
    CP_ISO_2022_KR,         // icetIso2022Kr
    CP_UNDEFINED,           // icetIso2022Tw    (Not externally supported)
    CP_TWN,                 // icetBig5
    CP_CHN_GB,              // icetGbk
    CP_CHN_HZ,              // icetHz
    CP_JPN_SJ,              // icetShiftJis
    CP_KOR_5601,            // icetWansung
    CP_UTF_7,               // icetUtf7
    CP_UTF_8,               // icetUtf8
};

/* C C E  D E T E C T  I N P U T  C O D E */
/*----------------------------------------------------------------------------
    %%Function: CceDetectInputCode
    %%Contact: jpick

    Routine that will analyze contents of file to make a best guess
    as to what encoding method was used on it.  Caller-supplied get
    and unget routines used for data access.
----------------------------------------------------------------------------*/
EXPIMPL(CCE)
CceDetectInputCode(
    IStream   *pstmIn,           // input stream
    DWORD     dwFlags,          // configuration flags
    EFam      efPref,           // optional: preferred encoding family
    int       nPrefCp,          // optional: preferred code page
    UINT      *lpCe,                // set to detected encoding
    BOOL      *lpfGuess         // set to fTrue if function "guessed"
)
{
    CCE cceRet;
    ICET icet;
    
    if (!pstmIn || !lpCe || !lpfGuess)
        return cceInvalidParameter;
        
    // DEBUG, only.  Prepare the assert handler.  This macro will
    // return cceInternal to the calling app if an assert is hit
    // before the handler is cleared, below.
    //
    //  InitAndCatchAsserts();
        
    cceRet = CceDetermineInputType(pstmIn, dwFlags, efPref, 
                    nPrefCp, &icet, lpfGuess);
    
    if ((cceRet == cceSuccess) || (cceRet == cceMayBeAscii))
        {
        if (_mpicetce[icet] != CP_UNDEFINED )
            *lpCe = (UINT) _mpicetce[icet];
        else
            cceRet = cceUnknownInput;
        }
        
    // Done with the assert handler.
    //
    //  ClearAsserts();

    return cceRet;
}