/*++

Copyright (c) 1998 Microsoft Corporation

Module Name:

    unicode.h

Abstract:

    Declares the interfaces for unicode/ansi conversion.

    When specific conversion is needed, use:

        unicode = ConvertAtoW (ansi) / FreeConvertedStr (unicode)
        ansi = ConvertWtoA (unicode) / FreeConvertedStr (ansi)

        KnownSizeAtoW (unicode,ansi)
        KnownSizeWtoA (ansi,unicode)

    When TCHAR conversion is needed, use:

        ansi = CreateDbcs (tchar) / DestroyDbcs (ansi)
        unicode = CreateUnicode (tchar) / DestroyUnicode (unicode)
        tchar = ConvertAtoT (ansi) / FreeAtoT (tchar)
        tchar = ConvertWtoT (ansi) / FreeWtoT (tchar)

Author:

    Jim Schmidt (jimschm)   02-Sep-1997

Revision History:

    jimschm 15-Feb-1999     Eliminated AnsiFromUnicode and UnicodeFromAnsi
    calinn  07-Jul-1998     SetGlobalPage/GetGlobalPage
    mikeco  03-Nov-1997     AnsiFromUnicode/UnicodeFromAnsi

--*/

#pragma once

extern WORD g_GlobalCodePage;

#define OurGetACP() (g_GlobalCodePage)

VOID
SetGlobalCodePage (
    IN      WORD CodePage,
    IN      LCID Locale
    );


VOID
GetGlobalCodePage (
    OUT     PWORD CodePage,             OPTIONAL
    OUT     PLCID Locale                OPTIONAL
    );


#define INVALID_CHAR_COUNT      0xffffffff

//
// Explicit conversions, pool-based, unlimited size
//

PCSTR
RealUnicodeToDbcsN (
    IN      POOLHANDLE Pool,            OPTIONAL
    IN      PCWSTR StrIn,
    IN      DWORD Chars
    );

PCWSTR
RealDbcsToUnicodeN (
    IN      POOLHANDLE Pool,            OPTIONAL
    IN      PCSTR StrIn,
    IN      DWORD Chars
    );

#define UnicodeToDbcsN(p,s,c)       SETTRACKCOMMENT(PCSTR,"UnicodeToDbcsN",__FILE__,__LINE__)\
                                    RealUnicodeToDbcsN(p,s,c)\
                                    CLRTRACKCOMMENT

#define DbcsToUnicodeN(p,s,c)       SETTRACKCOMMENT(PCWSTR,"DbcsToUnicodeN",__FILE__,__LINE__)\
                                    RealDbcsToUnicodeN(p,s,c)\
                                    CLRTRACKCOMMENT

#define UnicodeToDbcs(pool,str) UnicodeToDbcsN(pool,str,wcslen(str))
#define DbcsToUnicode(pool,str) DbcsToUnicodeN(pool,str,CharCountA(str))

#define ConvertWtoA(unicode_str) UnicodeToDbcsN(NULL,unicode_str,wcslen(unicode_str))
#define ConvertAtoW(dbcs_str) DbcsToUnicodeN(NULL,dbcs_str,CharCountA(dbcs_str))

VOID
FreeConvertedPoolStr (
    IN      POOLHANDLE Pool,            OPTIONAL
    IN      PVOID StrIn
    );

#define FreeConvertedStr(str) FreeConvertedPoolStr(NULL,(PVOID)(str))

//
// In-place explicit conversions, caller handles buffer sizing
//

PSTR
KnownSizeUnicodeToDbcsN (
    OUT     PSTR StrOut,
    IN      PCWSTR StrIn,
    IN      DWORD CharCount
    );

PWSTR
KnownSizeDbcsToUnicodeN (
    OUT     PWSTR StrOut,
    IN      PCSTR StrIn,
    IN      DWORD CharCount
    );

#define KnownSizeUnicodeToDbcs(out,in)      KnownSizeUnicodeToDbcsN(out,in,INVALID_CHAR_COUNT)
#define KnownSizeDbcsToUnicode(out,in)      KnownSizeDbcsToUnicodeN(out,in,INVALID_CHAR_COUNT)

#define KnownSizeWtoA                       KnownSizeUnicodeToDbcs
#define KnownSizeAtoW                       KnownSizeDbcsToUnicode

PSTR
DirectUnicodeToDbcsN (
    OUT     PSTR StrOut,
    IN      PCWSTR StrIn,
    IN      DWORD Bytes
    );

PWSTR
DirectDbcsToUnicodeN (
    OUT     PWSTR StrOut,
    IN      PCSTR StrIn,
    IN      DWORD Bytes
    );

#define DirectUnicodeToDbcs(out,in)         DirectUnicodeToDbcsN(out,in,INVALID_CHAR_COUNT)
#define DirectDbcsToUnicode(out,in)         DirectDbcsToUnicodeN(out,in,INVALID_CHAR_COUNT)

#define DirectWtoA                          DirectUnicodeToDbcs
#define DirectAtoW                          DirectDbcsToUnicode




//
// TCHAR conversions -- do not call A & W versions directly
//

#define CreateDbcsW(unicode_str)            ConvertWtoA(unicode_str)
#define DestroyDbcsW(unicode_str)           FreeConvertedStr(unicode_str)
#define CreateUnicodeW(unicode_str)         (unicode_str)
#define DestroyUnicodeW(unicode_str)
#define CreateDbcsA(dbcs_str)               (dbcs_str)
#define DestroyDbcsA(dbcs_str)
#define CreateUnicodeA(dbcs_str)            ConvertAtoW(dbcs_str)
#define DestroyUnicodeA(dbcs_str)           FreeConvertedStr(dbcs_str)

#ifdef UNICODE

#define CreateDbcs          CreateDbcsW
#define CreateUnicode       CreateUnicodeW
#define DestroyDbcs         DestroyDbcsW
#define DestroyUnicode      DestroyUnicodeW
#define ConvertAtoT         ConvertAtoW
#define ConvertWtoT(x)      (x)
#define FreeAtoT            FreeConvertedStr
#define FreeWtoT(x)

#define KnownSizeAtoT           KnownSizeAtoW
#define KnownSizeWtoT(out,in)   (in)

#define DirectAtoT              DirectAtoW
#define DirectWtoT(out,in)      (in)

#else

#define CreateDbcs          CreateDbcsA
#define CreateUnicode       CreateUnicodeA
#define DestroyDbcs         DestroyDbcsA
#define DestroyUnicode      DestroyUnicodeA
#define ConvertAtoT(x)      (x)
#define ConvertWtoT         ConvertWtoA
#define FreeAtoT(x)
#define FreeWtoT            FreeConvertedStr

#define KnownSizeAtoT(out,in)   (in)
#define KnownSizeWtoT           KnownSizeWtoA

#define DirectAtoT(out,in)      (in)
#define DirectWtoT              DirectWtoA

#endif