Wince character conversion (widechartomultibyte and multibytetowidechar) Method

During the development of wince, encoding conversion is often required, especially during serial communication. asni and wide character encoding conversion are often used. The following are common conversion methods.Asni and wide character encoding conversion are the most common.

During serial communication, you often need to check the hexadecimal encoding to determine the character encoding. Therefore, we must have a certain understanding of the asni and wide character encoding rules. In this regard, I will write a special post to explain this. The following describes common character conversion methods:

WidechartomultibyteCodePage is used to mark the code page related to the newly converted string.
The code page of multibytetowidechar is used to mark the code page related to a multi-byte string.
The common code pages are cp_acp and cp_utf8.
The cp_acp code page is used to convert ANSI to Unicode.
The cp_utf8 code page is used to realize the conversion between the UTF-8 and Unicode.
The following is code implementation:

 1  . ANSI to unicodewstring ansitounicode (  Const   String & Str ){  Int Len = 0  ; Len = Str. Length ();  Int Unicodelen = : Multibytetowidechar (cp_acp,  0  , Str. c_str (), - 1  , Null,  0  ); Wchar_t *Punicode; punicode = New Wchar_t [unicodelen + 1  ]; Memset (punicode,  0 , (Unicodelen + 1 )* Sizeof  (Wchar_t);: multibytetowidechar (cp_acp,  0  , Str. c_str (), - 1  , (Lpwstr) punicode, unicodelen); wstring RT; RT = (Wchar_t *) Punicode; Delete punicode;  Return  RT ;} 

 2  . Unicode to ANSI  String Unicodetoansi ( Const Wstring & Str ){  Char * Pelementtext;  Int  Itextlen;  //  Wide Char to multi char Itextlen =Widechartomultibyte (cp_acp,  0  , Str. c_str (), - 1  , Null,  0  , Null, null); pelementtext = New   Char [Itextlen + 1  ]; Memset ((  Void *) Pelementtext, 0 , Sizeof ( Char ) * (Itextlen + 1  );: Widechartomultibyte (cp_acp,  0  , Str. c_str (), - 1  , Pelementtext, itextlen, null, null );  String  Strtext; strtext = Pelementtext; Delete [] pelementtext;  Return  Strtext ;} 

 3 . UTF-8  To unicodewstring utf8tounicode (  Const   String & Str ){  Int Len = 0  ; Len = Str. Length ();  Int Unicodelen = : Multibytetowidechar (cp_utf8,  0  , Str. c_str (), - 1 , Null,  0  ); Wchar_t * Punicode; punicode = New Wchar_t [unicodelen + 1  ]; Memset (punicode,  0 , (Unicodelen + 1 )* Sizeof  (Wchar_t);: multibytetowidechar (cp_utf8,  0  , Str. c_str (), -1  , (Lpwstr) punicode, unicodelen); wstring RT; RT = (Wchar_t * ) Punicode; Delete punicode;  Return  RT ;} 

 4 . Unicode to UTF- 8      String Unicodetoutf8 ( Const Wstring & Str ){  Char * Pelementtext;  Int Itextlen;  //  Wide Char to multi char Itextlen = Widechartomultibyte (cp_utf8,  0  , Str. c_str (), - 1  , Null,  0  , Null, null); pelementtext = New   Char [Itextlen + 1 ]; Memset ((  Void *) Pelementtext, 0 , Sizeof ( Char ) * (Itextlen + 1  );: Widechartomultibyte (cp_utf8,  0  , Str. c_str (), - 1  , Pelementtext, itextlen, null, null );  String  Strtext; strtext =Pelementtext; Delete [] pelementtext;  Return  Strtext ;}