source: trunk/ab5.0/ablib/src/system/string.sbp

'string.sbp
'文字列変数の操作用

/*!
@brief Stringが内部で保持しているポインタを返す。
@param[in] s 文字列。
@return sの内部バッファへのポインタ、ただしsがNothingならNULL。
*/
Function StrPtr(s As String) As *Char
    If Not ActiveBasic.IsNothing(s) Then
        StrPtr = s.StrPtr
    End If
End Function
'StringBuilder版はClasses/System/Text/StringBuilder.abに定義されている。

/*!
@brief 指定した長さの空文字(\0)を持つ文字列を作成する。
@param[in] length 長さ
@return Legnth = lengthとなっている文字列。
*/
Function ZeroString(length As Long) As String 
    ZeroString = New String(0 As Char, length) 
End Function 

Function MakeStr(psz As PSTR) As String
    Return New String(psz)
End Function

Function MakeStr(psz As PWSTR) As String
    Return New String(psz)
End Function

Dim _System_AllocForConvertedString As *Function(size As SIZE_T) As VoidPtr
_System_AllocForConvertedString = AddressOf (GC_malloc_atomic)

Namespace Detail
    Function GetWCStr(mbsSrc As PSTR, len As SIZE_T, ByRef wcsDst As PWSTR) As SIZE_T
        Dim lenWCS = MultiByteToWideChar(CP_ACP, 0, mbsSrc, (len As DWord) As Long, 0, 0)
        wcsDst = _System_AllocForConvertedString(SizeOf (WCHAR) * (lenWCS + 1)) As PWSTR
        GetWCStr = MultiByteToWideChar(CP_ACP, 0, mbsSrc, (len As DWord) As Long, wcsDst, lenWCS)
        wcsDst[lenWCS] = 0
    End Function

    Function GetWCStr(wcsSrc As PWSTR, len As SIZE_T, ByRef wcsDst As PWSTR) As SIZE_T
        wcsDst = wcsSrc
        GetWCStr = len
    End Function

    Function GetMBStr(wcsSrc As PWSTR, len As SIZE_T, ByRef mbsDst As PSTR) As SIZE_T
        Dim lenMBS = WideCharToMultiByte(CP_ACP, 0, wcsSrc, (len As DWord) As Long, 0, 0, 0, 0)
        mbsDst = _System_AllocForConvertedString(SizeOf (CHAR) * (lenMBS + 1)) As PSTR
        GetMBStr = WideCharToMultiByte(CP_ACP, 0, wcsSrc, (len As DWord) As Long, mbsDst, lenMBS, 0, 0) As SIZE_T
        mbsDst[lenMBS] = 0
    End Function

    Function GetMBStr(mbsSrc As PSTR, len As SIZE_T, ByRef mbsDst As PSTR) As SIZE_T
        mbsDst = mbsSrc
        GetMBStr = len
    End Function

    ' ToTCStrの補助
    Sub GetStrNT(mbszSrc As PSTR, ByRef mbszDst As PSTR)
        mbszDst = mbszSrc
    End Sub

    Sub GetStrNT(mbszSrc As PSTR, ByRef wcszDst As PWSTR)
        GetStr(mbszSrc, wcszDst)
    End Sub

    Sub GetStrNT(wcszSrc As PWSTR, ByRef mbszDst As PSTR)
        GetStr(wcszSrc, mbszDst)
    End Sub

    Sub GetStrNT(wcszSrc As PWSTR, ByRef wcszDst As PWSTR)
        wcszDst = wcszSrc
    End Sub

End Namespace

/*
変換の組み合わせは、
入力引数: wcsz, wcs + len, mbsz, mbs + len, str
出力関数: wcs(z)出力GetStr, mbs(z)出力GetStr, ToWCStr, ToMBStr, ToTCStr,
で、5 * 5 = 25通り。
*/

Function GetStr(mbszSrc As PSTR, ByRef wcsDst As PWSTR) As SIZE_T
    If mbszSrc = 0 Then
        wcsDst = 0
        Return 0
    Else
        Return Detail.GetWCStr(mbszSrc, lstrlenA(mbszSrc) As SIZE_T, wcsDst)
    End If
End Function

Function GetStr(mbsSrc As PSTR, len As SIZE_T, ByRef wcsDst As PWSTR) As SIZE_T
    If mbsSrc = 0 Then
        wcsDst = 0
        Return 0
    Else
        Return Detail.GetWCStr(mbsSrc, len, wcsDst)
    End If
End Function

Function GetStr(wcszSrc As PWSTR, ByRef wcsDst As PWSTR) As SIZE_T
    If wcszSrc = 0 Then
        wcsDst = 0
        Return 0
    Else
        wcsDst = wcszSrc
        Return lstrlenW(wcszSrc) As SIZE_T + 1
    End If
End Function

Function GetStr(wcsSrc As PWSTR, len As SIZE_T, ByRef wcsDst As PWSTR) As SIZE_T
    If wcsSrc = 0 Then
        wcsDst = 0
        Return 0
    Else
        wcsDst = wcsSrc
        Return len
    End If
End Function

Function GetStr(wcszSrc As PWSTR, ByRef mbsDst As PSTR) As SIZE_T
    If wcszSrc = 0 Then
        mbsDst = 0
        Return 0
    Else
        Return Detail.GetMBStr(wcszSrc, lstrlenW(wcszSrc) As SIZE_T, mbsDst)
    End If
End Function

Function GetStr(wcsSrc As PWSTR, len As SIZE_T, ByRef mbsDst As PSTR) As SIZE_T
    If wcsSrc = 0 Then
        mbsDst = 0
        Return 0
    Else
        Return Detail.GetMBStr(wcsSrc, len As SIZE_T, mbsDst)
    End If
End Function

Function GetStr(mbszSrc As PSTR, ByRef mbsDst As PSTR) As SIZE_T
    If mbszSrc = 0 Then
        mbsDst = 0
        Return 0
    Else
        mbsDst = mbszSrc
        Return lstrlenA(mbszSrc) As SIZE_T + 1
    End If
End Function

Function GetStr(mbsSrc As PSTR, len As SIZE_T, ByRef mbsDst As PSTR) As SIZE_T
    If mbsSrc = 0 Then
        mbsDst = 0
        Return len
    Else
        mbsDst = mbsSrc
        Return 0
    End If
End Function

Function GetStr(strSrc As String, ByRef wcsDst As PWSTR) As SIZE_T
    If ActiveBasic.IsNothing(strSrc) Then
        wcsDst = 0
        Return 0
    Else
        Return Detail.GetWCStr(strSrc.StrPtr, strSrc.Length As SIZE_T, wcsDst)
    End If
End Function

Function GetStr(strSrc As String, ByRef mbsDst As PSTR) As SIZE_T
    If ActiveBasic.IsNothing(strSrc) Then
        mbsDst = 0
        Return 0
    Else
        Return Detail.GetMBStr(strSrc.StrPtr, strSrc.Length As SIZE_T, mbsDst)
    End If
End Function

Function ToWCStr(mbsz As PSTR) As PWSTR
    Detail.GetStrNT(mbsz, ToWCStr)
End Function

Function ToWCStr(mbs As PSTR, len As SIZE_T) As PWSTR
    GetStr(mbs, len, ToWCStr)
End Function

Function ToWCStr(wcsz As PWSTR) As PWSTR
    ToWCStr = wcsz
End Function

Function ToWCStr(wcs As PWSTR, len As SIZE_T) As PWSTR
    ToWCStr = wcs
End Function

Function ToWCStr(s As String) As PWSTR
    GetStr(s, ToWCStr)
End Function

Function ToMBStr(mbsz As PSTR) As PSTR
    ToMBStr = mbsz
End Function

Function ToMBStr(mbs As PSTR, len As SIZE_T) As PSTR
    ToMBStr = mbs
End Function

Function ToMBStr(wcsz As PWSTR) As PSTR
    Detail.GetStrNT(wcsz, ToMBStr)
End Function

Function ToMBStr(wcs As PWSTR, len As SIZE_T) As PSTR
    GetStr(wcs, len, ToMBStr)
End Function

Function ToMBStr(s As String) As PSTR
    GetStr(s, ToMBStr)
End Function

Function ToTCStr(mbsz As PSTR) As PCTSTR
    Detail.GetStrNT(mbsz, ToTCStr)
End Function

Function ToTCStr(mbs As PSTR, len As SIZE_T) As PCTSTR
    GetStr(mbs, len, ToTCStr)
End Function

Function ToTCStr(wcsz As PWSTR) As PCTSTR
    Detail.GetStrNT(wcsz, ToTCStr)
End Function

Function ToTCStr(wcs As PWSTR, len As SIZE_T) As PCTSTR
    GetStr(wcs, len, ToTCStr)
End Function

Function ToTCStr(s As String) As PCTSTR
    Return StrPtr(s)
End Function

#ifndef UNICODE
TypeDef BoxedStrChar = System.SByte
#else
TypeDef BoxedStrChar = System.UInt16
#endif