584 lines
14 KiB
C++
584 lines
14 KiB
C++
#include "stock.h"
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#pragma hdrstop
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#include "cstrinout.h"
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//+---------------------------------------------------------------------------
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//
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// Member: CConvertStr::Free
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//
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// Synopsis: Frees string if alloc'd and initializes to NULL.
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//
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//----------------------------------------------------------------------------
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void
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CConvertStr::Free()
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{
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if (_pstr != _ach && HIWORD64(_pstr) != 0 && !IsAtom())
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{
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delete [] _pstr;
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}
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_pstr = NULL;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CConvertStrW::Free
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//
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// Synopsis: Frees string if alloc'd and initializes to NULL.
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//
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//----------------------------------------------------------------------------
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void
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CConvertStrW::Free()
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{
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if (_pwstr != _awch && HIWORD64(_pwstr) != 0)
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{
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delete [] _pwstr;
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}
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_pwstr = NULL;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrInW::Init
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//
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// Synopsis: Converts a LPSTR function argument to a LPWSTR.
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//
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// Arguments: [pstr] -- The function argument. May be NULL or an atom
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// (HIWORD64(pwstr) == 0).
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//
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// [cch] -- The number of characters in the string to
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// convert. If -1, the string is assumed to be
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// NULL terminated and its length is calculated.
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//
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// Modifies: [this]
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//
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//----------------------------------------------------------------------------
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void
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CStrInW::Init(LPCSTR pstr, int cch)
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{
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int cchBufReq;
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_cwchLen = 0;
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// Check if string is NULL or an atom.
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if (HIWORD64(pstr) == 0)
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{
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_pwstr = (LPWSTR) pstr;
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return;
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}
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ASSERT(cch == -1 || cch > 0);
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//
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// Convert string to preallocated buffer, and return if successful.
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//
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// Since the passed in buffer may not be null terminated, we have
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// a problem if cch==ARRAYSIZE(_awch), because MultiByteToWideChar
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// will succeed, and we won't be able to null terminate the string!
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// Decrease our buffer by one for this case.
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//
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_cwchLen = MultiByteToWideChar(
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CP_ACP, 0, pstr, cch, _awch, ARRAYSIZE(_awch)-1);
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if (_cwchLen > 0)
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{
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// Some callers don't NULL terminate.
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//
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// We could check "if (-1 != cch)" before doing this,
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// but always doing the null is less code.
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//
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_awch[_cwchLen] = 0;
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if (0 == _awch[_cwchLen-1]) // account for terminator
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_cwchLen--;
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_pwstr = _awch;
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return;
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}
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//
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// Alloc space on heap for buffer.
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//
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cchBufReq = MultiByteToWideChar( CP_ACP, 0, pstr, cch, NULL, 0 );
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// Again, leave room for null termination
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cchBufReq++;
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ASSERT(cchBufReq > 0);
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_pwstr = new WCHAR[cchBufReq];
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if (!_pwstr)
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{
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// On failure, the argument will point to the empty string.
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_awch[0] = 0;
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_pwstr = _awch;
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return;
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}
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ASSERT(HIWORD64(_pwstr));
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_cwchLen = MultiByteToWideChar(
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CP_ACP, 0, pstr, cch, _pwstr, cchBufReq );
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#if DBG == 1 /* { */
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if (0 == _cwchLen)
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{
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int errcode = GetLastError();
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ASSERT(0 && "MultiByteToWideChar failed in unicode wrapper.");
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}
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#endif /* } */
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// Again, make sure we're always null terminated
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ASSERT(_cwchLen < cchBufReq);
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_pwstr[_cwchLen] = 0;
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if (0 == _pwstr[_cwchLen-1]) // account for terminator
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_cwchLen--;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrIn::CStrIn
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//
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// Synopsis: Inits the class.
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//
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// NOTE: Don't inline this function or you'll increase code size
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// by pushing -1 on the stack for each call.
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//
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//----------------------------------------------------------------------------
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CStrIn::CStrIn(LPCWSTR pwstr) : CConvertStr(CP_ACP)
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{
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Init(pwstr, -1);
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}
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CStrIn::CStrIn(UINT uCP, LPCWSTR pwstr) : CConvertStr(uCP)
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{
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Init(pwstr, -1);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrIn::Init
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//
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// Synopsis: Converts a LPWSTR function argument to a LPSTR.
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//
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// Arguments: [pwstr] -- The function argument. May be NULL or an atom
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// (HIWORD(pwstr) == 0).
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//
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// [cwch] -- The number of characters in the string to
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// convert. If -1, the string is assumed to be
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// NULL terminated and its length is calculated.
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//
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// Modifies: [this]
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//
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// Note: We ignore AreFileApisANSI() and always use CP_ACP.
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// The reason is that nobody uses SetFileApisToOEM() except
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// console apps, and once you set file APIs to OEM, you
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// cannot call shell/user/gdi APIs, since they assume ANSI
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// regardless of the FileApis setting. So you end up in
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// this horrible messy state where the filename APIs interpret
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// the strings as OEM but SHELL32 interprets the strings
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// as ANSI and you end up with a big mess.
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//
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//----------------------------------------------------------------------------
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void
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CStrIn::Init(LPCWSTR pwstr, int cwch)
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{
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int cchBufReq;
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#if DBG == 1 /* { */
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int errcode;
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#endif /* } */
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_cchLen = 0;
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// Check if string is NULL or an atom.
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if (HIWORD64(pwstr) == 0 || IsAtom())
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{
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_pstr = (LPSTR) pwstr;
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return;
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}
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if ( cwch == 0 )
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{
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*_ach = '\0';
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_pstr = _ach;
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return;
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}
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//
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// Convert string to preallocated buffer, and return if successful.
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//
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_cchLen = WideCharToMultiByte(
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_uCP, 0, pwstr, cwch, _ach, ARRAYSIZE(_ach)-1, NULL, NULL);
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if (_cchLen > 0)
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{
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// This is DBCS safe since byte before _cchLen is last character
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_ach[_cchLen] = 0;
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// this may not be safe if the last character
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// was a multibyte character...
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if (_ach[_cchLen-1]==0)
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_cchLen--; // account for terminator
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_pstr = _ach;
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return;
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}
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cchBufReq = WideCharToMultiByte(
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CP_ACP, 0, pwstr, cwch, NULL, 0, NULL, NULL);
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cchBufReq++;
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ASSERT(cchBufReq > 0);
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_pstr = new char[cchBufReq];
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if (!_pstr)
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{
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// On failure, the argument will point to the empty string.
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_ach[0] = 0;
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_pstr = _ach;
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return;
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}
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ASSERT(HIWORD64(_pstr));
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_cchLen = WideCharToMultiByte(
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_uCP, 0, pwstr, cwch, _pstr, cchBufReq, NULL, NULL);
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#if DBG == 1 /* { */
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if (_cchLen < 0)
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{
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errcode = GetLastError();
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ASSERT(0 && "WideCharToMultiByte failed in unicode wrapper.");
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}
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#endif /* } */
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// Again, make sure we're always null terminated
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ASSERT(_cchLen < cchBufReq);
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_pstr[_cchLen] = 0;
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if (0 == _pstr[_cchLen-1]) // account for terminator
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_cchLen--;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrInMulti::CStrInMulti
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//
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// Synopsis: Converts mulitple LPWSTRs to a multiple LPSTRs.
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//
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// Arguments: [pwstr] -- The strings to convert.
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//
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// Modifies: [this]
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//
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//----------------------------------------------------------------------------
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CStrInMulti::CStrInMulti(LPCWSTR pwstr)
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{
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LPCWSTR pwstrT;
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// We don't handle atoms because we don't need to.
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ASSERT(HIWORD64(pwstr));
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//
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// Count number of characters to convert.
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//
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pwstrT = pwstr;
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if (pwstr)
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{
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do {
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while (*pwstrT++)
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;
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} while (*pwstrT++);
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}
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Init(pwstr, (int)(pwstrT - pwstr));
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CPPFIn::CPPFIn
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//
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// Synopsis: Inits the class. Truncates the filename to MAX_PATH
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// so Win9x DBCS won't fault. Win9x SBCS silently truncates
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// to MAX_PATH, so we're bug-for-bug compatible.
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//
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//----------------------------------------------------------------------------
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CPPFIn::CPPFIn(LPCWSTR pwstr)
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{
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SHUnicodeToAnsi(pwstr, _ach, ARRAYSIZE(_ach));
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrOut::CStrOut
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//
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// Synopsis: Allocates enough space for an out buffer.
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//
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// Arguments: [pwstr] -- The Unicode buffer to convert to when destroyed.
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// May be NULL.
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//
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// [cwchBuf] -- The size of the buffer in characters.
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//
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// Modifies: [this].
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//
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//----------------------------------------------------------------------------
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CStrOut::CStrOut(LPWSTR pwstr, int cwchBuf) : CConvertStr(CP_ACP)
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{
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Init(pwstr, cwchBuf);
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}
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CStrOut::CStrOut(UINT uCP, LPWSTR pwstr, int cwchBuf) : CConvertStr(uCP)
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{
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Init(pwstr, cwchBuf);
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}
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void
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CStrOut::Init(LPWSTR pwstr, int cwchBuf)
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{
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ASSERT(cwchBuf >= 0);
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_pwstr = pwstr;
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_cwchBuf = cwchBuf;
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if (!pwstr)
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{
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// Force cwchBuf = 0 because many callers (in particular, registry
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// munging functions) pass garbage as the length because they know
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// it will be ignored.
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_cwchBuf = 0;
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_pstr = NULL;
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return;
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}
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ASSERT(HIWORD64(pwstr));
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// Initialize buffer in case Windows API returns an error.
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_ach[0] = 0;
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// Use preallocated buffer if big enough.
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if (cwchBuf * 2 <= ARRAYSIZE(_ach))
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{
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_pstr = _ach;
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return;
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}
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// Allocate buffer.
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_pstr = new char[cwchBuf * 2];
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if (!_pstr)
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{
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//
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// On failure, the argument will point to a zero-sized buffer initialized
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// to the empty string. This should cause the Windows API to fail.
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//
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ASSERT(cwchBuf > 0);
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_pwstr[0] = 0;
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_cwchBuf = 0;
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_pstr = _ach;
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return;
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}
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ASSERT(HIWORD64(_pstr));
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_pstr[0] = 0;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrOutW::CStrOutW
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//
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// Synopsis: Allocates enough space for an out buffer.
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//
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// Arguments: [pstr] -- The MBCS buffer to convert to when destroyed.
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// May be NULL.
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//
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// [cchBuf] -- The size of the buffer in characters.
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//
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// Modifies: [this].
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//
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//----------------------------------------------------------------------------
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CStrOutW::CStrOutW(LPSTR pstr, int cchBuf)
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{
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ASSERT(cchBuf >= 0);
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_pstr = pstr;
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_cchBuf = cchBuf;
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if (!pstr)
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{
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// Force cchBuf = 0 because many callers (in particular, registry
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// munging functions) pass garbage as the length because they know
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// it will be ignored.
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_cchBuf = 0;
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_pwstr = NULL;
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return;
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}
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ASSERT(HIWORD64(pstr));
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// Initialize buffer in case Windows API returns an error.
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_awch[0] = 0;
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// Use preallocated buffer if big enough.
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if (cchBuf <= ARRAYSIZE(_awch))
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{
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_pwstr = _awch;
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return;
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}
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// Allocate buffer.
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_pwstr = new WCHAR[cchBuf];
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if (!_pwstr)
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{
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//
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// On failure, the argument will point to a zero-sized buffer initialized
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// to the empty string. This should cause the Windows API to fail.
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//
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ASSERT(cchBuf > 0);
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_pstr[0] = 0;
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_cchBuf = 0;
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_pwstr = _awch;
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return;
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}
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ASSERT(HIWORD64(_pwstr));
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_pwstr[0] = 0;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrOut::ConvertIncludingNul
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//
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// Synopsis: Converts the buffer from MBCS to Unicode
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//
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// Return: Character count INCLUDING the trailing '\0'
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//
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//----------------------------------------------------------------------------
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int
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CStrOut::ConvertIncludingNul()
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{
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int cch;
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if (!_pstr)
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return 0;
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cch = SHAnsiToUnicodeCP(_uCP, _pstr, _pwstr, _cwchBuf);
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#if DBG == 1 /* { */
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if (cch == 0 && _cwchBuf > 0)
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{
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int errcode = GetLastError();
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ASSERT(0 && "SHAnsiToUnicode failed in unicode wrapper.");
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}
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#endif /* } */
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Free();
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return cch;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CStrOutW::ConvertIncludingNul
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//
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// Synopsis: Converts the buffer from Unicode to MBCS
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//
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// Return: Character count INCLUDING the trailing '\0'
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//
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//----------------------------------------------------------------------------
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int
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CStrOutW::ConvertIncludingNul()
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{
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int cch;
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if (!_pwstr)
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return 0;
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cch = SHUnicodeToAnsi(_pwstr, _pstr, _cchBuf);
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#if DBG == 1 /* { */
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if (cch == 0 && _cchBuf > 0)
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{
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int errcode = GetLastError();
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ASSERT(0 && "SHUnicodeToAnsi failed in unicode wrapper.");
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}
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#endif /* } */
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Free();
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return cch;
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}
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|
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//+---------------------------------------------------------------------------
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//
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// Member: CStrOut::ConvertExcludingNul
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//
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// Synopsis: Converts the buffer from MBCS to Unicode
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//
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// Return: Character count EXCLUDING the trailing '\0'
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//
|
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//----------------------------------------------------------------------------
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int
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CStrOut::ConvertExcludingNul()
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{
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int ret = ConvertIncludingNul();
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if (ret > 0)
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{
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ret -= 1;
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}
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return ret;
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}
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|
|
|
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//+---------------------------------------------------------------------------
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//
|
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// Member: CStrOut::~CStrOut
|
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//
|
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// Synopsis: Converts the buffer from MBCS to Unicode.
|
|
//
|
|
// Note: Don't inline this function, or you'll increase code size as
|
|
// both ConvertIncludingNul() and CConvertStr::~CConvertStr will be
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// called inline.
|
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//
|
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//----------------------------------------------------------------------------
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|
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CStrOut::~CStrOut()
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{
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ConvertIncludingNul();
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}
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|
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//+---------------------------------------------------------------------------
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//
|
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// Member: CStrOutW::~CStrOutW
|
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//
|
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// Synopsis: Converts the buffer from Unicode to MBCS.
|
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//
|
|
// Note: Don't inline this function, or you'll increase code size as
|
|
// both ConvertIncludingNul() and CConvertStr::~CConvertStr will be
|
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// called inline.
|
|
//
|
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//----------------------------------------------------------------------------
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|
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CStrOutW::~CStrOutW()
|
|
{
|
|
ConvertIncludingNul();
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}
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