diff options
Diffstat (limited to 'win')
| -rw-r--r-- | win/tclWin32Dll.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/win/tclWin32Dll.c b/win/tclWin32Dll.c index bc28032..da1cdfe 100644 --- a/win/tclWin32Dll.c +++ b/win/tclWin32Dll.c @@ -487,35 +487,32 @@ TclWinDriveLetterForVolMountPoint( * * Tcl_WinUtfToTChar, Tcl_WinTCharToUtf -- * - * Convert between UTF-8 and Unicode when running Windows NT or the - * current ANSI code page when running Windows 95. + * Convert between UTF-8 and Unicode when running Windows. * - * On Mac, Unix, and Windows 95, all strings exchanged between Tcl and - * the OS are "char" oriented. We need only one Tcl_Encoding to convert - * between UTF-8 and the system's native encoding. We use NULL to - * represent that encoding. + * On Mac and Unix, all strings exchanged between Tcl and the OS are + * "char" oriented. We need only one Tcl_Encoding to convert between + * UTF-8 and the system's native encoding. We use NULL to represent + * that encoding. * - * On NT, some strings exchanged between Tcl and the OS are "char" + * On Windows, some strings exchanged between Tcl and the OS are "char" * oriented, while others are in Unicode. We need two Tcl_Encoding APIs * depending on whether we are targeting a "char" or Unicode interface. * - * Calling Tcl_UtfToExternal() or Tcl_ExternalToUtf() with an encoding of - * NULL should always used to convert between UTF-8 and the system's + * Calling Tcl_UtfToExternal() or Tcl_ExternalToUtf() with an encoding + * of NULL should always used to convert between UTF-8 and the system's * "char" oriented encoding. The following two functions are used in - * Windows-specific code to convert between UTF-8 and Unicode strings - * (NT) or "char" strings(95). This saves you the trouble of writing the + * Windows-specific code to convert between UTF-8 and Unicode strings. + * This saves you the trouble of writing the * following type of fragment over and over: * * encoding <- Tcl_GetEncoding("unicode"); * nativeBuffer <- UtfToExternal(encoding, utfBuffer); * Tcl_FreeEncoding(encoding); * - * By convention, in Windows a TCHAR is a character in the ANSI code page - * on Windows 95, a Unicode character on Windows NT. If you plan on - * targeting a Unicode interfaces when running on NT and a "char" - * oriented interface while running on 95, these functions should be - * used. If you plan on targetting the same "char" oriented function on - * both 95 and NT, use Tcl_UtfToExternal() with an encoding of NULL. + * By convention, in Windows a TCHAR is a Unicode character. If you plan + * on targeting a Unicode interface when running on Windows, these + * functions should be used. If you plan on targetting a "char" oriented + * function on Windows, use Tcl_UtfToExternal() with an encoding of NULL. * * Results: * The result is a pointer to the string in the desired target encoding. @@ -544,6 +541,7 @@ Tcl_WinUtfToTChar( Tcl_DStringSetLength(dsPtr, 2*size+2); wp = (TCHAR *)Tcl_DStringValue(dsPtr); MultiByteToWideChar(CP_UTF8, 0, string, len, wp, size+1); + if (len == -1) --size; /* account for 0-byte at string end */ Tcl_DStringSetLength(dsPtr, 2*size); wp[size] = 0; return wp; @@ -573,6 +571,7 @@ Tcl_WinTCharToUtf( Tcl_DStringSetLength(dsPtr, size+1); p = (char *)Tcl_DStringValue(dsPtr); WideCharToMultiByte(CP_UTF8, 0, string, len, p, size, NULL, NULL); + if (len == -1) --size; /* account for 0-byte at string end */ Tcl_DStringSetLength(dsPtr, size); p[size] = 0; return p; |