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Add support for throwing wstring exceptions

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Throw an ApplicationException for std::wstring and wchar_t * strings
This commit is contained in:
William S Fulton 2022-04-27 18:41:24 +01:00
commit 79a9389355
4 changed files with 106 additions and 7 deletions
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71
Lib/csharp/wchar.i
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@ -39,7 +39,7 @@ static void * SWIG_csharp_wstring_callback(const wchar_t *s) {
[global::System.Runtime.InteropServices.DllImport("$dllimport", EntryPoint="SWIGRegisterWStringCallback_$module")]
public static extern void SWIGRegisterWStringCallback_$module(SWIGWStringDelegate wstringUTF16Delegate, SWIGWStringDelegate wstringUTF32Delegate);
static string CreateWStringFromUTF16([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
public static string CreateWStringFromUTF16([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
return global::System.Runtime.InteropServices.Marshal.PtrToStringUni(cString, length);
}
@ -72,6 +72,71 @@ SWIGEXPORT void SWIGSTDCALL SWIGRegisterWStringCallback_$module(SWIG_CSharpWStri
#endif // SWIG_CSHARP_WSTRING_HELPER_
#endif // SWIG_CSHARP_NO_WSTRING_HELPER
#if !defined(SWIG_CSHARP_NO_WSTRING_EXCEPTION_HELPER)
#if !defined(SWIG_CSHARP_WSTRING_EXCEPTION_HELPER_)
#define SWIG_CSHARP_WSTRING_EXCEPTION_HELPER_
%insert(runtime) %{
/* Callback for returning strings to C# without leaking memory */
typedef void (SWIGSTDCALL* SWIG_CSharpWStringExceptionHelperCallback)(const wchar_t *, int length);
static SWIG_CSharpWStringExceptionHelperCallback SWIG_csharp_ApplicationException_callback = NULL;
%}
%pragma(csharp) imclasscode=%{
protected class SWIGWStringExceptionHelper {
[return: global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]
public delegate void SWIGWStringExceptionDelegate(global::System.IntPtr message, int length);
static SWIGWStringExceptionDelegate applicationExceptionUTF16Delegate = new SWIGWStringExceptionDelegate(SetPendingApplicationExceptionUTF16);
static SWIGWStringExceptionDelegate applicationExceptionUTF32Delegate = new SWIGWStringExceptionDelegate(SetPendingApplicationExceptionUTF32);
[global::System.Runtime.InteropServices.DllImport("$dllimport", EntryPoint="SWIGRegisterWStringExceptionCallback_$module")]
public static extern void SWIGRegisterWStringExceptionCallback_$module(SWIGWStringExceptionDelegate applicationExceptionUTF16Delegate, SWIGWStringExceptionDelegate applicationExceptionUTF32Delegate);
static string CreateWStringFromUTF16([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
return global::System.Runtime.InteropServices.Marshal.PtrToStringUni(cString, length);
}
public static string CreateWStringFromUTF32([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
if (length == 0)
return string.Empty;
byte[] buffer = new byte[length * 4];
global::System.Runtime.InteropServices.Marshal.Copy(cString, buffer, 0, buffer.Length);
byte[] utf8buffer = global::System.Text.Encoding.Convert(global::System.Text.Encoding.UTF32, global::System.Text.Encoding.UTF8, buffer);
return global::System.Text.Encoding.Default.GetString(utf8buffer);
}
static void SetPendingApplicationExceptionUTF16([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
string message = SWIGWStringHelper.CreateWStringFromUTF16(cString, length);
SWIGPendingException.Set(new global::System.ApplicationException(message, SWIGPendingException.Retrieve()));
}
static void SetPendingApplicationExceptionUTF32([global::System.Runtime.InteropServices.MarshalAs(global::System.Runtime.InteropServices.UnmanagedType.LPWStr)]global::System.IntPtr cString, int length) {
string message = SWIGWStringHelper.CreateWStringFromUTF32(cString, length);
SWIGPendingException.Set(new global::System.ApplicationException(message, SWIGPendingException.Retrieve()));
}
static SWIGWStringExceptionHelper() {
SWIGRegisterWStringExceptionCallback_$module(applicationExceptionUTF16Delegate, applicationExceptionUTF32Delegate);
}
}
static protected SWIGWStringExceptionHelper swigWStringExceptionHelper = new SWIGWStringExceptionHelper();
%}
%insert(runtime) %{
#ifdef __cplusplus
extern "C"
#endif
SWIGEXPORT void SWIGSTDCALL SWIGRegisterWStringExceptionCallback_$module(SWIG_CSharpWStringExceptionHelperCallback callback_utf16, SWIG_CSharpWStringExceptionHelperCallback callback_utf32) {
SWIG_csharp_ApplicationException_callback = sizeof(wchar_t) == 2 ? callback_utf16 : callback_utf32;
}
%}
#endif // SWIG_CSHARP_WSTRING_EXCEPTION_HELPER_
#endif // SWIG_CSHARP_NO_WSTRING_EXCEPTION_HELPER
// wchar_t
%typemap(ctype) wchar_t "wchar_t"
@ -175,6 +240,10 @@ static void Swig_csharp_UTF16ToWCharPtrFree(wchar_t *str) {
%typemap(typecheck) wchar_t * = char *;
%typemap(throws, canthrow=1, fragment="<wchar.h>") wchar_t *
%{ SWIG_csharp_ApplicationException_callback($1, (int)wcslen($1));
return $null; %}
/* Default typemap for handling wchar_t * members (based on char * in swig.swg) */