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Add support for wchar_t * and std::wstring Unicode strings on Linux

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Initial contributions for Linux provided in issue #1233, modified to work
on both Windows and Linux. Dual support is possible by detecting
the sizeof wchar_t which is different on each of these systems.
This commit is contained in:
William S Fulton 2022-04-29 18:13:21 +01:00
commit ed42422d1c
8 changed files with 327 additions and 46 deletions
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40
Lib/csharp/std_wstring.i
View file

@ -15,6 +15,28 @@
#include <string>
%}
%fragment("Swig_csharp_UTF16ToWString", "header") %{
/* For converting from .NET UTF16 (2 byte unicode) strings. wchar_t is 2 bytes on Windows, 4 bytes on Linux. */
static std::wstring Swig_csharp_UTF16ToWString(const wchar_t *str) {
if (sizeof(wchar_t) == 2) {
return std::wstring(str);
} else {
const unsigned short *pBegin((const unsigned short *)(str));
const unsigned short *ptr(pBegin);
while (*ptr != 0)
++ptr;
std::wstring result;
result.reserve(ptr - pBegin);
while(pBegin != ptr)
result.push_back(*pBegin++);
return result;
}
}
%}
namespace std {
%naturalvar wstring;
@ -31,22 +53,22 @@ class wstring;
%typemap(csdirectorin) wstring "$iminput"
%typemap(csdirectorout) wstring "$cscall"
%typemap(in, canthrow=1) wstring
%typemap(in, canthrow=1, fragment="Swig_csharp_UTF16ToWString") wstring
%{ if (!$input) {
SWIG_CSharpSetPendingExceptionArgument(SWIG_CSharpArgumentNullException, "null wstring", 0);
return $null;
}
$1.assign($input); %}
%typemap(out) wstring %{ $result = SWIG_csharp_wstring_callback($1.c_str()); %}
$1 = Swig_csharp_UTF16ToWString($input); %}
%typemap(out) wstring %{ $result = SWIG_csharp_wstring_with_length_callback($1.c_str(), (int)$1.size()); %}
%typemap(directorout, canthrow=1) wstring
%typemap(directorout, canthrow=1) wstring
%{ if (!$input) {
SWIG_CSharpSetPendingExceptionArgument(SWIG_CSharpArgumentNullException, "null wstring", 0);
return $null;
}
$result.assign($input); %}
%typemap(directorin) wstring %{ $input = SWIG_csharp_wstring_callback($1.c_str()); %}
%typemap(directorin) wstring %{ $input = SWIG_csharp_wstring_with_length_callback($1.c_str(), (int)$1.size()); %}
%typemap(csin) wstring "$csinput"
%typemap(csout, excode=SWIGEXCODE) wstring {
@ -72,14 +94,14 @@ class wstring;
%typemap(csdirectorin) const wstring & "$iminput"
%typemap(csdirectorout) const wstring & "$cscall"
%typemap(in, canthrow=1) const wstring &
%typemap(in, canthrow=1, fragment="Swig_csharp_UTF16ToWString") const wstring &
%{ if (!$input) {
SWIG_CSharpSetPendingExceptionArgument(SWIG_CSharpArgumentNullException, "null wstring", 0);
return $null;
}
std::wstring $1_str($input);
std::wstring $1_str(Swig_csharp_UTF16ToWString($input));
$1 = &$1_str; %}
%typemap(out) const wstring & %{ $result = SWIG_csharp_wstring_callback($1->c_str()); %}
%typemap(out) const wstring & %{ $result = SWIG_csharp_wstring_with_length_callback($1->c_str(), (int)$1->size()); %}
%typemap(csin) const wstring & "$csinput"
%typemap(csout, excode=SWIGEXCODE) const wstring & {
@ -97,7 +119,7 @@ class wstring;
$1_str = $input;
$result = &$1_str; %}
%typemap(directorin) const wstring & %{ $input = SWIG_csharp_wstring_callback($1.c_str()); %}
%typemap(directorin) const wstring & %{ $input = SWIG_csharp_wstring_with_length_callback($1.c_str(), (int)$1->size()); %}
%typemap(csvarin, excode=SWIGEXCODE2) const wstring & %{
set {