Swig: how to convert char* to Array?

I have a C++ library that I’m trying to access in Ruby. One of the C++
functions returns a char* and I would like this to be converted to an
Array
(since the char* may have 0x00 in it, which terminate a Ruby string
prematurely). I’m trying to write a typemap for the conversion, but I’m
getting stuck on determining the length of the array – I can’t pass
that as
a parameter, since this is an out typemap. So my question is, does
anyone
have a way to convert char* to Array in Swig, hopefully with an example?
Thanks!

Adam

On Monday 21 January 2008 19:58:44 Adam B. wrote:

I have a C++ library that I’m trying to access in Ruby. One of the C++
functions returns a char* and I would like this to be converted to an Array
(since the char* may have 0x00 in it, which terminate a Ruby string
prematurely). I’m trying to write a typemap for the conversion, but I’m
getting stuck on determining the length of the array – I can’t pass that
as a parameter, since this is an out typemap. So my question is, does
anyone have a way to convert char* to Array in Swig, hopefully with an
example? Thanks!

Ruby strings are not null-terminated, so they may contain 0x00 as well
as any
other char. Of course when converting from C char* you have to specify
the
length:

VALUE rubystring;
char str[] = {‘a’,‘b’,0x00,‘c’};

rubystring = rb_str_new(str,4);

Jan

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