Help embedding Ruby in Visual C++ project

ruby-talk
1

Hi,
I am trying to embed Ruby within a Visual C++ project, but I am having
trouble loading my script file.

How do I tell the Ruby interpreter where to look for my script file?

If I use ruby_options(), then my program hangs. So, I am trying to
pass the "-S" flag to Ruby, and I have set RUBYPATH to the directory
where "test.rb" lives.

Note: I am able to load the script if I put the script in the same
directory as my source files (which isn't the same directory as the
built C++ .exe). I do not understand why this works. Ideally, I would
like to tell the Ruby interpreter where to find my "test.rb" script.
How do I do this? Thanks in advance for your help.

Here is a code snippet:
int state;
int rargc=2;
char *rargv[2], rarg1[MAX_PATH]

strcpy(rarg1, "-S");
rargv[0] = "ruby";
rargv[1] = rarg1;

NtInitialize(&rargc, (char ***)&rargv);

ruby_init();
ruby_init_loadpath();

rb_load_protect(rb_str_new2("test.rb"), Qfalse, &state);

2

ruby_init_loadpath();

Well, ruby use the variable $LOAD_PATH to know where it must search a
library. This is this variable which is initialized when you call
rb_init_loadpath() and by default (with $SAFE == 0) it add `.', the
current directory, in it. This is why it find the script when it's in the
current directory.

You can use, ruby_incpush() if you want to add directories to this
variable.

moulon% grep ruby_incpush *.h
intern.h:void ruby_incpush _((const char*));
moulon%

Guy Decoux

3

When we want to test something in Ruby using C we have a test harness.
I've stripped out the non-relevant code to reveal this. Hope it helps

Stephen

int main(int argc, char* argv)
{
        NtInitialize(&argc, &argv);

        ruby_init();

        ruby_script("embedded");

        char *args =
        {
                "arg1",
                "arg2",
                "arg3",
                NULL
        };

        ruby_set_argv((sizeof(args) / sizeof(args[0])) - 1, args);

        char *options =
        {
                "",
                NULL
        };

        ruby_options(0, options); // required to setup TK properly

        ruby_init_loadpath();

        rb_load_file("d:\\ruby_1_8_2_15\\samples\\tk\\tkhello.rb");

        ruby_run();

        return 0;
}

ยทยทยท

In message <1132700093.526946.71730@g47g2000cwa.googlegroups.com>, stevewong4@gmail.com writes

Hi,
I am trying to embed Ruby within a Visual C++ project, but I am having
trouble loading my script file.

How do I tell the Ruby interpreter where to look for my script file?

--
Stephen Kellett
Object Media Limited http://www.objmedia.demon.co.uk/software.html
Computer Consultancy, Software Development
Windows C++, Java, Assembler, Performance Analysis, Troubleshooting