Re: C interpreters
Thanks, it's decent, seems to not act like a full shell though. If I ctrl-z while in emacs, it drops me out of CH as well as emacs. still, it's a nice play toy. thanks, -Jim Stapleton On Jan 31, 2008 9:54 PM, Gary Kline [EMAIL PROTECTED] wrote: On Thu, Jan 31, 2008 at 10:12:35AM -0500, Jim Stapleton wrote: Thanks, and that'll make shared (.so) libraries just fine? Well, that was certainly a relief. That very much describes the C interface I made already. I'm working on a alternate ports listing system, and I wanted to use something that I didn't mind programming in /and/ I knew should be available on any FreeBSD system without requireing more port installs, so I went with C or C++. I want it to be easy to write back-end database modules, in case people don't want to use the two that I write (SQLite2 and a my own flat-file system). There are only three functions that need wrapped: open, query, close. Open returns that void* pointer, query and close take it as the first argument. Any ideas on the C interpreter? It's been a while since I've done a lot of C/C++. hi jim, the bestt one i know of is free, named ch. cost only $25 for the whole deal. used mostly by the hardware sectoor so far. i'd like to see it be adopted by the open ource folks too.i haven't used it much so far becuse my C progras are mostly for myself and 1000 lines. v. small company, forget the name. gary Thanks, -Jim Stapleton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- Gary Kline [EMAIL PROTECTED] www.thought.org Public Service Unix http://jottings.thought.org http://transfinite.thought.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
C interpreters
Does anyone have a recommendation on C interpreters? I want to do some development in C, but I would also like to have the ability of playing with an interactive command line a-la python, as it eases the playing process of figuring out what I am doing. There are a few options in the ports tree and I'm wondering if anyone has played with them and has an oppinion. I've seen ccscrpt and cint, I also know root has a C interpereter (though I don't know how good it is, and it's for scientific numerical analysis, not generic programming). as a secondary (probably stupid) question: how hard is it to write a library in C++ and allow C programs to use it? Thanks, -Jim Stapleton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: C interpreters
Am Donnerstag, 31. Januar 2008 14:48:15 schrieb Jim Stapleton:
as a secondary (probably stupid) question: how hard is it to write a
library in C++ and allow C programs to use it?
To write a library in C++ to which C programs have access, you'll have to
write a set of wrapper functions for every method of a class you want to
expose to C which basically get an object pointer as the first parameter and
the actual method arguments as the rest. For example:
test.cc
---
#include test.hh
#include test.h
Test::Test()
{
}
int Test::something(int data)
{
return 0;
}
extern C {
TestObject NewTest() {
return new Test();
}
int TestSomething(TestObject ob, int data) {
return reinterpret_castTest*(ob)-something(data);
}
}
test.hh
---
#ifndef TEST_HH
#define TEST_HH
class Test
{
Test();
int something(int data);
};
#endif // TEST_HH
test.h
--
#ifndef TEST_H
#define TEST_H
typedef void* TestObject;
#ifdef __cplusplus
extern C {
#endif /* __cplusplus */
TestObject NewTest();
int TestSomething(TestObject ob, int data);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* TEST_H */
test.c
--
#include test.h
int main(int argc, char** argv)
{
TestObject testob;
testob = NewTest();
TestSomething(testob,1);
}
This lets you use the compiled test.cc (for example, as a library, to get
around the problem of having to link your C-program against libstdc++)
together with a C program.
Be aware of the fact that C doesn't know function overloading, so you'll
basically have to implement that by defining different methods for every type
of overloaded function you want to accept.
Depending on how large the C++ framework is which you're trying to wrap (and
in how much it uses advanced C++ features), this is an easy (i.e.,
repetitive) or a hard/close to impossible task, especially when it comes to
templates.
YMMV.
--
Heiko Wundram
Product Application Development
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Re: C interpreters
Thanks, and that'll make shared (.so) libraries just fine? Well, that was certainly a relief. That very much describes the C interface I made already. I'm working on a alternate ports listing system, and I wanted to use something that I didn't mind programming in /and/ I knew should be available on any FreeBSD system without requireing more port installs, so I went with C or C++. I want it to be easy to write back-end database modules, in case people don't want to use the two that I write (SQLite2 and a my own flat-file system). There are only three functions that need wrapped: open, query, close. Open returns that void* pointer, query and close take it as the first argument. Any ideas on the C interpreter? It's been a while since I've done a lot of C/C++. Thanks, -Jim Stapleton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: C interpreters
On Thu, Jan 31, 2008 at 10:12:35AM -0500, Jim Stapleton wrote: Thanks, and that'll make shared (.so) libraries just fine? Well, that was certainly a relief. That very much describes the C interface I made already. I'm working on a alternate ports listing system, and I wanted to use something that I didn't mind programming in /and/ I knew should be available on any FreeBSD system without requireing more port installs, so I went with C or C++. I want it to be easy to write back-end database modules, in case people don't want to use the two that I write (SQLite2 and a my own flat-file system). There are only three functions that need wrapped: open, query, close. Open returns that void* pointer, query and close take it as the first argument. Any ideas on the C interpreter? It's been a while since I've done a lot of C/C++. hi jim, the bestt one i know of is free, named ch. cost only $25 for the whole deal. used mostly by the hardware sectoor so far. i'd like to see it be adopted by the open ource folks too.i haven't used it much so far becuse my C progras are mostly for myself and 1000 lines. v. small company, forget the name. gary Thanks, -Jim Stapleton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- Gary Kline [EMAIL PROTECTED] www.thought.org Public Service Unix http://jottings.thought.org http://transfinite.thought.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
