如何通过引用Scilab函数传递变量 [英] How pass variables by reference to a Scilab function

问题描述

我想拥有一个Scilab函数，该函数能够更改其输入变量，例如在C中我可以拥有

I want to have a Scilab function which is able to alter its input variables, For example in C I could have

void double(int* x){
    *x *= 2;
    return;
}

在Scilab中有intppty，funptr，addinter，istk，sadr和stk似乎是相关的，但是我找不到任何有效的示例. Scilab确实具有pointer类型(即128).如果您能帮助我解决这个问题，我将不胜感激.

There are intppty, funptr, addinter, istk, sadr and stk in Scilab which seem to be relevant, however I can't find any working example. Scilab does have a pointer type (i.e. 128). I would appreciate if you could help me figure this out.

PS1.我还镜像了这个问题

P.S.1. I have also mirrored this question here on Reddit.

PS2. Scilab还具有可以连接C/的intersci，SWIG，fort，external，call，API_Scilab/gateway. C++函数或Fortran子例程.不幸的是，不推荐使用intersci，而SWIG似乎仅适用于C++兼容性有限的Linux.

P.S.2. Scilab also have intersci, SWIG, fort, external, call, API_Scilab/gateway which can interface C/C++ functions or Fortran subroutines. Unfortunately intersci has been deprecated and SWIG seems to be only for Linux with limited C++ compatibility.

PS3. scilab具有功能重载，它可以处理deff定义的功能以及%，<...>，_...语法的组合.

P.S.3. scilab has function overloading which can do stuff with the functions defined by deff and a combination of %,<...>,_... syntax.

PS4 .API_Scilab/gateway的工作方式基本上是使用头文件api_scilab.h提供的功能来扩展代码，并使用ilib_build进行编译，然后编写loader*.sce脚本，然后使用exec加载它.

P.S.4. The way API_Scilab/gateway works, is basically you dvelop the code using functionalities provided bu the header file api_scilab.h, compile it with ilib_build, write a loader*.sce script and then load it with exec.

P.S.5..应该可以使用

atomsInstall('mingw'); atomsLoad('mingw');

但是，正如我所解释的

However I am not able to get it to work as I have explained here.

推荐答案

这可以通过使用例如C ++ Scilab 6网关(示例需要计算机上的编译器，对于Linux和OSX用户来说应该不是问题):

This is possible by using, e.g. a C++ Scilab 6 gateway (example needs a compiler on the machine, it should not be a problem for Linux and OSX users):

gw=[
"#include ""double.hxx"""
"#include ""function.hxx"""
"types::Function::ReturnValue sci_incr(types::typed_list &in, int _iRetCount,"
"                                      types::typed_list &out)"
"{"    
"    if (in.size() != 1 || in[0]->isDouble() == false) {"
"        throw ast::InternalError(""Wrong type/number of input argument(s)"");"
"    }"
"    types::Double *pDbl = in[0]->getAs<types::Double>();"
"    double *pdbl = pDbl->get();"
""    
"    for (int i=0; i < pDbl->getSize(); i++) (*pdbl) += 1.0;"
""
"    return types::Function::OK;"
"}"];
cd TMPDIR;
mputl(gw,TMPDIR+"/sci_incr.cpp");
ulink
ilib_build("incr", ["incr" "sci_incr" "cppsci"],"sci_incr.cpp", [])
exec loader.sce

在编译/链接接口后，您可以具有以下行为:

After compilation/link of the interface, you can have the following behavior:

--> x=1
 x  = 

   1.

--> incr(x)

--> x
 x  = 

   2.

但是，不要将其视为功能，因为Scilab语言并非旨在使用它！

However, don't consider this as a feature, because the Scilab language has not been designed to use it !

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