简单的处理swig下python的list和数组成员互转的例子。

最新推荐文章于 2021-01-13 09:13:35 发布

原创最新推荐文章于 2021-01-13 09:13:35 发布 · 1.4k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#python #list #null #input #include #struct

本文深入解析C++中类型映射技术及其在参数传递过程中的应用，详细阐述了`typemap`宏如何实现不同数据类型之间的转换，并通过实例展示了如何自定义类型映射以优化代码性能。

%module test
%{
#include "func.h"
%}
%include <typemaps.i>
/*
%typemap(in,numinputs=0) (char **buf,int *len) (char *tmp=NULL, int iLen=0) {
$1=&tmp;
$2=&iLen;
}

%typemap(argout) (char **buf,int *len) {
printf("%s %d\n",tmp$argnum,iLen$argnum);
$result=SWIG_Python_AppendOutput($result,PyString_FromStringAndSize(tmp$argnum,iLen$argnum));
//free(tmp$argnum);
}

%typemap(freearg) (char **buf,int *len) (char *tmp=NULL, int iLen=0) {
free(*$1);
}
*/
%typemap(in,numinputs=0) (char **buf,int *len) (char *tmp=NULL, int iLen=0) {
$1=&tmp;
$2=&iLen;
}

%typemap(argout,fragment="SWIG_FromCharPtrAndSize") (char **buf,int *len) {
printf("%s %d\n",tmp$argnum,iLen$argnum);
$result=SWIG_Python_AppendOutput($result,SWIG_FromCharPtrAndSize(tmp$argnum,iLen$argnum));
//free(tmp$argnum);
}
int test(char **buf,int *len);

%typemap(in) int[ANY](int temp[$1_dim0]) {
int i;
if (!PySequence_Check($input)) {
PyErr_SetString(PyExc_TypeError,"Expecting a sequence");
return NULL;
}
if (PyObject_Length($input) != $1_dim0) {
PyErr_SetString(PyExc_ValueError,"Expecting a sequence with $1_dim0 elements");
return NULL;
}
for (i =0; i < $1_dim0; i++) {
PyObject *o = PySequence_GetItem($input,i);
if (!PyInt_Check(o)) {
Py_XDECREF(o);
PyErr_SetString(PyExc_ValueError,"Expecting a sequence of floats");
return NULL;
}
temp[i] = PyInt_AsLong(o);
Py_DECREF(o);
}
$1 = &temp[0];
}

%typemap(out) int[ANY] {
int i;

PyObject *o=PyList_New($1_dim0);
for(i=0;i<$1_dim0;i++)
{
PyList_SetItem(o,i,PyInt_FromLong($1[i]));
}

$result=o;
}

typedef struct {
int x[10];
//char *names[20];
}T_Test;