用c的写python模块的演示

lchl0388

　　不说话,贴代码
　　uuxx/test.py    
　　________________________
　　#!/usr/bin/env python

import uuxx
for i in range(111):
    filename=uuxx.uufilename()
    print filename,len(filename)
　　________________________
　　uuxx/setup.py
　　________________________
　　#!/usr/bin/python

from distutils.core import setup, Extension
setup(
    name = "uuxx",
    version = "1.1",
    author = "zsp",
    author_email = "zsp007@gmail.com",
    url = "http://zsp.iteye.com",
    description = "uuid for more things",
    license = "GPL",
    classifiers = [
        "License :: GPL",
        "Programming Language :: C++"],
    ext_modules = [
        Extension(
            "uuxx",
            ["uuxx.cpp"],
            include_dirs = ["/usr/include/"],
            libraries = ["uuid","util"]
        )
    ]
    )
　　________________________
　　
uuxx.cpp
________________________
　　extern"C"{
#include <uuid/uuid.h>
#include <Python.h>
}

void   base64_encode(const   void*   pdata,const   unsigned   long   data_size,   void*   out_pcode)
{
staticconstunsignedcharbase64char[]   =   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_!";

if   (data_size <=0)   return;

constunsignedchar*   pS   =   (const  unsignedchar*)pdata;
constunsignedchar*   pSEnd   =   &pS[data_size];
unsignedchar* pD   =(unsignedchar*)out_pcode;

for(;pS <pSEnd-2;pS+=3,pD+=4)
{
pD[0]   =   base64char[pS[0]>> 2];
pD[1]   =   base64char[0x3F   &   (pS[0] <<4   |   pS[1]>> 4)];
pD[2]   =   base64char[0x3F   &   (pS[1] <<2   |   pS[2]>> 6)];
pD[3]   =   base64char[0x3F   &   pS[2]];
}

//static const unsigned char BASE64_PADDING='=';
switch   (pSEnd-pS)
{
case   1:
pD[0]=base64char[pS[0]>> 2];
pD[1]=base64char[0x3F   &   (pS[0] <<4)];
//pD[2]   =  BASE64_PADDING;
//pD[3]   =  BASE64_PADDING ;
break;
case   2:
pD[0]=base64char[pS[0]>> 2];
pD[1]=base64char[0x3F   &   (pS[0] <<4   |   pS[1]>> 4)];
pD[2]=base64char[0x3F   &   (pS[1] <<2)];
//pD[3]   =  BASE64_PADDING ;
break;
}
};
PyObject * uufilename(PyObject * args,PyObject *kwds){
    uuid_t uu;
    uuid_generate( uu );

    //用的改造过的base64的编码+改造的uuid

    staticconstunsigneddata_size=16;
    staticconstintb64_length = (data_size+2)/3*4-2;
 
    charb64uu[data_size];

    base64_encode(uu,data_size,b64uu);
    PyObject *value = PyString_FromStringAndSize(b64uu,b64_length);
    returnvalue;
};
PyDoc_STRVAR(uufilename__doc__,
    "uufilename"
);
staticPyMethodDef uuxx_methods[] = {
  {
    "uufilename",
    uufilename,
    METH_VARARGS,
    uufilename__doc__
},
{NULL, NULL, 0, NULL}

};

PyMODINIT_FUNC inituuxx(){
  Py_InitModule("uuxx", uuxx_methods);
}