using libxml2连载(1 中文支持)

    LibXML2自身已经支持了中文编码.只是他的所有api处理的数据都是UTF-8类型的，所以只要在读入和写入数据时进行相应转换即可！代码1是使用linux下C API进行编码转换；代码2因为libxml2已融合了iconv，使用了libxml2的函数来进行编码转换.

/*

compile:  gcc -I/usr/include/libxml2/ -lxml2 iconv.c

input:

    test.xml

<?xml version="1.0" encoding="gb2312"?>

<parent>测试</parent>

output:

    测试

1)     iconv

#include <libxml/xmlmemory.h>

#include <libxml/parser.h>

#include <arpa/inet.h>

#include <iconv.h>

 

char * Convert( char *encFrom, char *encTo, const char * in)

{

 

    static char bufin[1024], bufout[1024], *sin, *sout;

    int mode, lenin, lenout, ret, nline;

    iconv_t c_pt;

 

    if ((c_pt = iconv_open(encTo, encFrom)) == (iconv_t)-1)

    {

       printf("iconv_open false: %s ==> %s/n", encFrom, encTo);

       return NULL;

    }

    iconv(c_pt, NULL, NULL, NULL, NULL);

 

    lenin = strlen(in) + 1;

    lenout = 1024;

    sin    = (char *)in;

    sout   = bufout;

    ret = iconv(c_pt, &sin, (size_t *)&lenin, &sout, (size_t *)&lenout);

          

    if (ret == -1)

    {

       return NULL;

    }

 

    iconv_close(c_pt);

    return bufout;

}

 

int main(void)

{

        xmlDocPtr doc = NULL;

        xmlNodePtr cur = NULL;

 

        doc = xmlParseFile("test.xml");

        cur = xmlDocGetRootElement(doc);

        printf("%s/n", (char *)xmlNodeGetContent(cur));

        //printf("%s/n", Convert("utf-8", "gb2312", (char *)xmlNodeGetContent(cur)));

}

 

2)       xmlFindCharEncodingHandler

使用数据类型：xmlCharEncodingHandlerPtr

/*******************************************

 * compile: gcc -I/usr/include/libxml2/ -lxml2 convert.c

 * usage: convert utf-8 string or null

 * input: ./convert 测试

 * output:

[wuqifu@localhost test]$ ./convert 测试

ISO-8859-1:虏芒脢脭

<?xml version="1.0" encoding="ISO-8859-1"?>

<root>测试</root>

*******************************************/

#include <libxml/encoding.h>

/**

 * function name: ConvertInput

 * input:

   @in: string in a given encoding

   @encoding: the encoding used

* description: Converts @in into UTF-8 for processing with libxml2 APIs

* return: returns the converted UTF-8 string, or NULL in case of error.

**/

unsigned char* ConvertInput(const char *in, const char *encoding)

{

    unsigned char *out;

    int ret;

    int size;

    int out_size;

    int temp;

    xmlCharEncodingHandlerPtr handler;

 

    if (in == 0)

        return 0;

 

    handler = xmlFindCharEncodingHandler(encoding);

 

    if (!handler) {

        printf("ConvertInput: no encoding handler found for '%s'/n",

               encoding ? encoding : "");

        return 0;

    }

 

    size = (int) strlen(in) + 1;

    out_size = size * 2 - 1;

    out = (unsigned char *) xmlMalloc((size_t) out_size);

 

    if (out != 0) {

        temp = size - 1;

        ret = handler->input(out, &out_size, (const unsigned char *) in, &temp);

        if ((ret < 0) || (temp - size + 1)) {

            if (ret < 0) {

                printf("ConvertInput: conversion wasn't successful./n");

            } else {

                printf

                    ("ConvertInput: conversion wasn't successful. converted: %i octets./n",

                     temp);

            }

 

            xmlFree(out);

            out = 0;

        } else {

            out = (unsigned char *) xmlRealloc(out, out_size + 1);

            out[out_size] = 0; /*null terminating out */

        }

    } else {

        printf("ConvertInput: no mem/n");

    }

 

    return out;

}

 

int    main(int argc, char **argv)

{

       unsigned char *content, *out;

       xmlDocPtr doc;

       xmlNodePtr rootnode;

       char *encoding = "ISO-8859-1";   //utf-8, ISO-8859-1

       if (argc <= 1) {

              printf("Usage: %s content/n", argv[0]);

              return(0);

       }

       content = argv[1];

 

       out = ConvertInput(content, encoding);

       printf( "%s:%s/n", encoding, out );

       doc = xmlNewDoc ("1.0");

       rootnode = xmlNewDocNode(doc, NULL, (const xmlChar*)"root", out);

       xmlDocSetRootElement(doc, rootnode);

       xmlSaveFormatFileEnc("-", doc, encoding, 1);

       return (1);

}