libxml2-2.7.7/doc/tutorial/aph.html

<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>H. Code for Encoding Conversion Example</title><meta name="generator" content="DocBook XSL Stylesheets V1.61.2"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="up" href="index.html" title="Libxml Tutorial"><link rel="previous" href="apg.html" title="G. Code for Retrieving Attribute Value Example"><link rel="next" href="api.html" title="I. Acknowledgements"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">H. Code for Encoding Conversion Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apg.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="api.html">Next</a></td></tr></table><hr></div><div class="appendix" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="convertappendix"></a>H. Code for Encoding Conversion Example</h2></div></div><div></div></div><p>
      </p><pre class="programlisting">
#include &lt;string.h&gt;
#include &lt;libxml/parser.h&gt;


unsigned char*
convert (unsigned char *in, char *encoding)
{
	unsigned char *out;
        int ret,size,out_size,temp;
        xmlCharEncodingHandlerPtr handler;

        size = (int)strlen(in)+1; 
        out_size = size*2-1; 
        out = malloc((size_t)out_size); 

        if (out) {
                handler = xmlFindCharEncodingHandler(encoding);
                
                if (!handler) {
                        free(out);
                        out = NULL;
                }
        }
        if (out) {
                temp=size-1;
                ret = handler-&gt;input(out, &amp;out_size, in, &amp;temp);
                if (ret || temp-size+1) {
                        if (ret) {
                                printf("conversion wasn't successful.\n");
                        } else {
                                printf("conversion wasn't successful. converted: %i octets.\n",temp);
                        }
                        free(out);
                        out = NULL;
                } else {
                        out = realloc(out,out_size+1); 
                        out[out_size]=0; /*null terminating out*/
                        
                }
        } else {
                printf("no mem\n");
        }
        return (out);
}	


int
main(int argc, char **argv) {

	unsigned char *content, *out;
	xmlDocPtr doc;
	xmlNodePtr rootnode;
	char *encoding = "ISO-8859-1";
	
		
	if (argc &lt;= 1) {
		printf("Usage: %s content\n", argv[0]);
		return(0);
	}

	content = argv[1];

	out = convert(content, encoding);

	doc = xmlNewDoc ("1.0");
	rootnode = xmlNewDocNode(doc, NULL, (const xmlChar*)"root", out);
	xmlDocSetRootElement(doc, rootnode);

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

</pre><p>
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