Libxml2
Jump to navigation
Jump to search
Overview
Libxml2 사용법 정리
Installation
On debian/ubuntu <source lang=bash> $ sudo apt-get install libxml2-dev </source>
On CentOS/RHEL <source lang=bash> $ sudo yum install libxml2-devel </source>
Complie options
libxml2 를 이용한 프로그램을 컴파일하기 위해서는 다음의 옵션이 컴파일 옵션에 포함되어야 한다.
complie option `xml2-config --cflags` link option `xml2-config --libs`
Error handling
xmlGetLastError
마지막에 발생한 에러 내용을 표시한다. Thread와 같이 사용할 경우, Thread 별로 발생한 마지막 에러 내용을 나타낸다.<ref>http://www.xmlsoft.org/html/libxml-xmlerror.html#xmlGetLastError</ref>
xmlErrorPtr xmlGetLastError (void) Get the last global error registered. This is per thread if compiled with thread support. Returns: NULL if no error occured or a pointer to the error
- Example<ref>https://mail.gnome.org/archives/xml/2008-November/msg00051.html</ref>
<source lang=c> void CXbrlTaxonomy::ReadInXml(const string sXml) {
xmlDocPtr pXmlDoc = xmlReadMemory(sXml.c_str(), (int)sXml.size(), "xml", NULL, 0); if (pXmlDoc == NULL) { xmlErrorPtr pErr = xmlGetLastError(); AfxMessageBox(pErr->message); } else { xmlXPathContextPtr pXPathCtx = xmlXPathNewContext(pXmlDoc); ...
</source>
Examples
원문은 이곳<ref>http://www.xmlsoft.org/examples/tree1.c</ref>에서 확인할 수 있다. <source lang=c>
- include <stdio.h>
- include <libxml/parser.h>
- include <libxml/tree.h>
- include <stdio.h>
- include <libxml/parser.h>
- include <libxml/tree.h>
- ifdef LIBXML_TREE_ENABLED
/*
*To compile this file using gcc you can type *gcc `xml2-config --cflags --libs` -o xmlexample libxml2-example.c */
/**
* print_element_names: * @a_node: the initial xml node to consider. * * Prints the names of the all the xml elements * that are siblings or children of a given xml node. */
static void print_element_names(xmlNode * a_node) {
xmlNode *cur_node = NULL;
for (cur_node = a_node; cur_node; cur_node = cur_node->next) { printf("Node type. type[%d]\n", cur_node->type); if (cur_node->type == XML_ELEMENT_NODE) { printf("node type: Element, name[%s], content[%s]\n", cur_node->name, cur_node->content); } else if(cur_node->type == XML_TEXT_NODE) { printf("text[%s]\n", cur_node->content); }
print_element_names(cur_node->children); }
}
/**
* Simple example to parse a file called "file.xml", * walk down the DOM, and print the name of the * xml elements nodes. */
int main(int argc, char **argv) {
xmlDoc *doc = NULL; xmlNode *root_element = NULL;
if (argc != 2) return(1);
/* * this initialize the library and check potential ABI mismatches * between the version it was compiled for and the actual shared * library used. */ LIBXML_TEST_VERSION
/*parse the file and get the DOM */ doc = xmlReadFile(argv[1], NULL, 0);
if (doc == NULL) { printf("error: could not parse file %s\n", argv[1]); }
/*Get the root element node */ root_element = xmlDocGetRootElement(doc);
print_element_names(root_element);
/*free the document */ xmlFreeDoc(doc);
/* *Free the global variables that may *have been allocated by the parser. */ xmlCleanupParser();
return 0;
}
- else
int main(void) {
fprintf(stderr, "Tree support not compiled in\n"); exit(1);
}
- endif
</source>
See also
- http://www.xmlsoft.org/examples/ - libxml2
References
<references />