开源跨平台XML解析器-LIBXML2--C源代码及VC6工程文件资源-CSDN文库

共2000个文件

xml：830个

err：505个

html：233个

XML

LIBXML2

5星 · 超过95%的资源需积分: 9 172 浏览量 2011-09-15 18:21:05 上传评论收藏 2.79MB 7Z 举报

资源推荐

资源详情

资源评论

收起资源包目录

开源跨平台XML解析器-LIBXML2--C源代码及VC6工程文件（2000个子文件）

xmllint.1 11KB

xmlcatalog.1 6KB

xml2-config.1 1KB

libxml.3 2KB

302836_0 0B

302836_err 37B

302836_valid 0B

307377_0 0B

307377_1 0B

307377_2 0B

307377_err 37B

307377_valid 0B

492317_0 0B

492317_1 0B

492317_2 0B

492317_err 37B

492317_valid 0B

558452_0 0B

558452_1 0B

558452_2 0B

558452_3 0B

558452_4 0B

558452_err 37B

558452_valid 0B

570702_0_0 39B

579746_0_0 39B

579746_0_1 39B

579746_0_2 39B

579746_0_3 47B

579746_0_4 39B

579746_0_5 47B

579746_1_0 39B

579746_1_1 39B

579746_1_2 39B

579746_1_3 47B

579746_1_4 39B

579746_1_5 47B

582887_0_0 39B

582906-1_0_0 41B

582906-2_0_0 0B

595792-ext_err 41B

595792-ext_valid 0B

595792_0 0B

595792_err 37B

595792_valid 0B

a 75B

a 44B

aba 123B

aba 66B

abaa 215B

abaa 55B

abba 199B

abba 44B

addressBook_err 42B

addressBook_valid 0B

all1_0_0 37B

all_0_0 36B

all_0_1 36B

all_0_2 36B

all_0_3 44B

all_0_4 44B

all_0_5 44B

all_0_6 44B

all_0_7 44B

all_1_0 36B

all_1_1 36B

all_1_2 36B

all_1_3 44B

all_1_4 36B

all_1_5 44B

all_1_6 44B

all_1_7 44B

all_2_0 44B

all_2_1 44B

all_2_2 44B

all_2_3 36B

all_2_4 44B

all_2_5 44B

all_2_6 36B

all_2_7 36B

allsg_0_0 38B

allsg_0_1 38B

allsg_0_2 38B

allsg_0_3 46B

allsg_0_4 46B

allsg_0_5 46B

Makefile.am 57KB

Makefile.am 5KB

Makefile.am 2KB

Makefile.am 1KB

Makefile.am 902B

Makefile.am 410B

Makefile.am 121B

annot-err_0_0 0B

any1_0_0 37B

any2_0_0 37B

any3_0_0 45B

共 2000 条

Libxml Tutorial

John Fleck <jfleck@inkstain.net>

Revision History

Revision 1 June 4, 2002

Initial draft

Revision 2 June 12, 2002

retrieving attribute value added

Revision 3 Aug. 31, 2002

freeing memory fix

Revision 4 Nov. 10, 2002

encoding discussion added

Revision 5 Dec. 15, 2002

more memory freeing changes

Revision 6 Jan. 26. 2003

add index

Revision 7 April 25, 2003

add compilation appendix

Revision 8 July 24, 2003

add XPath example

Revision 9 Feb. 14, 2004

Fix bug in XPath example

Revision 7 Aug. 24, 2004

Fix another bug in XPath example

Table of Contents

Introduction ...............................................................................2

Data Types ................................................................................2

Parsing the file ...........................................................................3

Retrieving Element Content .......................................................... 3

Using XPath to Retrieve Element Content ........................................ 4

Writing element content ............................................................... 6

Writing Attribute ........................................................................6

Retrieving Attributes ...................................................................7

Encoding Conversion ...................................................................8

A. Compilation ...........................................................................9

B. Sample Document ...................................................................9

C. Code for Keyword Example ......................................................9

D. Code for XPath Example ........................................................ 10

E. Code for Add Keyword Example .............................................. 12

F. Code for Add Attribute Example .............................................. 13

G. Code for Retrieving Attribute Value Example ............................. 14

H. Code for Encoding Conversion Example ................................... 15

I. Acknowledgements ................................................................ 16

Abstract

Libxml is a freely licensed C language library for handling XML, portable

across a large number of platforms. This tutorial provides examples of its basic

functions.

Introduction

Libxml is a C language library implementing functions for reading, creating and

manipulating XML data. This tutorial provides example code and explanations

of its basic functionality.

Libxml and more details about its use are available on the project home page.

Included there is complete API documentation. This tutorial is not meant to sub-

stitute for that complete documentation, but to illustrate the functions needed to

use the library to perform basic operations.

The tutorial is based on a simple XML application I use for articles I write. The

format includes metadata and the body of the article.

The example code in this tutorial demonstrates how to:

• Parse the document.

• Extract the text within a specified element.

• Add an element and its content.

• Add an attribute.

• Extract the value of an attribute.

Full code for the examples is included in the appendices.

Data Types

Libxml declares a number of data types we will encounter repeatedly, hiding the

messy stuff so you do not have to deal with it unless you have some specific

need.

xmlChar A basic replacement for char, a byte in a UTF-8

encoded string. If your data uses another encod-

ing, it must be converted to UTF-8 for use with

libxml's functions. More information on encoding

is available on the libxml encoding support web

page.

xmlDoc A structure containing the tree created by a parsed

doc. xmlDocPtr is a pointer to the structure.

xmlNodePtr and xml-

Node

A structure containing a single node. xmlNodePtr

is a pointer to the structure, and is used in travers-

ing the document tree.

Libxml Tutorial

Parsing the file

Parsing the file requires only the name of the file and a single function call, plus

error checking. Full code: Appendix C, Code for Keyword Example

❶ xmlDocPtr doc;

❷ xmlNodePtr cur;

❸ doc = xmlParseFile(docname);

❹ if (doc == NULL ) {

fprintf(stderr,"Document not parsed successfully. \n");

return;

}

❺ cur = xmlDocGetRootElement(doc);

❻ if (cur == NULL) {

fprintf(stderr,"empty document\n");

xmlFreeDoc(doc);

return;

}

❼ if (xmlStrcmp(cur->name, (const xmlChar *) "story")) {

fprintf(stderr,"document of the wrong type, root node != story");

xmlFreeDoc(doc);

return;

}

❶ Declare the pointer that will point to your parsed document.

❷ Declare a node pointer (you'll need this in order to interact with individual

nodes).

❹ Check to see that the document was successfully parsed. If it was not,

libxml will at this point register an error and stop.

Note

One common example of an error at this point is improper handling of

encoding. The XML standard requires documents stored with an encod-

ing other than UTF-8 or UTF-16 to contain an explicit declaration of

their encoding. If the declaration is there, libxml will automatically per-

form the necessary conversion to UTF-8 for you. More information on

XML's encoding requirements is contained in the standard.

❺ Retrieve the document's root element.

❻ Check to make sure the document actually contains something.

❼ In our case, we need to make sure the document is the right type. "story" is

the root type of the documents used in this tutorial.

Retrieving Element Content

Retrieving the content of an element involves traversing the document tree until

you find what you are looking for. In this case, we are looking for an element

called "keyword" contained within element called "story". The process to find

the node we are interested in involves tediously walking the tree. We assume

Libxml Tutorial

you already have an xmlDocPtr called doc and an xmlNodPtr called cur.

❶cur = cur->xmlChildrenNode;

❷while (cur != NULL) {

if ((!xmlStrcmp(cur->name, (const xmlChar *)"storyinfo"))){

parseStory (doc, cur);

}

cur = cur->next;

}

❶ Get the first child node of cur. At this point, cur points at the document

root, which is the element "story".

❷ This loop iterates through the elements that are children of "story", looking

for one called "storyinfo". That is the element that will contain the

"keywords" we are looking for. It uses the libxml string comparison func-

tion, xmlStrcmp. If there is a match, it calls the function parseStory.

void

parseStory (xmlDocPtr doc, xmlNodePtr cur) {

xmlChar *key;

❶ cur = cur->xmlChildrenNode;

❷ while (cur != NULL) {

if ((!xmlStrcmp(cur->name, (const xmlChar *)"keyword"))) {

❸ key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);

printf("keyword: %s\n", key);

xmlFree(key);

}

cur = cur->next;

}

return;

}

❶ Again we get the first child node.

❷ Like the loop above, we then iterate through the nodes, looking for one that

matches the element we're interested in, in this case "keyword".

❸ When we find the "keyword" element, we need to print its contents. Re-

member that in XML, the text contained within an element is a child node

of that element, so we turn to cur->xmlChildrenNode. To retrieve it,

we use the function xmlNodeListGetString, which also takes the

doc pointer as an argument. In this case, we just print it out.

Note

Because xmlNodeListGetString allocates memory for the string

it returns, you must use xmlFree to free it.

Using XPath to Retrieve Element

Content

In addition to walking the document tree to find an element, Libxml2 includes

Libxml Tutorial

support for use of XPath expressions to retrieve sets of nodes that match a spe-

cified criteria. Full documentation of the XPath API is here.

XPath allows searching through a document for nodes that match specified cri-

teria. In the example below we search through a document for the contents of all

keyword elements.

Note

A full discussion of XPath is beyond the scope of this document. For

details on its use, see the XPath specification.

Full code for this example is at Appendix D, Code for XPath Example.

Using XPath requires setting up an xmlXPathContext and then supplying the

XPath expression and the context to the xmlXPathEvalExpression func-

tion. The function returns an xmlXPathObjectPtr, which includes the set of

nodes satisfying the XPath expression.

xmlXPathObjectPtr

getnodeset (xmlDocPtr doc, xmlChar *xpath){

❶xmlXPathContextPtr context;

xmlXPathObjectPtr result;

❷context = xmlXPathNewContext(doc);

❸result = xmlXPathEvalExpression(xpath, context);

❹if(xmlXPathNodeSetIsEmpty(result->nodesetval)){

xmlXPathFreeObject(result);

printf("No result\n");

return NULL;

❶ First we declare our variables.

❷ Initialize the context variable.

❸ Apply the XPath expression.

❹ Check the result and free the memory allocated to result if no result is

found.

The xmlPathObjectPtr returned by the function contains a set of nodes and other

information needed to iterate through the set and act on the results. For this ex-

ample, our functions returns the xmlXPathObjectPtr. We use it to print the

contents of keyword nodes in our document. The node set object includes the

number of elements in the set (nodeNr) and an array of nodes (nodeTab):

❶for (i=0; i < nodeset->nodeNr; i++) {

❷keyword = xmlNodeListGetString(doc, nodeset->nodeTab[i]->xmlChildrenNode, 1);

printf("keyword: %s\n", keyword);

xmlFree(keyword);

}

❶ The value of nodeset->Nr holds the number of elements in the node

set. Here we use it to iterate through the array.

❷ Here we print the contents of each of the nodes returned.

Libxml Tutorial

评论收藏

内容反馈

ziyueluo

2013-03-12

很复杂，编译能过
godspeed

2013-12-24

不错，都能用vc6和codeblock都能用
woyaoxiazaidongxia

2012-09-21

对操作xml非常方便，可跨平台
wllenyj

2011-11-16

好大的工程，我想要个小点的，只有文件的读写解析就好啊
wangmeijvan

2013-12-17

还没有试过编译，不过浏览文件很完整~

前往

页

xrdks

粉丝: 3
资源: 13

开源跨平台XML解析器-LIBXML2--C源代码及VC6工程文件

libxml VC范例代码

vc++实现读取和解析xml

libxml2源代码

libxml2示例源码

libxml2-2.7.6.tar.gz 源代码

tinyxml VC6.0

开源跨平台XML解析器-LIBXML2--库-rhel5/x86_64

开源跨平台XML解析器-LIBXML2--库-hpux 11/ia64

开源跨平台XML解析器-LIBXML2--库-SOLARIS10/SPARC

开源跨平台XML解析器-MINIXML-C源文件及VXWORKS工程文件

开源跨平台XML解析器-LIBXML2--库-REDHAT9/X86

XML文件的解析－－libxml库函数解释

xml解析器 - libxml2-2.7.7

XML-LibXML-2.0126.tar.gz

perl-XML-LibXML-2.0132-2.el8.x86_64.rpm

perl-XML-LibXML-2.0132-2.el8.aarch64.rpm

perl-XML-LibXML-2.0132-2.el8.ppc64le.rpm

XML解析器LIBXML2多个平台下的库和头文件

Ubuntu下C语言使用libxml2库创建、解析xml文件

libxml2-解析xml格式文件

Linux下xml解析-libxml库函数

个人总结C语言下xml使用全集-libxml.docx

libxml2-2.9.8.rar_C语言解析XML_ITW_c语言XML解析器_joined4mf_windows 8

libxml2生成，解析，修改xml文件

libxml2-2.9.0-12.zip libxml2-2.9.0-libxml2-2.9.12共计13个版本汇总

Ubuntu11.10 libxml2-dev

STM32循迹小车（灰度+OpenMV权重判断）

谭浩强C语言程序设计第五版详细答案

51单片机16*16点阵，源代码+仿真实现

最新资源