（一）Windows下使用MinGW和Code::Blocks环境配置libxml2
笔者此次是在windows 7下使用MinGW和Code::Blocks开发C程式的，手上的一个项目需要使用socket通讯接收远端主机发来的xml报文，使用C程式解析，所以需要配置libxml2。
首先先到http://xmlsoft.org/sources/win32/下载好libxml2、iconv和zlib的包，并将其对应的bin、include、lib中的内容复制到MinGW对应的bin、include、lib目录中去（libxml2是基于iconv和zlib的
在CB中建立好一个工程后，在settings->compiler->linker settings中添加上述包中的lib（已经添加到MinGW\lib下了），我们可以用libxml2官方的一个例子来测试我们的配置：
将gjobs.xml放在工程文件夹中，将其设置为输入 Project->set programs‘ arguments
笔者在编译成功后，运行的时候遇到过如下的一个错误
“无法定位程序输入点gzdirect于动态链接库zlib1.dll”
解决办法是使用http://www.zlib.net/下载的最新的zlib1.dll替换WINDOWS/system32文件夹下的zlib1.dll （window下优先使用system32下的这个dll，而在安装某些软件时会将它们的zlib1.dll放到system32中，造成版本过低）
运行结果：
附gjobread.c和gjobs.xml源码
1 /*
2 * gjobread.c : a small test program for gnome jobs XML format
3 *
4 * See Copyright for the status of this software.
5 *
6 * [email protected]
7 */
8
9 #include <stdio.h>
10 #include <string.h>
11 #include <stdlib.h>
12
13 /*
14 * This example should compile and run indifferently with libxml-1.8.8 +
15 * and libxml2-2.1.0 +
16 * Check the COMPAT comments below
17 */
18
19 /*
20 * COMPAT using xml-config --cflags to get the include path this will
21 * work with both
22 */
23 #include <libxml/xmlmemory.h>
24 #include <libxml/parser.h>
25
26 #define DEBUG(x) printf(x)
27
28 /*
29 * A person record
30 * an xmlChar * is really an UTF8 encoded char string (0 terminated)
31 */
32 typedef struct person {
33 xmlChar *name;
34 xmlChar *email;
35 xmlChar *company;
36 xmlChar *organisation;
37 xmlChar *smail;
38 xmlChar *webPage;
39 xmlChar *phone;
40 } person, *personPtr;
41
42 /*
43 * And the code needed to parse it
44 */
45 static personPtr
46 parsePerson(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) {
47 personPtr ret = NULL;
48
49 DEBUG("parsePerson\n");
50 /*
51 * allocate the struct
52 */
53 ret = (personPtr) malloc(sizeof(person));
54 if (ret == NULL) {
55 fprintf(stderr,"out of memory\n");
56 return(NULL);
57 }
58 memset(ret, 0, sizeof(person));
59
60 /* We don‘t care what the top level element name is */
61 /* COMPAT xmlChildrenNode is a macro unifying libxml1 and libxml2 names */
62 cur = cur->xmlChildrenNode;
63 while (cur != NULL) {
64 if ((!xmlStrcmp(cur->name, (const xmlChar *)"Person")) &&
65 (cur->ns == ns))
66 ret->name = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
67 if ((!xmlStrcmp(cur->name, (const xmlChar *)"Email")) &&
68 (cur->ns == ns))
69 ret->email = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
70 cur = cur->next;
71 }
72
73 return(ret);
74 }
75
76 /*
77 * and to print it
78 */
79 static void
80 printPerson(personPtr cur) {
81 if (cur == NULL) return;
82 printf("------ Person\n");
83 if (cur->name) printf(" name: %s\n", cur->name);
84 if (cur->email) printf(" email: %s\n", cur->email);
85 if (cur->company) printf(" company: %s\n", cur->company);
86 if (cur->organisation) printf(" organisation: %s\n", cur->organisation);
87 if (cur->smail) printf(" smail: %s\n", cur->smail);
88 if (cur->webPage) printf(" Web: %s\n", cur->webPage);
89 if (cur->phone) printf(" phone: %s\n", cur->phone);
90 printf("------\n");
91 }
92
93 /*
94 * a Description for a Job
95 */
96 typedef struct job {
97 xmlChar *projectID;
98 xmlChar *application;
99 xmlChar *category;
100 personPtr contact;
101 int nbDevelopers;
102 personPtr developers[100]; /* using dynamic alloc is left as an exercise */
103 } job, *jobPtr;
104
105 /*
106 * And the code needed to parse it
107 */
108 static jobPtr
109 parseJob(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) {
110 jobPtr ret = NULL;
111
112 DEBUG("parseJob\n");
113 /*
114 * allocate the struct
115 */
116 ret = (jobPtr) malloc(sizeof(job));
117 if (ret == NULL) {
118 fprintf(stderr,"out of memory\n");
119 return(NULL);
120 }
121 memset(ret, 0, sizeof(job));
122
123 /* We don‘t care what the top level element name is */
124 cur = cur->xmlChildrenNode;
125 while (cur != NULL) {
126
127 if ((!xmlStrcmp(cur->name, (const xmlChar *) "Project")) &&
128 (cur->ns == ns)) {
129 ret->projectID = xmlGetProp(cur, (const xmlChar *) "ID");
130 if (ret->projectID == NULL) {
131 fprintf(stderr, "Project has no ID\n");
132 }
133 }
134 if ((!xmlStrcmp(cur->name, (const xmlChar *) "Application")) &&
135 (cur->ns == ns))
136 ret->application =
137 xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
138 if ((!xmlStrcmp(cur->name, (const xmlChar *) "Category")) &&
139 (cur->ns == ns))
140 ret->category =
141 xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
142 if ((!xmlStrcmp(cur->name, (const xmlChar *) "Contact")) &&
143 (cur->ns == ns))
144 ret->contact = parsePerson(doc, ns, cur);
145 cur = cur->next;
146 }
147
148 return(ret);
149 }
150
151 /*
152 * and to print it
153 */
154 static void
155 printJob(jobPtr cur) {
156 int i;
157
158 if (cur == NULL) return;
159 printf("======= Job\n");
160 if (cur->projectID != NULL) printf("projectID: %s\n", cur->projectID);
161 if (cur->application != NULL) printf("application: %s\n", cur->application);
162 if (cur->category != NULL) printf("category: %s\n", cur->category);
163 if (cur->contact != NULL) printPerson(cur->contact);
164 printf("%d developers\n", cur->nbDevelopers);
165
166 for (i = 0;i < cur->nbDevelopers;i++) printPerson(cur->developers[i]);
167 printf("======= \n");
168 }
169
170 /*
171 * A pool of Gnome Jobs
172 */
173 typedef struct gjob {
174 int nbJobs;
175 jobPtr jobs[500]; /* using dynamic alloc is left as an exercise */
176 } gJob, *gJobPtr;
177
178
179 static gJobPtr
180 parseGjobFile(char *filename) {
181 xmlDocPtr doc;
182 gJobPtr ret;
183 jobPtr curjob;
184 xmlNsPtr ns;
185 xmlNodePtr cur;
186
187 /*
188 * build an XML tree from a the file;
189 */
190 doc = xmlParseFile(filename);
191 if (doc == NULL) return(NULL);
192
193 /*
194 * Check the document is of the right kind
195 */
196
197 cur = xmlDocGetRootElement(doc);
198 if (cur == NULL) {
199 fprintf(stderr,"empty document\n");
200 xmlFreeDoc(doc);
201 return(NULL);
202 }
203 ns = xmlSearchNsByHref(doc, cur,
204 (const xmlChar *) "http://www.gnome.org/some-location");
205 if (ns == NULL) {
206 fprintf(stderr,
207 "document of the wrong type, GJob Namespace not found\n");
208 xmlFreeDoc(doc);
209 return(NULL);
210 }
211 if (xmlStrcmp(cur->name, (const xmlChar *) "Helping")) {
212 fprintf(stderr,"document of the wrong type, root node != Helping");
213 xmlFreeDoc(doc);
214 return(NULL);
215 }
216
217 /*
218 * Allocate the structure to be returned.
219 */
220 ret = (gJobPtr) malloc(sizeof(gJob));
221 if (ret == NULL) {
222 fprintf(stderr,"out of memory\n");
223 xmlFreeDoc(doc);
224 return(NULL);
225 }
226 memset(ret, 0, sizeof(gJob));
227
228 /*
229 * Now, walk the tree.
230 */
231 /* First level we expect just Jobs */
232 cur = cur->xmlChildrenNode;
233 while ( cur && xmlIsBlankNode ( cur ) )
234 {
235 cur = cur -> next;
236 }
237 if ( cur == 0 )
238 return ( NULL );
239 if ((xmlStrcmp(cur->name, (const xmlChar *) "Jobs")) || (cur->ns != ns)) {
240 fprintf(stderr,"document of the wrong type, was ‘%s‘, Jobs expected",
241 cur->name);
242 fprintf(stderr,"xmlDocDump follows\n");
243 xmlDocDump ( stderr, doc );
244 fprintf(stderr,"xmlDocDump finished\n");
245 xmlFreeDoc(doc);
246 free(ret);
247 return(NULL);
248 }
249
250 /* Second level is a list of Job, but be laxist */
251 cur = cur->xmlChildrenNode;
252 while (cur != NULL) {
253 if ((!xmlStrcmp(cur->name, (const xmlChar *) "Job")) &&
254 (cur->ns == ns)) {
255 curjob = parseJob(doc, ns, cur);
256 if (curjob != NULL)
257 ret->jobs[ret->nbJobs++] = curjob;
258 if (ret->nbJobs >= 500) break;
259 }
260 cur = cur->next;
261 }
262
263 return(ret);
264 }
265
266 static void
267 handleGjob(gJobPtr cur) {
268 int i;
269
270 /*
271 * Do whatever you want and free the structure.
272 */
273 printf("%d Jobs registered\n", cur->nbJobs);
274 for (i = 0; i < cur->nbJobs; i++) printJob(cur->jobs[i]);
275 }
276
277 int main(int argc, char **argv) {
278 int i;
279 gJobPtr cur;
280
281 /* COMPAT: Do not genrate nodes for formatting spaces */
282 LIBXML_TEST_VERSION
283 xmlKeepBlanksDefault(0);
284
285 for (i = 1; i < argc ; i++) {
286 cur = parseGjobFile(argv[i]);
287 if ( cur )
288 handleGjob(cur);
289 else
290 fprintf( stderr, "Error parsing file ‘%s‘\n", argv[i]);
291
292 }
293
294 /* Clean up everything else before quitting. */
295 xmlCleanupParser();
296
297 return(0);
298 }
gjobread.c
1 <?xml version="1.0"?> 2 <gjob:Helping xmlns:gjob="http://www.gnome.org/some-location"> 3 <gjob:Jobs> 4 5 <gjob:Job> 6 <gjob:Project ID="3"/> 7 <gjob:Application>GBackup</gjob:Application> 8 <gjob:Category>Development</gjob:Category> 9 10 <gjob:Update> 11 <gjob:Status>Open</gjob:Status> 12 <gjob:Modified>Mon, 07 Jun 1999 20:27:45 -0400 MET DST</gjob:Modified> 13 <gjob:Salary>USD 0.00</gjob:Salary> 14 </gjob:Update> 15 16 <gjob:Developers> 17 <gjob:Developer> 18 </gjob:Developer> 19 </gjob:Developers> 20 21 <gjob:Contact> 22 <gjob:Person>Nathan Clemons</gjob:Person> 23 <gjob:Email>[email protected]</gjob:Email> 24 <gjob:Company> 25 </gjob:Company> 26 <gjob:Organisation> 27 </gjob:Organisation> 28 <gjob:Webpage> 29 </gjob:Webpage> 30 <gjob:Snailmail> 31 </gjob:Snailmail> 32 <gjob:Phone> 33 </gjob:Phone> 34 </gjob:Contact> 35 36 <gjob:Requirements> 37 The program should be released as free software, under the GPL. 38 </gjob:Requirements> 39 40 <gjob:Skills> 41 </gjob:Skills> 42 43 <gjob:Details> 44 A GNOME based system that will allow a superuser to configure 45 compressed and uncompressed files and/or file systems to be backed 46 up with a supported media in the system. This should be able to 47 perform via find commands generating a list of files that are passed 48 to tar, dd, cpio, cp, gzip, etc., to be directed to the tape machine 49 or via operations performed on the filesystem itself. Email 50 notification and GUI status display very important. 51 </gjob:Details> 52 53 </gjob:Job> 54 55 </gjob:Jobs> 56 </gjob:Helping>
gjobs.xml
使用libxml2进行xml开发（一）
时间： 2024-10-19 11:58:09