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1 /* This is simple demonstration of how to use expat. This program
2 reads an XML document from standard input and writes a line with
3 the name of each element to standard output indenting child
4 elements by one tab stop more than their parent element.
5 */
6
7 #include <stdio.h>
8 #include "expat.h"
9
10 static void
11 startElement(void *userData, const char *name, const char **atts)
12 {
13 int i;
14 int *depthPtr = userData;
15 for (i = 0; i < *depthPtr; i++)
16 putchar('\t');
17 puts(name);
18 *depthPtr += 1;
19 }
20
21 static void
22 endElement(void *userData, const char *name)
23 {
24 int *depthPtr = userData;
25 *depthPtr -= 1;
26 }
27
28 int
29 main(int argc, char *argv[])
30 {
31 char buf[BUFSIZ];
32 XML_Parser parser = XML_ParserCreate(NULL);
33 int done;
34 int depth = 0;
35 XML_SetUserData(parser, &depth);
36 XML_SetElementHandler(parser, startElement, endElement);
37 do {
38 size_t len = fread(buf, 1, sizeof(buf), stdin);
39 done = len < sizeof(buf);
40 if (XML_Parse(parser, buf, len, done) == XML_STATUS_ERROR) {
41 fprintf(stderr,
42 "%s at line %d\n",
43 XML_ErrorString(XML_GetErrorCode(parser)),
44 XML_GetCurrentLineNumber(parser));
45 return 1;
46 }
47 } while (!done);
48 XML_ParserFree(parser);
49 return 0;
50 }