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[wxWidgets.git] / src / expat / examples / elements.c
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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
10static void
11startElement(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
21static void
22endElement(void *userData, const char *name)
23{
24 int *depthPtr = userData;
25 *depthPtr -= 1;
26}
27
28int
29main(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}