reader2.c revision b286d84b86ab85abb46a54f38e94de77c4db401c 
1/**
2 * section: xmlReader
3 * synopsis: Parse and validate an XML file with an xmlReader
4 * purpose: Demonstrate the use of xmlReaderForFile() to parse an XML file
5 *          validating the content in the process and activating options
6 *          like entities substitution, and DTD attributes defaulting
7 * usage: reader2 <valid_xml_filename>
8 * test: reader2 test2.xml > reader1.tmp ; diff reader1.tmp reader1.res ; rm reader1.tmp
9 * author: Daniel Veillard
10 * copy: see Copyright for the status of this software.
11 */
12
13#include <stdio.h>
14#include <libxml/xmlreader.h>
15
16/**
17 * processNode:
18 * @reader: the xmlReader
19 *
20 * Dump information about the current node
21 */
22static void
23processNode(xmlTextReaderPtr reader) {
24    const xmlChar *name, *value;
25
26    name = xmlTextReaderConstName(reader);
27    if (name == NULL)
28	name = BAD_CAST "--";
29
30    value = xmlTextReaderConstValue(reader);
31
32    printf("%d %d %s %d %d",
33	    xmlTextReaderDepth(reader),
34	    xmlTextReaderNodeType(reader),
35	    name,
36	    xmlTextReaderIsEmptyElement(reader),
37	    xmlTextReaderHasValue(reader));
38    if (value == NULL)
39	printf("\n");
40    else {
41        if (xmlStrlen(value) > 40)
42            printf(" %.40s...\n", value);
43        else
44	    printf(" %s\n", value);
45    }
46}
47
48/**
49 * streamFile:
50 * @filename: the file name to parse
51 *
52 * Parse, validate and print information about an XML file.
53 */
54static void
55streamFile(const char *filename) {
56    xmlTextReaderPtr reader;
57    int ret;
58
59
60    /*
61     * Pass some special parsing options to activate DTD attribute defaulting,
62     * entities substitution and DTD validation
63     */
64    reader = xmlReaderForFile(filename, NULL,
65                 XML_PARSE_DTDATTR |  /* default DTD attributes */
66		 XML_PARSE_NOENT |    /* substitute entities */
67		 XML_PARSE_DTDVALID); /* validate with the DTD */
68    if (reader != NULL) {
69        ret = xmlTextReaderRead(reader);
70        while (ret == 1) {
71            processNode(reader);
72            ret = xmlTextReaderRead(reader);
73        }
74	/*
75	 * Once the document has been fully parsed check the validation results
76	 */
77	if (xmlTextReaderIsValid(reader) != 1) {
78	    fprintf(stderr, "Document %s does not validate\n", filename);
79	}
80        xmlFreeTextReader(reader);
81        if (ret != 0) {
82            fprintf(stderr, "%s : failed to parse\n", filename);
83        }
84    } else {
85        fprintf(stderr, "Unable to open %s\n", filename);
86    }
87}
88
89int main(int argc, char **argv) {
90    if (argc != 2)
91        return(1);
92
93    /*
94     * this initialize the library and check potential ABI mismatches
95     * between the version it was compiled for and the actual shared
96     * library used.
97     */
98    LIBXML_TEST_VERSION
99
100    streamFile(argv[1]);
101
102    /*
103     * Cleanup function for the XML library.
104     */
105    xmlCleanupParser();
106    return(0);
107}
108