1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* xlink.c : implementation of the hyperlinks detection module
* This version supports both XML XLinks and HTML simple links
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_XPTR_ENABLED
#include <string.h> /* for memset() only */
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/valid.h>
#include <libxml/xlink.h>
#include <libxml/globals.h>
#define XLINK_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xlink/namespace/")
#define XHTML_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xhtml/")
/****************************************************************
* *
* Default setting and related functions *
* *
****************************************************************/
static xlinkHandlerPtr xlinkDefaultHandler = NULL;
static xlinkNodeDetectFunc xlinkDefaultDetect = NULL;
/**
* xlinkGetDefaultHandler:
*
* Get the default xlink handler.
*
* Returns the current xlinkHandlerPtr value.
*/
xlinkHandlerPtr
xlinkGetDefaultHandler(void) {
return(xlinkDefaultHandler);
}
/**
* xlinkSetDefaultHandler:
* @handler: the new value for the xlink handler block
*
* Set the default xlink handlers
*/
void
xlinkSetDefaultHandler(xlinkHandlerPtr handler) {
xlinkDefaultHandler = handler;
}
/**
* xlinkGetDefaultDetect:
*
* Get the default xlink detection routine
*
* Returns the current function or NULL;
*/
xlinkNodeDetectFunc
xlinkGetDefaultDetect (void) {
return(xlinkDefaultDetect);
}
/**
* xlinkSetDefaultDetect:
* @func: pointer to the new detection routine.
*
* Set the default xlink detection routine
*/
void
xlinkSetDefaultDetect (xlinkNodeDetectFunc func) {
xlinkDefaultDetect = func;
}
/****************************************************************
* *
* The detection routines *
* *
****************************************************************/
/**
* xlinkIsLink:
* @doc: the document containing the node
* @node: the node pointer itself
*
* Check whether the given node carries the attributes needed
* to be a link element (or is one of the linking elements issued
* from the (X)HTML DtDs).
* This routine don't try to do full checking of the link validity
* but tries to detect and return the appropriate link type.
*
* Returns the xlinkType of the node (XLINK_TYPE_NONE if there is no
* link detected.
*/
xlinkType
xlinkIsLink (xmlDocPtr doc, xmlNodePtr node) {
xmlChar *type = NULL, *role = NULL;
xlinkType ret = XLINK_TYPE_NONE;
if (node == NULL) return(XLINK_TYPE_NONE);
if (doc == NULL) doc = node->doc;
if ((doc != NULL) && (doc->type == XML_HTML_DOCUMENT_NODE)) {
/*
* This is an HTML document.
*/
} else if ((node->ns != NULL) &&
(xmlStrEqual(node->ns->href, XHTML_NAMESPACE))) {
/*
* !!!! We really need an IS_XHTML_ELEMENT function from HTMLtree.h @@@
*/
/*
* This is an XHTML element within an XML document
* Check whether it's one of the element able to carry links
* and in that case if it holds the attributes.
*/
}
/*
* We don't prevent a-priori having XML Linking constructs on
* XHTML elements
*/
type = xmlGetNsProp(node, BAD_CAST"type", XLINK_NAMESPACE);
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "simple")) {
ret = XLINK_TYPE_SIMPLE;
} else if (xmlStrEqual(type, BAD_CAST "extended")) {
role = xmlGetNsProp(node, BAD_CAST "role", XLINK_NAMESPACE);
if (role != NULL) {
xmlNsPtr xlink;
xlink = xmlSearchNs(doc, node, XLINK_NAMESPACE);
if (xlink == NULL) {
/* Humm, fallback method */
if (xmlStrEqual(role, BAD_CAST"xlink:external-linkset"))
ret = XLINK_TYPE_EXTENDED_SET;
} else {
xmlChar buf[200];
snprintf((char *) buf, sizeof(buf), "%s:external-linkset",
(char *) xlink->prefix);
buf[sizeof(buf) - 1] = 0;
if (xmlStrEqual(role, buf))
ret = XLINK_TYPE_EXTENDED_SET;
}
}
ret = XLINK_TYPE_EXTENDED;
}
}
if (type != NULL) xmlFree(type);
if (role != NULL) xmlFree(role);
return(ret);
}
#endif /* LIBXML_XPTR_ENABLED */
#define bottom_xlink
#include "elfgcchack.h"
|
