/* Interface to libxml2.
- Copyright (C) 2010-2011 Free Software Foundation, Inc.
+ Copyright (C) 2010-2013 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#ifdef HAVE_LIBXML2
-#include <setjmp.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/HTMLparser.h>
#include "lisp.h"
+#include "character.h"
#include "buffer.h"
+\f
+static Lisp_Object Qlibxml2_dll;
+
+#ifdef WINDOWSNT
+
+#include <windows.h>
+#include "w32.h"
+
+/* Macro for defining functions that will be loaded from the libxml2 DLL. */
+#define DEF_XML2_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args
+
+/* Macro for loading libxml2 functions from the library. */
+#define LOAD_XML2_FN(lib,func) { \
+ fn_##func = (void *) GetProcAddress (lib, #func); \
+ if (!fn_##func) goto bad_library; \
+ }
+
+DEF_XML2_FN (htmlDocPtr, htmlReadMemory,
+ (const char *, int, const char *, const char *, int));
+DEF_XML2_FN (xmlDocPtr, xmlReadMemory,
+ (const char *, int, const char *, const char *, int));
+DEF_XML2_FN (xmlNodePtr, xmlDocGetRootElement, (xmlDocPtr));
+DEF_XML2_FN (void, xmlFreeDoc, (xmlDocPtr));
+DEF_XML2_FN (void, xmlCleanupParser, (void));
+DEF_XML2_FN (void, xmlCheckVersion, (int));
+
+static int
+libxml2_loaded_p (void)
+{
+ Lisp_Object found = Fassq (Qlibxml2_dll, Vlibrary_cache);
+
+ if (CONSP (found))
+ return EQ (XCDR (found), Qt) ? 1 : 0;
+ return 0;
+}
+
+#else /* !WINDOWSNT */
+
+#define fn_htmlReadMemory htmlReadMemory
+#define fn_xmlReadMemory xmlReadMemory
+#define fn_xmlDocGetRootElement xmlDocGetRootElement
+#define fn_xmlFreeDoc xmlFreeDoc
+#define fn_xmlCleanupParser xmlCleanupParser
+#define fn_xmlCheckVersion xmlCheckVersion
+
+static int
+libxml2_loaded_p (void)
+{
+ return 1;
+}
+
+#endif /* !WINDOWSNT */
+
+static int
+init_libxml2_functions (void)
+{
+#ifdef WINDOWSNT
+ if (libxml2_loaded_p ())
+ return 1;
+ else
+ {
+ HMODULE library;
+
+ if (!(library = w32_delayed_load (Qlibxml2_dll)))
+ {
+ message ("%s", "libxml2 library not found");
+ return 0;
+ }
+
+ /* LOAD_XML2_FN jumps to bad_library if it fails to find the
+ named function. */
+ LOAD_XML2_FN (library, htmlReadMemory);
+ LOAD_XML2_FN (library, xmlReadMemory);
+ LOAD_XML2_FN (library, xmlDocGetRootElement);
+ LOAD_XML2_FN (library, xmlFreeDoc);
+ LOAD_XML2_FN (library, xmlCleanupParser);
+ LOAD_XML2_FN (library, xmlCheckVersion);
+
+ Vlibrary_cache = Fcons (Fcons (Qlibxml2_dll, Qt), Vlibrary_cache);
+ return 1;
+ }
+
+ bad_library:
+ Vlibrary_cache = Fcons (Fcons (Qlibxml2_dll, Qnil), Vlibrary_cache);
+
+ return 0;
+#else /* !WINDOWSNT */
+ return 1;
+#endif /* !WINDOWSNT */
+}
+
static Lisp_Object
make_dom (xmlNode *node)
{
ptrdiff_t bytes;
ptrdiff_t istart, iend;
- LIBXML_TEST_VERSION;
+ fn_xmlCheckVersion (LIBXML_VERSION);
validate_region (&start, &end);
bytes = CHAR_TO_BYTE (iend) - CHAR_TO_BYTE (istart);
if (htmlp)
- doc = htmlReadMemory ((char *) BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
- bytes, burl, "utf-8",
- HTML_PARSE_RECOVER|HTML_PARSE_NONET|
- HTML_PARSE_NOWARNING|HTML_PARSE_NOERROR|
- HTML_PARSE_NOBLANKS);
+ doc = fn_htmlReadMemory ((char *) BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
+ bytes, burl, "utf-8",
+ HTML_PARSE_RECOVER|HTML_PARSE_NONET|
+ HTML_PARSE_NOWARNING|HTML_PARSE_NOERROR|
+ HTML_PARSE_NOBLANKS);
else
- doc = xmlReadMemory ((char *) BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
- bytes, burl, "utf-8",
- XML_PARSE_NONET|XML_PARSE_NOWARNING|
- XML_PARSE_NOBLANKS |XML_PARSE_NOERROR);
+ doc = fn_xmlReadMemory ((char *) BYTE_POS_ADDR (CHAR_TO_BYTE (istart)),
+ bytes, burl, "utf-8",
+ XML_PARSE_NONET|XML_PARSE_NOWARNING|
+ XML_PARSE_NOBLANKS |XML_PARSE_NOERROR);
if (doc != NULL)
{
if (NILP (result)) {
/* The document isn't just comments, so get the tree the
proper way. */
- xmlNode *node = xmlDocGetRootElement (doc);
+ xmlNode *node = fn_xmlDocGetRootElement (doc);
if (node != NULL)
result = make_dom (node);
} else
result = Fcons (intern ("top"),
Fcons (Qnil, Fnreverse (Fcons (r, result))));
- xmlFreeDoc (doc);
+ fn_xmlFreeDoc (doc);
}
return result;
}
+void
+xml_cleanup_parser (void)
+{
+ if (libxml2_loaded_p ())
+ fn_xmlCleanupParser ();
+}
+
DEFUN ("libxml-parse-html-region", Flibxml_parse_html_region,
Slibxml_parse_html_region,
2, 3, 0,
If BASE-URL is non-nil, it is used to expand relative URLs. */)
(Lisp_Object start, Lisp_Object end, Lisp_Object base_url)
{
- return parse_region (start, end, base_url, 1);
+ if (init_libxml2_functions ())
+ return parse_region (start, end, base_url, 1);
+ return Qnil;
}
DEFUN ("libxml-parse-xml-region", Flibxml_parse_xml_region,
If BASE-URL is non-nil, it is used to expand relative URLs. */)
(Lisp_Object start, Lisp_Object end, Lisp_Object base_url)
{
- return parse_region (start, end, base_url, 0);
+ if (init_libxml2_functions ())
+ return parse_region (start, end, base_url, 0);
+ return Qnil;
}
\f
{
defsubr (&Slibxml_parse_html_region);
defsubr (&Slibxml_parse_xml_region);
+
+ DEFSYM (Qlibxml2_dll, "libxml2");
}
#endif /* HAVE_LIBXML2 */
HCoop / bpt / emacs.git / blobdiff