Applied another patch from Joel Reed, fixed a segfault and changed the

* tests/plugins/plugin.* tests/Makefile.am libxslt/extensions.c
  libxslt/Makefile.am configure.in: Applied another patch from
  Joel Reed, fixed a segfault and changed the configure code
  a bit to work in my debug environment.
Daniel

ChangeLog

@@ -1,3 +1,10 @@
+Sat Jan 15 13:54:28 CET 2005 Daniel Veillard <daniel@veillard.com>
+
+	* tests/plugins/plugin.* tests/Makefile.am libxslt/extensions.c
+	  libxslt/Makefile.am configure.in: Applied another patch from
+	  Joel Reed, fixed a segfault and changed the configure code
+	  a bit to work in my debug environment.
+
 Tue Jan 11 10:50:33 HKT 2005 William Brack <wbrack@mmm.com.hk>
 
 	* configure.in: added python2.4 to the list of accepted

configure.in

@@ -22,6 +22,7 @@ LIBXSLT_VERSION=$LIBXSLT_MAJOR_VERSION.$LIBXSLT_MINOR_VERSION.$LIBXSLT_MICRO_VER
 LIBXSLT_VERSION_INFO=`expr $LIBXSLT_MAJOR_VERSION + $LIBXSLT_MINOR_VERSION`:$LIBXSLT_MICRO_VERSION:$LIBXSLT_MINOR_VERSION
 
 LIBXSLT_VERSION_NUMBER=`expr $LIBXSLT_MAJOR_VERSION \* 10000 + $LIBXSLT_MINOR_VERSION \* 100 + $LIBXSLT_MICRO_VERSION`
+LIBXSLT_MAJOR_MINOR_VERSION=$LIBXSLT_MAJOR_VERSION.$LIBXSLT_MINOR_VERSION
 
 if test -f CVS/Entries; then
   extra=`grep ChangeLog CVS/Entries | grep -v LIBXSLT | sed -e s\%/ChangeLog/1\.%% -e s\%/.*$%%`
@@ -39,6 +40,7 @@ AC_SUBST(LIBXSLT_VERSION)
 AC_SUBST(LIBXSLT_VERSION_INFO)
 AC_SUBST(LIBXSLT_VERSION_NUMBER)
 AC_SUBST(LIBXSLT_VERSION_EXTRA)
+AC_SUBST(LIBXSLT_MAJOR_MINOR_VERSION)
 
 dnl
 dnl libexslt is an extension library
@@ -283,6 +285,7 @@ if [[ "${LOGNAME}" = "veillard" -a "`pwd`" = "/u/veillard/XSLT" ]] || \
     if test "$LOGNAME" = "veillard"
     then
         LIBXML_SRC="/u/veillard/XML"
+	EXTRA_LIBS="$EXTRA_LIBS -ldl"
     fi
 else
     STATIC_BINARIES=
@@ -456,13 +459,14 @@ else
 fi
 
 AC_SUBST(WITH_MODULES)
+AM_CONDITIONAL(WITH_MODULES, test "$WITH_MODULES" == "1")
 
 dnl
 dnl setup default module path
 dnl
 module_prefix=$prefix
 test "x$module_prefix" = xNONE && module_prefix=$ac_default_prefix
-LIBXSLT_DEFAULT_PLUGINS_PATH="\"$module_prefix/lib/libxslt/$LIBXSLT_MAJOR_VERSION.$LIBXSLT_MINOR_VERSION/\""
+LIBXSLT_DEFAULT_PLUGINS_PATH="\"$module_prefix/lib/libxslt/$LIBXSLT_MAJOR_VERSION.$LIBXSLT_MINOR_VERSION\""
 AC_SUBST(LIBXSLT_DEFAULT_PLUGINS_PATH)
 
 dnl
@@ -518,7 +522,7 @@ AC_SUBST(EXSLT_LIBDIR)
 AC_SUBST(EXSLT_INCLUDEDIR)
 AC_SUBST(EXSLT_LIBS)
 
-EXTRA_LIBS="$LIBXML_LIBS $M_LIBS"
+EXTRA_LIBS="$EXTRA_LIBS $LIBXML_LIBS $M_LIBS"
 AC_SUBST(EXTRA_LIBS)
 
 AC_SUBST(M_LIBS)

libxslt/Makefile.am

@@ -57,5 +57,21 @@ man_MANS = libxslt.3
 
 EXTRA_DIST = $(man_MANS) trio.h triodef.h
 
+
+# somewhat unconventional pkglibdir, but noinst_LTLIBRARIES
+# never build DSOs (afaik). NOTE: must be defined outside the AM_CONDITIONAL
+pkglibdir=$(shell pwd)/../tests/plugins
+
+if WITH_MODULES
+pkglib_LTLIBRARIES = xmlsoft_org_xslt_testplugin.la
+
+xmlsoft_org_xslt_testplugin_la_CFLAGS = -DMODULE_COMPILE $(LIBXML_CFLAGS) $(LIBXSLT_CFLAGS)
+xmlsoft_org_xslt_testplugin_la_SOURCES = testplugin.c
+xmlsoft_org_xslt_testplugin_la_LDFLAGS = -module -avoid-version $(LIBXML_LIBS) $(LIBXSLT_LIBS)
+
+check-local: install-pkglibLTLIBRARIES
+
+endif
+
 xsltproc: all
 	@(cd ../xsltproc ; $(MAKE))

libxslt/extensions.c

@@ -298,8 +298,17 @@ typedef void (*exsltRegisterFunction) (void);
  * xsltExtModuleRegisterDynamic:
  * @URI:  the function or element namespace URI
  *
- * Looks up an extension module to dynamically load
+ * Dynamically loads an extension plugin when available.
- * based on the namespace URI
+ * 
+ * The plugin name is derived from the URI by removing the 
+ * initial protocol designation, e.g. "http://", then converting
+ * the characters ".", "-", "/", and "\" into "_", the removing
+ * any trailing "/", then concatenating LIBXML_MODULE_EXTENSION.
+ * 
+ * Plugins are loaded from the directory specified by the 
+ * environment variable LIBXSLT_PLUGINS_PATH, or if NULL, 
+ * by LIBXSLT_DEFAULT_PLUGINS_PATH() which is determined at
+ * compile time.
  *
  * Returns 0 if successful, -1 in case of error. 
  */
@@ -310,10 +319,12 @@ xsltExtModuleRegisterDynamic(const xmlChar * URI)
 
     xmlModulePtr m;
     exsltRegisterFunction regfunc;
+    xmlChar *ext_name;
     xmlChar module_filename[PATH_MAX];
-    const xmlChar *extNameBegin = NULL;
+    const xmlChar *ext_directory = NULL;
-    const xmlChar *extDirectory = NULL;
+    const xmlChar *protocol = NULL;
-    int i, rc, seen_before;
+    xmlChar *i, *regfunc_name;
+    int rc, seen_before;
 
     /* check for bad inputs */
     if (URI == NULL)
@@ -331,43 +342,75 @@ xsltExtModuleRegisterDynamic(const xmlChar * URI)
         return (-1);
     }
 
-    for (i = xmlStrlen(URI); i != 0 && extNameBegin == NULL; --i) {
+    /* transform extension namespace into a module name */
-        if (URI[i - 1] == '/')
+    protocol = xmlStrstr(URI, "://");
-            extNameBegin = URI + i;
+    if (protocol == NULL) {
+        ext_name = xmlStrdup(URI);
+    } else {
+        ext_name = xmlStrdup(protocol + 3);
+    }
+    if (ext_name == NULL) {
+        return (-1);
     }
 
-    if (extNameBegin == NULL || *extNameBegin == '\0')
+    i = ext_name;
-        return (-1);
+    while ('\0' != *i) {
+        if (('/' == *i) || ('\\' == *i) || ('.' == *i) || ('-' == *i))
+            *i = '_';
+        i++;
+    }
+
+    if (*(i - 1) == '_')
+        *i = '\0';
 
     /* determine module directory */
-    extDirectory = getenv(BAD_CAST "LIBXSLT_PLUGINS_PATH");
+    ext_directory = getenv(BAD_CAST "LIBXSLT_PLUGINS_PATH");
-    if (NULL == extDirectory)
+    if (NULL == ext_directory)
-        extDirectory = LIBXSLT_DEFAULT_PLUGINS_PATH();
+        ext_directory = LIBXSLT_DEFAULT_PLUGINS_PATH();
-    if (NULL == extDirectory)
+    if (NULL == ext_directory)
         return (-1);
 
     /* build the module filename, and confirm the module exists */
-    xmlStrPrintf(module_filename, sizeof(module_filename), "%s%s%s",
+    xmlStrPrintf(module_filename, sizeof(module_filename), "%s/%s%s",
-                 extDirectory, extNameBegin, LIBXML_MODULE_EXTENSION);
+                 ext_directory, ext_name, LIBXML_MODULE_EXTENSION);
-    if (1 != xmlCheckFilename(module_filename))
+    if (1 != xmlCheckFilename(module_filename)) {
+        xmlFree(ext_name);
         return (-1);
-
-    m = xmlModuleOpen(module_filename, 0);
-    if (NULL == m)
-        return (-1);
-
-    rc = xmlModuleSymbol(m, "exsltRegisterModule", (void **) &regfunc);
-    if (0 == rc) {
-        (*regfunc) ();
     }
 
+    /* attempt to open the module */
+    m = xmlModuleOpen(module_filename, 0);
+    if (NULL == m) {
+        xmlFree(ext_name);
+        return (-1);
+    }
+
+    /* construct initialization func name */
+    regfunc_name = xmlStrdup(ext_name);
+    regfunc_name = xmlStrcat(regfunc_name, "_init");
+
+    rc = xmlModuleSymbol(m, regfunc_name, (void **) &regfunc);
+    if (0 == rc) {
+        /* call the module's init function */
+        (*regfunc) ();
+
         /* register this module in our hash */
         xmlHashAddEntry(xsltModuleHash, URI, (void *) m);
+    } else {
+        /* if regfunc not found unload the module immediately */
+        xmlModuleClose(m);
+    }
 
+    xmlFree(ext_name);
+    xmlFree(regfunc_name);
     return (NULL == regfunc) ? -1 : 0;
 }
 #else
-#define xsltExtModuleRegisterDynamic(b) -1
+static int
+xsltExtModuleRegisterDynamic(const xmlChar * ATTRIBUTE_UNUSED URI)
+{
+  return -1;
+}
 #endif
 
 /************************************************************************

libxslt/xsltwin32config.h

@@ -44,7 +44,7 @@ extern "C" {
  *
  * extra version information, used to show a CVS compilation
  */
-#define LIBXML_VERSION_EXTRA "-CVS978"
+#define LIBXML_VERSION_EXTRA "-CVS980"
 
 /**
  * WITH_XSLT_DEBUG:

tests/Makefile.am

@@ -12,6 +12,7 @@ all:
 # and (if errors are expected) in *.err
 test tests:
 	@(cur=`pwd` ; for dir in $(SUBDIRS) ; do cd $$dir ; $(MAKE) CHECKER='$(CHECKER)' tests ; cd $$cur ; done)
+	$(MAKE) plugin_tests
 
 valgrind:
 	@echo '## Running the regression tests under Valgrind'
@@ -23,3 +24,15 @@ full: tests docbook_tests
 docbook_tests:
 	@(cd docbook ; $(MAKE) full)
 
+if WITH_MODULES
+
+plugin_tests:
+	@echo Running the plugin tests...
+	@(cd plugins && LIBXSLT_PLUGINS_PATH=. $(top_builddir)/../xsltproc/xsltproc plugin.xsl plugin.xml)
+
+else
+
+plugin_tests:
+	@echo Skipping the plugin tests.
+
+endif

tests/plugins/plugin.out

@@ -0,0 +1,3 @@
+<?xml version="1.0"?>
+<!--libxslt:testplugin element test worked-->
+SUCCESS

tests/plugins/plugin.xml

@@ -0,0 +1 @@
+<doc/>

tests/plugins/plugin.xsl

@@ -0,0 +1,12 @@
+<?xml version='1.0'?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  xmlns:libxslt="http://xmlsoft.org/xslt/testplugin"
+  xmlns:test="http://xmlsoft.org/xslt/testplugin"
+  xsl:extension-element-prefixes="libxslt test"
+  version='1.0'>
+<!-- the prefix is registered twice to check single initialization -->
+<xsl:template match="/">
+<libxslt:testplugin/>
+<xsl:value-of select="libxslt:testplugin('SUCCESS')"/>
+</xsl:template>
+</xsl:stylesheet>