Add libxml extension for common code that is needed to be shared between

various xml extensions.  currently the only implemented support is the
addition of the streams support for libxml.  One new function,
libxml_set_streams_context, which allows a streams context to bet set
prior to loading or writing documents.  This works transparently with any
extension that uses libxml.  All ini settings that effect streams will
also now effect the loading and writing of xml documents.

TODO: linux support, not sure if config.m4 will work right.

1 files changed, 217 insertions, 0 deletions

diff --git a/ext/libxml/libxml.c b/ext/libxml/libxml.c
new file mode 100644
index 0000000000..1683f199c9
--- /dev/null
+++ b/ext/libxml/libxml.c
@@ -0,0 +1,217 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 4                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2003 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.0 of the PHP license,       |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_0.txt.                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Authors: Shane Caraveo <shane@php.net>                               |
+   |          Wez Furlong <wez@thebrainroom.com>                          |
+   +----------------------------------------------------------------------+
+ */
+
+/* $Id$ */
+
+#define IS_EXT_MODULE
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "php.h"
+
+#define PHP_XML_INTERNAL
+#include "zend_variables.h"
+#include "ext/standard/php_string.h"
+#include "ext/standard/info.h"
+
+#if HAVE_LIBXML
+
+#include <libxml/parser.h>
+#include <libxml/parserInternals.h>
+#include <libxml/tree.h>
+#include <libxml/uri.h>
+#include <libxml/xmlerror.h>
+
+#include "php_libxml.h"
+
+#ifdef ZTS
+int libxml_globals_id;
+#else
+PHP_LIBXML_API php_libxml_globals libxml_globals;
+#endif
+
+/* {{{ dynamically loadable module stuff */
+#ifdef COMPILE_DL_LIBXML
+ZEND_GET_MODULE(libxml)
+# ifdef PHP_WIN32
+# include "zend_arg_defs.c"
+# endif
+#endif /* COMPILE_DL_LIBXML */
+/* }}} */
+
+/* {{{ function prototypes */
+PHP_MINIT_FUNCTION(libxml);
+PHP_RINIT_FUNCTION(libxml);
+PHP_MSHUTDOWN_FUNCTION(libxml);
+PHP_RSHUTDOWN_FUNCTION(libxml);
+PHP_MINFO_FUNCTION(libxml);
+
+/* }}} */
+
+/* {{{ extension definition structures */
+function_entry libxml_functions[] = {
+	PHP_FE(libxml_set_streams_context, NULL)
+	{NULL, NULL, NULL}
+};
+
+zend_module_entry libxml_module_entry = {
+    STANDARD_MODULE_HEADER,
+	"libxml",                /* extension name */
+	libxml_functions,        /* extension function list */
+	PHP_MINIT(libxml),       /* extension-wide startup function */
+	PHP_MSHUTDOWN(libxml),   /* extension-wide shutdown function */
+	PHP_RINIT(libxml),       /* per-request startup function */
+	PHP_RSHUTDOWN(libxml),   /* per-request shutdown function */
+	PHP_MINFO(libxml),       /* information function */
+    NO_VERSION_YET,
+	STANDARD_MODULE_PROPERTIES
+};
+
+/* }}} */
+
+/* {{{ startup, shutdown and info functions */
+#ifdef ZTS
+static void php_libxml_init_globals(php_libxml_globals *libxml_globals_p TSRMLS_DC)
+{
+	LIBXML(stream_context) = NULL;
+}
+#endif
+
+/* Channel libxml file io layer through the PHP streams subsystem.
+ * This allows use of ftps:// and https:// urls */
+
+int php_libxml_streams_IO_match_wrapper(const char *filename)
+{
+	TSRMLS_FETCH();
+	return php_stream_locate_url_wrapper(filename, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ? 1 : 0;
+
+}
+
+void *php_libxml_streams_IO_open_wrapper(const char *filename)
+{
+	php_stream_context *context = NULL;
+	TSRMLS_FETCH();
+	if (LIBXML(stream_context)) {
+		context = zend_fetch_resource(&LIBXML(stream_context) TSRMLS_CC, -1, "Stream-Context", NULL, 1, php_le_stream_context());
+		return php_stream_open_wrapper_ex((char *)filename, "rb", ENFORCE_SAFE_MODE|REPORT_ERRORS, NULL, context);
+	}
+	return php_stream_open_wrapper((char *)filename, "rb", ENFORCE_SAFE_MODE|REPORT_ERRORS, NULL);
+}
+
+int php_libxml_streams_IO_read(void *context, char *buffer, int len)
+{
+	TSRMLS_FETCH();
+	return php_stream_read((php_stream*)context, buffer, len);
+}
+
+int php_libxml_streams_IO_write(void *context, const char *buffer, int len)
+{
+	TSRMLS_FETCH();
+	return php_stream_write((php_stream*)context, buffer, len);
+}
+
+int php_libxml_streams_IO_close(void *context)
+{
+	TSRMLS_FETCH();
+	return php_stream_close((php_stream*)context);
+}
+
+PHP_MINIT_FUNCTION(libxml)
+{
+	/* Enable php stream/wrapper support for libxml 
+	   we only use php streams, so we disable the libxml builtin
+	   io support.
+	*/
+	xmlCleanupInputCallbacks();
+	xmlRegisterInputCallbacks(
+		php_libxml_streams_IO_match_wrapper, 
+		php_libxml_streams_IO_open_wrapper,
+		php_libxml_streams_IO_read, 
+		php_libxml_streams_IO_close);
+
+	xmlCleanupOutputCallbacks();
+	xmlRegisterOutputCallbacks(
+		php_libxml_streams_IO_match_wrapper, 
+		php_libxml_streams_IO_open_wrapper,
+		php_libxml_streams_IO_write, 
+		php_libxml_streams_IO_close);
+	
+#ifdef ZTS
+	ts_allocate_id(&libxml_globals_id, sizeof(php_libxml_globals), (ts_allocate_ctor) php_libxml_init_globals, NULL);
+#else
+	LIBXML(stream_context) = NULL;
+#endif
+	return SUCCESS;
+}
+
+
+PHP_RINIT_FUNCTION(libxml)
+{
+    return SUCCESS;
+}
+
+
+PHP_MSHUTDOWN_FUNCTION(libxml)
+{
+	return SUCCESS;
+}
+
+
+PHP_RSHUTDOWN_FUNCTION(libxml)
+{
+	return SUCCESS;
+}
+
+
+PHP_MINFO_FUNCTION(libxml)
+{
+	php_info_print_table_start();
+	php_info_print_table_row(2, "libXML support", "active");
+	php_info_print_table_row(2, "libXML Version", LIBXML_DOTTED_VERSION);
+	php_info_print_table_row(2, "libXML streams", "enabled");
+	php_info_print_table_end();
+}
+/* }}} */
+
+
+/* {{{ proto void libxml_set_streams_context(resource streams_context) 
+   Set the streams context for the next libxml document load or write */
+PHP_FUNCTION(libxml_set_streams_context)
+{
+	zval *arg;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &arg) == FAILURE) {
+		return;
+	}
+	LIBXML(stream_context) = arg;
+}
+/* }}} */
+
+#endif
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */