[Opensync-commits] r5154 - format-plugins/xsltformat/src

[<dg...@su...>]

Author: savago
Date: Thu Jan 15 19:48:12 2009
New Revision: 5154
URL: http://www.opensync.org/changeset/5154

Log:
Copying xslt conversion code from google-data plugin to here.

Added:
   format-plugins/xsltformat/src/xslt_aux.h
      - copied unchanged from r5153, plugins/google-calendar/src/xslt_aux.h

Copied: format-plugins/xsltformat/src/xslt_aux.h (from r5153, plugins/google-calendar/src/xslt_aux.h)
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ format-plugins/xsltformat/src/xslt_aux.h	Thu Jan 15 19:48:12 2009	(r5154, copy of r5153, plugins/google-calendar/src/xslt_aux.h)
@@ -0,0 +1,187 @@
+/*
+  Copyright (c) 2008 Instituto Nokia de Tecnologia
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification,
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+  * Neither the name of the INdT nor the names of its contributors
+  may be used to endorse or promote products derived from this software
+  without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+  POSSIBILITY OF SUCH DAMAGE.
+*/
+/**
+ * @file   xslt_aux.h
+ * @author Adenilson Cavalcanti da Silva <ade...@in...>
+ * @date   Mon Aug 25 15:50:20 2008
+ *
+ * @brief  A XSLT helper module, converts a XML doc to another format
+ * using a xslt file.
+ *
+ * Depends on libxml and libxslt.
+ *
+ * \todo:
+ * - doxygen comments about use
+ * - move code to a '.c' file or make functions static
+ * - make 'xslt_resources' an abstract type
+ *
+ */
+
+#ifndef __XSLT_AUX__
+#define __XSLT_AUX__
+
+#include <libxml/HTMLtree.h>
+#include <libxml/catalog.h>
+#include <libxml/debugXML.h>
+#include <libxml/xinclude.h>
+#include <libxml/xmlIO.h>
+#include <libxml/xmlmemory.h>
+#include <libxslt/transform.h>
+#include <libxslt/xslt.h>
+#include <libxslt/xsltInternals.h>
+#include <libxslt/xsltutils.h>
+#include <string.h>
+
+struct xslt_resources {
+	xmlDocPtr output;
+	xmlDocPtr doc;
+	xsltStylesheetPtr cur;
+	xmlChar *xml_str;
+	int length;
+	char init_flag;
+};
+
+struct xslt_resources *xslt_new(void)
+{
+	struct xslt_resources *result;
+	result = (struct xslt_resources *)malloc(sizeof(struct xslt_resources));
+	if (result)
+		memset(result, 0, sizeof(struct xslt_resources));
+
+	return result;
+}
+
+int xslt_initialize(struct xslt_resources *ctx, const char *stylesheet_path)
+{
+	int result = -1;
+	if (!stylesheet_path || !ctx)
+		goto exit;
+
+	xmlSubstituteEntitiesDefault(1);
+	xmlLoadExtDtdDefaultValue = 1;
+
+	if (ctx->cur)
+		xsltFreeStylesheet(ctx->cur);
+
+	ctx->cur = xsltParseStylesheetFile((const xmlChar *)stylesheet_path);
+	if (!ctx->cur) {
+		fprintf(stderr, "Cannot create XSLT context!\n");
+		goto exit;
+	}
+
+	result = 0;
+	ctx->init_flag = 1;
+exit:
+	return result;
+}
+
+int xslt_transform(struct xslt_resources *ctx, const char *document)
+{
+	int result = -1;
+	if (!ctx || !document)
+		goto exit;
+
+	if (ctx->doc)
+		xmlFreeDoc(ctx->doc);
+	if (ctx->output)
+		xmlFreeDoc(ctx->output);
+	ctx->output = NULL;
+
+	ctx->doc = xmlReadMemory(document, strlen(document), "noname.xml",
+				 NULL, 0);
+	if (!ctx->doc) {
+		fprintf(stderr, "Cannot create document with "
+			"entry!\n");
+		goto cleanup;
+	}
+
+	ctx->output = xsltApplyStylesheet(ctx->cur, ctx->doc, NULL);
+	if (!ctx->output) {
+		fprintf(stderr, "Cannot create document with "
+			"output!\n");
+		goto cleanup;
+	}
+
+	if (ctx->xml_str) {
+		xmlFree(ctx->xml_str);
+		ctx->xml_str = NULL;
+	}
+	xmlDocDumpMemory(ctx->output, &(ctx->xml_str), &(ctx->length));
+
+	result = 0;
+
+cleanup:
+	if (ctx->doc)
+		xmlFreeDoc(ctx->doc);
+	ctx->doc = NULL;
+
+	if (ctx->output)
+		xmlFreeDoc(ctx->output);
+	ctx->output = NULL;
+exit:
+
+	return result;
+}
+
+void xslt_delete(struct xslt_resources *ctx)
+{
+	if (!ctx)
+		return;
+
+	/* TODO: 'output' is pointing to a non null value (probably an
+	 * overflow in some other place) even when not initialized.
+	 * It happens just after all clients are disconnected.
+	 * I must investigate it further, for while the flag is a work
+	 * around to stop msync to crash.
+	 */
+/* 	fprintf(stderr, "\ndoc: %x\tout: %x\txml: %x\tcur: %x\n\n", */
+/* 		ctx->doc, ctx->output, ctx->xml_str, ctx->cur); */
+
+	if (!ctx->init_flag)
+		goto exit;
+
+
+	if (ctx->doc)
+		xmlFreeDoc(ctx->doc);
+	if (ctx->output)
+		xmlFreeDoc(ctx->output);
+	if (ctx->xml_str)
+		xmlFree(ctx->xml_str);
+	if (ctx->cur) {
+		xsltFreeStylesheet(ctx->cur);
+		xsltCleanupGlobals();
+		xmlCleanupParser();
+	}
+
+exit:
+
+	free(ctx);
+}
+
+#endif