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/** @file
* @brief HID report descriptor - XML format
*
* Copyright (C) 2010 Nikolai Kondrashov
*
* This file is part of hidrd.
*
* Hidrd is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Hidrd is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with hidrd; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* @author Nikolai Kondrashov <spbnick@gmail.com>
*
* @(#) $Id: xml.c 421 2010-05-13 21:27:21Z spb_nick $
*/
#include <errno.h>
#include <libxml/parser.h>
#include <libxml/xmlschemas.h>
#include "hidrd/fmt/xml.h"
#include "xml.h"
void
xml_error(void *ctx, const char *fmt, ...)
{
char **perr = (char **)ctx;
va_list ap;
char *chunk;
char *new_err;
if (perr == NULL)
return;
va_start(ap, fmt);
if (vasprintf(&chunk, fmt, ap) < 0)
{
if (asprintf(&chunk, "failed to format error message chunk: %s",
strerror(errno)) < 0)
{
assert(!"Failed to format formatting error message");
chunk = NULL;
goto cleanup;
}
}
if (asprintf(&new_err, "%s%s", *perr, chunk) < 0)
{
assert(!"Failed to format new error message");
goto cleanup;
}
free(*perr);
*perr = new_err;
cleanup:
free(chunk);
va_end(ap);
}
bool
xml_validate(bool *pvalid,
xmlDocPtr doc,
const char *schema_path)
{
bool result = false;
xmlDocPtr schema_doc = NULL;
xmlSchemaParserCtxtPtr schema_parser_ctxt = NULL;
xmlSchemaPtr schema = NULL;
xmlSchemaValidCtxtPtr schema_valid_ctxt = NULL;
int valid_rc;
schema_doc = xmlReadFile(schema_path, NULL, XML_PARSE_NONET);
if (schema_doc == NULL)
goto cleanup;
schema_parser_ctxt = xmlSchemaNewDocParserCtxt(schema_doc);
if (schema_parser_ctxt == NULL)
goto cleanup;
schema = xmlSchemaParse(schema_parser_ctxt);
if (schema == NULL)
goto cleanup;
schema_valid_ctxt = xmlSchemaNewValidCtxt(schema);
if (schema_valid_ctxt == NULL)
goto cleanup;
valid_rc = xmlSchemaValidateDoc(schema_valid_ctxt, doc);
if (valid_rc < 0)
goto cleanup;
if (pvalid != NULL)
*pvalid = (valid_rc == 0);
result = true;
cleanup:
xmlSchemaFreeValidCtxt(schema_valid_ctxt);
xmlSchemaFree(schema);
xmlSchemaFreeParserCtxt(schema_parser_ctxt);
if (schema_doc != NULL)
xmlFreeDoc(schema_doc);
return result;
}
static bool
hidrd_xml_init(void)
{
xmlInitParser();
return true;
}
static void
hidrd_xml_clnp(void)
{
xmlCleanupParser();
}
const hidrd_fmt hidrd_xml = {
.name = "xml",
.desc = "XML",
.init = hidrd_xml_init,
.clnp = hidrd_xml_clnp,
.src = &hidrd_xml_src,
.snk = &hidrd_xml_snk
};
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