static void
rasqal_rowsource_sparql_xml_process(rasqal_rowsource_sparql_xml_context* con)
{
if(raptor_sequence_size(con->results_sequence) && con->variables_count > 0)
return;
/* do some parsing - need some results */
while(!raptor_iostream_read_eof(con->iostr)) {
size_t read_len;
read_len = raptor_iostream_read_bytes((char*)con->buffer, 1,
FILE_READ_BUF_SIZE,
con->iostr);
if(read_len > 0) {
RASQAL_DEBUG2("processing %d bytes\n", (int)read_len);
raptor_sax2_parse_chunk(con->sax2, con->buffer, read_len, 0);
con->locator.byte += read_len;
}
if(read_len < FILE_READ_BUF_SIZE) {
/* finished */
raptor_sax2_parse_chunk(con->sax2, NULL, 0, 1);
break;
}
/* end with variables sequence done AND at least one row */
if(con->variables_count > 0 &&
raptor_sequence_size(con->results_sequence) > 0)
break;
}
}
int rdfa_parse_chunk(rdfacontext* context, char* data, size_t wblen, int done)
{
#ifdef LIBRDFA_IN_RAPTOR
#else
xmlSAXHandler handler;
xmlParserCtxtPtr parser;
#endif
/* it is an error to call this before rdfa_parse_start() */
if(context->done)
{
return RDFA_PARSE_FAILED;
}
if(!context->preread)
{
/* search for the <base> tag and use the href contained therein to
* set the parsing context. */
context->wb_preread = rdfa_init_base(context,
&context->working_buffer, &context->wb_allocated, data, wblen);
/* continue looking if in first 131072 bytes of data */
if(!context->base && context->wb_preread < (1<<17))
return RDFA_PARSE_SUCCESS;
#ifdef LIBRDFA_IN_RAPTOR
/* term mappings are needed before SAX2 parsing */
rdfa_setup_initial_context(context);
if(raptor_sax2_parse_chunk(context->sax2,
(const unsigned char*)context->working_buffer,
context->wb_position, done))
{
return RDFA_PARSE_FAILED;
}
#else
/* create the SAX2 handler structure */
memset(&handler, 0, sizeof(xmlSAXHandler));
handler.initialized = XML_SAX2_MAGIC;
handler.startElementNs = (startElementNsSAX2Func)start_element;
handler.endElementNs = (endElementNsSAX2Func)end_element;
handler.characters = (charactersSAXFunc)character_data;
handler.error = (errorSAXFunc)rdfa_report_error;
/* create a push-based parser */
parser = xmlCreatePushParserCtxt(
&handler, context, (const char*)context->working_buffer,
context->wb_position, NULL);
/* ensure that entity substitution is turned on by default */
xmlSubstituteEntitiesDefault(1);
context->parser = parser;
rdfa_setup_initial_context(context);
#endif
context->preread = 1;
return RDFA_PARSE_SUCCESS;
}
/* otherwise just parse the block passed in */
#ifdef LIBRDFA_IN_RAPTOR
if(raptor_sax2_parse_chunk(context->sax2,
(const unsigned char*)data, wblen, done))
{
return RDFA_PARSE_FAILED;
}
#else
if(xmlParseChunk(context->parser, data, wblen, done))
{
return RDFA_PARSE_FAILED;
}
#endif
return RDFA_PARSE_SUCCESS;
}
