/**
* rasqal_rowsource_visit:
* @node: #rasqal_rowsource row source
* @fn: pointer to function to apply that takes user data and rowsource parameters
* @user_data: user data for applied function
*
* Visit a user function over a #rasqal_rowsource
*
* If the user function @fn returns 0, the visit is truncated.
*
* Return value: non-0 if the visit was truncated or on failure.
**/
int
rasqal_rowsource_visit(rasqal_rowsource* rowsource,
rasqal_rowsource_visit_fn fn,
void *user_data)
{
int result;
int offset;
rasqal_rowsource* inner_rs;
if(!rowsource || !fn)
return 1;
result = fn(rowsource, user_data);
/* end if failed */
if(result < 0)
return result;
/* Do not recurse if handled */
if(result > 0)
return 0;
for(offset = 0;
(inner_rs = rasqal_rowsource_get_inner_rowsource(rowsource, offset));
offset++) {
result = rasqal_rowsource_visit(inner_rs, fn, user_data);
/* end if failed */
if(result < 0)
return result;
}
return 0;
}
static int
rasqal_rowsource_write_internal(rasqal_rowsource *rowsource,
raptor_iostream* iostr, int indent)
{
const char* rs_name = rowsource->handler->name;
int arg_count = 0;
unsigned int indent_delta;
int offset;
rasqal_rowsource* inner_rowsource;
indent_delta = (unsigned int)strlen(rs_name);
raptor_iostream_counted_string_write(rs_name, indent_delta, iostr);
raptor_iostream_counted_string_write("(\n", 2, iostr);
indent_delta++;
indent += indent_delta;
rasqal_rowsource_write_indent(iostr, indent);
for(offset = 0;
(inner_rowsource = rasqal_rowsource_get_inner_rowsource(rowsource, offset));
offset++) {
if(arg_count) {
raptor_iostream_counted_string_write(" ,\n", 3, iostr);
rasqal_rowsource_write_indent(iostr, indent);
}
rasqal_rowsource_write_internal(inner_rowsource, iostr, indent);
arg_count++;
}
raptor_iostream_write_byte('\n', iostr);
indent-= indent_delta;
rasqal_rowsource_write_indent(iostr, indent);
raptor_iostream_write_byte(')', iostr);
return 0;
}
/**
* rasqal_rowsource_visit:
* @node: #rasqal_rowsource row source
* @fn: pointer to function to apply that takes user data and rowsource parameters
* @user_data: user data for applied function
*
* Visit a user function over a #rasqal_rowsource
*
* If the user function @fn returns 0, the visit is truncated.
*
* Return value: 0 if the visit was truncated.
**/
int
rasqal_rowsource_visit(rasqal_rowsource* rowsource,
rasqal_rowsource_visit_fn fn,
void *user_data)
{
int result;
int offset;
rasqal_rowsource* inner_rs;
result = fn(rowsource, user_data);
if(result)
return result;
for(offset = 0;
(inner_rs = rasqal_rowsource_get_inner_rowsource(rowsource, offset));
offset++) {
result = rasqal_rowsource_visit(inner_rs, fn, user_data);
if(result)
return result;
}
return 0;
}
