fs_value fn_greater_than_equal(fs_query *q, fs_value a, fs_value b)
{
if (a.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return a;
}
if (b.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return b;
}
/* URIs and bNodes don't compare */
if (FS_IS_URI_BN(a.rid) || FS_IS_URI_BN(b.rid)) {
return fs_value_boolean(0);
}
/* If it's simply the same term it must be <= itsself */
fs_value term_eq = fn_rdfterm_equal(q, a, b);
if (term_eq.in == 1) {
return term_eq;
}
if (a.attr == fs_c.xsd_datetime && b.attr == fs_c.xsd_datetime)
return fn_not(q, fn_datetime_less_than(q, a, b));
if (fs_is_numeric(&a) && fs_is_numeric(&b))
return fn_logical_or(q, fn_numeric_greater_than(q, a, b), fn_numeric_equal(q, a, b));
if (FS_IS_URI_BN(a.rid) || FS_IS_URI_BN(b.rid))
return fs_value_boolean(0);
if (a.lex && b.lex)
return fn_not(q, fn_numeric_equal(q,fn_compare(q, a, b), fs_value_integer(-1)));
return fs_value_error(FS_ERROR_INVALID_TYPE, NULL);
}
fs_value fn_equal(fs_query *q, fs_value a, fs_value b)
{
#if 0
fs_value_print(a);
printf(" = ");
fs_value_print(b);
printf("\n");
#endif
if (a.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return a;
}
if (b.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return b;
}
fs_value term_equal = fn_rdfterm_equal(q, a, b);
if (term_equal.in == 1) {
return term_equal;
}
if (a.attr == fs_c.xsd_datetime)
return fn_datetime_equal(q, a, b);
if (fs_is_numeric(&a) && fs_is_numeric(&b))
return fn_numeric_equal(q, a, b);
if (FS_IS_LITERAL(a.rid) && FS_IS_LITERAL(b.rid) &&
(a.attr == fs_c.empty || a.attr == fs_c.xsd_string) &&
(b.attr == fs_c.empty || b.attr == fs_c.xsd_string)) {
return fs_value_boolean(!strcmp(a.lex, b.lex));
}
return fs_value_boolean(0);
}
fs_value fn_not_equal(fs_query *q, fs_value a, fs_value b)
{
#if 0
fs_value_print(a);
printf(" != ");
fs_value_print(b);
printf("\n");
#endif
if (a.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return a;
}
if (b.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return b;
}
if (a.attr == fs_c.xsd_datetime)
return fn_not(q, fn_datetime_equal(q, a, b));
if (fs_is_numeric(&a) && fs_is_numeric(&b))
return fn_not(q, fn_numeric_equal(q, a, b));
if ((a.attr == fs_c.empty || a.attr == fs_c.xsd_string) &&
(b.attr == fs_c.empty || b.attr == fs_c.xsd_string)) {
return fs_value_boolean(strcmp(a.lex, b.lex));
}
if ((FS_IS_URI_BN(a.rid) && FS_IS_LITERAL(b.rid)) ||
(FS_IS_LITERAL(a.rid) && FS_IS_URI_BN(b.rid))) {
/* ones a URI/bNode and ones a literal, definatly different */
return fs_value_boolean(1);
}
if ((!FS_IS_URI(a.rid) && a.attr != fs_c.empty && FS_IS_LITERAL(a.attr) &&
!FS_IS_LITERAL(b.attr)) ||
(!FS_IS_URI(a.rid) && !FS_IS_LITERAL(a.attr) && b.attr != fs_c.empty &&
FS_IS_LITERAL(b.attr))) {
/* one has a lang tag and one doesn't, definatly different */
return fs_value_boolean(1);
}
if (FS_IS_URI(a.attr) || FS_IS_URI(b.attr)) {
/* at least one argument has an unknown datatype */
return fs_value_boolean(0);
}
return fn_not(q, fn_rdfterm_equal(q, a, b));
}
fs_value fn_greater_than(fs_query *q, fs_value a, fs_value b)
{
if (a.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return a;
}
if (b.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return b;
}
if (a.attr == fs_c.xsd_datetime && b.attr == fs_c.xsd_datetime)
return fn_datetime_greater_than(q, a, b);
if (fs_is_numeric(&a)) return fn_numeric_greater_than(q, a, b);
if (a.lex && b.lex)
return fn_numeric_equal(q, fn_compare(q, a, b), fs_value_integer(1));
return fs_value_error(FS_ERROR_INVALID_TYPE, NULL);
}
fs_value fn_less_than(fs_query *q, fs_value a, fs_value b)
{
if (a.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return a;
}
if (b.valid & fs_valid_bit(FS_V_TYPE_ERROR)) {
return b;
}
#if 0
fs_value_print(a);
printf(" < ");
fs_value_print(b);
printf("\n");
#endif
if (a.attr == fs_c.xsd_datetime && b.attr == fs_c.xsd_datetime) return fn_datetime_less_than(q, a, b);
if (fs_is_numeric(&a)) return fn_numeric_less_than(q, a, b);
if (a.lex && b.lex) return fn_numeric_equal(q, fn_compare(q, a, b), fs_value_integer(-1));
return fs_value_error(FS_ERROR_INVALID_TYPE, NULL);
}
