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index dc3e49942efb0cd4db2f0a3d7e53aa5542364df7..4e777d863f2dbed1a2433da46bf27bd8e62c55e9 100644 (file)
--- a/src/core/store_lookup.c
+++ b/src/core/store_lookup.c
return (status != INT_MAX) && (status > 0);
} /* match_gt */
+/*
+ * cmp_expr:
+ * Compare the values of two expressions when evaluating them using the
+ * specified stored object and filter. Returns a value less than, equal to, or
+ * greater than zero if the value of the first expression compares less than,
+ * equal to, or greater than the value of the second expression. Returns
+ * INT_MAX if any of the expressions could not be evaluated.
+ */
+static int
+cmp_expr(sdb_store_expr_t *e1, sdb_store_expr_t *e2,
+ sdb_store_obj_t *obj, sdb_store_matcher_t *filter)
+{
+ sdb_data_t v1 = SDB_DATA_INIT, v2 = SDB_DATA_INIT;
+ int status;
+
+ if (sdb_store_expr_eval(e1, obj, &v1, filter))
+ return INT_MAX;
+ if (sdb_store_expr_eval(e2, obj, &v2, filter)) {
+ sdb_data_free_datum(&v1);
+ return INT_MAX;
+ }
+
+ if (v1.type == v2.type)
+ status = sdb_data_cmp(&v1, &v2);
+ else
+ status = sdb_data_strcmp(&v1, &v2);
+
+ sdb_data_free_datum(&v1);
+ sdb_data_free_datum(&v2);
+ return status;
+} /* cmp_expr */
+
+static int
+match_cmp_lt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter)
+{
+ int status;
+ assert(m->type == MATCHER_CMP_LT);
+ status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
+ return (status != INT_MAX) && (status < 0);
+} /* match_cmp_lt */
+
+static int
+match_cmp_le(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter)
+{
+ int status;
+ assert(m->type == MATCHER_CMP_LE);
+ status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
+ return (status != INT_MAX) && (status <= 0);
+} /* match_cmp_le */
+
+static int
+match_cmp_eq(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter)
+{
+ int status;
+ assert(m->type == MATCHER_CMP_EQ);
+ status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
+ return (status != INT_MAX) && (! status);
+} /* match_cmp_eq */
+
+static int
+match_cmp_ge(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter)
+{
+ int status;
+ assert(m->type == MATCHER_CMP_GE);
+ status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
+ return (status != INT_MAX) && (status >= 0);
+} /* match_cmp_ge */
+
+static int
+match_cmp_gt(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
+ sdb_store_matcher_t *filter)
+{
+ int status;
+ assert(m->type == MATCHER_CMP_GT);
+ status = cmp_expr(CMP_M(m)->left, CMP_M(m)->right, obj, filter);
+ return (status != INT_MAX) && (status > 0);
+} /* match_cmp_gt */
+
static int
match_isnull(sdb_store_matcher_t *m, sdb_store_obj_t *obj,
sdb_store_matcher_t *filter)
match_eq,
match_ge,
match_gt,
+ match_cmp_lt,
+ match_cmp_le,
+ match_cmp_eq,
+ match_cmp_ge,
+ match_cmp_gt,
match_isnull,
};
return buf;
} /* op_tostring */
+static int
+cmp_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ M(obj)->type = va_arg(ap, int);
+
+ CMP_M(obj)->left = va_arg(ap, sdb_store_expr_t *);
+ sdb_object_ref(SDB_OBJ(CMP_M(obj)->left));
+ CMP_M(obj)->right = va_arg(ap, sdb_store_expr_t *);
+ sdb_object_ref(SDB_OBJ(CMP_M(obj)->right));
+
+ if ((! CMP_M(obj)->left) || (! CMP_M(obj)->right))
+ return -1;
+ return 0;
+} /* cmp_matcher_init */
+
+static void
+cmp_matcher_destroy(sdb_object_t *obj)
+{
+ sdb_object_deref(SDB_OBJ(CMP_M(obj)->left));
+ sdb_object_deref(SDB_OBJ(CMP_M(obj)->right));
+} /* cmp_matcher_destroy */
+
+static char *
+cmp_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
+{
+ if (! m) {
+ /* this should not happen */
+ snprintf(buf, buflen, "()");
+ return buf;
+ }
+
+ /* TODO */
+ snprintf(buf, buflen, "CMP_MATCHER(%d)", m->type);
+ return buf;
+} /* cmp_tostring */
+
static int
uop_matcher_init(sdb_object_t *obj, va_list ap)
{
/* destroy = */ uop_matcher_destroy,
};
+static sdb_type_t cmp_type = {
+ /* size = */ sizeof(cmp_matcher_t),
+ /* init = */ cmp_matcher_init,
+ /* destroy = */ cmp_matcher_destroy,
+};
+
static sdb_type_t isnull_type = {
/* size = */ sizeof(isnull_matcher_t),
/* init = */ isnull_matcher_init,
cond_tostring,
cond_tostring,
cond_tostring,
+ cmp_tostring,
+ cmp_tostring,
+ cmp_tostring,
+ cmp_tostring,
+ cmp_tostring,
isnull_tostring,
};
MATCHER_GT, cond));
} /* sdb_store_gt_matcher */
+/*
+ * TODO: Rename sdb_store_cmp_* to sdb_store_* once the old code is unused and
+ * has been removed.
+ */
+
+sdb_store_matcher_t *
+sdb_store_cmp_lt(sdb_store_expr_t *left, sdb_store_expr_t *right)
+{
+ return M(sdb_object_create("lt-matcher", cmp_type,
+ MATCHER_CMP_LT, left, right));
+} /* sdb_store_cmp_lt */
+
+sdb_store_matcher_t *
+sdb_store_cmp_le(sdb_store_expr_t *left, sdb_store_expr_t *right)
+{
+ return M(sdb_object_create("le-matcher", cmp_type,
+ MATCHER_CMP_LE, left, right));
+} /* sdb_store_cmp_le */
+
+sdb_store_matcher_t *
+sdb_store_cmp_eq(sdb_store_expr_t *left, sdb_store_expr_t *right)
+{
+ return M(sdb_object_create("eq-matcher", cmp_type,
+ MATCHER_CMP_EQ, left, right));
+} /* sdb_store_cmp_eq */
+
+sdb_store_matcher_t *
+sdb_store_cmp_ge(sdb_store_expr_t *left, sdb_store_expr_t *right)
+{
+ return M(sdb_object_create("ge-matcher", cmp_type,
+ MATCHER_CMP_GE, left, right));
+} /* sdb_store_cmp_ge */
+
+sdb_store_matcher_t *
+sdb_store_cmp_gt(sdb_store_expr_t *left, sdb_store_expr_t *right)
+{
+ return M(sdb_object_create("gt-matcher", cmp_type,
+ MATCHER_CMP_GT, left, right));
+} /* sdb_store_cmp_gt */
+
sdb_store_matcher_t *
sdb_store_isnull_matcher(const char *attr_name)
{