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index fa7a8dad7d98a1bb35ca28fb1b896131ee1f13a7..3920b80127c5a228792b299e06bc5e6e51f1187b 100644 (file)
--- a/src/core/store_lookup.c
+++ b/src/core/store_lookup.c
#include <stdlib.h>
#include <string.h>
+#include <limits.h>
+
/*
* private data types
*/
return attr;
} /* attr_get */
+/*
+ * conditional implementations
+ */
+
+static int
+attr_cmp(sdb_store_base_t *obj, sdb_store_cond_t *cond)
+{
+ sdb_attribute_t *attr;
+
+ attr = SDB_ATTR(attr_get(obj, ATTR_C(cond)->name));
+ if (! attr)
+ return INT_MAX;
+ if (attr->value.type != ATTR_C(cond)->value.type)
+ return INT_MAX;
+ return sdb_data_cmp(&attr->value, &ATTR_C(cond)->value);
+} /* attr_cmp */
+
/*
* matcher implementations
*/
return 0;
} /* match_attr */
+static int
+match_lt(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ int status;
+ assert(m->type == MATCHER_LT);
+ status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond);
+ return (status != INT_MAX) && (status < 0);
+} /* match_lt */
+
+static int
+match_le(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ int status;
+ assert(m->type == MATCHER_LE);
+ status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond);
+ return (status != INT_MAX) && (status <= 0);
+} /* match_le */
+
+static int
+match_eq(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ int status;
+ assert(m->type == MATCHER_EQ);
+ status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond);
+ return (status != INT_MAX) && (! status);
+} /* match_eq */
+
+static int
+match_ge(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ int status;
+ assert(m->type == MATCHER_GE);
+ status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond);
+ return (status != INT_MAX) && (status >= 0);
+} /* match_ge */
+
+static int
+match_gt(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ int status;
+ assert(m->type == MATCHER_GT);
+ status = COND_M(m)->cond->cmp(obj, COND_M(m)->cond);
+ return (status != INT_MAX) && (status > 0);
+} /* match_gt */
+
typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_base_t *);
/* this array needs to be indexable by the matcher types;
match_unary,
match_name,
match_attr,
+ match_lt,
+ match_le,
+ match_eq,
+ match_ge,
+ match_gt,
+};
+
+/*
+ * private conditional types
+ */
+
+static int
+attr_cond_init(sdb_object_t *obj, va_list ap)
+{
+ const char *name = va_arg(ap, const char *);
+ const sdb_data_t *value = va_arg(ap, const sdb_data_t *);
+
+ if (! name)
+ return -1;
+
+ SDB_STORE_COND(obj)->cmp = attr_cmp;
+
+ ATTR_C(obj)->name = strdup(name);
+ if (! ATTR_C(obj)->name)
+ return -1;
+ if (sdb_data_copy(&ATTR_C(obj)->value, value))
+ return -1;
+ return 0;
+} /* attr_cond_init */
+
+static void
+attr_cond_destroy(sdb_object_t *obj)
+{
+ if (ATTR_C(obj)->name)
+ free(ATTR_C(obj)->name);
+ sdb_data_free_datum(&ATTR_C(obj)->value);
+} /* attr_cond_destroy */
+
+static sdb_type_t attr_cond_type = {
+ /* size = */ sizeof(attr_cond_t),
+ /* init = */ attr_cond_init,
+ /* destroy = */ attr_cond_destroy,
};
/*
return buf;
} /* attr_tostring */
+static int
+cond_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ int type = va_arg(ap, int);
+ sdb_store_cond_t *cond = va_arg(ap, sdb_store_cond_t *);
+
+ if (! cond)
+ return -1;
+
+ sdb_object_ref(SDB_OBJ(cond));
+
+ M(obj)->type = type;
+ COND_M(obj)->cond = cond;
+ return 0;
+} /* cond_matcher_init */
+
+static void
+cond_matcher_destroy(sdb_object_t *obj)
+{
+ sdb_object_deref(SDB_OBJ(COND_M(obj)->cond));
+} /* cond_matcher_destroy */
+
+static char *
+cond_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen)
+{
+ if (COND_M(m)->cond->cmp == attr_cmp) {
+ char value[buflen];
+ if (sdb_data_format(&ATTR_C(COND_M(m)->cond)->value,
+ value, sizeof(value), SDB_SINGLE_QUOTED) < 0)
+ snprintf(value, sizeof(value), "ERR");
+ snprintf(buf, buflen, "ATTR[%s]{ %s %s }",
+ ATTR_C(COND_M(m)->cond)->name, MATCHER_SYM(m->type), value);
+ }
+ return buf;
+} /* cond_tostring */
+
static int
op_matcher_init(sdb_object_t *obj, va_list ap)
{
/* destroy = */ attr_matcher_destroy,
};
+static sdb_type_t cond_type = {
+ /* size = */ sizeof(cond_matcher_t),
+ /* init = */ cond_matcher_init,
+ /* destroy = */ cond_matcher_destroy,
+};
+
static sdb_type_t op_type = {
/* size = */ sizeof(op_matcher_t),
/* init = */ op_matcher_init,
uop_tostring,
name_tostring,
attr_tostring,
+ cond_tostring,
+ cond_tostring,
+ cond_tostring,
+ cond_tostring,
+ cond_tostring,
};
/*
* public API
*/
+sdb_store_cond_t *
+sdb_store_attr_cond(const char *name, const sdb_data_t *value)
+{
+ return SDB_STORE_COND(sdb_object_create("attr-cond", attr_cond_type,
+ name, value));
+} /* sdb_store_attr_cond */
+
sdb_store_matcher_t *
sdb_store_name_matcher(int type, const char *name, _Bool re)
{
name, value, NULL));
} /* sdb_store_attr_matcher */
+sdb_store_matcher_t *
+sdb_store_lt_matcher(sdb_store_cond_t *cond)
+{
+ return M(sdb_object_create("lt-matcher", cond_type,
+ MATCHER_LT, cond));
+} /* sdb_store_lt_matcher */
+
+sdb_store_matcher_t *
+sdb_store_le_matcher(sdb_store_cond_t *cond)
+{
+ return M(sdb_object_create("le-matcher", cond_type,
+ MATCHER_LE, cond));
+} /* sdb_store_le_matcher */
+
+sdb_store_matcher_t *
+sdb_store_eq_matcher(sdb_store_cond_t *cond)
+{
+ return M(sdb_object_create("eq-matcher", cond_type,
+ MATCHER_EQ, cond));
+} /* sdb_store_eq_matcher */
+
+sdb_store_matcher_t *
+sdb_store_ge_matcher(sdb_store_cond_t *cond)
+{
+ return M(sdb_object_create("ge-matcher", cond_type,
+ MATCHER_GE, cond));
+} /* sdb_store_ge_matcher */
+
+sdb_store_matcher_t *
+sdb_store_gt_matcher(sdb_store_cond_t *cond)
+{
+ return M(sdb_object_create("gt-matcher", cond_type,
+ MATCHER_GT, cond));
+} /* sdb_store_gt_matcher */
+
+static sdb_store_matcher_t *
+parse_attr_cmp(const char *attr, const char *op, const sdb_data_t *value)
+{
+ sdb_store_matcher_t *(*matcher)(sdb_store_cond_t *) = NULL;
+ sdb_store_matcher_t *m;
+ sdb_store_cond_t *cond;
+ _Bool inv = 0;
+
+ /* TODO: this will reject any attributes called "name";
+ * use a different syntax for querying objects by name */
+ if (! strcasecmp(attr, "name"))
+ return NULL;
+
+ if (! strcasecmp(op, "<"))
+ matcher = sdb_store_lt_matcher;
+ else if (! strcasecmp(op, "<="))
+ matcher = sdb_store_le_matcher;
+ else if (! strcasecmp(op, "="))
+ matcher = sdb_store_eq_matcher;
+ else if (! strcasecmp(op, ">="))
+ matcher = sdb_store_ge_matcher;
+ else if (! strcasecmp(op, ">"))
+ matcher = sdb_store_gt_matcher;
+ else if (! strcasecmp(op, "!=")) {
+ matcher = sdb_store_eq_matcher;
+ inv = 1;
+ }
+ else
+ return NULL;
+
+ cond = sdb_store_attr_cond(attr, value);
+ if (! cond)
+ return NULL;
+
+ m = matcher(cond);
+ /* pass ownership to 'm' or destroy in case of an error */
+ sdb_object_deref(SDB_OBJ(cond));
+ if (! m)
+ return NULL;
+
+ if (inv) {
+ sdb_store_matcher_t *tmp;
+ tmp = sdb_store_inv_matcher(m);
+ /* pass ownership to the inverse matcher */
+ sdb_object_deref(SDB_OBJ(m));
+ m = tmp;
+ }
+ return m;
+} /* parse_attr_cmp */
+
sdb_store_matcher_t *
sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
- const char *op, const char *value)
+ const char *op, const sdb_data_t *value)
{
int type = -1;
_Bool inv = 0;
type = SDB_SERVICE;
else if (! strcasecmp(obj_type, "attribute"))
type = SDB_ATTRIBUTE;
+ else
+ return NULL;
- /* TODO: support other operators */
+ /* XXX: this code sucks! */
if (! strcasecmp(op, "=")) {
/* nothing to do */
}
inv = 1;
re = 1;
}
+ else if (type == SDB_ATTRIBUTE)
+ return parse_attr_cmp(attr, op, value);
else
return NULL;
+ if (value->type != SDB_TYPE_STRING) {
+ if (type == SDB_ATTRIBUTE)
+ return parse_attr_cmp(attr, op, value);
+ return NULL;
+ }
+
if (! strcasecmp(attr, "name"))
- m = sdb_store_name_matcher(type, value, re);
+ m = sdb_store_name_matcher(type, value->data.string, re);
else if (type == SDB_ATTRIBUTE)
- m = sdb_store_attr_matcher(attr, value, re);
+ m = sdb_store_attr_matcher(attr, value->data.string, re);
if (! m)
return NULL;