#include "common.h"
#include "filter_tokens.h"
#include "hook_tokens.h"
+#include "param_tokens.h"
#include "query.h"
#include "array.h"
+
typedef filter_token filter_type_t;
typedef hook_token filter_result_t;
+typedef param_token filter_param_id_t;
typedef struct filter_hook_t {
filter_result_t type;
char *value;
- bool postfix;
+ int counter;
+ int cost;
+
+ unsigned postfix:1;
+ unsigned async:1;
int filter_id;
+
} filter_hook_t;
ARRAY(filter_hook_t)
-typedef struct filter_params_t {
- char *name;
- char *value;
-} filter_params_t;
-ARRAY(filter_params_t)
+typedef struct filter_param_t {
+ filter_param_id_t type;
+ char *value;
+ int value_len;
+} filter_param_t;
+ARRAY(filter_param_t)
+/** Description of a filter.
+ */
typedef struct filter_t {
char *name;
filter_type_t type;
A(filter_hook_t) hooks;
void *data;
- A(filter_params_t) params;
+ A(filter_param_t) params;
+
+ /* Loop checking flags.
+ */
+ int last_seen;
} filter_t;
ARRAY(filter_t)
-#define FILTER_INIT { NULL, FTK_UNKNOWN, ARRAY_INIT, NULL, ARRAY_INIT }
+#define MAX_COUNTERS (64)
+
+/** Context of the query. To be filled with data to use when
+ * performing asynchronous filtering.
+ */
+typedef struct filter_context_t {
+ /* filter context
+ */
+ const filter_t *current_filter;
+ void *contexts[FTK_count];
+
+ /* message context
+ */
+ char instance[64];
+ uint32_t counters[MAX_COUNTERS];
+
+ /* connection context
+ */
+ void *data;
+} filter_context_t;
+
+
+#define FILTER_INIT { NULL, FTK_UNKNOWN, ARRAY_INIT, NULL, ARRAY_INIT, -1 }
#define CHECK_FILTER(Filter) \
assert(Filter != FTK_UNKNOWN && Filter != FTK_count \
&& "Unknown filter type")
#define CHECK_HOOK(Hook) \
assert(Hook != HTK_UNKNOWN && Hook != HTK_count \
&& "Unknown hook")
+#define CHECK_PARAM(Param) \
+ assert(Param != ATK_UNKNOWN && Param != ATK_count \
+ && "Unknown param")
+
+
+/* Callback to be implemented by a filter.
+ */
typedef filter_result_t (*filter_runner_t)(const filter_t *filter,
- const query_t *query);
+ const query_t *query,
+ filter_context_t *context);
typedef bool (*filter_constructor_t)(filter_t *filter);
typedef void (*filter_destructor_t)(filter_t *filter);
+typedef void *(*filter_context_constructor_t)(void);
+typedef void (*filter_context_destructor_t)(void*);
+
+typedef void (*filter_async_handler_t)(filter_context_t *context,
+ const filter_hook_t *result);
+
+/** Number of filter currently running.
+ */
+extern uint32_t filter_running;
+
+/* Registration.
+ */
+
__attribute__((nonnull(1,4)))
filter_type_t filter_register(const char *type, filter_constructor_t constructor,
- filter_destructor_t destructor, filter_runner_t runner);
+ filter_destructor_t destructor, filter_runner_t runner,
+ filter_context_constructor_t context_constructor,
+ filter_context_destructor_t context_destructor);
__attribute__((nonnull(2)))
filter_result_t filter_hook_register(filter_type_t filter, const char *name);
+__attribute__((nonnull(2)))
+filter_param_id_t filter_param_register(filter_type_t filter, const char *name);
+
+__attribute__((nonnull))
+void filter_async_handler_register(filter_async_handler_t handler);
+
+/* Filter builder.
+ */
+
__attribute__((nonnull(1)))
static inline void filter_init(filter_t *filter)
{
}
__attribute__((nonnull(1,2)))
-void filter_set_name(filter_t *filter, const char *name, ssize_t len);
+void filter_set_name(filter_t *filter, const char *name, int len);
__attribute__((nonnull(1,2)))
-bool filter_set_type(filter_t *filter, const char *type, ssize_t len);
+bool filter_set_type(filter_t *filter, const char *type, int len);
__attribute__((nonnull(1,2,4)))
-bool filter_add_param(filter_t *filter, const char *name, ssize_t name_len,
- const char *value, ssize_t value_len);
+bool filter_add_param(filter_t *filter, const char *name, int name_len,
+ const char *value, int value_len);
__attribute__((nonnull(1,2,4)))
-bool filter_add_hook(filter_t *filter, const char *name, ssize_t name_len,
- const char *value, ssize_t value_len);
+bool filter_add_hook(filter_t *filter, const char *name, int name_len,
+ const char *value, int value_len);
__attribute__((nonnull(1)))
bool filter_build(filter_t *filter);
__attribute__((nonnull(1,2)))
-static inline int filter_find_with_name(A(filter_t) *array, const char *name)
+static inline int filter_find_with_name(const A(filter_t) *array, const char *name)
{
int start = 0;
int end = array->len;
__attribute__((nonnull(1,2)))
bool filter_update_references(filter_t *filter, A(filter_t) *array);
+__attribute__((nonnull(1)))
+bool filter_check_safety(A(filter_t) *array);
+
__attribute__((nonnull(1)))
static inline void filter_hook_wipe(filter_hook_t *hook)
{
}
__attribute__((nonnull(1)))
-static inline void filter_params_wipe(filter_params_t *param)
+static inline void filter_params_wipe(filter_param_t *param)
{
- p_delete(¶m->name);
p_delete(¶m->value);
}
__attribute__((nonnull(1)))
void filter_wipe(filter_t *filter);
+
+/* Runner.
+ */
+
__attribute__((nonnull(1,2)))
-filter_result_t filter_run(const filter_t *filter, const query_t *query);
+const filter_hook_t *filter_run(const filter_t *filter, const query_t *query,
+ filter_context_t *context);
+
+__attribute__((nonnull(1,2)))
+bool filter_test(const filter_t *filter, const query_t *query,
+ filter_context_t *context, filter_result_t expt);
+
+
+/* Parsing Helpers
+ */
+
+#define FILTER_PARAM_PARSE_STRING(Param, Dest) \
+ case ATK_ ## Param: { \
+ (Dest) = param->value; \
+ } break
+
+#define FILTER_PARAM_PARSE_INT(Param, Dest) \
+ case ATK_ ## Param: { \
+ char *next; \
+ (Dest) = strtol(param->value, &next, 10); \
+ PARSE_CHECK(!*next, "invalid %s value %.*s", atokens[ATK_ ## Param], \
+ param->value_len, param->value); \
+ } break
+
+#define FILTER_PARAM_PARSE_BOOLEAN(Param, Dest) \
+ case ATK_ ## Param: { \
+ if (param->value_len == 1 && param->value[0] == '1') { \
+ (Dest) = true; \
+ } else if (param->value_len == 1 && param->value[0] == '0') { \
+ (Dest) = false; \
+ } else if (param->value_len == 4 \
+ && ascii_tolower(param->value[0]) == 't' \
+ && ascii_tolower(param->value[1]) == 'r' \
+ && ascii_tolower(param->value[2]) == 'u' \
+ && ascii_tolower(param->value[3]) == 'e') { \
+ (Dest) = true; \
+ } else if (param->value_len == 5 \
+ && ascii_tolower(param->value[0]) == 'f' \
+ && ascii_tolower(param->value[1]) == 'a' \
+ && ascii_tolower(param->value[2]) == 'l' \
+ && ascii_tolower(param->value[3]) == 's' \
+ && ascii_tolower(param->value[4]) == 'e') { \
+ (Dest) = false; \
+ } else { \
+ PARSE_CHECK(false, "invalid %s value %.*s", atokens[ATK_ ## Param],\
+ param->value_len, param->value); \
+ } \
+ } break
+
+
+/* Filter context
+ */
+
+__attribute__((nonnull(1)))
+void filter_context_prepare(filter_context_t *context, void* qctx);
+
+__attribute__((nonnull))
+void filter_context_wipe(filter_context_t *context);
+
+__attribute__((nonnull))
+void filter_context_clean(filter_context_t *context);
+__attribute__((nonnull))
+void filter_post_async_result(filter_context_t *context, filter_result_t result);
#endif
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