X-Git-Url: http://git.madism.org/?a=blobdiff_plain;f=postlicyd%2Ffilter.h;h=dcbaecbaba41c4c0dc581b091fdff220c5c5f53b;hb=e327d3786ba0371eaaff8e6ba0fe3fc39f095ae2;hp=50378683fcf9e6016f18ec59d543063ba237230d;hpb=dd53acce112e59a9ba35e3389c9bad4ea81480ca;p=apps%2Fpfixtools.git diff --git a/postlicyd/filter.h b/postlicyd/filter.h index 5037868..dcbaecb 100644 --- a/postlicyd/filter.h +++ b/postlicyd/filter.h @@ -43,6 +43,7 @@ #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; @@ -51,17 +52,21 @@ typedef struct filter_hook_t { filter_result_t type; char *value; - bool postfix; + unsigned postfix:1; + unsigned async:1; int filter_id; } filter_hook_t; ARRAY(filter_hook_t) -typedef struct filter_params_t { +typedef struct filter_param_t { filter_param_id_t type; - char *value; -} filter_params_t; -ARRAY(filter_params_t) + 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; @@ -69,11 +74,26 @@ typedef struct filter_t { 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 } +/** Context of the query. To be filled with data to use when + * performing asynchronous filtering. + */ +typedef struct filter_context_t { + const filter_t *current_filter; + void *contexts[FTK_count]; + + 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") @@ -84,14 +104,34 @@ ARRAY(filter_t) 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); @@ -99,6 +139,12 @@ 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) { @@ -107,24 +153,24 @@ 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; @@ -147,6 +193,9 @@ static inline int filter_find_with_name(A(filter_t) *array, const char *name) __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) { @@ -154,7 +203,7 @@ 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->value); } @@ -162,8 +211,69 @@ static inline void filter_params_wipe(filter_params_t *param) __attribute__((nonnull(1))) void filter_wipe(filter_t *filter); + +/* Runner. + */ + +__attribute__((nonnull(1,2))) +const filter_hook_t *filter_run(const filter_t *filter, const query_t *query, + filter_context_t *context); + __attribute__((nonnull(1,2))) -filter_result_t filter_run(const filter_t *filter, const query_t *query); +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') { \ + (Dest) = ascii_tolower(param->value[1]) == 'r' \ + && ascii_tolower(param->value[2]) == 'u' \ + && ascii_tolower(param->value[3]) == 'e'; \ + } else if (param->value_len == 5 \ + && ascii_tolower(param->value[0]) == 'f') { \ + (Dest) = ascii_tolower(param->value[1]) == 'a' \ + && ascii_tolower(param->value[2]) == 'l' \ + && ascii_tolower(param->value[3]) == 's' \ + && ascii_tolower(param->value[4]) == 'e'; \ + } 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_post_async_result(filter_context_t *context, filter_result_t result); #endif