static filter_runner_t runners[FTK_count];
static filter_constructor_t constructors[FTK_count];
static filter_destructor_t destructors[FTK_count];
+static bool hooks[FTK_count][HTK_count];
+static bool params[FTK_count][ATK_count];
-void filter_register(const char *type, filter_constructor_t constructor,
- filter_destructor_t destructor, filter_runner_t runner)
+static const filter_hook_t default_hook = {
+ .type = 0,
+ .value = (char*)"DUNNO",
+ .postfix = true,
+ .filter_id = 0
+};
+
+filter_type_t filter_register(const char *type, filter_constructor_t constructor,
+ filter_destructor_t destructor, filter_runner_t runner)
{
filter_token tok = filter_tokenize(type, m_strlen(type));
- assert(tok != FTK_UNKNOWN && "Unknown filter type");
+ CHECK_FILTER(tok);
+
+ syslog(LOG_DEBUG, "filter type %s registered", type);
+
runners[tok] = runner;
constructors[tok] = constructor;
destructors[tok] = destructor;
+ return tok;
+}
+
+filter_result_t filter_hook_register(filter_type_t filter,
+ const char *name)
+{
+ filter_result_t tok = hook_tokenize(name, m_strlen(name));
+ CHECK_FILTER(filter);
+ CHECK_HOOK(tok);
+
+ syslog(LOG_DEBUG, "hook %s registered for filter type %s", name,
+ ftokens[filter]);
+
+ hooks[filter][tok] = true;
+ return tok;
+}
+
+filter_param_id_t filter_param_register(filter_type_t filter,
+ const char *name)
+{
+ filter_param_id_t tok = param_tokenize(name, m_strlen(name));
+ CHECK_FILTER(filter);
+ CHECK_PARAM(tok);
+
+ syslog(LOG_INFO, "param %s registered for filter type %s", name,
+ ftokens[filter]);
+
+ params[filter][tok] = true;
+ return tok;
}
bool filter_build(filter_t *filter)
{
+ bool ret = true;
if (filter->type == FTK_UNKNOWN || filter->name == NULL) {
return false;
}
+ if (filter->hooks.len > 0) {
+# define QSORT_TYPE filter_hook_t
+# define QSORT_BASE filter->hooks.data
+# define QSORT_NELT filter->hooks.len
+# define QSORT_LT(a,b) a->type < b->type
+# include "qsort.c"
+ }
filter_constructor_t constructor = constructors[filter->type];
if (constructor) {
- return constructor(filter);
+ ret = constructor(filter);
}
+ array_deep_wipe(filter->params, filter_params_wipe);
+ return ret;
+}
+
+bool filter_update_references(filter_t *filter, A(filter_t) *filter_list)
+{
+ foreach (filter_hook_t *hook, filter->hooks) {
+ if (!hook->postfix) {
+ hook->filter_id = filter_find_with_name(filter_list, hook->value);
+ if (hook->filter_id == -1) {
+ syslog(LOG_ERR, "invalid filter name %s for hook %s",
+ hook->value, htokens[hook->type]);
+ return false;
+ }
+ p_delete(&hook->value);
+ }
+ }}
+ return true;
+}
+
+static inline bool filter_check_loop(filter_t *filter, A(filter_t) *array, bool cleanup)
+{
+ if (cleanup) {
+ foreach (filter_t *filter2, *array) {
+ filter2->seen = false;
+ }}
+ } else if (filter->seen) {
+ return false;
+ }
+ if (filter->safe) {
+ return true;
+ }
+ filter->seen = true;
+ foreach (filter_hook_t *hook, filter->hooks) {
+ if (hook->postfix) {
+ continue;
+ }
+ if (!filter_check_loop(array_ptr(*array, hook->filter_id), array, false)) {
+ return false;
+ }
+ }}
+ filter->safe = true;
+ return true;
+}
+
+bool filter_check_safety(A(filter_t) *array)
+{
+ foreach (filter_t *filter, *array) {
+ if (!filter_check_loop(filter, array, true)) {
+ syslog(LOG_ERR, "the filter tree contains a loop");
+ return false;
+ }
+ }}
return true;
}
p_delete(&filter->name);
}
-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)
{
- return runners[filter->type](filter, query);
+ int start = 0;
+ int end = filter->hooks.len;
+ //syslog(LOG_DEBUG, "running filter %s (%s)",
+ // filter->name, ftokens[filter->type]);
+ filter_result_t res = runners[filter->type](filter, query);
+
+ if (res == HTK_ABORT) {
+ return NULL;
+ }
+ //syslog(LOG_DEBUG, "filter run, result is %s", htokens[res]);
+
+ while (start < end) {
+ int mid = (start + end) / 2;
+ filter_hook_t *hook = array_ptr(filter->hooks, mid);
+ if (hook->type == res) {
+ //syslog(LOG_DEBUG, "return hook of type %s, value %s",
+ // htokens[hook->type], hook->value);
+ return hook;
+ } else if (res < hook->type) {
+ end = mid;
+ } else {
+ start = mid + 1;
+ }
+ }
+ syslog(LOG_WARNING, "missing hook %s for filter %s",
+ htokens[res], filter->name);
+ return &default_hook;
}
void filter_set_name(filter_t *filter, const char *name, ssize_t len)
{
- filter->name = p_new(char, len + 1);
- memcpy(filter->name, name, len);
- filter->name[len] = '\0';
+ filter->name = p_dupstr(name, len);
}
bool filter_set_type(filter_t *filter, const char *type, ssize_t len)
bool filter_add_param(filter_t *filter, const char *name, ssize_t name_len,
const char *value, ssize_t value_len)
{
- filter_params_t param;
- param.name = strdup(name);
- param.value = strdup(value);
+ filter_param_t param;
+ param.type = param_tokenize(name, name_len);
+ if (param.type == ATK_UNKNOWN) {
+ syslog(LOG_ERR, "unknown parameter %.*s", name_len, name);
+ return false;
+ }
+ if (!params[filter->type][param.type]) {
+ syslog(LOG_ERR, "hook %s is not valid for filter %s",
+ atokens[param.type], ftokens[filter->type]);
+ return false;
+ }
+ param.value = p_dupstr(value, value_len);
+ param.value_len = value_len;
array_add(filter->params, param);
return true;
}
const char *value, ssize_t value_len)
{
filter_hook_t hook;
- hook.name = strdup(name);
- hook.value = strdup(value);
+ hook.type = hook_tokenize(name, name_len);
+ if (hook.type == HTK_UNKNOWN) {
+ syslog(LOG_ERR, "unknown hook type %.*s", name_len, name);
+ return false;
+ }
+ if (!hooks[filter->type][hook.type] || hook.type == HTK_ABORT) {
+ syslog(LOG_ERR, "hook %s not is valid for filter %s",
+ htokens[hook.type], ftokens[filter->type]);
+ return false;
+ }
+ hook.postfix = (strncmp(value, "postfix:", 8) == 0);
+ hook.value = m_strdup(hook.postfix ? value + 8 : value);
+ hook.filter_id = -1;
array_add(filter->hooks, hook);
return true;
}
projects / apps / pfixtools.git / blobdiff