reduce code complexity

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/mds-server/interceptors.h b/src/mds-server/interceptors.h
new file mode 100644
index 0000000..06c76e1
--- /dev/null
+++ b/src/mds-server/interceptors.h
@@ -0,0 +1,86 @@
+/**
+ * mds — A micro-display server
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef MDS_MDS_SERVER_INTERCEPTORS_H
+#define MDS_MDS_SERVER_INTERCEPTORS_H
+
+
+#include "interception_condition.h"
+#include "client.h"
+#include "queued_interception.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+
+/**
+ * Add an interception condition for a client
+ * 
+ * @param  client     The client
+ * @param  condition  The header, optionally with value, to look for, or empty (not NULL) for all messages
+ * @param  priority   Interception priority
+ * @param  modifying  Whether the client may modify the messages
+ * @param  stop       Whether the condition should be removed rather than added
+ */
+void add_intercept_condition(client_t* client, char* condition, int64_t priority, int modifying, int stop);
+
+
+/**
+ * Check if a condition matches any of a set of accepted patterns
+ * 
+ * @param   cond     The condition
+ * @param   hashes   The hashes of the accepted header names
+ * @param   keys     The header names
+ * @param   headers  The header name–value pairs
+ * @param   count    The number of accepted patterns
+ * @return           Evaluates to true if and only if a matching pattern was found
+ */
+int is_condition_matching(interception_condition_t* cond, size_t* hashes,
+			  char** keys, char** headers, size_t count) __attribute__((pure));
+
+
+/**
+ * Find a matching condition to any of a set of acceptable conditions
+ * 
+ * @param   client            The intercepting client
+ * @param   hashes            The hashes of the accepted header names
+ * @param   keys              The header names
+ * @param   headers           The header name–value pairs
+ * @param   count             The number of accepted patterns
+ * @param   interception_out  Storage slot for found interception
+ * @return                    -1 on error, otherwise: evalutes to true iff a matching condition was found
+ */
+int find_matching_condition(client_t* client, size_t* hashes, char** keys, char** headers,
+			    size_t count, queued_interception_t* interception_out);
+
+
+/**
+ * Get all interceptors who have at least one condition matching any of a set of acceptable patterns
+ * 
+ * @param   sender                   The original sender of the message
+ * @param   hashes                   The hashes of the accepted header names
+ * @param   keys                     The header names
+ * @param   headers                  The header name–value pairs
+ * @param   count                    The number of accepted patterns
+ * @param   interceptions_count_out  Slot at where to store the number of found interceptors
+ * @return                           The found interceptors, NULL on error
+ */
+queued_interception_t* get_interceptors(client_t* sender, size_t* hashes, char** keys, char** headers,
+					size_t count, size_t* interceptions_count_out);
+
+#endif
+