database: Load networks from database

[people/ms/libloc.git] / src / database.c

diff --git a/src/database.c b/src/database.c
index b1eead619bcd09af5bd85c520960b2e504707afc..f789c690b0a16791e22e17ccf644c791589665a7 100644 (file)
--- a/src/database.c
+++ b/src/database.c
@@ -50,6 +50,10 @@ struct loc_database {
        struct loc_database_network_node_v0* network_nodes_v0;
        size_t network_nodes_count;
 
+       // Networks
+       struct loc_database_network_v0* networks_v0;
+       size_t networks_count;
+
        struct loc_stringpool* pool;
 };
 
@@ -84,7 +88,10 @@ static int loc_database_read_magic(struct loc_database* db, FILE* f) {
 }
 
 static int loc_database_read_as_section_v0(struct loc_database* db,
-               FILE* f, off_t as_offset, size_t as_length) {
+               FILE* f, const struct loc_database_header_v0* header) {
+       off_t as_offset  = be32toh(header->as_offset);
+       size_t as_length = be32toh(header->as_length);
+
        DEBUG(db->ctx, "Reading AS section from %jd (%zu bytes)\n", as_offset, as_length);
 
        if (as_length > 0) {
@@ -103,7 +110,10 @@ static int loc_database_read_as_section_v0(struct loc_database* db,
 }
 
 static int loc_database_read_network_nodes_section_v0(struct loc_database* db,
-               FILE* f, off_t network_nodes_offset, size_t network_nodes_length) {
+               FILE* f, const struct loc_database_header_v0* header) {
+       off_t network_nodes_offset  = be32toh(header->network_tree_offset);
+       size_t network_nodes_length = be32toh(header->network_tree_length);
+
        DEBUG(db->ctx, "Reading network nodes section from %jd (%zu bytes)\n",
                network_nodes_offset, network_nodes_length);
 
@@ -122,6 +132,29 @@ static int loc_database_read_network_nodes_section_v0(struct loc_database* db,
        return 0;
 }
 
+static int loc_database_read_networks_section_v0(struct loc_database* db,
+               FILE* f, const struct loc_database_header_v0* header) {
+       off_t networks_offset  = be32toh(header->network_data_offset);
+       size_t networks_length = be32toh(header->network_data_length);
+
+       DEBUG(db->ctx, "Reading networks section from %jd (%zu bytes)\n",
+               networks_offset, networks_length);
+
+       if (networks_length > 0) {
+               db->networks_v0 = mmap(NULL, networks_length, PROT_READ,
+                       MAP_SHARED, fileno(f), networks_offset);
+
+               if (db->networks_v0 == MAP_FAILED)
+                       return -errno;
+       }
+
+       db->networks_count = networks_length / sizeof(*db->networks_v0);
+
+       INFO(db->ctx, "Read %zu networks from the database\n", db->networks_count);
+
+       return 0;
+}
+
 static int loc_database_read_header_v0(struct loc_database* db, FILE* f) {
        struct loc_database_header_v0 header;
 
@@ -148,19 +181,17 @@ static int loc_database_read_header_v0(struct loc_database* db, FILE* f) {
                return r;
 
        // AS section
-       off_t as_offset  = be32toh(header.as_offset);
-       size_t as_length = be32toh(header.as_length);
-
-       r = loc_database_read_as_section_v0(db, f, as_offset, as_length);
+       r = loc_database_read_as_section_v0(db, f, &header);
        if (r)
                return r;
 
        // Network Nodes
-       off_t network_nodes_offset  = be32toh(header.network_tree_offset);
-       size_t network_nodes_length = be32toh(header.network_tree_length);
+       r = loc_database_read_network_nodes_section_v0(db, f, &header);
+       if (r)
+               return r;
 
-       r = loc_database_read_network_nodes_section_v0(db, f,
-               network_nodes_offset, network_nodes_length);
+       // Networks
+       r = loc_database_read_networks_section_v0(db, f, &header);
        if (r)
                return r;