feat: column slice getters for tables (#404)

src/_macros.rs

@@ -1159,6 +1159,38 @@ macro_rules! optional_container_comparison {
     };
 }
 
+macro_rules! build_table_column_slice_getter {
+    ($(#[$attr:meta])* => $column: ident, $name: ident, $cast: ty) => {
+        $(#[$attr])*
+        pub fn $name(&self) -> &[$cast] {
+            // Caveat: num_rows is u64 but we need usize
+            // The conversion is fallible but unlikely.
+            let num_rows =
+                usize::try_from(self.num_rows()).expect("conversion of num_rows to usize failed");
+            let ptr = self.as_ref().$column as *const $cast;
+            // SAFETY: tables are initialzed, num rows comes
+            // from the C back end.
+            unsafe { std::slice::from_raw_parts(ptr, num_rows) }
+        }
+    };
+}
+
+macro_rules! build_table_column_slice_mut_getter {
+    ($(#[$attr:meta])* => $column: ident, $name: ident, $cast: ty) => {
+        $(#[$attr])*
+        pub fn $name(&mut self) -> &mut [$cast] {
+            // Caveat: num_rows is u64 but we need usize
+            // The conversion is fallible but unlikely.
+            let num_rows =
+                usize::try_from(self.num_rows()).expect("conversion of num_rows to usize failed");
+            let ptr = self.as_ref().$column as *mut $cast;
+            // SAFETY: tables are initialzed, num rows comes
+            // from the C back end.
+            unsafe { std::slice::from_raw_parts_mut(ptr, num_rows) }
+        }
+    };
+}
+
 #[cfg(test)]
 mod test {
     use crate::error::TskitError;

src/edge_table.rs

@@ -312,6 +312,31 @@ impl EdgeTable {
         };
         Some(view)
     }
+
+    build_table_column_slice_getter!(
+        /// Get the left column as a slice
+        => left, left_slice, Position);
+    build_table_column_slice_getter!(
+        /// Get the left column as a slice of [`f64`] 
+        => left, left_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the right column as a slice
+        => right, right_slice, Position);
+    build_table_column_slice_getter!(
+        /// Get the left column as a slice of [`f64`] 
+        => right, right_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the parent column as a slice
+        => parent, parent_slice, NodeId);
+    build_table_column_slice_getter!(
+        /// Get the parent column as a slice of [`crate::bindings::tsk_id_t`]
+        => parent, parent_slice_raw, ll_bindings::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the child column as a slice
+        => child, child_slice, NodeId);
+    build_table_column_slice_getter!(
+        /// Get the child column as a slice of [`crate::bindings::tsk_id_t`]
+        => child, child_slice_raw, ll_bindings::tsk_id_t);
 }
 
 build_owned_table_type!(

src/individual_table.rs

@@ -444,6 +444,13 @@ match tables.individuals().metadata::<MutationMetadata>(0.into())
         };
         Some(view)
     }
+
+    build_table_column_slice_getter!(
+        /// Get the flags column as a slice
+        => flags, flags_slice, IndividualFlags);
+    build_table_column_slice_getter!(
+        /// Get the flags column as a slice
+        => flags, flags_slice_raw, ll_bindings::tsk_flags_t);
 }
 
 build_owned_table_type!(

src/migration_table.rs

@@ -365,6 +365,43 @@ impl MigrationTable {
         };
         Some(view)
     }
+
+    build_table_column_slice_getter!(
+        /// Get the left column as a slice
+        => left, left_slice, Position);
+    build_table_column_slice_getter!(
+        /// Get the left column as a slice
+        => left, left_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the right column as a slice
+        => right, right_slice, Position);
+    build_table_column_slice_getter!(
+        /// Get the right column as a slice
+        => right, right_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice, Time);
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the node column as a slice
+        => node, node_slice, NodeId);
+    build_table_column_slice_getter!(
+        /// Get the node column as a slice
+        => node, node_slice_raw, ll_bindings::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the source column as a slice
+        => source, source_slice, PopulationId);
+    build_table_column_slice_getter!(
+        /// Get the source column as a slice
+        => source, source_slice_raw, ll_bindings::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the dest column as a slice
+        => dest, dest_slice, PopulationId);
+    build_table_column_slice_getter!(
+        /// Get the dest column as a slice
+        => dest, dest_slice_raw, ll_bindings::tsk_id_t);
 }
 
 build_owned_table_type!(

src/mutation_table.rs

@@ -344,6 +344,31 @@ impl MutationTable {
         };
         Some(view)
     }
+
+    build_table_column_slice_getter!(
+        /// Get the node column as a slice
+        => node, node_slice, NodeId);
+    build_table_column_slice_getter!(
+        /// Get the node column as a slice
+        => node, node_slice_raw, crate::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the site column as a slice
+        => site, site_slice, SiteId);
+    build_table_column_slice_getter!(
+        /// Get the site column as a slice
+        => site, site_slice_raw, crate::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice, Time);
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice_raw, f64);
+    build_table_column_slice_getter!(
+        /// Get the parent column as a slice
+        => parent, parent_slice, MutationId);
+    build_table_column_slice_getter!(
+        /// Get the parent column as a slice
+        => parent, parent_slice_raw, crate::tsk_id_t);
 }
 
 build_owned_table_type!(

src/node_table.rs

@@ -520,6 +520,43 @@ impl NodeTable {
             .map(|row| row.id)
             .collect::<Vec<_>>()
     }
+
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice, Time);
+    build_table_column_slice_getter!(
+        /// Get the time column as a slice
+        => time, time_slice_raw, f64);
+    build_table_column_slice_mut_getter!(
+        /// Get the time column as a mutable slice
+        => time, time_slice_mut, Time);
+    build_table_column_slice_mut_getter!(
+        /// Get the time column as a mutable slice
+        => time, time_slice_raw_mut, f64);
+    build_table_column_slice_getter!(
+        /// Get the flags column as a slice
+        => flags, flags_slice, NodeFlags);
+    build_table_column_slice_getter!(
+        /// Get the flags column as a slice
+        => flags, flags_slice_raw, ll_bindings::tsk_flags_t);
+    build_table_column_slice_mut_getter!(
+        /// Get the flags column as a mutable slice
+        => flags, flags_slice_mut, NodeFlags);
+    build_table_column_slice_mut_getter!(
+        /// Get the flags column as a mutable slice
+        => flags, flags_slice_raw_mut, ll_bindings::tsk_flags_t);
+    build_table_column_slice_getter!(
+        /// Get the individual column as a slice
+        => individual, individual_slice, IndividualId);
+    build_table_column_slice_getter!(
+        /// Get the individual column as a slice
+        => individual, individual_slice_raw, crate::tsk_id_t);
+    build_table_column_slice_getter!(
+        /// Get the population column as a slice
+        => population, population_slice, PopulationId);
+    build_table_column_slice_getter!(
+        /// Get the population column as a slice
+        => population, population_slice_raw, crate::tsk_id_t);
 }
 
 build_owned_table_type!(

src/site_table.rs

@@ -263,6 +263,13 @@ impl SiteTable {
         };
         Some(view)
     }
+
+    build_table_column_slice_getter!(
+        /// Get the position column as a slice
+        => position, position_slice, Position);
+    build_table_column_slice_getter!(
+        /// Get the position column as a slice
+        => position, position_slice_raw, f64);
 }
 
 build_owned_table_type!(

tests/test_tables.rs

@@ -71,18 +71,58 @@ mod test_adding_rows_without_metadata {
                     Err(e) => panic!("Err from tables.{}: {:?}", stringify!(adder), e)
                 }
                 assert_eq!(tables.$table().iter().count(), 2);
+                tables
             }
         }};
     }
 
+    macro_rules! compare_column_to_raw_column {
+        ($table: expr, $col: ident, $raw: ident) => {
+            assert_eq!(
+                $table.$col().len(),
+                usize::try_from($table.num_rows()).unwrap()
+            );
+            assert_eq!(
+                $table.$raw().len(),
+                usize::try_from($table.num_rows()).unwrap()
+            );
+            assert!($table
+                .$col()
+                .iter()
+                .zip($table.$raw().iter())
+                .all(|(a, b)| a == b))
+        };
+    }
+
+    macro_rules! compare_column_to_row {
+        ($table: expr, $col: ident, $target: ident) => {
+            assert!($table
+                .$col()
+                .iter()
+                .zip($table.iter())
+                .all(|(c, r)| c == &r.$target));
+        };
+    }
+
     // NOTE: all functions arguments for adding rows are Into<T>
     // where T is one of our new types.
     // Further, functions taking multiple inputs of T are defined
     // as X: Into<T>, X2: Into<T>, etc., allowing mix-and-match.
 
     #[test]
     fn test_adding_edge() {
-        add_row_without_metadata!(edges, add_edge, 0.1, 0.5, 0, 1); // left, right, parent, child
+        {
+            let tables = add_row_without_metadata!(edges, add_edge, 0.1, 0.5, 0, 1); // left, right, parent, child
+            compare_column_to_raw_column!(tables.edges(), left_slice, left_slice_raw);
+            compare_column_to_raw_column!(tables.edges(), right_slice, right_slice_raw);
+            compare_column_to_raw_column!(tables.edges(), parent_slice, parent_slice_raw);
+            compare_column_to_raw_column!(tables.edges(), child_slice, child_slice_raw);
+
+            compare_column_to_row!(tables.edges(), left_slice, left);
+            compare_column_to_row!(tables.edges(), right_slice, right);
+            compare_column_to_row!(tables.edges(), parent_slice, parent);
+            compare_column_to_row!(tables.edges(), child_slice, child);
+        }
         add_row_without_metadata!(edges, add_edge, tskit::Position::from(0.1), 0.5, 0, 1); // left, right, parent, child
         add_row_without_metadata!(edges, add_edge, 0.1, tskit::Position::from(0.5), 0, 1); // left, right, parent, child
         add_row_without_metadata!(
@@ -105,8 +145,30 @@ mod test_adding_rows_without_metadata {
 
     #[test]
     fn test_adding_node() {
-        add_row_without_metadata!(nodes, add_node, 0, 0.1, -1, -1); // flags, time, population,
-                                                                    // individual
+        {
+            let tables =
+                add_row_without_metadata!(nodes, add_node, tskit::TSK_NODE_IS_SAMPLE, 0.1, -1, -1); // flags, time, population,
+                                                                                                    // individual
+            assert!(tables
+                .nodes()
+                .flags_slice()
+                .iter()
+                .zip(tables.nodes().flags_slice_raw().iter())
+                .all(|(a, b)| a.bits() == *b));
+            compare_column_to_raw_column!(tables.nodes(), time_slice, time_slice_raw);
+            compare_column_to_raw_column!(tables.nodes(), population_slice, population_slice_raw);
+            compare_column_to_raw_column!(tables.nodes(), individual_slice, individual_slice_raw);
+
+            assert!(tables
+                .nodes()
+                .flags_slice()
+                .iter()
+                .zip(tables.nodes().iter())
+                .all(|(c, r)| c == &r.flags));
+            compare_column_to_row!(tables.nodes(), time_slice, time);
+            compare_column_to_row!(tables.nodes(), population_slice, population);
+            compare_column_to_row!(tables.nodes(), individual_slice, individual);
+        }
         add_row_without_metadata!(
             nodes,
             add_node,
@@ -120,7 +182,11 @@ mod test_adding_rows_without_metadata {
     #[test]
     fn test_adding_site() {
         // No ancestral state
-        add_row_without_metadata!(sites, add_site, 2. / 3., None);
+        {
+            let tables = add_row_without_metadata!(sites, add_site, 2. / 3., None);
+            compare_column_to_raw_column!(tables.sites(), position_slice, position_slice_raw);
+            compare_column_to_row!(tables.sites(), position_slice, position);
+        }
         add_row_without_metadata!(sites, add_site, tskit::Position::from(2. / 3.), None);
         add_row_without_metadata!(sites, add_site, 2. / 3., Some(&[1_u8]));
         add_row_without_metadata!(
@@ -136,14 +202,40 @@ mod test_adding_rows_without_metadata {
         // site, node, parent mutation, time, derived_state
         // Each value is a different Into<T> so we skip doing
         // permutations
-        add_row_without_metadata!(mutations, add_mutation, 0, 0, -1, 0.0, None);
+        {
+            let tables = add_row_without_metadata!(mutations, add_mutation, 0, 0, -1, 0.0, None);
+            compare_column_to_raw_column!(tables.mutations(), node_slice, node_slice_raw);
+            compare_column_to_raw_column!(tables.mutations(), time_slice, time_slice_raw);
+            compare_column_to_raw_column!(tables.mutations(), site_slice, site_slice_raw);
+            compare_column_to_raw_column!(tables.mutations(), parent_slice, parent_slice_raw);
+
+            compare_column_to_row!(tables.mutations(), node_slice, node);
+            compare_column_to_row!(tables.mutations(), time_slice, time);
+            compare_column_to_row!(tables.mutations(), site_slice, site);
+            compare_column_to_row!(tables.mutations(), parent_slice, parent);
+        }
+
         add_row_without_metadata!(mutations, add_mutation, 0, 0, -1, 0.0, Some(&[23_u8]));
     }
 
     #[test]
     fn test_adding_individual() {
         // flags, location, parents
-        add_row_without_metadata!(individuals, add_individual, 0, None, None);
+        {
+            let tables = add_row_without_metadata!(individuals, add_individual, 0, None, None);
+            assert!(tables
+                .individuals()
+                .flags_slice()
+                .iter()
+                .zip(tables.individuals().flags_slice_raw().iter())
+                .all(|(a, b)| a.bits() == *b));
+            assert!(tables
+                .individuals()
+                .flags_slice()
+                .iter()
+                .zip(tables.individuals().iter())
+                .all(|(c, r)| c == &r.flags));
+        }
         add_row_without_metadata!(
             individuals,
             add_individual,
@@ -179,7 +271,23 @@ mod test_adding_rows_without_metadata {
     fn test_adding_migration() {
         // migration table
         // (left, right), node, (source, dest), time
-        add_row_without_metadata!(migrations, add_migration, (0., 1.), 0, (0, 1), 0.0);
+        {
+            let tables =
+                add_row_without_metadata!(migrations, add_migration, (0., 1.), 0, (0, 1), 0.0);
+            compare_column_to_raw_column!(tables.migrations(), left_slice, left_slice_raw);
+            compare_column_to_raw_column!(tables.migrations(), right_slice, right_slice_raw);
+            compare_column_to_raw_column!(tables.migrations(), node_slice, node_slice_raw);
+            compare_column_to_raw_column!(tables.migrations(), time_slice, time_slice_raw);
+            compare_column_to_raw_column!(tables.migrations(), source_slice, source_slice_raw);
+            compare_column_to_raw_column!(tables.migrations(), dest_slice, dest_slice_raw);
+
+            compare_column_to_row!(tables.migrations(), left_slice, left);
+            compare_column_to_row!(tables.migrations(), right_slice, right);
+            compare_column_to_row!(tables.migrations(), node_slice, node);
+            compare_column_to_row!(tables.migrations(), time_slice, time);
+            compare_column_to_row!(tables.migrations(), source_slice, source);
+            compare_column_to_row!(tables.migrations(), dest_slice, dest);
+        }
         add_row_without_metadata!(
             migrations,
             add_migration,