1 files changed, 101 insertions, 0 deletions
diff --git a/source/luametatex/source/tex/texinserts.h b/source/luametatex/source/tex/texinserts.h
new file mode 100644
index 000000000..e91965e6f
--- /dev/null
+++ b/source/luametatex/source/tex/texinserts.h
@@ -0,0 +1,101 @@
+/*
+    See license.txt in the root of this project.
+*/
+
+# ifndef LMT_INSERTS_H
+# define LMT_INSERTS_H
+
+typedef struct insert_record {
+    halfword limit;
+    halfword multiplier;
+    halfword distance;
+    halfword content;
+    halfword initialized;
+    halfword options;
+    halfword penalty;
+    halfword maxdepth;
+} insert_record;
+
+typedef enum insert_modes {
+    unset_insert_mode,
+    index_insert_mode,
+    class_insert_mode,
+} insert_modes;
+
+typedef enum insert_class_options {
+    insert_option_storing  = 0x1,
+    insert_option_penalty  = 0x2,
+    insert_option_maxdepth = 0x4,
+} insert_class_options;
+
+typedef enum insert_storage_actions {
+    insert_storage_ignore,
+    insert_storage_delay,
+    insert_storage_inject,
+} insert_storage_actions;
+
+typedef enum saved_insert_items {
+    saved_insert_item_index = 0,
+    saved_insert_n_of_items = 1,
+} saved_insert_items;
+
+typedef struct insert_state_info {
+    insert_record *inserts;
+    memory_data    insert_data;
+    int            mode;
+    halfword       storing;
+    halfword       head;
+    halfword       tail;
+} insert_state_info;
+
+extern insert_state_info lmt_insert_state;
+
+# define has_insert_option(a,b)   (lmt_insert_state.mode == class_insert_mode && (lmt_insert_state.inserts[a].options & b) == b)
+# define set_insert_option(a,b)   (lmt_insert_state.inserts[a].options |= b)
+# define unset_insert_option(a,b) (lmt_insert_state.inserts[a].options & ~(b))
+
+extern scaled   tex_get_insert_limit      (halfword i);
+extern halfword tex_get_insert_multiplier (halfword i);
+extern halfword tex_get_insert_penalty    (halfword i);
+extern halfword tex_get_insert_distance   (halfword i);
+extern halfword tex_get_insert_maxdepth   (halfword i);
+extern scaled   tex_get_insert_height     (halfword i);
+extern scaled   tex_get_insert_depth      (halfword i);
+extern scaled   tex_get_insert_width      (halfword i);
+extern halfword tex_get_insert_content    (halfword i);
+extern halfword tex_get_insert_storage    (halfword i);
+
+extern void     tex_set_insert_limit      (halfword i, scaled v);
+extern void     tex_set_insert_multiplier (halfword i, halfword v);
+extern void     tex_set_insert_penalty    (halfword i, halfword v);
+extern void     tex_set_insert_distance   (halfword i, halfword v);
+extern void     tex_set_insert_maxdepth   (halfword i, halfword v);
+extern void     tex_set_insert_height     (halfword i, scaled v);
+extern void     tex_set_insert_depth      (halfword i, scaled v);
+extern void     tex_set_insert_width      (halfword i, scaled v);
+extern void     tex_set_insert_content    (halfword i, halfword v);
+extern void     tex_set_insert_storage    (halfword i, halfword v);
+
+extern void     tex_wipe_insert           (halfword i);
+
+extern void     tex_initialize_inserts    (void);
+extern int      tex_valid_insert_id       (halfword n);
+extern void     tex_dump_insert_data      (dumpstream f);
+extern void     tex_undump_insert_data    (dumpstream f);
+
+extern halfword lmt_get_insert_distance   (halfword i, int slot); /* callback */
+
+extern halfword tex_get_insert_progress   (halfword i);
+
+extern void     tex_insert_store          (halfword i, halfword n);
+extern void     tex_insert_restore        (halfword n);
+extern int      tex_insert_stored         (void);
+
+extern halfword tex_scan_insert_index     (void);
+extern void     tex_set_insert_mode       (halfword mode);
+extern int      tex_insert_is_void        (halfword i);
+
+extern void     tex_run_insert            (void);
+extern void     tex_finish_insert_group   (void);
+
+# endif