1 files changed, 36 insertions, 0 deletions
diff --git a/core/module-save.h b/core/module-save.h
new file mode 100644
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--- /dev/null
+++ b/core/module-save.h
@@ -0,0 +1,36 @@
+#ifndef PURE_MODULE_SAVE_H
+#define PURE_MODULE_SAVE_H
+#include "module.h"
+
+/* App states a data host keeps (docs/design/008-module-format.md), internal
+ * to the module executor. Each text state is a stored draft, each list state
+ * a stored draft its list mirrors, and numbers, cursors and indices are one
+ * stored value by name. A save publishes what changed, all or nothing. */
+
+bool pure_save_enabled(const PureApp *);
+/* A text state of m: its stored value, or its initial constant when none. */
+PureResult pure_save_open_text(PureApp *, const PureModule *m, uint32_t state, PureDraft **out, PureVersion *saved);
+/* A list state of m: its stored items, fields moved by name when the stored
+ * record differs from m's. */
+PureResult pure_save_open_list(PureApp *, const PureModule *m, uint32_t state, PureList **out, PureDraft **draft,
+                               PureVersion *saved);
+/* Open the stored numbers, cursors and indices, and put each stored one of the
+ * same name and kind that still fits into values, for the states of m that
+ * kept marks as new (-1); texts and lists are m's. */
+PureResult pure_save_open_values(PureApp *, const PureModule *m, double *values, const int *kept,
+                                 PureDraft *const *texts, PureList *const *lists);
+/* Store a list whose record changed in its draft, header and items anew. */
+PureResult pure_save_rewrite_list(const PureModule *m, uint32_t state, PureList *list, PureDraft *draft);
+/* The stored links of a starting app (module.h, PureApp); CONFLICT when an
+ * output with sends left is missing or has other fields. */
+PureResult pure_save_open_links(PureApp *, const PureModule *m);
+/* Publish the documents and every state changed since the last save
+ * (values are the states' numbers); revisions are the documents'. */
+PureResult pure_save_commit(PureApp *, const double *values, void *const *documents, size_t document_count,
+                            int64_t *revisions);
+
+/* A list with record's fields, taking from `from` each field of the same name
+ * and kind and giving the others their defaults (module.c). */
+PureResult pure_list_migrate(PureList **out, const PureList *from, const char *const *names,
+                             const uint8_t *text, unsigned count, const PureModule *m, uint32_t record);
+#endif