Beginnings of a file-moving API

2 files changed, 59 insertions, 0 deletions

diff --git a/com32/libutil/include/loadfile.h b/com32/libutil/include/loadfile.h
new file mode 100644
index 00000000..fbda589d
--- /dev/null
+++ b/com32/libutil/include/loadfile.h
@@ -0,0 +1,12 @@
+#ifndef LIBUTIL_LOADFILE_H
+#define LIBUTIL_LOADFILE_H
+
+#include <stddef.h>
+
+/* loadfile() returns the true size of the file, but will guarantee valid,
+   zero-padded memory out to this boundary. */
+#define LOADFILE_ZERO_PAD	64
+
+int loadfile(const char *, void **, size_t *);
+
+#endif
diff --git a/com32/libutil/include/movebits.h b/com32/libutil/include/movebits.h
new file mode 100644
index 00000000..de6ee1ff
--- /dev/null
+++ b/com32/libutil/include/movebits.h
@@ -0,0 +1,47 @@
+#ifndef LIBUTIL_MOVEBITS_H
+#define LIBUTIL_MOVEBITS_H
+
+#include <inttypes.h>
+#include <setjmp.h>
+
+struct movelist {
+  uintptr_t dst;
+  uintptr_t src;
+  uintptr_t len;
+  struct movelist *next;
+};
+
+struct move_descriptor {
+  uint32_t dst;
+  uint32_t src;
+  uint32_t len;
+};
+
+/*
+ * Creates a movelist consisting of only one element, and
+ * if parent == NULL insert into the movelist chain immediately after
+ * the parent element.
+ */
+struct movelist *
+make_movelist(struct movelist *parent, uintptr_t dst,
+	      uintptr_t src, uintptr_t len);
+
+/*
+ * Convert a movelist into a linear array of struct move_descriptors,
+ * returning the number of descriptors and freeing the movelist.
+ *
+ * Returns (size_t)-1 on failure; if so the movelist is still valid.
+ */
+size_t
+linearize_movelist(struct move_descriptor **d, struct movelist *m);
+
+/*
+ * moves is computed from "frags" and "freemem".  "space" lists
+ * free memory areas at our disposal, and is (src, cnt) only.
+ */
+
+int
+compute_movelist(struct movelist **moves, struct movelist *frags,
+		 struct movelist *space);
+
+#endif /* LIBUTIL_MOVEBITS_H */