1 files changed, 36 insertions, 0 deletions
diff --git a/src/libultra_code_O2/osPfsFreeBlocks.c b/src/libultra_code_O2/osPfsFreeBlocks.c
new file mode 100644
index 000000000..c7e7adcbf
--- /dev/null
+++ b/src/libultra_code_O2/osPfsFreeBlocks.c
@@ -0,0 +1,36 @@
+#include "ultra64.h"
+#include "global.h"
+#include "ultra64/pfs.h"
+
+s32 osPfsFreeBlocks(OSPfs* pfs, s32* leftoverBytes) {
+    s32 j;
+    s32 pages = 0;
+    __OSInode inode;
+    s32 ret = 0;
+    u8 bank;
+    s32 offset;
+
+    if (!(pfs->status & PFS_INITIALIZED)) {
+        return (PFS_ERR_INVALID);
+    }
+
+    if ((ret = __osCheckId(pfs)) != 0) {
+        return ret;
+    }
+
+    for (bank = PFS_ID_BANK_256K; bank < pfs->banks; bank++) {
+        if ((ret = __osPfsRWInode(pfs, &inode, PFS_READ, bank)) != 0) {
+            return ret;
+        }
+
+        offset = ((bank > PFS_ID_BANK_256K) ? 1 : pfs->inodeStartPage);
+        for (j = offset; j < PFS_INODE_SIZE_PER_PAGE; j++) {
+            if (inode.inodePage[j].ipage == PFS_PAGE_NOT_USED) {
+                pages++;
+            }
+        }
+    }
+
+    *leftoverBytes = pages * PFS_ONE_PAGE * BLOCKSIZE;
+    return 0;
+}