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#include "ultra64/pfs.h"
#include "global.h"
s32 osPfsDeleteFile(OSPfs* pfs, u16 companyCode, u32 gameCode, u8* gameName, u8* extName) {
s32 file_no;
s32 ret;
__OSInode inode;
__OSDir dir;
__OSInodeUnit last_page;
u8 startpage;
u8 bank;
if ((companyCode == 0) || (gameCode == 0)) {
return PFS_ERR_INVALID;
}
if ((ret = osPfsFindFile(pfs, companyCode, gameCode, gameName, extName, &file_no)) != 0) {
return ret;
}
if ((pfs->activebank != 0) && (ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, pfs->dir_table + file_no, (u8*)&dir)) != 0) {
return ret;
}
startpage = dir.start_page.inode_t.page;
for (bank = dir.start_page.inode_t.bank; bank < pfs->banks;) {
if ((ret = __osPfsRWInode(pfs, &inode, PFS_READ, bank)) != 0) {
return ret;
}
if ((ret = __osPfsReleasePages(pfs, &inode, startpage, bank, &last_page)) != 0) {
return ret;
}
if ((ret = __osPfsRWInode(pfs, &inode, PFS_WRITE, bank)) != 0) {
return ret;
}
if (last_page.ipage == PFS_EOF) {
break;
}
bank = last_page.inode_t.bank;
startpage = last_page.inode_t.page;
}
if (bank >= pfs->banks) {
return PFS_ERR_INCONSISTENT;
}
bzero(&dir, sizeof(__OSDir));
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->dir_table + file_no, (u8*)&dir, 0);
return ret;
}
s32 __osPfsReleasePages(OSPfs* pfs, __OSInode* inode, u8 initialPage, u8 bank, __OSInodeUnit* finalPage) {
__OSInodeUnit next;
__OSInodeUnit prev;
s32 ret = 0;
next.ipage = (u16)((bank << 8) + initialPage);
do {
prev = next;
next = inode->inodePage[next.inode_t.page];
inode->inodePage[prev.inode_t.page].ipage = PFS_PAGE_NOT_USED;
} while (next.ipage >= pfs->inodeStartPage && next.inode_t.bank == bank);
*finalPage = next;
return ret;
}
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