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