59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
#include "ultra64.h"
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#include "global.h"
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s32 osPfsFileState(OSPfs* pfs, s32 fileNo, OSPfsState* state) {
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s32 ret;
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s32 pages;
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__OSInode inode;
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__OSDir dir;
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__OSInodeUnit page;
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u8 bank;
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if (fileNo >= pfs->dir_size || fileNo < 0) {
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return PFS_ERR_INVALID;
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}
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if (!(pfs->status & PFS_INITIALIZED)) {
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return PFS_ERR_INVALID;
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}
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if ((ret = __osCheckId(pfs)) != 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 + fileNo, (u8*)&dir)) != 0) {
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return ret;
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}
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if (dir.company_code == 0 || dir.game_code == 0) {
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return PFS_ERR_INVALID;
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}
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page = dir.start_page;
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pages = 0;
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bank = 0xFF;
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while (true) {
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if (page.ipage < pfs->inodeStartPage) {
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break;
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}
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if (page.inode_t.bank != bank) {
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bank = page.inode_t.bank;
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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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}
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pages++;
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page = inode.inodePage[page.inode_t.page];
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}
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if (page.ipage != PFS_EOF) {
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return PFS_ERR_INCONSISTENT;
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}
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state->file_size = pages * PFS_ONE_PAGE * BLOCKSIZE;
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state->company_code = dir.company_code;
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state->game_code = dir.game_code;
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bcopy(&dir.game_name, state->game_name, PFS_FILE_NAME_LEN);
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bcopy(&dir.ext_name, state->ext_name, PFS_FILE_EXT_LEN);
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return __osPfsGetStatus(pfs->queue, pfs->channel);
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}
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