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#include "libultra_internal.h"
#include "controller.h"
static s32 __osClearPage(OSPfs* pfs, int page_no, u8* data, u8 bank);
s32 osPfsAllocateFile(OSPfs* pfs, u16 company_code, u32 game_code, u8* game_name, u8* ext_name, int file_size_in_bytes,
s32* file_no) {
int start_page;
int decleared;
int last_page;
int old_last_page;
int j;
s32 ret;
int file_size_in_pages;
__OSInode inode;
__OSInode backup_inode;
__OSDir dir;
u8 bank;
u8 old_bank;
int firsttime;
s32 bytes;
__OSInodeUnit fpage;
old_last_page = 0;
ret = 0;
old_bank = 0;
firsttime = 0;
if (company_code == 0 || game_code == 0) {
return PFS_ERR_INVALID;
}
file_size_in_pages = (file_size_in_bytes + 255) / (BLOCKSIZE * PFS_ONE_PAGE);
if ((pfs->status & PFS_INITIALIZED) == false) {
return PFS_ERR_INVALID;
}
PFS_CHECK_ID;
ret = osPfsFindFile(pfs, company_code, game_code, game_name, ext_name, file_no);
if (ret != 0 && ret != PFS_ERR_INVALID) {
return ret;
}
if (*file_no != -1) {
return PFS_ERR_EXIST;
}
ret = osPfsFreeBlocks(pfs, &bytes);
if (file_size_in_bytes > bytes) {
return PFS_DATA_FULL;
}
if (file_size_in_pages != 0) {
ret = osPfsFindFile(pfs, 0, 0, NULL, NULL, file_no);
if (ret != 0 && ret != PFS_ERR_INVALID) {
return ret;
}
if (*file_no == -1) {
return PFS_DIR_FULL;
}
for (bank = 0; bank < pfs->banks; bank++) {
ERRCK(__osPfsRWInode(pfs, &inode, OS_READ, bank));
ERRCK(__osPfsDeclearPage(pfs, &inode, file_size_in_pages, &start_page, bank, &decleared, &last_page));
if (start_page != -1) {
if (firsttime == 0) {
fpage.inode_t.page = start_page;
fpage.inode_t.bank = bank;
} else {
backup_inode.inode_page[old_last_page].inode_t.bank = bank;
backup_inode.inode_page[old_last_page].inode_t.page = start_page;
ERRCK(__osPfsRWInode(pfs, &backup_inode, OS_WRITE, old_bank));
}
for (j = 0; j < ARRLEN(inode.inode_page); j++) {
backup_inode.inode_page[j].ipage = inode.inode_page[j].ipage;
}
old_last_page = last_page;
old_bank = bank;
firsttime++;
if (file_size_in_pages > decleared) {
file_size_in_pages = file_size_in_pages - decleared;
} else {
file_size_in_pages = 0;
break;
}
}
}
if (file_size_in_pages > 0 || start_page == -1) {
return PFS_ERR_INCONSISTENT;
}
backup_inode.inode_page[old_last_page].inode_t.bank = bank;
backup_inode.inode_page[old_last_page].inode_t.page = start_page;
ERRCK(__osPfsRWInode(pfs, &backup_inode, OS_WRITE, old_bank));
dir.start_page = fpage;
dir.company_code = company_code;
dir.game_code = game_code;
dir.data_sum = 0;
for (j = 0; j < ARRLEN(dir.game_name); j++) {
dir.game_name[j] = *game_name++;
}
for (j = 0; j < ARRLEN(dir.ext_name); j++) {
dir.ext_name[j] = *ext_name++;
}
ERRCK(__osContRamWrite(pfs->queue, pfs->channel, *file_no + pfs->dir_table, (u8*) &dir, false));
return ret;
}
return PFS_ERR_INVALID;
}
s32 __osPfsDeclearPage(OSPfs* pfs, __OSInode* inode, int file_size_in_pages, int* first_page, u8 bank, int* decleared,
int* last_page) {
int j;
int spage;
int old_page;
u8 tmp_data[BLOCKSIZE];
int i;
s32 ret;
int offset;
ret = 0;
if (bank > 0) {
offset = 1;
} else {
offset = pfs->inode_start_page;
}
for (j = offset; j < ARRLEN(inode->inode_page); j++) {
if (inode->inode_page[j].ipage == 3) {
break;
}
}
if (j == ARRLEN(inode->inode_page)) {
*first_page = -1;
return ret;
}
for (i = 0; i < ARRLEN(tmp_data); i++) {
tmp_data[i] = 0;
}
spage = j;
*decleared = 1;
old_page = j++;
while (file_size_in_pages > *decleared && j < ARRLEN(inode->inode_page)) {
if (inode->inode_page[j].ipage == 3) {
inode->inode_page[old_page].inode_t.bank = bank;
inode->inode_page[old_page].inode_t.page = j;
ERRCK(__osClearPage(pfs, old_page, (u8*) tmp_data, bank));
old_page = j;
(*decleared)++;
}
j++;
}
*first_page = spage;
if (j == ARRLEN(inode->inode_page)) {
if (file_size_in_pages > *decleared) {
*last_page = old_page;
return ret;
}
}
inode->inode_page[old_page].ipage = 1;
ret = __osClearPage(pfs, old_page, (u8*) tmp_data, bank);
*last_page = 0;
return ret;
}
static s32 __osClearPage(OSPfs* pfs, int page_no, u8* data, u8 bank) {
int i;
s32 ret;
ret = 0;
pfs->activebank = bank;
ERRCK(__osPfsSelectBank(pfs));
for (i = 0; i < PFS_ONE_PAGE; i++) {
ret = __osContRamWrite(pfs->queue, pfs->channel, page_no * PFS_ONE_PAGE + i, data, false);
if (ret != 0) {
break;
}
}
pfs->activebank = 0;
ret = __osPfsSelectBank(pfs);
return ret;
}
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