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#include "nitro.h"
#include "MI_byteAccess.h"
#include "FS_rom.h"
#include "FS_file.h"
#include "FSi_util.h"
extern FSDirPos current_dir_pos;
BOOL is_init = FALSE;
static BOOL FSi_FindPath(FSFile * p_dir, const char * path, FSFileID * p_file_id, FSDirPos * p_dir_pos);
ARM_FUNC void FS_Init(u32 default_dma_no)
{
if (!is_init)
{
is_init = TRUE;
FSi_InitRom(default_dma_no);
}
}
ARM_FUNC BOOL FS_IsAvailable(void)
{
return is_init;
}
ARM_FUNC void FS_InitFile(FSFile * p_file)
{
p_file->link.next = p_file->link.prev = NULL;
OS_InitThreadQueue(p_file->queue);
p_file->arc = NULL;
p_file->command = FS_COMMAND_INVALID;
p_file->stat = 0;
}
static BOOL FSi_FindPath(FSFile * p_dir, const char * path, FSFileID * p_file_id, FSDirPos * p_dir_pos)
{
FSDirPos pos;
if (FSi_IsSlash(MI_ReadByte(path)))
{
pos.arc = current_dir_pos.arc;
pos.own_id = 0;
pos.pos = 0;
pos.index = 0;
path++;
}
else
{
int i;
pos = current_dir_pos;
for (i = 0; i <= FS_ARCHIVE_NAME_LEN_MAX; ++i)
{
u32 c = MI_ReadByte(path + i);
if (!c || FSi_IsSlash(c))
break;
else if (c == ':')
{
FSArchive * const p_arc = FS_FindArchive(path, i);
if (!p_arc)
{
return FALSE;
}
else if (!FS_IsArchiveLoaded(p_arc))
{
return FALSE;
}
pos.arc = p_arc;
pos.pos = 0;
pos.index = 0;
pos.own_id = 0;
path += i + 1;
if (FSi_IsSlash(MI_ReadByte(path)))
++path;
break;
}
}
}
p_dir->arc = pos.arc;
p_dir->arg.findpath.path = path;
p_dir->arg.findpath.pos = pos;
if (p_dir_pos)
{
p_dir->arg.findpath.find_directory = TRUE;
p_dir->arg.findpath.result.dir = p_dir_pos;
}
else
{
p_dir->arg.findpath.find_directory = FALSE;
p_dir->arg.findpath.result.file = p_file_id;
}
return FSi_SendCommand(p_dir, FS_COMMAND_FINDPATH);
}
ARM_FUNC int FSi_ReadFileCore(FSFile * p_file, void * dst, s32 len, BOOL async)
{
const s32 pos = (s32)p_file->prop.file.pos;
const s32 rest = (s32)(p_file->prop.file.bottom - pos);
const u32 org = (u32)len;
if (len > rest)
len = rest;
if (len < 0)
len = 0;
p_file->arg.readfile.dst = dst;
p_file->arg.readfile.len_org = org;
p_file->arg.readfile.len = (u32)len;
if (!async)
p_file->stat |= FS_FILE_STATUS_SYNC;
(void)FSi_SendCommand(p_file, FS_COMMAND_READFILE);
if (!async)
{
if (FS_WaitAsync(p_file))
len = (s32)(p_file->prop.file.pos - pos);
else
len = -1;
}
return len;
}
ARM_FUNC BOOL FS_ConvertPathToFileID(FSFileID * p_file_id, const char * path)
{
FSFile dir;
FS_InitFile(&dir);
if (!FSi_FindPath(&dir, path, p_file_id, NULL))
return FALSE;
return TRUE;
}
ARM_FUNC BOOL FS_OpenFileDirect(FSFile * p_file, FSArchive * p_arc, u32 image_top, u32 image_bottom, u32 file_index)
{
p_file->arc = p_arc;
p_file->arg.openfiledirect.index = file_index;
p_file->arg.openfiledirect.top = image_top;
p_file->arg.openfiledirect.bottom = image_bottom;
if (!FSi_SendCommand(p_file, FS_COMMAND_OPENFILEDIRECT))
return FALSE;
p_file->stat |= FS_FILE_STATUS_IS_FILE;
p_file->stat &= ~FS_FILE_STATUS_IS_DIR;
return TRUE;
}
ARM_FUNC BOOL FS_OpenFileFast(FSFile * p_file, FSFileID file_id)
{
if (!file_id.arc)
return FALSE;
p_file->arc = file_id.arc;
p_file->arg.openfilefast.id = file_id;
if (!FSi_SendCommand(p_file, FS_COMMAND_OPENFILEFAST))
return FALSE;
p_file->stat |= FS_FILE_STATUS_IS_FILE;
p_file->stat &= ~FS_FILE_STATUS_IS_DIR;
return TRUE;
}
ARM_FUNC BOOL FS_OpenFile(FSFile * p_file, const char * path)
{
FSFileID file_id;
return FS_ConvertPathToFileID(&file_id, path) && FS_OpenFileFast(p_file, file_id);
}
ARM_FUNC BOOL FS_CloseFile(FSFile * p_file)
{
if (!FSi_SendCommand(p_file, FS_COMMAND_CLOSEFILE))
return FALSE;
p_file->arc = NULL;
p_file->command = FS_COMMAND_INVALID;
p_file->stat &= ~(FS_FILE_STATUS_IS_FILE | FS_FILE_STATUS_IS_DIR);
return TRUE;
}
ARM_FUNC BOOL FS_WaitAsync(FSFile * p_file)
{
BOOL is_owner = FALSE;
OSIntrMode bak_par = OS_DisableInterrupts();
if (FS_IsBusy(p_file))
{
is_owner = !(p_file->stat & (FS_FILE_STATUS_SYNC | FS_FILE_STATUS_OPERATING));
if (is_owner)
{
p_file->stat |= FS_FILE_STATUS_SYNC;
do
{
OS_SleepThread(p_file->queue);
} while (!(p_file->stat & FS_FILE_STATUS_OPERATING));
}
else
{
do
{
OS_SleepThread(p_file->queue);
} while (FS_IsBusy(p_file));
}
}
(void)OS_RestoreInterrupts(bak_par);
if (is_owner)
{
return FSi_ExecuteSyncCommand(p_file);
}
return FS_IsSucceeded(p_file);
}
ARM_FUNC int FS_ReadFileAsync(FSFile * p_file, void * dst, s32 len)
{
return FSi_ReadFileCore(p_file, dst, len, TRUE);
}
ARM_FUNC int FS_ReadFile(FSFile * p_file, void * dst, s32 len)
{
return FSi_ReadFileCore(p_file, dst, len, FALSE);
}
ARM_FUNC BOOL FS_SeekFile(FSFile * p_file, s32 offset, FSSeekFileMode origin)
{
switch (origin)
{
case FS_SEEK_SET:
offset += p_file->prop.file.top;
break;
case FS_SEEK_CUR:
offset += p_file->prop.file.pos;
break;
case FS_SEEK_END:
offset += p_file->prop.file.bottom;
break;
default:
return FALSE;
}
if (offset < (s32)p_file->prop.file.top)
offset = (s32)p_file->prop.file.top;
if (offset > (s32)p_file->prop.file.bottom)
offset = (s32)p_file->prop.file.bottom;
p_file->prop.file.pos = (u32)offset;
return TRUE;
}
ARM_FUNC BOOL FS_ChangeDir(const char * path)
{
FSDirPos pos;
FSFile dir;
FS_InitFile(&dir);
if (!FSi_FindPath(&dir, path, NULL, &pos))
return FALSE;
current_dir_pos = pos;
return TRUE;
}
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