diff options
Diffstat (limited to 'arm9/lib/src/FS_file.c')
| -rw-r--r-- | arm9/lib/src/FS_file.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/arm9/lib/src/FS_file.c b/arm9/lib/src/FS_file.c new file mode 100644 index 00000000..32c07187 --- /dev/null +++ b/arm9/lib/src/FS_file.c @@ -0,0 +1,244 @@ +#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; + +void FS_Init(u32 default_dma_no) +{ + if (!is_init) + { + is_init = TRUE; + FSi_InitRom(default_dma_no); + } +} + +BOOL FS_IsAvailable(void) +{ + return is_init; +} + +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); +} + +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; +} + +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; +} + +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; +} + +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; +} + +BOOL FS_OpenFile(FSFile * p_file, const char * path) +{ + FSFileID file_id; + return FS_ConvertPathToFileID(&file_id, path) && FS_OpenFileFast(p_file, file_id); +} + +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; +} + +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); +} + +int FS_ReadFileAsync(FSFile * p_file, void * dst, s32 len) +{ + return FSi_ReadFileCore(p_file, dst, len, TRUE); +} + +int FS_ReadFile(FSFile * p_file, void * dst, s32 len) +{ + return FSi_ReadFileCore(p_file, dst, len, FALSE); +} + +BOOL FS_SeekFile(FSFile * p_file, int 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 = offset; + return TRUE; +} + +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; +} |