libmocha/source/devoptab/devoptab_fsa_utils.cpp

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#include "devoptab_fsa.h"
char *
__fsa_fixpath(struct _reent *r,
const char *path) {
char *p;
char *fixedPath;
if (!path) {
r->_errno = EINVAL;
return nullptr;
}
p = strchr(path, ':') + 1;
if (!strchr(path, ':')) {
p = (char *) path;
}
size_t pathLength = strlen(p);
if (pathLength > FS_MAX_PATH) {
r->_errno = ENAMETOOLONG;
return nullptr;
}
// wii u softlocks on empty strings so give expected error back
if (pathLength == 0) {
r->_errno = ENOENT;
return nullptr;
}
fixedPath = static_cast<char *>(memalign(0x40, FS_MAX_PATH + 1));
if (!fixedPath) {
r->_errno = ENOMEM;
return nullptr;
}
if (p[0] == '/') {
auto *deviceData = (FSADeviceData *) r->deviceData;
strcpy(fixedPath, deviceData->mount_path);
strcat(fixedPath, p);
} else {
strcpy(fixedPath, p);
}
return fixedPath;
}
mode_t __fsa_translate_stat_mode(FSAStat *fileStat) {
mode_t retMode = 0;
if ((fileStat->flags & FS_STAT_LINK) == FS_STAT_LINK) {
retMode |= S_IFLNK;
} else if ((fileStat->flags & FS_STAT_DIRECTORY) == FS_STAT_DIRECTORY) {
retMode |= S_IFDIR;
} else if ((fileStat->flags & FS_STAT_FILE) == FS_STAT_FILE) {
retMode |= S_IFREG;
} else if (fileStat->size == 0) {
// Mounted paths like /vol/external01 have no flags set.
// If no flag is set and the size is 0, it's a (root) dir
retMode |= S_IFDIR;
} else if (fileStat->size > 0) {
// Some regular Wii U files have no type info but will have a size
retMode |= S_IFREG;
}
// Convert normal CafeOS hexadecimal permission bits into Unix octal permission bits
mode_t permissionMode = (((fileStat->mode >> 2) & S_IRWXU) | ((fileStat->mode >> 1) & S_IRWXG) | (fileStat->mode & S_IRWXO));
return retMode | permissionMode;
}
void __fsa_translate_stat(FSAStat *fsStat, struct stat *posStat) {
memset(posStat, 0, sizeof(struct stat));
posStat->st_dev = (dev_t) nullptr;
posStat->st_ino = fsStat->entryId;
posStat->st_mode = __fsa_translate_stat_mode(fsStat);
posStat->st_nlink = 1;
posStat->st_uid = fsStat->owner;
posStat->st_gid = fsStat->group;
posStat->st_rdev = posStat->st_dev;
posStat->st_size = fsStat->size;
posStat->st_atime = __fsa_translate_time(fsStat->modified);
posStat->st_ctime = __fsa_translate_time(fsStat->created);
posStat->st_mtime = __fsa_translate_time(fsStat->modified);
posStat->st_blksize = 512;
posStat->st_blocks = (posStat->st_size + posStat->st_blksize - 1) / posStat->st_size;
}
// The Wii U FSTime epoch is at 1980, so we must map it to 1970 for gettime
#define WIIU_FSTIME_EPOCH_YEAR (1980)
#define EPOCH_YEAR (1970)
#define EPOCH_YEARS_SINCE_LEAP 2
#define EPOCH_YEARS_SINCE_CENTURY 70
#define EPOCH_YEARS_SINCE_LEAP_CENTURY 370
#define EPOCH_DIFF_YEARS(year) (year - EPOCH_YEAR)
#define EPOCH_DIFF_DAYS(year) \
((EPOCH_DIFF_YEARS(year) * 365) + \
(EPOCH_DIFF_YEARS(year) - 1 + EPOCH_YEARS_SINCE_LEAP) / 4 - \
(EPOCH_DIFF_YEARS(year) - 1 + EPOCH_YEARS_SINCE_CENTURY) / 100 + \
(EPOCH_DIFF_YEARS(year) - 1 + EPOCH_YEARS_SINCE_LEAP_CENTURY) / 400)
#define EPOCH_DIFF_SECS(year) (60ull * 60ull * 24ull * (uint64_t) EPOCH_DIFF_DAYS(year))
time_t __fsa_translate_time(FSTime timeValue) {
return (timeValue / 1000000) + EPOCH_DIFF_SECS(WIIU_FSTIME_EPOCH_YEAR);
}
FSMode __fsa_translate_permission_mode(mode_t mode) {
// Convert normal Unix octal permission bits into CafeOS hexadecimal permission bits
return (FSMode) (((mode & S_IRWXU) << 2) | ((mode & S_IRWXG) << 1) | (mode & S_IRWXO));
}
int __fsa_translate_error(FSError error) {
switch (error) {
case FS_ERROR_END_OF_DIR:
case FS_ERROR_END_OF_FILE:
return ENOENT;
case FS_ERROR_ALREADY_EXISTS:
return EEXIST;
case FS_ERROR_MEDIA_ERROR:
return EIO;
case FS_ERROR_NOT_FOUND:
return ENOENT;
case FS_ERROR_PERMISSION_ERROR:
return EPERM;
case FS_ERROR_STORAGE_FULL:
return ENOSPC;
case FS_ERROR_BUSY:
return EBUSY;
case FS_ERROR_CANCELLED:
return ECANCELED;
case FS_ERROR_FILE_TOO_BIG:
return EFBIG;
case FS_ERROR_INVALID_PATH:
return ENAMETOOLONG;
case FS_ERROR_NOT_DIR:
return ENOTDIR;
case FS_ERROR_NOT_FILE:
return EISDIR;
case FS_ERROR_OUT_OF_RANGE:
return ESPIPE;
case FS_ERROR_UNSUPPORTED_COMMAND:
return ENOTSUP;
case FS_ERROR_WRITE_PROTECTED:
return EROFS;
case FS_ERROR_NOT_INIT:
return ENODEV;
// TODO
case FS_ERROR_MAX_MOUNT_POINTS:
break;
case FS_ERROR_MAX_VOLUMES:
break;
case FS_ERROR_MAX_CLIENTS:
break;
case FS_ERROR_MAX_FILES:
break;
case FS_ERROR_MAX_DIRS:
break;
case FS_ERROR_ALREADY_OPEN:
break;
case FS_ERROR_NOT_EMPTY:
break;
case FS_ERROR_ACCESS_ERROR:
break;
case FS_ERROR_DATA_CORRUPTED:
break;
case FS_ERROR_JOURNAL_FULL:
break;
case FS_ERROR_UNAVAILABLE_COMMAND:
break;
case FS_ERROR_INVALID_PARAM:
break;
case FS_ERROR_INVALID_BUFFER:
break;
case FS_ERROR_INVALID_ALIGNMENT:
break;
case FS_ERROR_INVALID_CLIENTHANDLE:
break;
case FS_ERROR_INVALID_FILEHANDLE:
break;
case FS_ERROR_INVALID_DIRHANDLE:
break;
case FS_ERROR_OUT_OF_RESOURCES:
break;
case FS_ERROR_MEDIA_NOT_READY:
break;
case FS_ERROR_INVALID_MEDIA:
break;
default:
break;
}
return (int) EIO;
}