FSStatus
FSGetPosFileAsync(FSClient *client, FSCmdBlock *block, FSFileHandle handle, be_val<uint32_t> *pos, uint32_t flags, FSAsyncData *asyncData)
{
assert(asyncData->callback);
auto result = FSGetPosFile(client, block, handle, pos, flags);
FSAsyncCallback cb = static_cast<uint32_t>(asyncData->callback);
cb(client, block, result, asyncData->param);
return result;
}
static off_t FSDrvSeek(struct _reent* r, int fd, off_t pos, int dir) {
FSFileHandle* handle = (FSFileHandle*) fd;
FSStatus err = FS_STATUS_OK;
switch(dir) {
case SEEK_SET:
break;
case SEEK_CUR: {
u32 currPos = 0;
if((err = FSGetPosFile(fsClient, fsCmdBlock, *handle, &currPos, FS_RET_ALL_ERROR)) == FS_STATUS_OK) {
pos += currPos;
}
break;
}
case SEEK_END: {
FSStat stat;
if((err = FSGetStatFile(fsClient, fsCmdBlock, *handle, &stat, FS_RET_ALL_ERROR)) == FS_STATUS_OK) {
pos += stat.size;
}
break;
}
default:
r->_errno = EINVAL;
return -1;
}
if(err == FS_STATUS_OK) {
if(pos < 0) {
r->_errno = EINVAL;
return -1;
}
err = FSSetPosFile(fsClient, fsCmdBlock, *handle, (u32) pos, FS_RET_ALL_ERROR);
}
if(err != FS_ERROR_OK) {
FSDrvReportError(r);
return -1;
}
return 0;
}
static int FSDrvFTruncate(struct _reent* r, int fd, off_t len) {
FSFileHandle* handle = (FSFileHandle*) fd;
FSStatus err = FS_STATUS_OK;
u32 currPos = 0;
if((err = FSGetPosFile(fsClient, fsCmdBlock, *handle, &currPos, FS_RET_ALL_ERROR)) == FS_STATUS_OK
&& (err = FSSetPosFile(fsClient, fsCmdBlock, *handle, (u32) len, FS_RET_ALL_ERROR)) == FS_STATUS_OK) {
err = FSTruncateFile(fsClient, fsCmdBlock, *handle, FS_RET_ALL_ERROR);
FSStatus restoreErr = FSSetPosFile(fsClient, fsCmdBlock, *handle, currPos, FS_RET_ALL_ERROR);
if(err == FS_STATUS_OK) {
err = restoreErr;
}
}
if(err != FS_ERROR_OK) {
FSDrvReportError(r);
return -1;
}
return 0;
}