static ssize_t sd_fat_write_r (struct _reent *r, int fd, const char *ptr, size_t len)
{
sd_fat_file_state_t *file = (sd_fat_file_state_t *)fd;
if(!file->dev) {
r->_errno = ENODEV;
return 0;
}
if(!file->write)
{
r->_errno = EACCES;
return 0;
}
OSLockMutex(file->dev->pMutex);
size_t len_aligned = FS_ALIGN(len);
if(len_aligned > 0x4000)
len_aligned = 0x4000;
unsigned char *tmpBuf = (unsigned char *)memalign(FS_ALIGNMENT, len_aligned);
if(!tmpBuf) {
r->_errno = ENOMEM;
OSUnlockMutex(file->dev->pMutex);
return 0;
}
size_t done = 0;
while(done < len)
{
size_t write_size = (len_aligned < (len - done)) ? len_aligned : (len - done);
memcpy(tmpBuf, ptr + done, write_size);
int result = FSWriteFile(file->dev->pClient, file->dev->pCmd, tmpBuf, 0x01, write_size, file->fd, 0, -1);
#if 0
FSFlushFile(file->dev->pClient, file->dev->pCmd, file->fd, -1);
#endif
if(result < 0)
{
r->_errno = result;
break;
}
else if(result == 0)
{
if(write_size > 0)
done = 0;
break;
}
else
{
done += result;
file->pos += result;
}
}
free(tmpBuf);
OSUnlockMutex(file->dev->pMutex);
return done;
}
static int FSDrvFSync(struct _reent* r, int fd) {
FSFileHandle* handle = (FSFileHandle*) fd;
FSStatus err = FSFlushFile(fsClient, fsCmdBlock, *handle, FS_RET_ALL_ERROR);
if(err != FS_STATUS_OK) {
FSDrvReportError(r);
return -1;
}
return 0;
}
static int sd_fat_fsync_r (struct _reent *r, int fd)
{
sd_fat_file_state_t *file = (sd_fat_file_state_t *)fd;
if(!file->dev) {
r->_errno = ENODEV;
return -1;
}
OSLockMutex(file->dev->pMutex);
int result = FSFlushFile(file->dev->pClient, file->dev->pCmd, file->fd, -1);
OSUnlockMutex(file->dev->pMutex);
if(result < 0) {
r->_errno = result;
return -1;
}
return 0;
}
