s32_t SPIFFS_fremove(spiffs *fs, spiffs_file fh) {
#if SPIFFS_READ_ONLY
(void)fs; (void)fh;
return SPIFFS_ERR_RO_NOT_IMPL;
#else
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
spiffs_fd *fd;
s32_t res;
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
if ((fd->flags & SPIFFS_O_WRONLY) == 0) {
res = SPIFFS_ERR_NOT_WRITABLE;
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
}
#if SPIFFS_CACHE_WR
spiffs_cache_fd_release(fs, fd->cache_page);
#endif
res = spiffs_object_truncate(fd, 0, 1);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
SPIFFS_UNLOCK(fs);
return 0;
#endif // SPIFFS_READ_ONLY
}
s32_t SPIFFS_read_notify(spiffs *fs, spiffs_file fh, void *buf, s32_t chunk_no, s32_t chunk_len, void (*notify_handle)(void*, void*), void* notify_data) {
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
spiffs_fd *fd;
s32_t res;
s32_t len = chunk_no * chunk_len;
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
if ((fd->flags & SPIFFS_RDONLY) == 0) {
res = SPIFFS_ERR_NOT_READABLE;
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
}
if (fd->size == SPIFFS_UNDEFINED_LEN && len > 0) {
// special case for zero sized files
res = SPIFFS_ERR_END_OF_OBJECT;
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
}
#if SPIFFS_CACHE_WR
spiffs_fflush_cache(fs, fh);
#endif
if (fd->fdoffset + len >= fd->size) {
// reading beyond file size
s32_t avail = fd->size - fd->fdoffset;
if (avail <= 0) {
SPIFFS_API_CHECK_RES_UNLOCK(fs, SPIFFS_ERR_END_OF_OBJECT);
}
res = spiffs_object_read_notify(fd, fd->fdoffset, avail, buf, chunk_len, notify_handle, notify_data);
if (res == SPIFFS_ERR_END_OF_OBJECT) {
fd->fdoffset += avail;
SPIFFS_UNLOCK(fs);
return avail;
} else {
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
len = avail;
}
} else {
// reading within file size
res = spiffs_object_read_notify(fd, fd->fdoffset, len, buf, chunk_len, notify_handle, notify_data);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
}
fd->fdoffset += len;
SPIFFS_UNLOCK(fs);
return len;
}
s32_t SPIFFS_fflush(spiffs *fs, spiffs_file fh) {
(void)fh;
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
s32_t res = SPIFFS_OK;
#if !SPIFFS_READ_ONLY && SPIFFS_CACHE_WR
SPIFFS_LOCK(fs);
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fflush_cache(fs, fh);
SPIFFS_API_CHECK_RES_UNLOCK(fs,res);
SPIFFS_UNLOCK(fs);
#endif
return res;
}
s32_t SPIFFS_lseek(spiffs *fs, spiffs_file fh, s32_t offs, int whence) {
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
spiffs_fd *fd;
s32_t res;
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES(fs, res);
#if SPIFFS_CACHE_WR
spiffs_fflush_cache(fs, fh);
#endif
switch (whence) {
case SPIFFS_SEEK_CUR:
offs = fd->fdoffset+offs;
break;
case SPIFFS_SEEK_END:
offs = (fd->size == SPIFFS_UNDEFINED_LEN ? 0 : fd->size) + offs;
break;
}
if ((offs > (s32_t)fd->size) && (SPIFFS_UNDEFINED_LEN != fd->size)) {
res = SPIFFS_ERR_END_OF_OBJECT;
}
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
spiffs_span_ix data_spix = offs / SPIFFS_DATA_PAGE_SIZE(fs);
spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix);
if (fd->cursor_objix_spix != objix_spix) {
spiffs_page_ix pix;
res = spiffs_obj_lu_find_id_and_span(
fs, fd->obj_id | SPIFFS_OBJ_ID_IX_FLAG, objix_spix, 0, &pix);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
fd->cursor_objix_spix = objix_spix;
fd->cursor_objix_pix = pix;
}
fd->fdoffset = offs;
SPIFFS_UNLOCK(fs);
return offs;
}
s32_t SPIFFS_close(spiffs *fs, spiffs_file fh) {
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
s32_t res = SPIFFS_OK;
SPIFFS_LOCK(fs);
fh = SPIFFS_FH_UNOFFS(fs, fh);
#if SPIFFS_CACHE
res = spiffs_fflush_cache(fs, fh);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#endif
res = spiffs_fd_return(fs, fh);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
SPIFFS_UNLOCK(fs);
return res;
}
s32_t SPIFFS_fstat(spiffs *fs, spiffs_file fh, spiffs_stat *s) {
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
spiffs_fd *fd;
s32_t res;
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#if SPIFFS_CACHE_WR
spiffs_fflush_cache(fs, fh);
#endif
res = spiffs_stat_pix(fs, fd->objix_hdr_pix, fh, s);
SPIFFS_UNLOCK(fs);
return res;
}
s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh) {
s32_t res;
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
fh = SPIFFS_FH_UNOFFS(fs, fh);
spiffs_fd *fd;
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#if SPIFFS_CACHE_WR
res = spiffs_fflush_cache(fs, fh);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#endif
res = fd->fdoffset;
SPIFFS_UNLOCK(fs);
return res;
}
s32_t SPIFFS_eof(spiffs *fs, spiffs_file fh) {
s32_t res;
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
fh = SPIFFS_FH_UNOFFS(fs, fh);
spiffs_fd *fd;
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#if SPIFFS_CACHE_WR
res = spiffs_fflush_cache(fs, fh);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#endif
res = (fd->fdoffset >= (fd->size == SPIFFS_UNDEFINED_LEN ? 0 : fd->size));
SPIFFS_UNLOCK(fs);
return res;
}
s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, void *buf, s32_t len) {
#if SPIFFS_READ_ONLY
(void)fs; (void)fh; (void)buf; (void)len;
return SPIFFS_ERR_RO_NOT_IMPL;
#else
SPIFFS_API_CHECK_CFG(fs);
SPIFFS_API_CHECK_MOUNT(fs);
SPIFFS_LOCK(fs);
spiffs_fd *fd;
s32_t res;
u32_t offset;
fh = SPIFFS_FH_UNOFFS(fs, fh);
res = spiffs_fd_get(fs, fh, &fd);
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
if ((fd->flags & SPIFFS_O_WRONLY) == 0) {
res = SPIFFS_ERR_NOT_WRITABLE;
SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
}
if ((fd->flags & SPIFFS_O_APPEND)) {
fd->fdoffset = fd->size == SPIFFS_UNDEFINED_LEN ? 0 : fd->size;
}
offset = fd->fdoffset;
#if SPIFFS_CACHE_WR
if (fd->cache_page == 0) {
// see if object id is associated with cache already
fd->cache_page = spiffs_cache_page_get_by_fd(fs, fd);
}
#endif
if (fd->flags & SPIFFS_O_APPEND) {
if (fd->size == SPIFFS_UNDEFINED_LEN) {
offset = 0;
} else {
offset = fd->size;
}
#if SPIFFS_CACHE_WR
if (fd->cache_page) {
offset = MAX(offset, fd->cache_page->offset + fd->cache_page->size);
}
#endif
}
#if SPIFFS_CACHE_WR
if ((fd->flags & SPIFFS_O_DIRECT) == 0) {
if (len < (s32_t)SPIFFS_CFG_LOG_PAGE_SZ(fs)) {
// small write, try to cache it
u8_t alloc_cpage = 1;
if (fd->cache_page) {
// have a cached page for this fd already, check cache page boundaries
if (offset < fd->cache_page->offset || // writing before cache
offset > fd->cache_page->offset + fd->cache_page->size || // writing after cache
offset + len > fd->cache_page->offset + SPIFFS_CFG_LOG_PAGE_SZ(fs)) // writing beyond cache page
{
// boundary violation, write back cache first and allocate new
SPIFFS_CACHE_DBG("CACHE_WR_DUMP: dumping cache page %i for fd %i:%04x, boundary viol, offs:%i size:%i\n",
fd->cache_page->ix, fd->file_nbr, fd->obj_id, fd->cache_page->offset, fd->cache_page->size);
res = spiffs_hydro_write(fs, fd,
spiffs_get_cache_page(fs, spiffs_get_cache(fs), fd->cache_page->ix),
fd->cache_page->offset, fd->cache_page->size);
spiffs_cache_fd_release(fs, fd->cache_page);
SPIFFS_API_CHECK_RES(fs, res);
} else {
// writing within cache
alloc_cpage = 0;
}
}
if (alloc_cpage) {
fd->cache_page = spiffs_cache_page_allocate_by_fd(fs, fd);
if (fd->cache_page) {
fd->cache_page->offset = offset;
fd->cache_page->size = 0;
SPIFFS_CACHE_DBG("CACHE_WR_ALLO: allocating cache page %i for fd %i:%04x\n",
fd->cache_page->ix, fd->file_nbr, fd->obj_id);
}
}
if (fd->cache_page) {
u32_t offset_in_cpage = offset - fd->cache_page->offset;
SPIFFS_CACHE_DBG("CACHE_WR_WRITE: storing to cache page %i for fd %i:%04x, offs %i:%i len %i\n",
fd->cache_page->ix, fd->file_nbr, fd->obj_id,
offset, offset_in_cpage, len);
spiffs_cache *cache = spiffs_get_cache(fs);
u8_t *cpage_data = spiffs_get_cache_page(fs, cache, fd->cache_page->ix);
memcpy(&cpage_data[offset_in_cpage], buf, len);
fd->cache_page->size = MAX(fd->cache_page->size, offset_in_cpage + len);
fd->fdoffset += len;
SPIFFS_UNLOCK(fs);
return len;
} else {
res = spiffs_hydro_write(fs, fd, buf, offset, len);
SPIFFS_API_CHECK_RES(fs, res);
fd->fdoffset += len;
SPIFFS_UNLOCK(fs);
return res;
}
} else {
// big write, no need to cache it - but first check if there is a cached write already
if (fd->cache_page) {
// write back cache first
SPIFFS_CACHE_DBG("CACHE_WR_DUMP: dumping cache page %i for fd %i:%04x, big write, offs:%i size:%i\n",
fd->cache_page->ix, fd->file_nbr, fd->obj_id, fd->cache_page->offset, fd->cache_page->size);
res = spiffs_hydro_write(fs, fd,
spiffs_get_cache_page(fs, spiffs_get_cache(fs), fd->cache_page->ix),
fd->cache_page->offset, fd->cache_page->size);
spiffs_cache_fd_release(fs, fd->cache_page);
SPIFFS_API_CHECK_RES(fs, res);
res = spiffs_hydro_write(fs, fd, buf, offset, len);
SPIFFS_API_CHECK_RES(fs, res);
}
}
}
#endif
res = spiffs_hydro_write(fs, fd, buf, offset, len);
SPIFFS_API_CHECK_RES(fs, res);
fd->fdoffset += len;
SPIFFS_UNLOCK(fs);
return res;
#endif // SPIFFS_READ_ONLY
}
