C++ (Cpp) spiffs_object_read Exemples

Exemple #1

Fichier : spiffs_hydrogen.c Projet : loboris/spiffs

s32_t SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, s32_t len) {
  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_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(fd, fd->fdoffset, avail, (u8_t*)buf);
    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(fd, fd->fdoffset, len, (u8_t*)buf);
    SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
  }
  fd->fdoffset += len;

  SPIFFS_UNLOCK(fs);

  return len;
}

Exemple #2

Fichier : spiffs_hydrogen.c Projet : StephanHaag/esp8266-devkit

s32_t ICACHE_FLASH_ATTR SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, u32_t len) {
  SPIFFS_API_CHECK_MOUNT(fs);
  SPIFFS_LOCK(fs);

  spiffs_fd *fd;
  s32_t res;

  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 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(fd, fd->fdoffset, avail, (u8_t*)buf);
    if (res == SPIFFS_OK) {
      fd->fdoffset += avail;
      SPIFFS_UNLOCK(fs);
      return avail;
    } else {
      SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
    }
  } else {
    // reading within file size
    res = spiffs_object_read(fd, fd->fdoffset, len, (u8_t*)buf);
    SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
  }
  fd->fdoffset += len;

  SPIFFS_UNLOCK(fs);

  return len;
}