From f2cff39f276b16ca2240a7a11b9ccfd7a8eac42c Mon Sep 17 00:00:00 2001
From: Lucjan Bryndza <lucjan.bryndza@mudita.com>
Date: Thu, 28 Jan 2021 14:03:35 +0100
Subject: [PATCH] [EGD-5515] Remove unused code lfxextension

Remove unused code for detecting block size from user blocks
---
 .../include/littlefs/lfs_extension.h          | 29 --------
 .../lfsfs/lfsextension/src/lfs_extension.c    | 67 -------------------
 2 files changed, 96 deletions(-)
 delete mode 100644 module-vfs/thirdparty/lfsfs/lfsextension/include/littlefs/lfs_extension.h
 delete mode 100644 module-vfs/thirdparty/lfsfs/lfsextension/src/lfs_extension.c

diff --git a/module-vfs/thirdparty/lfsfs/lfsextension/include/littlefs/lfs_extension.h b/module-vfs/thirdparty/lfsfs/lfsextension/include/littlefs/lfs_extension.h
deleted file mode 100644
index a352361b83da2805c273aae9ddac64fdd030c2c3..0000000000000000000000000000000000000000
--- a/module-vfs/thirdparty/lfsfs/lfsextension/include/littlefs/lfs_extension.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright (c) 2017-2020, Mudita Sp. z.o.o. All rights reserved.
-// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
-
-/* NOTE: Currently littlefs doesn't support auto detecting block_size and block_count
- * basing on the data stored in the the super block of formatted filesystem.
- * It expect data passed during filesystem initialization.
- * This extension implements really naive algorithm for finding first
- *superblock entry and read block_size and blocks count from the super block
- */
-
-#pragma once
-
-#include <littlefs/lfs.h>
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-    /**
-     * Try to setup config structure based on the superblock information
-     * @param cfg LFS config structure
-     * @return 0 or success otherwise error
-     */
-    int lfs_extension_read_config_from_superblock(struct lfs_config *cfg, size_t sector_size)
-        __attribute__((nonnull(1)));
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/module-vfs/thirdparty/lfsfs/lfsextension/src/lfs_extension.c b/module-vfs/thirdparty/lfsfs/lfsextension/src/lfs_extension.c
deleted file mode 100644
index 4d1920d86ce90a1d6afca9747b5920ecfeaa82cc..0000000000000000000000000000000000000000
--- a/module-vfs/thirdparty/lfsfs/lfsextension/src/lfs_extension.c
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright (c) 2017-2020, Mudita Sp. z.o.o. All rights reserved.
-// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
-
-#include <littlefs/lfs_extension.h>
-
-static inline void lfs_superblock_fromle32(lfs_superblock_t *superblock)
-{
-    superblock->version     = lfs_fromle32(superblock->version);
-    superblock->block_size  = lfs_fromle32(superblock->block_size);
-    superblock->block_count = lfs_fromle32(superblock->block_count);
-    superblock->name_max    = lfs_fromle32(superblock->name_max);
-    superblock->file_max    = lfs_fromle32(superblock->file_max);
-    superblock->attr_max    = lfs_fromle32(superblock->attr_max);
-}
-
-static void *memstr(const void *mem, size_t memsize, const char *str)
-{
-    const size_t findstr_len = strlen(str);
-    const uint8_t *memu8p    = mem;
-    if (findstr_len > memsize) {
-        return NULL;
-    }
-    uint8_t *match = memchr(memu8p, str[0], memsize);
-    if (match != NULL) {
-        size_t remaining = memsize - ((uint8_t *)match - memu8p);
-        if (findstr_len <= remaining) {
-            if (memcmp(match, str, findstr_len) == 0) {
-                return match;
-            }
-        }
-    }
-    return NULL;
-}
-
-int lfs_extension_read_config_from_superblock(struct lfs_config *cfg, size_t sector_size)
-{
-    uint8_t sect_buf[sector_size] __attribute__((aligned));
-    if (!cfg->read) {
-        return LFS_ERR_IO;
-    }
-    lfs_superblock_t *lfs_superblock;
-    if (sector_size <= sizeof(*lfs_superblock)) {
-        return LFS_ERR_IO;
-    }
-    lfs_size_t block_size_saved = cfg->block_size;
-    int err                     = cfg->read(cfg, 0, 0, sect_buf, sector_size);
-    cfg->block_size             = block_size_saved;
-    if (err) {
-        return err;
-    }
-    const uint8_t *ptr = memstr(sect_buf, sizeof sect_buf, "littlefs");
-    if (!ptr) {
-        return LFS_ERR_NOENT;
-    }
-    lfs_superblock = (lfs_superblock_t *)(ptr + 12);
-    lfs_superblock_fromle32(lfs_superblock);
-    // check version
-    uint16_t major_version = (0xffff & (lfs_superblock->version >> 16));
-    uint16_t minor_version = (0xffff & (lfs_superblock->version >> 0));
-    if ((major_version != LFS_DISK_VERSION_MAJOR || minor_version > LFS_DISK_VERSION_MINOR)) {
-        LFS_ERROR("Invalid version v%" PRIu16 ".%" PRIu16, major_version, minor_version);
-        return LFS_ERR_INVAL;
-    }
-    cfg->block_size  = lfs_superblock->block_size;
-    cfg->block_count = lfs_superblock->block_count;
-    return LFS_ERR_OK;
-}