31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
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// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "esp_vfs_fat.h"
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#include <sys/param.h>
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#include <stddef.h>
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static inline size_t esp_vfs_fat_get_allocation_unit_size(
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size_t sector_size, size_t requested_size)
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{
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size_t alloc_unit_size = requested_size;
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const size_t max_sectors_per_cylinder = 128;
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const size_t max_size = sector_size * max_sectors_per_cylinder;
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alloc_unit_size = MAX(alloc_unit_size, sector_size);
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alloc_unit_size = MIN(alloc_unit_size, max_size);
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return alloc_unit_size;
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}
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