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78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2013-2024 OpenMV, LLC.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* Filesystem helper functions using MicroPython VFS interface.
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*/
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#ifndef __FILE_UTILS_H__
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#define __FILE_UTILS_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include "py/obj.h"
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// File handle that wraps a MicroPython file object
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// Replaces FatFS FIL type with VFS-agnostic abstraction
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typedef struct {
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mp_obj_t fp; // MicroPython file object
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uint8_t flags; // Open mode flags (FA_READ, FA_WRITE, etc.)
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} file_t;
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// FatFS-compatible mode flags for backward compatibility
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#define FA_READ 0x01
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#define FA_WRITE 0x02
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#define FA_OPEN_EXISTING 0x00
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#define FA_CREATE_NEW 0x04
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#define FA_CREATE_ALWAYS 0x08
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#define FA_OPEN_ALWAYS 0x10
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#define FA_OPEN_APPEND 0x30
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// Error/exception functions
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void file_raise_format(file_t *fp);
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void file_raise_corrupted(file_t *fp);
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void file_raise_error(file_t *fp, mp_rom_error_text_t msg);
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// File buffer functions
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void file_buffer_init0();
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void file_buffer_on(file_t *fp); // Calls fb_alloc_all()
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void file_buffer_off(file_t *fp); // Calls fb_free()
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// File operations
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void file_open(file_t *fp, const char *path, bool buffered, uint32_t flags);
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void file_close(file_t *fp);
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void file_seek(file_t *fp, size_t offset);
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void file_truncate(file_t *fp);
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void file_sync(file_t *fp);
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size_t file_tell(file_t *fp);
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size_t file_size(file_t *fp);
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bool file_eof(file_t *fp);
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// Buffered read/write operations
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void file_read(file_t *fp, void *data, size_t size);
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void file_write(file_t *fp, const void *data, size_t size);
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void file_write_byte(file_t *fp, uint8_t value);
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void file_write_short(file_t *fp, uint16_t value);
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void file_write_long(file_t *fp, uint32_t value);
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void file_read_check(file_t *fp, const void *data, size_t size);
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#endif /* __FILE_UTILS_H__ */
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