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64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/**
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* @file fat32.h
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* A very basic FAT32 reading implementation
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* This only supports reading files in the root directory. Currently, the files
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* must also have a name under eight characters, with no extension.
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*
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* Copyright (C) 2018 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef FAT32_H_
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#define FAT32_H_
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#include <stdint.h>
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/**
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* A structure to store important information for loading a file.
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*/
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typedef struct {
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uint32_t size; /**< The file's size in bytes */
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uint32_t start; /**< The file's first data cluster */
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} file_t;
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/**
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* Finds a FAT partition on the SD card.
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* @return non-zero if partition found
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*/
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int fat_find(void);
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/**
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* Searches for the given file, returning necessary information to use it.
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* @param name the file's name
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* @return a file data structure, null if not found
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*/
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file_t *fat_findfile(const char *name);
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/**
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* Reads given file into an allocated buffer.
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* @param file the file's data structure from fat_findfile()
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* @return a malloc'd buffer containing the file's data
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*/
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char *fat_readfile(file_t *file);
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/**
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* Gets the name of the nth file in the root directory.
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* @param index n, the index of the file
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* @return the file's name, in a malloc'd buffer
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*/
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char *fat_getname(uint32_t index);
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#endif // FAT32_H_
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