afa659732e
Limitations: Only supports simple 8.3 file names Cannot create with size > 0 Timestamp is bogus
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
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* Copyright (c) 2022 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#pragma once
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#include <inttypes.h>
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#include "fat_fs.h"
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#include "fat_priv.h"
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class fat_fs;
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class fat_file {
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public:
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explicit fat_file(fat_fs *f);
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virtual ~fat_file();
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const dir_entry_location &dir_loc() const { return dir_loc_; }
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bool is_dir() const { return attributes_ == fat_attribute::directory; }
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// top level fs hooks
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static status_t open_file(fscookie *cookie, const char *path, filecookie **fcookie);
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static ssize_t read_file(filecookie *fcookie, void *_buf, const off_t offset, size_t len);
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static status_t stat_file(filecookie *fcookie, struct file_stat *stat);
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static status_t close_file(filecookie *fcookie);
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static status_t create_file(fscookie *cookie, const char *path, filecookie **fcookie, uint64_t len);
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// used by fs node list maintenance
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// node in the fs's list of open files and dirs
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list_node node_ = LIST_INITIAL_CLEARED_VALUE;
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private:
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// private versions of the above
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status_t open_file_priv(const dir_entry &entry, const dir_entry_location &loc);
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ssize_t read_file_priv(void *_buf, const off_t offset, size_t len);
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status_t stat_file_priv(struct file_stat *stat);
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status_t close_file_priv(bool *last_ref);
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protected:
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// increment the ref and add/remove the file from the fs list
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void inc_ref();
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bool dec_ref(); // returns true when ref reaches zero
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// members
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int ref_ = 0;
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fat_fs *fs_ = nullptr; // pointer back to the fs instance we're in
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// pointer to our dir entry, acts as our unique key in the fs list
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dir_entry_location dir_loc_ {};
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// our start cluster and length
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uint32_t start_cluster_ = 0;
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uint32_t length_ = 0;
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// saved attributes from our dir entry
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fat_attribute attributes_ = fat_attribute(0);
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};
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