mirror of https://github.com/ArduPilot/ardupilot
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "AP_Filesystem_backend.h"
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#include "AP_Filesystem_config.h"
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#if AP_FILESYSTEM_SYS_ENABLED
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class ExpandingString;
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class AP_Filesystem_Sys : public AP_Filesystem_Backend
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{
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public:
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// functions that closely match the equivalent posix calls
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int open(const char *fname, int flags, bool allow_absolute_paths = false) override;
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int close(int fd) override;
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int32_t read(int fd, void *buf, uint32_t count) override;
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int32_t lseek(int fd, int32_t offset, int whence) override;
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int stat(const char *pathname, struct stat *stbuf) override;
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void *opendir(const char *pathname) override;
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struct dirent *readdir(void *dirp) override;
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int closedir(void *dirp) override;
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private:
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// only allow up to 4 files at a time
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static constexpr uint8_t max_open_file = 4;
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int8_t file_in_sysfs(const char *fname);
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struct DirReadTracker {
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size_t file_offset;
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struct dirent curr_file;
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};
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struct rfile {
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bool open;
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uint32_t file_ofs;
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ExpandingString *str;
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} file[max_open_file];
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};
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#endif // AP_FILESYSTEM_SYS_ENABLED
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