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70 lines
2.4 KiB
70 lines
2.4 KiB
/* |
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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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class AP_Filesystem_ROMFS : 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 write(int fd, const void *buf, uint32_t count) override; |
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int fsync(int fd) 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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int unlink(const char *pathname) override; |
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int mkdir(const char *pathname) 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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// return free disk space in bytes, -1 on error |
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int64_t disk_free(const char *path) override; |
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// return total disk space in bytes, -1 on error |
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int64_t disk_space(const char *path) override; |
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// set modification time on a file |
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bool set_mtime(const char *filename, const uint32_t mtime_sec) override; |
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/* |
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load a full file. Use delete to free the data |
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*/ |
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FileData *load_file(const char *filename) override; |
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// unload data from load_file() |
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void unload_file(FileData *fd) 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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static constexpr uint8_t max_open_dir = 4; |
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struct rfile { |
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const uint8_t *data; |
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uint32_t size; |
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uint32_t ofs; |
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} file[max_open_file]; |
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// allow up to 4 directory opens |
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struct rdir { |
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char *path; |
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uint16_t ofs; |
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struct dirent de; |
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} dir[max_open_dir]; |
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};
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