390 lines
13 KiB
C++
390 lines
13 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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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 <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* \file
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* \brief SdBaseFile class
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*/
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/**
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* Arduino SdFat Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino Sd2Card Library
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*/
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#ifndef _SDBASEFILE_H_
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#define _SDBASEFILE_H_
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#include "SdFatConfig.h"
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#include "SdVolume.h"
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#include <stdint.h>
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/**
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* \struct filepos_t
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* \brief internal type for istream
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* do not use in user apps
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*/
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struct filepos_t {
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uint32_t position; // stream byte position
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uint32_t cluster; // cluster of position
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filepos_t() : position(0), cluster(0) {}
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};
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// use the gnu style oflag in open()
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uint8_t const O_READ = 0x01, // open() oflag for reading
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O_RDONLY = O_READ, // open() oflag - same as O_IN
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O_WRITE = 0x02, // open() oflag for write
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O_WRONLY = O_WRITE, // open() oflag - same as O_WRITE
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O_RDWR = (O_READ | O_WRITE), // open() oflag for reading and writing
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O_ACCMODE = (O_READ | O_WRITE), // open() oflag mask for access modes
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O_APPEND = 0x04, // The file offset shall be set to the end of the file prior to each write.
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O_SYNC = 0x08, // Synchronous writes - call sync() after each write
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O_TRUNC = 0x10, // Truncate the file to zero length
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O_AT_END = 0x20, // Set the initial position at the end of the file
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O_CREAT = 0x40, // Create the file if nonexistent
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O_EXCL = 0x80; // If O_CREAT and O_EXCL are set, open() shall fail if the file exists
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// SdBaseFile class static and const definitions
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// flags for ls()
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uint8_t const LS_DATE = 1, // ls() flag to print modify date
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LS_SIZE = 2, // ls() flag to print file size
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LS_R = 4; // ls() flag for recursive list of subdirectories
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// flags for timestamp
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uint8_t const T_ACCESS = 1, // Set the file's last access date
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T_CREATE = 2, // Set the file's creation date and time
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T_WRITE = 4; // Set the file's write date and time
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// values for type_
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uint8_t const FAT_FILE_TYPE_CLOSED = 0, // This file has not been opened.
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FAT_FILE_TYPE_NORMAL = 1, // A normal file
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FAT_FILE_TYPE_ROOT_FIXED = 2, // A FAT12 or FAT16 root directory
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FAT_FILE_TYPE_ROOT32 = 3, // A FAT32 root directory
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FAT_FILE_TYPE_SUBDIR = 4, // A subdirectory file
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FAT_FILE_TYPE_MIN_DIR = FAT_FILE_TYPE_ROOT_FIXED; // Test value for directory type
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/**
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* date field for FAT directory entry
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* \param[in] year [1980,2107]
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* \param[in] month [1,12]
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* \param[in] day [1,31]
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*
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* \return Packed date for dir_t entry.
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*/
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static inline uint16_t FAT_DATE(uint16_t year, uint8_t month, uint8_t day) { return (year - 1980) << 9 | month << 5 | day; }
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/**
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* year part of FAT directory date field
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* \param[in] fatDate Date in packed dir format.
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*
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* \return Extracted year [1980,2107]
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*/
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static inline uint16_t FAT_YEAR(uint16_t fatDate) { return 1980 + (fatDate >> 9); }
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/**
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* month part of FAT directory date field
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* \param[in] fatDate Date in packed dir format.
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*
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* \return Extracted month [1,12]
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*/
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static inline uint8_t FAT_MONTH(uint16_t fatDate) { return (fatDate >> 5) & 0XF; }
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/**
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* day part of FAT directory date field
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* \param[in] fatDate Date in packed dir format.
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*
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* \return Extracted day [1,31]
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*/
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static inline uint8_t FAT_DAY(uint16_t fatDate) { return fatDate & 0x1F; }
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/**
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* time field for FAT directory entry
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* \param[in] hour [0,23]
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* \param[in] minute [0,59]
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* \param[in] second [0,59]
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*
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* \return Packed time for dir_t entry.
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*/
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static inline uint16_t FAT_TIME(uint8_t hour, uint8_t minute, uint8_t second) { return hour << 11 | minute << 5 | second >> 1; }
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/**
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* hour part of FAT directory time field
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* \param[in] fatTime Time in packed dir format.
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*
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* \return Extracted hour [0,23]
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*/
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static inline uint8_t FAT_HOUR(uint16_t fatTime) { return fatTime >> 11; }
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/**
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* minute part of FAT directory time field
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* \param[in] fatTime Time in packed dir format.
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*
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* \return Extracted minute [0,59]
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*/
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static inline uint8_t FAT_MINUTE(uint16_t fatTime) { return (fatTime >> 5) & 0x3F; }
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/**
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* second part of FAT directory time field
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* Note second/2 is stored in packed time.
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*
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* \param[in] fatTime Time in packed dir format.
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*
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* \return Extracted second [0,58]
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*/
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static inline uint8_t FAT_SECOND(uint16_t fatTime) { return 2 * (fatTime & 0x1F); }
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// Default date for file timestamps is 1 Jan 2000
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uint16_t const FAT_DEFAULT_DATE = ((2000 - 1980) << 9) | (1 << 5) | 1;
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// Default time for file timestamp is 1 am
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uint16_t const FAT_DEFAULT_TIME = (1 << 11);
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/**
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* \class SdBaseFile
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* \brief Base class for SdFile with Print and C++ streams.
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*/
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class SdBaseFile {
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public:
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SdBaseFile() : writeError(false), type_(FAT_FILE_TYPE_CLOSED) {}
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SdBaseFile(const char* path, uint8_t oflag);
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~SdBaseFile() { if (isOpen()) close(); }
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/**
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* writeError is set to true if an error occurs during a write().
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* Set writeError to false before calling print() and/or write() and check
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* for true after calls to print() and/or write().
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*/
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bool writeError;
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// helpers for stream classes
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/**
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* get position for streams
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* \param[out] pos struct to receive position
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*/
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void getpos(filepos_t* pos);
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/**
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* set position for streams
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* \param[out] pos struct with value for new position
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*/
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void setpos(filepos_t* pos);
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bool close();
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bool contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
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bool createContiguous(SdBaseFile* dirFile,
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const char* path, uint32_t size);
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/**
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* \return The current cluster number for a file or directory.
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*/
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uint32_t curCluster() const { return curCluster_; }
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/**
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* \return The current position for a file or directory.
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*/
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uint32_t curPosition() const { return curPosition_; }
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/**
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* \return Current working directory
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*/
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static SdBaseFile* cwd() { return cwd_; }
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/**
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* Set the date/time callback function
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*
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* \param[in] dateTime The user's call back function. The callback
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* function is of the form:
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*
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* \code
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* void dateTime(uint16_t* date, uint16_t* time) {
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* uint16_t year;
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* uint8_t month, day, hour, minute, second;
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*
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* // User gets date and time from GPS or real-time clock here
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*
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* // return date using FAT_DATE macro to format fields
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* *date = FAT_DATE(year, month, day);
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*
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* // return time using FAT_TIME macro to format fields
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* *time = FAT_TIME(hour, minute, second);
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* }
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* \endcode
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*
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* Sets the function that is called when a file is created or when
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* a file's directory entry is modified by sync(). All timestamps,
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* access, creation, and modify, are set when a file is created.
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* sync() maintains the last access date and last modify date/time.
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*
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* See the timestamp() function.
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*/
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static void dateTimeCallback(
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void (*dateTime)(uint16_t* date, uint16_t* time)) {
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dateTime_ = dateTime;
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}
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/**
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* Cancel the date/time callback function.
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*/
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static void dateTimeCallbackCancel() { dateTime_ = 0; }
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bool dirEntry(dir_t* dir);
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static void dirName(const dir_t& dir, char* name);
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bool exists(const char* name);
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int16_t fgets(char* str, int16_t num, char* delim = 0);
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/**
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* \return The total number of bytes in a file or directory.
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*/
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uint32_t fileSize() const { return fileSize_; }
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/**
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* \return The first cluster number for a file or directory.
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*/
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uint32_t firstCluster() const { return firstCluster_; }
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/**
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* \return True if this is a directory else false.
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*/
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bool isDir() const { return type_ >= FAT_FILE_TYPE_MIN_DIR; }
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/**
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* \return True if this is a normal file else false.
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*/
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bool isFile() const { return type_ == FAT_FILE_TYPE_NORMAL; }
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/**
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* \return True if this is an open file/directory else false.
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*/
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bool isOpen() const { return type_ != FAT_FILE_TYPE_CLOSED; }
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/**
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* \return True if this is a subdirectory else false.
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*/
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bool isSubDir() const { return type_ == FAT_FILE_TYPE_SUBDIR; }
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/**
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* \return True if this is the root directory.
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*/
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bool isRoot() const { return type_ == FAT_FILE_TYPE_ROOT_FIXED || type_ == FAT_FILE_TYPE_ROOT32; }
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bool getFilename(char * const name);
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void ls(uint8_t flags = 0, uint8_t indent = 0);
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bool mkdir(SdBaseFile* dir, const char* path, bool pFlag = true);
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bool open(SdBaseFile* dirFile, uint16_t index, uint8_t oflag);
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bool open(SdBaseFile* dirFile, const char* path, uint8_t oflag);
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bool open(const char* path, uint8_t oflag = O_READ);
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bool openNext(SdBaseFile* dirFile, uint8_t oflag);
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bool openRoot(SdVolume* vol);
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int peek();
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static void printFatDate(uint16_t fatDate);
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static void printFatTime(uint16_t fatTime);
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bool printName();
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int16_t read();
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int16_t read(void* buf, uint16_t nbyte);
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int8_t readDir(dir_t* dir, char* longFilename);
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static bool remove(SdBaseFile* dirFile, const char* path);
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bool remove();
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/**
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* Set the file's current position to zero.
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*/
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void rewind() { seekSet(0); }
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bool rename(SdBaseFile* dirFile, const char* newPath);
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bool rmdir();
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bool rmRfStar();
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/**
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* Set the files position to current position + \a pos. See seekSet().
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* \param[in] offset The new position in bytes from the current position.
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* \return true for success or false for failure.
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*/
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bool seekCur(const int32_t offset) { return seekSet(curPosition_ + offset); }
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/**
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* Set the files position to end-of-file + \a offset. See seekSet().
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* \param[in] offset The new position in bytes from end-of-file.
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* \return true for success or false for failure.
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*/
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bool seekEnd(const int32_t offset = 0) { return seekSet(fileSize_ + offset); }
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bool seekSet(const uint32_t pos);
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bool sync();
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bool timestamp(SdBaseFile* file);
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bool timestamp(uint8_t flag, uint16_t year, uint8_t month, uint8_t day,
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uint8_t hour, uint8_t minute, uint8_t second);
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/**
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* Type of file. Use isFile() or isDir() instead of type() if possible.
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*
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* \return The file or directory type.
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*/
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uint8_t type() const { return type_; }
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bool truncate(uint32_t size);
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/**
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* \return SdVolume that contains this file.
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*/
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SdVolume* volume() const { return vol_; }
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int16_t write(const void* buf, uint16_t nbyte);
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private:
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friend class SdFat; // allow SdFat to set cwd_
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static SdBaseFile* cwd_; // global pointer to cwd dir
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// data time callback function
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static void (*dateTime_)(uint16_t* date, uint16_t* time);
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// bits defined in flags_
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static uint8_t const F_OFLAG = (O_ACCMODE | O_APPEND | O_SYNC), // should be 0x0F
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F_FILE_DIR_DIRTY = 0x80; // sync of directory entry required
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// private data
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uint8_t flags_; // See above for definition of flags_ bits
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uint8_t fstate_; // error and eof indicator
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uint8_t type_; // type of file see above for values
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uint32_t curCluster_; // cluster for current file position
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uint32_t curPosition_; // current file position in bytes from beginning
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uint32_t dirBlock_; // block for this files directory entry
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uint8_t dirIndex_; // index of directory entry in dirBlock
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uint32_t fileSize_; // file size in bytes
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uint32_t firstCluster_; // first cluster of file
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SdVolume* vol_; // volume where file is located
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/**
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* EXPERIMENTAL - Don't use!
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*/
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//bool openParent(SdBaseFile* dir);
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// private functions
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bool addCluster();
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bool addDirCluster();
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dir_t* cacheDirEntry(uint8_t action);
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int8_t lsPrintNext(uint8_t flags, uint8_t indent);
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static bool make83Name(const char* str, uint8_t* name, const char** ptr);
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bool mkdir(SdBaseFile* parent, const uint8_t dname[11]);
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bool open(SdBaseFile* dirFile, const uint8_t dname[11], uint8_t oflag);
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bool openCachedEntry(uint8_t cacheIndex, uint8_t oflags);
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dir_t* readDirCache();
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};
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#endif // _SDBASEFILE_H_
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