481 lines
18 KiB
C++
481 lines
18 KiB
C++
/* 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 SdFat Library
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*
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* This Library 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 Library 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 the Arduino SdFat Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SdBaseFile_h
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#define SdBaseFile_h
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/**
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* \file
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* \brief SdBaseFile class
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*/
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#include "SdFatConfig.h"
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#include "SdVolume.h"
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//------------------------------------------------------------------------------
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/**
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* \struct fpos_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 fpos_t {
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/** stream position */
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uint32_t position;
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/** cluster for position */
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uint32_t cluster;
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fpos_t() : position(0), cluster(0) {}
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};
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// use the gnu style oflag in open()
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/** open() oflag for reading */
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uint8_t const O_READ = 0X01;
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/** open() oflag - same as O_IN */
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uint8_t const O_RDONLY = O_READ;
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/** open() oflag for write */
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uint8_t const O_WRITE = 0X02;
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/** open() oflag - same as O_WRITE */
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uint8_t const O_WRONLY = O_WRITE;
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/** open() oflag for reading and writing */
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uint8_t const O_RDWR = (O_READ | O_WRITE);
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/** open() oflag mask for access modes */
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uint8_t const O_ACCMODE = (O_READ | O_WRITE);
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/** The file offset shall be set to the end of the file prior to each write. */
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uint8_t const O_APPEND = 0X04;
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/** synchronous writes - call sync() after each write */
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uint8_t const O_SYNC = 0X08;
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/** truncate the file to zero length */
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uint8_t const O_TRUNC = 0X10;
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/** set the initial position at the end of the file */
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uint8_t const O_AT_END = 0X20;
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/** create the file if nonexistent */
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uint8_t const O_CREAT = 0X40;
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/** If O_CREAT and O_EXCL are set, open() shall fail if the file exists */
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uint8_t const O_EXCL = 0X80;
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// SdBaseFile class static and const definitions
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// flags for ls()
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/** ls() flag to print modify date */
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uint8_t const LS_DATE = 1;
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/** ls() flag to print file size */
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uint8_t const LS_SIZE = 2;
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/** ls() flag for recursive list of subdirectories */
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uint8_t const LS_R = 4;
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// flags for timestamp
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/** set the file's last access date */
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uint8_t const T_ACCESS = 1;
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/** set the file's creation date and time */
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uint8_t const T_CREATE = 2;
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/** Set the file's write date and time */
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uint8_t const T_WRITE = 4;
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// values for type_
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/** This file has not been opened. */
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uint8_t const FAT_FILE_TYPE_CLOSED = 0;
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/** A normal file */
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uint8_t const FAT_FILE_TYPE_NORMAL = 1;
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/** A FAT12 or FAT16 root directory */
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uint8_t const FAT_FILE_TYPE_ROOT_FIXED = 2;
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/** A FAT32 root directory */
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uint8_t const FAT_FILE_TYPE_ROOT32 = 3;
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/** A subdirectory file*/
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uint8_t const FAT_FILE_TYPE_SUBDIR = 4;
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/** Test value for directory type */
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uint8_t const FAT_FILE_TYPE_MIN_DIR = FAT_FILE_TYPE_ROOT_FIXED;
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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) {
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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) {
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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) {
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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) {
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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) {
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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) {
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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) {
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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) {
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return 2*(fatTime & 0X1F);
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}
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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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class Print;
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//------------------------------------------------------------------------------
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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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/** Create an instance. */
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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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//----------------------------------------------------------------------------
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// helpers for stream classes
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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(fpos_t* pos);
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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(fpos_t* pos);
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//----------------------------------------------------------------------------
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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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/** \return The current cluster number for a file or directory. */
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uint32_t curCluster() const {return curCluster_;}
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/** \return The current position for a file or directory. */
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uint32_t curPosition() const {return curPosition_;}
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/** \return Current working directory */
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static SdBaseFile* cwd() {return cwd_;}
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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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/** Cancel the date/time callback function. */
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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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/** \return The total number of bytes in a file or directory. */
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uint32_t fileSize() const {return fileSize_;}
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/** \return The first cluster number for a file or directory. */
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uint32_t firstCluster() const {return firstCluster_;}
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bool getFilename(char* name);
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/** \return True if this is a directory else false. */
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bool isDir() const {return type_ >= FAT_FILE_TYPE_MIN_DIR;}
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/** \return True if this is a normal file else false. */
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bool isFile() const {return type_ == FAT_FILE_TYPE_NORMAL;}
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/** \return True if this is an open file/directory else false. */
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bool isOpen() const {return type_ != FAT_FILE_TYPE_CLOSED;}
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/** \return True if this is a subdirectory else false. */
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bool isSubDir() const {return type_ == FAT_FILE_TYPE_SUBDIR;}
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/** \return True if this is the root directory. */
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bool isRoot() const {
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return type_ == FAT_FILE_TYPE_ROOT_FIXED || type_ == FAT_FILE_TYPE_ROOT32;
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}
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void ls( Print *p, 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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// alias for backward compactability
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bool makeDir(SdBaseFile* dir, const char* path) {
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return mkdir(dir, path, false);
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}
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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(Print *p, uint16_t fatDate);
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static void printFatTime(Print *p, uint16_t fatTime);
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bool printName(Print *p);
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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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/** Set the file's current position to zero. */
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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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// for backward compatibility
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bool rmDir() {return rmdir();}
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bool rmRfStar();
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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(int32_t offset) {
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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(int32_t offset = 0) {return seekSet(fileSize_ + offset);}
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bool seekSet(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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/** Type of file. You should use isFile() or isDir() instead of type()
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* 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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/** \return SdVolume that contains this file. */
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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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//------------------------------------------------------------------------------
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private:
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// allow SdFat to set cwd_
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friend class SdFat;
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// global pointer to cwd dir
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static SdBaseFile* cwd_;
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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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// should be 0X0F
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static uint8_t const F_OFLAG = (O_ACCMODE | O_APPEND | O_SYNC);
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// sync of directory entry required
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static uint8_t const F_FILE_DIR_DIRTY = 0X80;
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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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/** experimental don't use */
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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( Print *p, 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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// to be deleted
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static void printDirName( Print *p, const dir_t& dir,
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uint8_t width, bool printSlash);
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//------------------------------------------------------------------------------
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// Deprecated functions - suppress cpplint warnings with NOLINT comment
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#if ALLOW_DEPRECATED_FUNCTIONS && !defined(DOXYGEN)
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public:
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/** \deprecated Use:
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* bool contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
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* \param[out] bgnBlock the first block address for the file.
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* \param[out] endBlock the last block address for the file.
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* \return true for success or false for failure.
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*/
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bool contiguousRange(uint32_t& bgnBlock, uint32_t& endBlock) { // NOLINT
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return contiguousRange(&bgnBlock, &endBlock);
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}
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/** \deprecated Use:
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* bool createContiguous(SdBaseFile* dirFile,
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* const char* path, uint32_t size)
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* \param[in] dirFile The directory where the file will be created.
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* \param[in] path A path with a valid DOS 8.3 file name.
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* \param[in] size The desired file size.
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* \return true for success or false for failure.
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*/
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bool createContiguous(SdBaseFile& dirFile, // NOLINT
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const char* path, uint32_t size) {
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return createContiguous(&dirFile, path, size);
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}
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/** \deprecated Use:
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* static void dateTimeCallback(
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* void (*dateTime)(uint16_t* date, uint16_t* time));
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* \param[in] dateTime The user's call back function.
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*/
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static void dateTimeCallback(
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void (*dateTime)(uint16_t& date, uint16_t& time)) { // NOLINT
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oldDateTime_ = dateTime;
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dateTime_ = dateTime ? oldToNew : 0;
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}
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/** \deprecated Use: bool dirEntry(dir_t* dir);
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* \param[out] dir Location for return of the file's directory entry.
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* \return true for success or false for failure.
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*/
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bool dirEntry(dir_t& dir) {return dirEntry(&dir);} // NOLINT
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/** \deprecated Use:
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* bool mkdir(SdBaseFile* dir, const char* path);
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* \param[in] dir An open SdFat instance for the directory that will contain
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* the new directory.
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* \param[in] path A path with a valid 8.3 DOS name for the new directory.
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* \return true for success or false for failure.
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*/
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bool mkdir(SdBaseFile& dir, const char* path) { // NOLINT
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return mkdir(&dir, path);
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}
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/** \deprecated Use:
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* bool open(SdBaseFile* dirFile, const char* path, uint8_t oflag);
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* \param[in] dirFile An open SdFat instance for the directory containing the
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* file to be opened.
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* \param[in] path A path with a valid 8.3 DOS name for the file.
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* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
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* OR of flags O_READ, O_WRITE, O_TRUNC, and O_SYNC.
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* \return true for success or false for failure.
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*/
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bool open(SdBaseFile& dirFile, // NOLINT
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const char* path, uint8_t oflag) {
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return open(&dirFile, path, oflag);
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}
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/** \deprecated Do not use in new apps
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* \param[in] dirFile An open SdFat instance for the directory containing the
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* file to be opened.
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* \param[in] path A path with a valid 8.3 DOS name for a file to be opened.
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* \return true for success or false for failure.
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*/
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bool open(SdBaseFile& dirFile, const char* path) { // NOLINT
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return open(dirFile, path, O_RDWR);
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}
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/** \deprecated Use:
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* bool open(SdBaseFile* dirFile, uint16_t index, uint8_t oflag);
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* \param[in] dirFile An open SdFat instance for the directory.
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* \param[in] index The \a index of the directory entry for the file to be
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* opened. The value for \a index is (directory file position)/32.
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* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
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* OR of flags O_READ, O_WRITE, O_TRUNC, and O_SYNC.
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* \return true for success or false for failure.
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|
*/
|
|
bool open(SdBaseFile& dirFile, uint16_t index, uint8_t oflag) { // NOLINT
|
|
return open(&dirFile, index, oflag);
|
|
}
|
|
/** \deprecated Use: bool openRoot(SdVolume* vol);
|
|
* \param[in] vol The FAT volume containing the root directory to be opened.
|
|
* \return true for success or false for failure.
|
|
*/
|
|
bool openRoot(SdVolume& vol) {return openRoot(&vol);} // NOLINT
|
|
/** \deprecated Use: int8_t readDir(dir_t* dir);
|
|
* \param[out] dir The dir_t struct that will receive the data.
|
|
* \return bytes read for success zero for eof or -1 for failure.
|
|
*/
|
|
int8_t readDir(dir_t& dir, char* longFilename) {return readDir(&dir, longFilename);} // NOLINT
|
|
/** \deprecated Use:
|
|
* static uint8_t remove(SdBaseFile* dirFile, const char* path);
|
|
* \param[in] dirFile The directory that contains the file.
|
|
* \param[in] path The name of the file to be removed.
|
|
* \return true for success or false for failure.
|
|
*/
|
|
static bool remove(SdBaseFile& dirFile, const char* path) { // NOLINT
|
|
return remove(&dirFile, path);
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
// rest are private
|
|
private:
|
|
static void (*oldDateTime_)(uint16_t& date, uint16_t& time); // NOLINT
|
|
static void oldToNew(uint16_t* date, uint16_t* time) {
|
|
uint16_t d;
|
|
uint16_t t;
|
|
oldDateTime_(d, t);
|
|
*date = d;
|
|
*time = t;
|
|
}
|
|
#endif // ALLOW_DEPRECATED_FUNCTIONS
|
|
};
|
|
|
|
#endif // SdBaseFile_h
|