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Add time to filesystem API (#6544)

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* Add time to filesystem API

Support the ESP32 File::getLastWrite() call and setting the time on
all filesystems automatically (assuming the system clock has
been set properly and time(NULL) returns the proper time!).

Adds Dir::fileTime() to get the time of a file being listed, similar to
Dir::fileName() and Dir::fileSize().

Adds ::setTimeCallback(time_t (*cb)()) to File, Dir, and FS, allowing
users to override the default timestamp on a per-file, directory, or
filesystem basis. By default, a simple callback returning time(nullptr)
is implemented.

LittleFS uses the 't' attribute and should be backwards compatible.

SD/SDFS work and include wrappers for obsolete SdFat timestamp callbacks
using the MSDOS time.

This PR does not update SPIFFS, due to compatability concerns and a
possible massive rewrite which would make it possible to determine if an
old-style ot metadata enabled FS is present at mount time.

Includes an updated SD/listfiles and LittleFS_time example.

Replaces #6315

* Add links to new mklittlefs w/timestamp support

Include the update mklittlefs which generated 't' metadata on imported
files.
	../tools/sdk/lwip2/include/netif/lowpan6_opts.h

* Add explicit note about timestamp being local time

* Address review concerns

Clean up some awkward object instantiations.

Remove the _enableTime flag/setter from SPIFFS.

Clean up the FSConfig constructors using C++ style init lists.
This commit is contained in:
Earle F. Philhower, III
2019-10-31 06:09:52 -07:00
committed by david gauchard
parent b4c28e74d6
commit 72dd589599
12 changed files with 576 additions and 114 deletions
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50
libraries/SD/src/SD.h
View File

@ -29,6 +29,7 @@
#undef FILE_WRITE
#define FILE_WRITE (sdfat::O_READ | sdfat::O_WRITE | sdfat::O_CREAT | sdfat::O_APPEND)
class SDClass {
public:
boolean begin(uint8_t csPin, SPISettings cfg = SPI_HALF_SPEED) {
@ -137,6 +138,17 @@ public:
return ((uint64_t)clusterSize() * (uint64_t)totalClusters());
}
void setTimeCallback(time_t (*cb)(void)) {
SDFS.setTimeCallback(cb);
}
// Wrapper to allow obsolete datetimecallback use, silently convert to time_t in wrappertimecb
void dateTimeCallback(void (*cb)(uint16_t*, uint16_t*)) {
extern void (*__SD__userDateTimeCB)(uint16_t*, uint16_t*);
__SD__userDateTimeCB = cb;
SDFS.setTimeCallback(wrapperTimeCB);
}
private:
const char *getMode(uint8_t mode) {
bool read = (mode & sdfat::O_READ) ? true : false;
@ -150,8 +162,46 @@ private:
else { return "r"; }
}
static time_t wrapperTimeCB(void) {
extern void (*__SD__userDateTimeCB)(uint16_t*, uint16_t*);
if (__SD__userDateTimeCB) {
uint16_t d, t;
__SD__userDateTimeCB(&d, &t);
return sdfs::SDFSImpl::FatToTimeT(d, t);
}
return time(nullptr);
}
};
// Expose FatStructs.h helpers for MSDOS date/time for use with dateTimeCallback
static inline uint16_t FAT_DATE(uint16_t year, uint8_t month, uint8_t day) {
return (year - 1980) << 9 | month << 5 | day;
}
static inline uint16_t FAT_YEAR(uint16_t fatDate) {
return 1980 + (fatDate >> 9);
}
static inline uint8_t FAT_MONTH(uint16_t fatDate) {
return (fatDate >> 5) & 0XF;
}
static inline uint8_t FAT_DAY(uint16_t fatDate) {
return fatDate & 0X1F;
}
static inline uint16_t FAT_TIME(uint8_t hour, uint8_t minute, uint8_t second) {
return hour << 11 | minute << 5 | second >> 1;
}
static inline uint8_t FAT_HOUR(uint16_t fatTime) {
return fatTime >> 11;
}
static inline uint8_t FAT_MINUTE(uint16_t fatTime) {
return (fatTime >> 5) & 0X3F;
}
static inline uint8_t FAT_SECOND(uint16_t fatTime) {
return 2*(fatTime & 0X1F);
}
#if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SD)
extern SDClass SD;
#endif