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r65emu/flash_filer.cpp

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#include <stdint.h>
#include "hardware.h"
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#if defined(USE_SD)
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#include <SD.h>
#define DISK SD
#elif defined(USE_SPIFFS)
#include <SPIFFS.h>
#define DISK SPIFFS
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#elif defined(USE_FS)
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#include <FS.h>
#endif
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#include "serialio.h"
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#include "filer.h"
#include "flash_filer.h"
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#if defined(DISK)
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static File file, dir;
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#elif defined(USE_FS)
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static File file;
static Dir dir;
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#endif
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bool flash_filer::seek(uint32_t pos)
{
#if defined(USE_SD) || defined(USE_SPIFFS) || defined(USE_FS)
_pos = _len = 0;
return file.seek(pos);
#endif
return false;
}
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bool flash_filer::start()
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{
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#if defined(USE_FS)
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dir = SPIFFS.openDir(_programs);
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#elif defined(DISK)
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dir = DISK.open(_programs);
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if (!dir)
return false;
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#endif
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_pos = _len = 0;
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return true;
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}
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void flash_filer::stop()
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{
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#if defined(USE_SD) || defined(USE_SPIFFS) || defined(USE_FS)
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file.close();
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#endif
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}
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bool flash_filer::more()
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{
if (_pos >= _len) {
_pos = 0;
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#if defined(USE_SD) || defined(USE_SPIFFS) || defined(USE_FS)
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_len = file.read(_buf, sizeof(_buf));
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#endif
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if (_len == 0) // eof
return false;
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}
return true;
}
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const char *flash_filer::advance() {
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#if defined(USE_SD) || defined(USE_SPIFFS) || defined(USE_FS)
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bool rewound = false;
file.close();
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#if defined(USE_FS)
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static char buf[32];
while (true) {
if (dir.next()) {
file = dir.openFile("r");
break;
}
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dir = SPIFFS.openDir(_programs);
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}
strncpy(buf, dir.fileName().c_str(), sizeof(buf));
return buf;
#else
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while (true) {
file = dir.openNextFile();
if (file) {
if (file.isDirectory())
file.close();
else
break;
} else if (!rewound) {
dir.rewindDirectory();
rewound = true;
} else
return 0;
}
return file.name();
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#endif
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#else
return 0;
#endif
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}
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const char *flash_filer::rewind() {
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#if defined(DISK)
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dir.rewindDirectory();
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#endif
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return advance();
}
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#if !defined(NO_CHECKPOINT)
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static char buf[32];
static char chkpt[] = { "CHKPOINT" };
static int cpid = 0;
const char *flash_filer::checkpoint() {
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#if defined(DISK)
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stop();
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snprintf(buf, sizeof(buf), "%s%s.%03d", _programs, chkpt, cpid++);
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File file = DISK.open(buf, FILE_WRITE);
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hardware_checkpoint(file);
file.close();
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start();
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#endif
return buf;
}
void flash_filer::restore(const char *filename) {
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#if defined(DISK)
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stop();
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snprintf(buf, sizeof(buf), "%s%s", _programs, filename);
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File file = DISK.open(buf, FILE_READ);
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hardware_restore(file);
file.close();
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int n = sscanf(buf + strlen(_programs), "%[A-Z0-9].%d", chkpt, &cpid);
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cpid = (n == 1)? 0: cpid+1;
#endif
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start();
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}
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#endif