mirror of https://github.com/jscrane/r65emu.git
96 lines
1.5 KiB
C++
96 lines
1.5 KiB
C++
#if defined(USE_SD)
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#include <stdint.h>
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#include <SD.h>
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#include "hardware.h"
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#include "serialio.h"
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#include "filer.h"
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#include "sd_filer.h"
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static File file, dir;
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bool sd_filer::seek(uint32_t pos)
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{
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return file.seek(pos);
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}
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bool sd_filer::start()
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{
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dir = SD.open(_programs);
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return (bool)dir;
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}
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void sd_filer::stop()
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{
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file.close();
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}
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bool sd_filer::more()
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{
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return file.available() > 0;
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}
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uint8_t sd_filer::read() {
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return file.read();
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}
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void sd_filer::write(uint8_t b) {
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file.write(b);
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file.flush();
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}
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const char *sd_filer::advance() {
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bool rewound = false;
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file.close();
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while (true) {
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file = dir.openNextFile();
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if (file) {
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if (file.isDirectory())
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file.close();
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else
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break;
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} else if (!rewound) {
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dir.rewindDirectory();
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rewound = true;
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} else
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return 0;
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}
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return file.name();
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}
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const char *sd_filer::rewind() {
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dir.rewindDirectory();
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}
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#if !defined(NO_CHECKPOINT)
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static char buf[32];
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static char chkpt[] = { "CHKPOINT" };
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static int cpid = 0;
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const char *sd_filer::checkpoint() {
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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 = SD.open(buf, FILE_WRITE);
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hardware_checkpoint(file);
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file.close();
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start();
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return buf;
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}
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void sd_filer::restore(const char *filename) {
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stop();
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snprintf(buf, sizeof(buf), "%s%s", _programs, filename);
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File file = SD.open(buf, FILE_READ);
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hardware_restore(file);
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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;
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start();
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}
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#endif
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#endif
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