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r65emu/sdtape.cpp

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#include "hardware.h"
#if defined(SD_CS)
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#include <SD.h>
#define DISK SD
#elif defined(USE_SPIFFS)
#include <SPIFFS.h>
#define DISK SPIFFS
#endif
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#include "sdtape.h"
static File file, dir;
void sdtape::start(const char *programs)
{
dir = DISK.open(programs);
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_pos = _len = 0;
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}
void sdtape::stop()
{
file.close();
}
bool sdtape::more()
{
if (_pos >= _len) {
_pos = 0;
_len = file.read(_buf, sizeof(_buf));
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if (_len == 0) // eof
return false;
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}
return true;
}
const char *sdtape::advance() {
bool rewound = false;
file.close();
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();
}
const char *sdtape::rewind() {
dir.rewindDirectory();
return advance();
}