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43 lines
726 B
C
43 lines
726 B
C
/*
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*
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* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
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*
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*/
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "device.h"
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#define SECTOR_SIZE (2048)
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#define ISO_BLOCKS(X) (((X) / SECTOR_SIZE) + (((X)%SECTOR_SIZE)?1:0))
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static const char *filename = "/dev/cdrom";
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int device_read_sector(void *data,off_t offset, void* buffer, size_t size)
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{
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FILE* file = (FILE*)data;
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lseek(fileno(file), offset << 11, SEEK_SET);
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return read(fileno(file), buffer, ISO_BLOCKS(size) << 11);
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}
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void device_close(void *data)
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{
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FILE* file = (FILE*)data;
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if (file)
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fclose(file);
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}
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FILE *device_open(void)
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{
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FILE* file;
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file = fopen(filename, "rb");
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if (file == NULL)
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return NULL;
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return file;
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}
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