mirror of https://github.com/vivier/EMILE.git
66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/*
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*
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* (c) 2005 Laurent Vivier <Laurent@Vivier.EU>
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*
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*/
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#define _LARGEFILE64_SOURCE
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include "device.h"
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int device_sector_size = 2048;
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#define BLOCKS(X) (((X)/device_sector_size)+(((X)%device_sector_size)?1:0))
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int device_get_blocksize(void *data)
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{
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return device_sector_size;
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}
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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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int fd = (long)data;
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int ret;
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lseek64(fd, (unsigned long long)offset * device_sector_size, SEEK_SET);
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ret = read(fd, buffer, BLOCKS(size) * device_sector_size);
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if (ret != BLOCKS(size) * device_sector_size)
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return -1;
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return 0;
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}
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int device_write_sector(void *data,off_t offset, void* buffer, size_t size)
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{
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int fd = (long)data;
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int ret;
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lseek64(fd, (unsigned long long)offset * device_sector_size, SEEK_SET);
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ret = write(fd, buffer, BLOCKS(size) * device_sector_size);
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if (ret != BLOCKS(size) * device_sector_size)
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return -1;
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return 0;
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}
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void device_close(void *data)
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{
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close((long)data);
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}
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long device_open(char *device, int flags)
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{
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int fd;
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if (device == NULL)
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return -1;
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fd = open(device, flags);
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return fd;
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}
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