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Add device_write_sector() and device_sector_size, use int fd instead FILE*

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This commit is contained in:
Laurent Vivier 2007-10-09 19:16:11 +00:00
parent 2fe3ca34e7
commit 7ba120c6c5
2 changed files with 35 additions and 17 deletions
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45
tools/device.c
View File

@ -6,38 +6,53 @@
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <stdio.h>
#include <fcntl.h>
#include "device.h"
#define SECTOR_SIZE (2048)
#define ISO_BLOCKS(X) (((X) / SECTOR_SIZE) + (((X)%SECTOR_SIZE)?1:0))
int device_sector_size = 2048;
#define BLOCKS(X) (((X)/device_sector_size)+(((X)%device_sector_size)?1:0))
int device_read_sector(void *data,off_t offset, void* buffer, size_t size)
{
FILE* file = (FILE*)data;
int fd = (int)data;
int ret;
lseek(fileno(file), offset << 11, SEEK_SET);
return read(fileno(file), buffer, ISO_BLOCKS(size) << 11);
lseek(fd, offset << 11, SEEK_SET);
ret = read(fd, buffer, BLOCKS(size) << 11);
if (ret != BLOCKS(size) << 11)
return -1;
return 0;
}
int device_write_sector(void *data,off_t offset, void* buffer, size_t size)
{
int fd = (int)data;
int ret;
lseek(fd, offset << 11, SEEK_SET);
ret = write(fd, buffer, BLOCKS(size) << 11);
if (ret != BLOCKS(size) << 11)
return -1;
return 0;
}
void device_close(void *data)
{
FILE* file = (FILE*)data;
if (file)
fclose(file);
close((int)data);
}
FILE *device_open(char *device)
int device_open(char *device, int flags)
{
FILE* file;
int fd;
if (device == NULL)
return NULL;
return -1;
file = fopen(device, "rb");
if (file == NULL)
return NULL;
fd = open(device, flags);
return file;
return fd;
}

7
tools/device.h
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@ -1,6 +1,6 @@
/*
*
* (c) 2005 Laurent Vivier <Laurent@lvivier.info>
* (c) 2005-2007 Laurent Vivier <Laurent@lvivier.info>
*
*/
@ -10,6 +10,9 @@
#include <libstream.h>
extern FILE *device_open(char *device);
extern int device_sector_size;
extern int device_open(char *device, int flags);
extern void device_close(void *data);
extern int device_write_sector(void *data,off_t offset, void* buffer, size_t size);
extern int device_read_sector(void *data, off_t offset, void* buffer, size_t size);