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export find_sectors_per_cluster_aux()

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This commit is contained in:
Christophe Grenier 2009-02-20 14:03:59 +01:00
parent 2801b7815b
commit 9c85398217
2 changed files with 69 additions and 72 deletions
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123
src/fat_cluster.c
View file

@ -38,89 +38,68 @@
#include "log.h"
#include "fat_cluster.h"
typedef struct sector_cluster_struct sector_cluster_t;
typedef struct cluster_offset_struct cluster_offset_t;
struct sector_cluster_struct
{
unsigned int sector;
unsigned int cluster;
};
struct cluster_offset_struct
{
unsigned int sectors_per_cluster;
unsigned long int offset;
unsigned int nbr;
unsigned int first_sol;
};
static int find_sectors_per_cluster_aux(const sector_cluster_t *sector_cluster, const unsigned int nbr_sector_cluster,unsigned int *sectors_per_cluster, uint64_t *offset, const int verbose, const unsigned long int part_size_in_sectors);
/* Using a couple of inodes of "." directory entries, get the cluster size and where the first cluster begins.
* */
int find_sectors_per_cluster(disk_t *disk_car, partition_t *partition, const int verbose, const int dump_ind,const int interface, unsigned int *sectors_per_cluster, uint64_t *offset_org)
{
unsigned int nbr_subdir=0;
sector_cluster_t sector_cluster[10];
uint64_t offset;
uint64_t skip_offset;
int ind_stop=0;
unsigned char *buffer=(unsigned char *)MALLOC(disk_car->sector_size);
#ifdef HAVE_NCURSES
if(interface)
{
uint64_t offset;
uint64_t skip_offset;
int ind_stop=0;
unsigned char *buffer=(unsigned char *)MALLOC(disk_car->sector_size);
#ifdef HAVE_NCURSES
if(interface)
{
wmove(stdscr,22,0);
wattrset(stdscr, A_REVERSE);
waddstr(stdscr," Stop ");
wattroff(stdscr, A_REVERSE);
}
#endif
/* 2 fats, maximum cluster size=128 */
skip_offset=(uint64_t)((partition->part_size-32*disk_car->sector_size)/disk_car->sector_size/128*1.5/disk_car->sector_size*2)*disk_car->sector_size;
if(verbose>0)
{
log_verbose("find_sectors_per_cluster skip_sectors=%lu (skip_offset=%lu)\n",
(unsigned long)(skip_offset/disk_car->sector_size),
(unsigned long)skip_offset);
}
for(offset=skip_offset;(offset<partition->part_size)&&!ind_stop&&(nbr_subdir<10);offset+=disk_car->sector_size)
{
#ifdef HAVE_NCURSES
if(interface>0 && ((offset&(1024*disk_car->sector_size-1))==0))
{
wmove(stdscr,9,0);
wclrtoeol(stdscr);
wprintw(stdscr,"Search subdirectory %10lu/%lu %u",(unsigned long)(offset/disk_car->sector_size),(unsigned long)(partition->part_size/disk_car->sector_size),nbr_subdir);
wrefresh(stdscr);
ind_stop|=check_enter_key_or_s(stdscr);
}
#endif
if((unsigned)disk_car->pread(disk_car, buffer, disk_car->sector_size, partition->part_offset + offset) == disk_car->sector_size)
{
if(memcmp(&buffer[0],". ",8+3)==0 && memcmp(&buffer[0x20],".. ",8+3)==0)
{
unsigned long int cluster=(buffer[0*0x20+0x15]<<24) + (buffer[0*0x20+0x14]<<16) +
(buffer[0*0x20+0x1B]<<8) + buffer[0*0x20+0x1A];
log_info("sector %lu, cluster %lu\n",
(unsigned long)(offset/disk_car->sector_size), cluster);
sector_cluster[nbr_subdir].cluster=cluster;
sector_cluster[nbr_subdir].sector=offset/disk_car->sector_size;
nbr_subdir++;
#ifdef HAVE_NCURSES
if(dump_ind>0)
dump_ncurses(buffer,disk_car->sector_size);
#endif
}
}
}
free(buffer);
wmove(stdscr,22,0);
wattrset(stdscr, A_REVERSE);
waddstr(stdscr," Stop ");
wattroff(stdscr, A_REVERSE);
}
#endif
/* 2 fats, maximum cluster size=128 */
skip_offset=(uint64_t)((partition->part_size-32*disk_car->sector_size)/disk_car->sector_size/128*1.5/disk_car->sector_size*2)*disk_car->sector_size;
if(verbose>0)
{
log_verbose("find_sectors_per_cluster skip_sectors=%lu (skip_offset=%lu)\n",
(unsigned long)(skip_offset/disk_car->sector_size),
(unsigned long)skip_offset);
}
for(offset=skip_offset;(offset<partition->part_size)&&!ind_stop&&(nbr_subdir<10);offset+=disk_car->sector_size)
{
#ifdef HAVE_NCURSES
if(interface>0 && ((offset&(1024*disk_car->sector_size-1))==0))
{
wmove(stdscr,9,0);
wclrtoeol(stdscr);
wprintw(stdscr,"Search subdirectory %10lu/%lu %u",(unsigned long)(offset/disk_car->sector_size),(unsigned long)(partition->part_size/disk_car->sector_size),nbr_subdir);
wrefresh(stdscr);
ind_stop|=check_enter_key_or_s(stdscr);
}
#endif
if((unsigned)disk_car->pread(disk_car, buffer, disk_car->sector_size, partition->part_offset + offset) == disk_car->sector_size)
{
if(memcmp(&buffer[0],". ",8+3)==0 && memcmp(&buffer[0x20],".. ",8+3)==0)
{
unsigned long int cluster=(buffer[0*0x20+0x15]<<24) + (buffer[0*0x20+0x14]<<16) +
(buffer[0*0x20+0x1B]<<8) + buffer[0*0x20+0x1A];
log_info("sector %lu, cluster %lu\n",
(unsigned long)(offset/disk_car->sector_size), cluster);
sector_cluster[nbr_subdir].cluster=cluster;
sector_cluster[nbr_subdir].sector=offset/disk_car->sector_size;
nbr_subdir++;
#ifdef HAVE_NCURSES
if(dump_ind>0)
dump_ncurses(buffer,disk_car->sector_size);
#endif
}
}
}
free(buffer);
return find_sectors_per_cluster_aux(sector_cluster,nbr_subdir,sectors_per_cluster,offset_org,verbose,partition->part_size/disk_car->sector_size);
}
static int find_sectors_per_cluster_aux(const sector_cluster_t *sector_cluster, const unsigned int nbr_sector_cluster,unsigned int *sectors_per_cluster, uint64_t *offset, const int verbose, const unsigned long int part_size_in_sectors)
int find_sectors_per_cluster_aux(const sector_cluster_t *sector_cluster, const unsigned int nbr_sector_cluster,unsigned int *sectors_per_cluster, uint64_t *offset, const int verbose, const unsigned long int part_size_in_sectors)
{
cluster_offset_t *cluster_offset;
unsigned int i,j;

18
src/fat_cluster.h
View file

@ -25,8 +25,26 @@
extern "C" {
#endif
typedef struct sector_cluster_struct sector_cluster_t;
typedef struct cluster_offset_struct cluster_offset_t;
struct sector_cluster_struct
{
unsigned int sector;
unsigned int cluster;
};
struct cluster_offset_struct
{
unsigned int sectors_per_cluster;
unsigned long int offset;
unsigned int nbr;
unsigned int first_sol;
};
int find_sectors_per_cluster(disk_t *disk_car, partition_t *partition, const int verbose, const int dump_ind,const int interface, unsigned int *sectors_per_cluster, uint64_t *offset);
upart_type_t no_of_cluster2part_type(const unsigned long int no_of_cluster);
int find_sectors_per_cluster_aux(const sector_cluster_t *sector_cluster, const unsigned int nbr_sector_cluster,unsigned int *sectors_per_cluster, uint64_t *offset, const int verbose, const unsigned long int part_size_in_sectors);
#ifdef __cplusplus
} /* closing brace for extern "c" */