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/*
*
* sector map class for DeadDiscReader
* Copyright (C) 2006-2007,2009, Gennady "ShultZ" Kozlov <qpxtool@mail.ru>
* it uses QPxTool SCSI transport library
*
*/
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "sectmap.h"
long fsize(FILE* f){
struct stat st;
fstat(fileno(f), &st);
return st.st_size;
}
smap::smap(char* fn, unsigned int sects) {
sectors=sects;
fname = fn;
blocks=(sectors/map_block_sz) + !!(sectors%map_block_sz);
arr=(map_block*)malloc(sizeof(map_block)*blocks);
fill(BM_WAIT);
mutex = new Mutex();
printf("* map: created for %u sectors\n", sectors);
}
smap::~smap() {
save();
delete mutex;
delete arr;
}
mape smap::get(unsigned int sector) {
if (sector > sectors) return BM_INV;
unsigned int row=sector/map_block_sz;
unsigned int col=sector%map_block_sz;
return arr[row][col];
}
int smap::is_done() {
return (sectors-get_done());
}
int smap::get_wait() {
unsigned int cnt=0;
for (unsigned int i=0; i<sectors; i++) if (!get(i)) cnt++;
return cnt;
}
int smap::get_read() {
unsigned int cnt=0;
for (unsigned int i=0; i<sectors; i++) if (get(i) == BM_READ) cnt++;
return cnt;
}
int smap::get_done() {
unsigned int cnt=0;
for (unsigned int i=0; i<sectors; i++) if (get(i) == BM_DONE) cnt++;
return cnt;
}
int smap::get_fail() {
unsigned int cnt=0;
for (unsigned int i=0; i<sectors; i++) if (get(i) == BM_FAIL) cnt++;
return cnt;
}
int smap::get_tot() { return sectors; }
unsigned int smap::get_next(unsigned int *lba, mape state, int *count) {
unsigned int offs=0;
int cnt=0;
int icount=1;
if (count) icount = *count;
// if (lba+scnt > sectors) scnt = sectors - lba;
// printf("smap::get_next(%x,%d,%d)\n",lba ? *lba : -1,state, count ? *count : -1);
if (lba) offs=*lba;
if (icount<2) {
while ((get(offs) != state) && (offs<sectors)) offs++;
} else {
while ((cnt<icount) && (offs<sectors)) {
if (get(offs+cnt) == state) {
cnt++;
} else {
offs+=cnt;
offs++;
cnt=0;
}
}
}
// printf("capacity: %x, offs: %x\n", sectors, offs);
if (offs >= sectors) {
if (icount > 2) {
// printf("Can't find %d sectors block", icount);
(*count)--;
return get_next(lba, state, count);
} else {
offs = 0xFFFFFFFF;
}
}
if (lba) *lba=offs;
if (count) *count = icount;
return offs;
}
void smap::set(unsigned int sector, mape state, int count) {
// if (sector>sectors) return 1;
// if (sector+count>sectors) return 2;
if(count) {
for (int i=0; i<count; i++) set_one(sector+i, state);
} else {
set_one(sector, state);
}
// return 0;
}
void smap::set_one(unsigned int sector, mape state) {
unsigned int row=sector/map_block_sz;
unsigned int col=sector%map_block_sz;
if (sector > sectors) return;
arr[row][col]=state;
}
void smap::fill(mape state){
for (unsigned int i=0; i<blocks; i++)
for (unsigned int j=0; j<map_block_sz; j++) arr[i][j]=state;
}
void smap::set_file(char* fn) { fname = fn; }
int smap::load() {
FILE* f;
int s;
map_block tarr;
printf("loading map : '%s'... ", fname);
if (!(f = fopen(fname,"r"))){
printf("can't open map file!\n");
return 1;
}
s=fsize(f);
fseek(f, 0, SEEK_SET);
for (unsigned i=0; (i<blocks) && (!feof(f)); i++) {
if (fread((void*)&tarr, map_block_sz, sizeof(mape), f) < sizeof(mape)) {
printf("error reading map file!\n");
return 1;
}
for (unsigned j=0; (j<map_block_sz) && (i*map_block_sz+j)<(s/sizeof(mape)); j++)
set(i*map_block_sz+j, tarr[j]);
}
fclose(f);
printf("done\n");
return 0;
}
int smap::save() {
FILE* f;
printf("\nsaving map : '%s'...\n", fname);
if (!(f = fopen(fname,"w"))){
printf("can't create map file!\n");
return 1;
}
fseek(f, 0, SEEK_SET);
for (unsigned i=0; i<blocks; i++)
fwrite((void*)arr[i], map_block_sz, sizeof(mape), f);
fclose(f);
printf("\nSector map saved!\n");
return 0;
}
void smap::lock() { mutex->lock(); }
void smap::unlock() { mutex->unlock(); }
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