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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "Input.h"
#include "Output.h"
#include "generic.h"
#include "Main.h"
#define THRESHOLD 2000
CODE_BEGINS
virtual int startup() throw(GeneralException) {
int n, * index, * sizes, i, d;
String temp;
Handle * h, * o;
verbosity = M_INFO;
if (argc != 2) {
printm(M_BARE, "Usage: unarc <archive>\n");
exit(-1);
}
h = new Input(argv[1]);
h->read(&n, 4);
printm(M_STATUS, "Archive claims to have %i files, checking integrity.\n", n);
if (n > THRESHOLD) {
printm(M_ERROR, "Archive has more than %i files, that doesn't make sense to me.\n", THRESHOLD);
exit(-1);
}
index = (int *) malloc(n * sizeof(int));
sizes = (int *) malloc(n * sizeof(int));
for (i = 0; i < n; i++) {
h->seek((i + 1) * 8 + 4, SEEK_SET);
h->read(&(sizes[i]), 4);
printm(M_INFO, "File #%i size = %i = 0x%08x\n", i, sizes[i], sizes[i]);
}
index[0] = (n + 1) * 8;
i = 0;
printm(M_INFO, "Index #%i = %i = 0x%08x\n", i, index[i], index[i]);
for (i = 1; i < n; i++) {
index[i] = index[i - 1] + sizes[i - 1];
printm(M_INFO, "Index #%i = %i = 0x%08x\n", i, index[i], index[i]);
}
d = h->GetSize() - index[n - 1] - sizes[n - 1];
printm(M_INFO, "Archive size: %i, last index: %i, last file size: %i, difference = %i\n", h->GetSize(), index[n - 1], sizes[n - 1], d);
if ((d < 0) || (d > 2048)) {
printm(M_ERROR, "Archive incoherent.\n");
exit(-1);
}
printm(M_STATUS, "Archive seems to be ok, extracting.\n");
for (i = 0; i < n; i++) {
temp.set("%04i.out", i);
o = new Output(temp);
printm(M_INFO, "Extracting " + temp + "\n");
h->seek(index[i], SEEK_SET);
copy(h, o, sizes[i]);
delete o;
}
delete h;
return 0;
}
CODE_ENDS
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