#pragma prototyped
/*-----------------------------------------------------------*/
/*--- Block recoverer program for bzip2 ---*/
/*--- bzip2recover.c ---*/
/*-----------------------------------------------------------*/
/*--
This program is bzip2recover, a program to attempt data
salvage from damaged files created by the accompanying
bzip2-0.9.0c program.
Copyright (C) 1996-1998 Julian R Seward. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
3. Altered source versions must be plainly marked as such, and must
not be misrepresented as being the original software.
4. The name of the author may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Julian Seward, Guildford, Surrey, UK.
jseward@acm.org
--*/
/*--
This program is a complete hack and should be rewritten
properly. It isn't very complicated.
--*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
typedef unsigned int UInt32;
typedef int Int32;
typedef unsigned char UChar;
typedef char Char;
typedef unsigned char Bool;
/*---------------------------------------------------*/
/*--- I/O errors ---*/
/*---------------------------------------------------*/
/*---------------------------------------------*/
void readError ( void )
{
"%s: I/O error reading `%s', possible reason follows.\n",
progName, inFileName );
progName );
exit ( 1 );
}
/*---------------------------------------------*/
void writeError ( void )
{
"%s: I/O error reading `%s', possible reason follows.\n",
progName, inFileName );
progName );
exit ( 1 );
}
/*---------------------------------------------*/
{
"%s: malloc failed on request for %d bytes.\n",
progName, n );
progName );
exit ( 1 );
}
/*---------------------------------------------------*/
/*--- Bit stream I/O ---*/
/*---------------------------------------------------*/
typedef
struct {
}
/*---------------------------------------------*/
{
return bs;
}
/*---------------------------------------------*/
{
return bs;
}
/*---------------------------------------------*/
{
bytesOut++;
} else {
};
}
/*---------------------------------------------*/
/*--
Returns 0 or 1, or 2 to indicate EOF.
--*/
{
} else {
return 2;
}
}
}
/*---------------------------------------------*/
{
};
bytesOut++;
}
}
}
/*---------------------------------------------*/
{
Int32 i;
for (i = 7; i >= 0; i--)
}
/*---------------------------------------------*/
{
Int32 i;
for (i = 31; i >= 0; i--)
}
/*---------------------------------------------*/
{
if (n <= 4) return False;
return
}
/*---------------------------------------------------*/
/*--- ---*/
/*---------------------------------------------------*/
{
Char* p;
inFileName[0] = outFileName[0] = 0;
if (argc != 2) {
exit(1);
}
exit(1);
}
bitsRead = 0;
currBlock = 0;
rbCtr = 0;
while (True) {
bitsRead++;
if (b == 2) {
if (currBlock > 0)
} else
currBlock--;
break;
}
&& buffLo == BLOCK_HEADER_LO)
||
&& buffLo == BLOCK_ENDMARK_LO)
) {
if (bitsRead > 49)
if (currBlock > 0 &&
rbCtr++;
}
currBlock++;
}
}
/*-- identified blocks run from 1 to rbCtr inclusive. --*/
if (rbCtr < 1) {
"%s: sorry, I couldn't find any block boundaries.\n",
progName );
exit(1);
};
exit(1);
}
/*-- placate gcc's dataflow analyser --*/
bitsRead = 0;
wrBlock = 0;
while (True) {
if (b == 2) break;
}
bitsRead++;
}
wrBlock++;
} else
outFileName[0] = 0;
progName, outFileName );
exit(1);
}
}
}
return 0;
}
/*-----------------------------------------------------------*/
/*--- end bzip2recover.c ---*/
/*-----------------------------------------------------------*/