probably just variable type issue - number less than zero

[mnmnm]

Opened input file for reading: ../firefly-rk3288_sdk_git.tar.gz
Opened output file for writing: firefly-rk3288_sdk_git.tar.recovered
Found error at byte -394639277 in input stream
Found good data at byte -395313152 in input stream
Total decompressed output = -334166016 bytes

In [2]: 2**32 -394639277
Out[2]: 3900328019

very good utility for (re)downloading files from chinese baidu.com site.
thanks a lot !!

[mnmnm]

$ diff -ubrNdp gzrecover.c.ori gzrecover.c.new
--- gzrecover.c.ori 2014-09-30 13:44:48.643503244 +0200
+++ gzrecover.c.new 2014-09-30 14:32:23.762568982 +0200
@@ -28,7 +28,7 @@
#include <string.h>
#include <zlib.h>

-#define VERSION "0.8"
+#define VERSION "0.8a"

/* Global contants _/
#define DEFAULT_INBUF_SIZE (1024_1024)
@@ -185,7 +185,7 @@ skip_gzip_header(z_stream _d_stream)
int
main(int argc, char *_argv)
{

• int opt, rc, rc2, ifd, ofd, founderr=0, foundgood=0;
• int64_t opt, rc, rc2, ifd, ofd, founderr=0, foundgood=0;
  ssize_t bytes_read=0, tot_written=0;
  off_t errpos=0, errinc=0, readpos=0;
  char _infile;
  @@ -306,8 +306,8 @@ main(int argc, char *_argv)
  errpos = bytes_read - d_stream.avail_in;

       if (verbose_mode)

•            fprintf(stderr, "Found error at byte %d in input stream\n",
  

•                    (int)(readpos - (bytes_read - errpos)));
  

•            fprintf(stderr, "Found error at byte %ld in input stream\n",
  

•                    (int64_t)(readpos - (bytes_read - errpos)));
  
         if (d_stream.avail_in == 0)
           {
  

  @@ -374,8 +374,8 @@ main(int argc, char **argv)
  errinc = 0;

    if (verbose_mode)
  

•        fprintf(stderr, "Found good data at byte %d in input stream\n",
  

•                (int)(readpos - (bytes_read - d_stream.avail_in)));
  

•        fprintf(stderr, "Found good data at byte %ld in input stream\n",
  

•                (int64_t)(readpos - (bytes_read - d_stream.avail_in)));
  
     if (split_mode)
       {
  

  @@ -433,8 +433,8 @@ main(int argc, char **argv)
  close(ifd);

  if (verbose_mode)

• fprintf(stderr, "Total decompressed output = %d bytes\n",

•        (int)tot_written);
  

• fprintf(stderr, "Total decompressed output = %ld bytes\n",

•        (int64_t)tot_written);
  

  free(inbuf);
  free(outbuf);

[arenn]

Thanks for the patch. I'll try to give it a look in the next couple months as I'm swamped with work at present, but this looks straightforward.