X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=inflate.c;h=75353e2d72b50f0fb48d51a5ef6498d324dbf901;hb=2c279ee6f6b4ec0d34dc5b8573959a5322248bb4;hp=9f3a6616e18e1ca70eaa0c1b88bde43a0209211c;hpb=e7921f54c622e3b32e525f345bc34308821e4ae0;p=debian%2Fgzip

diff --git a/inflate.c b/inflate.c
index 9f3a661..75353e2 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1,11 +1,11 @@
 /* Inflate deflated data
 
-   Copyright (C) 1997, 1998, 1999, 2002, 2006 Free Software
-   Foundation, Inc.
+   Copyright (C) 1997-1999, 2002, 2006, 2009-2010 Free Software Foundation,
+   Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
+   the Free Software Foundation; either version 3, or (at your option)
    any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -115,16 +115,10 @@
       the two sets of lengths.
  */
 
-#ifdef RCSID
-static char rcsid[] = "$Id: inflate.c,v 1.6 2006/12/20 23:30:17 eggert Exp $";
-#endif
-
 #include <config.h>
 #include "tailor.h"
 
-#if defined STDC_HEADERS || defined HAVE_STDLIB_H
-#  include <stdlib.h>
-#endif
+#include <stdlib.h>
 
 #include "gzip.h"
 #define slide window
@@ -335,13 +329,15 @@ int *m;                 /* maximum lookup bits, returns actual */
   } while (--i);
   if (c[0] == n)                /* null input--all zero length codes */
   {
-    q = (struct huft *) malloc (2 * sizeof *q);
+    q = (struct huft *) malloc (3 * sizeof *q);
     if (!q)
       return 3;
-    hufts += 2;
+    hufts += 3;
     q[0].v.t = (struct huft *) NULL;
     q[1].e = 99;    /* invalid code marker */
     q[1].b = 1;
+    q[2].e = 99;    /* invalid code marker */
+    q[2].b = 1;
     *t = q + 1;
     *m = 1;
     return 0;
@@ -510,7 +506,7 @@ struct huft *t;         /* table to free */
   while (p != (struct huft *)NULL)
   {
     q = (--p)->v.t;
-    free((char*)p);
+    free(p);
     p = q;
   }
   return 0;
@@ -593,7 +589,8 @@ int bl, bd;             /* number of bits decoded by tl[] and td[] */
       do {
         n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
 #if !defined(NOMEMCPY) && !defined(DEBUG)
-        if (w - d >= e)         /* (this test assumes unsigned comparison) */
+        unsigned int delta = w > d ? w - d : d - w;
+        if (delta >= e)
         {
           memcpy(slide + w, slide + d, e);
           w += e;
@@ -885,15 +882,16 @@ int inflate_dynamic()
   }
 
 
-  /* decompress until an end-of-block code */
-  if (inflate_codes(tl, td, bl, bd))
-    return 1;
+  {
+    /* decompress until an end-of-block code */
+    int err = inflate_codes(tl, td, bl, bd) ? 1 : 0;
 
+    /* free the decoding tables */
+    huft_free(tl);
+    huft_free(td);
 
-  /* free the decoding tables, return */
-  huft_free(tl);
-  huft_free(td);
-  return 0;
+    return err;
+  }
 }