1 files changed, 10 insertions, 21 deletions

diff --git a/libpng/infcodes.c b/libpng/infcodes.c
index d4e5ee9..a6e6f9f 100644
--- a/libpng/infcodes.c
+++ b/libpng/infcodes.c
@@ -1,5 +1,5 @@
 /* infcodes.c -- process literals and length/distance pairs
- * Copyright (C) 1995-1998 Mark Adler
+ * Copyright (C) 1995-2002 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -56,11 +56,11 @@ struct inflate_codes_state {
 };
 
 
-inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
-uInt bl, bd;
-inflate_huft *tl;
-inflate_huft *td; /* need separate declaration for Borland C++ */
-z_streamp z;
+inflate_codes_statef *inflate_codes_new(uInt bl, uInt bd, inflate_huft *tl, inflate_huft *td, z_streamp z)
+            
+                 
+                  /* need separate declaration for Borland C++ */
+            
 {
   inflate_codes_statef *c;
 
@@ -78,10 +78,7 @@ z_streamp z;
 }
 
 
-int inflate_codes(s, z, r)
-inflate_blocks_statef *s;
-z_streamp z;
-int r;
+int inflate_codes(inflate_blocks_statef *s, z_streamp z, int r)
 {
   uInt j;               /* temporary storage */
   inflate_huft *t;      /* temporary pointer */
@@ -196,15 +193,9 @@ int r;
       Tracevv((stderr, "inflate:         distance %u\n", c->sub.copy.dist));
       c->mode = COPY;
     case COPY:          /* o: copying bytes in window, waiting for space */
-#ifndef __TURBOC__ /* Turbo C bug for following expression */
-      f = (uInt)(q - s->window) < c->sub.copy.dist ?
-          s->end - (c->sub.copy.dist - (q - s->window)) :
-          q - c->sub.copy.dist;
-#else
       f = q - c->sub.copy.dist;
-      if ((uInt)(q - s->window) < c->sub.copy.dist)
-        f = s->end - (c->sub.copy.dist - (uInt)(q - s->window));
-#endif
+      while (f < s->window)             /* modulo window size-"while" instead */
+        f += s->end - s->window;        /* of "if" handles invalid distances */
       while (c->len)
       {
         NEEDOUT
@@ -248,9 +239,7 @@ int r;
 }
 
 
-void inflate_codes_free(c, z)
-inflate_codes_statef *c;
-z_streamp z;
+void inflate_codes_free(inflate_codes_statef *c, z_streamp z)
 {
   ZFREE(z, c);
   Tracev((stderr, "inflate:       codes free\n"));