1 files changed, 13 insertions, 5 deletions

diff --git a/infcodes.c b/infcodes.c
index 489f9d6..fc56547 100644
--- a/infcodes.c
+++ b/infcodes.c
@@ -29,7 +29,7 @@ struct inflate_codes_state {
       LIT,      /* o: got literal, waiting for output space */
       WASH,     /* o: got eob, possibly still output waiting */
       END,      /* x: got eob and all data flushed */
-      BAD}      /* x: got error */
+      BADCODE}  /* x: got error */
     mode;               /* current inflate_codes mode */
 
   /* mode dependent information */
@@ -70,6 +70,7 @@ z_stream *z;
     c->dbits = (Byte)bd;
     c->ltree = tl;
     c->dtree = td;
+    Tracev((stderr, "inflate:       codes new\n"));
   }
   return c;
 }
@@ -107,7 +108,7 @@ int r;
         LOAD
         if (r != Z_OK)
         {
-          c->mode = r == Z_STREAM_END ? WASH : BAD;
+          c->mode = r == Z_STREAM_END ? WASH : BADCODE;
           break;
         }
       }
@@ -124,7 +125,7 @@ int r;
       {
         if (e == -128)          /* invalid code */
         {
-          c->mode = BAD;
+          c->mode = BADCODE;
           z->msg = "invalid literal/length code";
           r = Z_DATA_ERROR;
           LEAVE
@@ -132,6 +133,7 @@ int r;
         e = -e;
         if (e & 64)             /* end of block */
         {
+          Tracevv((stderr, "inflate:         end of block\n"));
           c->mode = WASH;
           break;
         }
@@ -142,6 +144,9 @@ int r;
       if (e & 16)               /* literal */
       {
         c->sub.lit = t->base;
+        Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
+                 "inflate:         literal '%c'\n" :
+                 "inflate:         literal 0x%02x\n", t->base));
         c->mode = LIT;
         break;
       }
@@ -155,6 +160,7 @@ int r;
       DUMPBITS(j)
       c->sub.code.need = c->dbits;
       c->sub.code.tree = c->dtree;
+      Tracevv((stderr, "inflate:         length %u\n", c->len));
       c->mode = DIST;
     case DIST:          /* i: get distance next */
       j = c->sub.code.need;
@@ -165,7 +171,7 @@ int r;
       {
         if (e == -128)
         {
-          c->mode = BAD;
+          c->mode = BADCODE;
           z->msg = "invalid distance code";
           r = Z_DATA_ERROR;
           LEAVE
@@ -182,6 +188,7 @@ int r;
       NEEDBITS(j)
       c->sub.copy.dist += (uInt)b & inflate_mask[j];
       DUMPBITS(j)
+      Tracevv((stderr, "inflate:         distance %u\n", c->sub.copy.dist));
       c->mode = COPY;
     case COPY:          /* o: copying bytes in window, waiting for space */
       f = (uInt)(q - s->window) < c->sub.copy.dist ?
@@ -210,7 +217,7 @@ int r;
     case END:
       r = Z_STREAM_END;
       LEAVE
-    case BAD:           /* x: got error */
+    case BADCODE:       /* x: got error */
       r = Z_DATA_ERROR;
       LEAVE
     default:
@@ -227,4 +234,5 @@ z_stream *z;
   inflate_trees_free(c->dtree, z);
   inflate_trees_free(c->ltree, z);
   ZFREE(z, c);
+  Tracev((stderr, "inflate:       codes free\n"));
 }