safe destruction, even if redraws might be triggered

[wxWidgets.git] / src / zlib / trees.c

diff --git a/src/zlib/trees.c b/src/zlib/trees.c
index 524c67587045fe893f424b154f74a791e550dfd5..d37dff4951d3f6c9cb2ac5dc6ed0230b970975b3 100644 (file)
--- a/src/zlib/trees.c
+++ b/src/zlib/trees.c
@@ -1,6 +1,6 @@
 /* trees.c -- output deflated data using Huffman coding
 /* trees.c -- output deflated data using Huffman coding

- * Copyright (C) 1995-1998 Jean-loup Gailly
- * For conditions of distribution and use, see copyright notice in zlib.h 
+ * Copyright (C) 1995-2002 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h

  */
 
 /*
  */
 
 /*


@@ -189,10 +189,14 @@ local void gen_trees_header OF((void));
 #ifdef __WXDEBUG__
 local void send_bits      OF((deflate_state *s, int value, int length));
 
 #ifdef __WXDEBUG__
 local void send_bits      OF((deflate_state *s, int value, int length));
 

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void send_bits(deflate_state* s, int value, int length)
+#else

 local void send_bits(s, value, length)
     deflate_state *s;
     int value;  /* value to send */
     int length; /* number of bits */
 local void send_bits(s, value, length)
     deflate_state *s;
     int value;  /* value to send */
     int length; /* number of bits */

+#endif

 {
     Tracevv((stderr," l %2d v %4x ", length, value));
     Assert(length > 0 && length <= 15, "invalid length");
 {
     Tracevv((stderr," l %2d v %4x ", length, value));
     Assert(length > 0 && length <= 15, "invalid length");


@@ -250,6 +254,13 @@ local void tr_static_init()
 
     if (static_init_done) return;
 
 
     if (static_init_done) return;
 

+    /* For some embedded targets, global variables are not initialized: */
+    static_l_desc.static_tree = static_ltree;
+    static_l_desc.extra_bits = extra_lbits;
+    static_d_desc.static_tree = static_dtree;
+    static_d_desc.extra_bits = extra_dbits;
+    static_bl_desc.extra_bits = extra_blbits;
+

     /* Initialize the mapping length (0..255) -> length code (0..28) */
     length = 0;
     for (code = 0; code < LENGTH_CODES-1; code++) {
     /* Initialize the mapping length (0..255) -> length code (0..28) */
     length = 0;
     for (code = 0; code < LENGTH_CODES-1; code++) {


@@ -373,13 +384,15 @@ void gen_trees_header()
 /* ===========================================================================
  * Initialize the tree data structures for a new zlib stream.
  */
 /* ===========================================================================
  * Initialize the tree data structures for a new zlib stream.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+void _tr_init(deflate_state* s)
+#else

 void _tr_init(s)
     deflate_state *s;
 void _tr_init(s)
     deflate_state *s;

+#endif

 {
     tr_static_init();
 
 {
     tr_static_init();
 

-    s->compressed_len = 0L;
-

     s->l_desc.dyn_tree = s->dyn_ltree;
     s->l_desc.stat_desc = &static_l_desc;
 
     s->l_desc.dyn_tree = s->dyn_ltree;
     s->l_desc.stat_desc = &static_l_desc;
 


@@ -393,6 +406,7 @@ void _tr_init(s)
     s->bi_valid = 0;
     s->last_eob_len = 8; /* enough lookahead for inflate */
 #ifdef __WXDEBUG__
     s->bi_valid = 0;
     s->last_eob_len = 8; /* enough lookahead for inflate */
 #ifdef __WXDEBUG__

+    s->compressed_len = 0L;

     s->bits_sent = 0L;
 #endif
 
     s->bits_sent = 0L;
 #endif
 


@@ -403,8 +417,12 @@ void _tr_init(s)
 /* ===========================================================================
  * Initialize a new block.
  */
 /* ===========================================================================
  * Initialize a new block.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void init_block(deflate_state* s)
+#else

 local void init_block(s)
     deflate_state *s;
 local void init_block(s)
     deflate_state *s;

+#endif

 {
     int n; /* iterates over tree elements */
 
 {
     int n; /* iterates over tree elements */
 


@@ -447,10 +465,14 @@ local void init_block(s)
  * when the heap property is re-established (each father smaller than its
  * two sons).
  */
  * when the heap property is re-established (each father smaller than its
  * two sons).
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void pqdownheap(deflate_state* s, ct_data* tree, int k)
+#else

 local void pqdownheap(s, tree, k)
     deflate_state *s;
     ct_data *tree;  /* the tree to restore */
     int k;               /* node to move down */
 local void pqdownheap(s, tree, k)
     deflate_state *s;
     ct_data *tree;  /* the tree to restore */
     int k;               /* node to move down */

+#endif

 {
     int v = s->heap[k];
     int j = k << 1;  /* left son of k */
 {
     int v = s->heap[k];
     int j = k << 1;  /* left son of k */


@@ -482,9 +504,13 @@ local void pqdownheap(s, tree, k)
  *     The length opt_len is updated; static_len is also updated if stree is
  *     not null.
  */
  *     The length opt_len is updated; static_len is also updated if stree is
  *     not null.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void gen_bitlen(deflate_state* s, tree_desc* desc)
+#else

 local void gen_bitlen(s, desc)
     deflate_state *s;
     tree_desc *desc;    /* the tree descriptor */
 local void gen_bitlen(s, desc)
     deflate_state *s;
     tree_desc *desc;    /* the tree descriptor */

+#endif

 {
     ct_data *tree        = desc->dyn_tree;
     int max_code         = desc->max_code;
 {
     ct_data *tree        = desc->dyn_tree;
     int max_code         = desc->max_code;


@@ -569,10 +595,14 @@ local void gen_bitlen(s, desc)
  * OUT assertion: the field code is set for all tree elements of non
  *     zero code length.
  */
  * OUT assertion: the field code is set for all tree elements of non
  *     zero code length.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void gen_codes (ct_data* tree, int max_code, ushf* bl_count)
+#else

 local void gen_codes (tree, max_code, bl_count)
     ct_data *tree;             /* the tree to decorate */
     int max_code;              /* largest code with non zero frequency */
     ushf *bl_count;            /* number of codes at each bit length */
 local void gen_codes (tree, max_code, bl_count)
     ct_data *tree;             /* the tree to decorate */
     int max_code;              /* largest code with non zero frequency */
     ushf *bl_count;            /* number of codes at each bit length */

+#endif

 {
     ush next_code[MAX_BITS+1]; /* next code value for each bit length */
     ush code = 0;              /* running code value */
 {
     ush next_code[MAX_BITS+1]; /* next code value for each bit length */
     ush code = 0;              /* running code value */


@@ -588,7 +618,7 @@ local void gen_codes (tree, max_code, bl_count)
     /* Check that the bit counts in bl_count are consistent. The last code
      * must be all ones.
      */
     /* Check that the bit counts in bl_count are consistent. The last code
      * must be all ones.
      */

-    Assert (code + bl_count[MAX_BITS]-1 == (ush)(1<<MAX_BITS)-(ush)1,
+    Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,

             "inconsistent bit counts");
     Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
 
             "inconsistent bit counts");
     Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
 


@@ -611,9 +641,13 @@ local void gen_codes (tree, max_code, bl_count)
  *     and corresponding code. The length opt_len is updated; static_len is
  *     also updated if stree is not null. The field max_code is set.
  */
  *     and corresponding code. The length opt_len is updated; static_len is
  *     also updated if stree is not null. The field max_code is set.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void build_tree(deflate_state* s, tree_desc* desc)
+#else

 local void build_tree(s, desc)
     deflate_state *s;
     tree_desc *desc; /* the tree descriptor */
 local void build_tree(s, desc)
     deflate_state *s;
     tree_desc *desc; /* the tree descriptor */

+#endif

 {
     ct_data *tree         = desc->dyn_tree;
     const ct_data *stree  = desc->stat_desc->static_tree;
 {
     ct_data *tree         = desc->dyn_tree;
     const ct_data *stree  = desc->stat_desc->static_tree;


@@ -698,10 +732,14 @@ local void build_tree(s, desc)
  * Scan a literal or distance tree to determine the frequencies of the codes
  * in the bit length tree.
  */
  * Scan a literal or distance tree to determine the frequencies of the codes
  * in the bit length tree.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void scan_tree (deflate_state* s, ct_data* tree, int max_code)
+#else

 local void scan_tree (s, tree, max_code)
     deflate_state *s;
     ct_data *tree;   /* the tree to be scanned */
     int max_code;    /* and its largest code of non zero frequency */
 local void scan_tree (s, tree, max_code)
     deflate_state *s;
     ct_data *tree;   /* the tree to be scanned */
     int max_code;    /* and its largest code of non zero frequency */

+#endif

 {
     int n;                     /* iterates over all tree elements */
     int prevlen = -1;          /* last emitted length */
 {
     int n;                     /* iterates over all tree elements */
     int prevlen = -1;          /* last emitted length */


@@ -743,10 +781,14 @@ local void scan_tree (s, tree, max_code)
  * Send a literal or distance tree in compressed form, using the codes in
  * bl_tree.
  */
  * Send a literal or distance tree in compressed form, using the codes in
  * bl_tree.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void send_tree (deflate_state* s, ct_data* tree, int max_code)
+#else

 local void send_tree (s, tree, max_code)
     deflate_state *s;
     ct_data *tree; /* the tree to be scanned */
     int max_code;       /* and its largest code of non zero frequency */
 local void send_tree (s, tree, max_code)
     deflate_state *s;
     ct_data *tree; /* the tree to be scanned */
     int max_code;       /* and its largest code of non zero frequency */

+#endif

 {
     int n;                     /* iterates over all tree elements */
     int prevlen = -1;          /* last emitted length */
 {
     int n;                     /* iterates over all tree elements */
     int prevlen = -1;          /* last emitted length */


@@ -794,8 +836,12 @@ local void send_tree (s, tree, max_code)
  * Construct the Huffman tree for the bit lengths and return the index in
  * bl_order of the last bit length code to send.
  */
  * Construct the Huffman tree for the bit lengths and return the index in
  * bl_order of the last bit length code to send.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local int build_bl_tree( deflate_state* s)
+#else

 local int build_bl_tree(s)
     deflate_state *s;
 local int build_bl_tree(s)
     deflate_state *s;

+#endif

 {
     int max_blindex;  /* index of last bit length code of non zero freq */
 
 {
     int max_blindex;  /* index of last bit length code of non zero freq */
 


@@ -829,9 +875,13 @@ local int build_bl_tree(s)
  * lengths of the bit length codes, the literal tree and the distance tree.
  * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
  */
  * lengths of the bit length codes, the literal tree and the distance tree.
  * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void send_all_trees(deflate_state* s, int lcodes, int dcodes, int blcodes)
+#else

 local void send_all_trees(s, lcodes, dcodes, blcodes)
     deflate_state *s;
     int lcodes, dcodes, blcodes; /* number of codes for each tree */
 local void send_all_trees(s, lcodes, dcodes, blcodes)
     deflate_state *s;
     int lcodes, dcodes, blcodes; /* number of codes for each tree */

+#endif

 {
     int rank;                    /* index in bl_order */
 
 {
     int rank;                    /* index in bl_order */
 


@@ -858,16 +908,21 @@ local void send_all_trees(s, lcodes, dcodes, blcodes)
 /* ===========================================================================
  * Send a stored block
  */
 /* ===========================================================================
  * Send a stored block
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+void _tr_stored_block(deflate_state* s, charf* buf, ulg stored_len, int eof)
+#else

 void _tr_stored_block(s, buf, stored_len, eof)
     deflate_state *s;
     charf *buf;       /* input block */
     ulg stored_len;   /* length of input block */
     int eof;          /* true if this is the last block for a file */
 void _tr_stored_block(s, buf, stored_len, eof)
     deflate_state *s;
     charf *buf;       /* input block */
     ulg stored_len;   /* length of input block */
     int eof;          /* true if this is the last block for a file */

+#endif

 {
     send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */
 {
     send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */

+#ifdef __WXDEBUG__

     s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
     s->compressed_len += (stored_len + 4) << 3;
     s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
     s->compressed_len += (stored_len + 4) << 3;

-
+#endif

     copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
 }
 
     copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
 }
 


@@ -882,12 +937,18 @@ void _tr_stored_block(s, buf, stored_len, eof)
  * To simplify the code, we assume the worst case of last real code encoded
  * on one bit only.
  */
  * To simplify the code, we assume the worst case of last real code encoded
  * on one bit only.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+void _tr_align(deflate_state* s)
+#else

 void _tr_align(s)
     deflate_state *s;
 void _tr_align(s)
     deflate_state *s;

+#endif

 {
     send_bits(s, STATIC_TREES<<1, 3);
     send_code(s, END_BLOCK, static_ltree);
 {
     send_bits(s, STATIC_TREES<<1, 3);
     send_code(s, END_BLOCK, static_ltree);

+#ifdef __WXDEBUG__

     s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
     s->compressed_len += 10L; /* 3 for block type, 7 for EOB */

+#endif

     bi_flush(s);
     /* Of the 10 bits for the empty block, we have already sent
      * (10 - bi_valid) bits. The lookahead for the last real code (before
     bi_flush(s);
     /* Of the 10 bits for the empty block, we have already sent
      * (10 - bi_valid) bits. The lookahead for the last real code (before


@@ -897,7 +958,9 @@ void _tr_align(s)
     if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
         send_bits(s, STATIC_TREES<<1, 3);
         send_code(s, END_BLOCK, static_ltree);
     if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
         send_bits(s, STATIC_TREES<<1, 3);
         send_code(s, END_BLOCK, static_ltree);

+#ifdef __WXDEBUG__

         s->compressed_len += 10L;
         s->compressed_len += 10L;

+#endif

         bi_flush(s);
     }
     s->last_eob_len = 7;
         bi_flush(s);
     }
     s->last_eob_len = 7;


@@ -905,14 +968,17 @@ void _tr_align(s)
 
 /* ===========================================================================
  * Determine the best encoding for the current block: dynamic trees, static
 
 /* ===========================================================================
  * Determine the best encoding for the current block: dynamic trees, static

- * trees or store, and output the encoded block to the zip file. This function
- * returns the total compressed length for the file so far.
+ * trees or store, and output the encoded block to the zip file.

  */
  */

-ulg _tr_flush_block(s, buf, stored_len, eof)
+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+void _tr_flush_block(deflate_state* s, charf* buf, ulg stored_len, int eof)
+#else
+void _tr_flush_block(s, buf, stored_len, eof)

     deflate_state *s;
     charf *buf;       /* input block, or NULL if too old */
     ulg stored_len;   /* length of input block */
     int eof;          /* true if this is the last block for a file */
     deflate_state *s;
     charf *buf;       /* input block, or NULL if too old */
     ulg stored_len;   /* length of input block */
     int eof;          /* true if this is the last block for a file */

+#endif

 {
     ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
     int max_blindex = 0;  /* index of last bit length code of non zero freq */
 {
     ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
     int max_blindex = 0;  /* index of last bit length code of non zero freq */


@@ -955,25 +1021,6 @@ ulg _tr_flush_block(s, buf, stored_len, eof)
        opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
     }
 
        opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
     }
 

-    /* If compression failed and this is the first and last block,
-     * and if the .zip file can be seeked (to rewrite the local header),
-     * the whole file is transformed into a stored file:
-     */
-#ifdef STORED_FILE_OK
-#  ifdef FORCE_STORED_FILE
-    if (eof && s->compressed_len == 0L) { /* force stored file */
-#  else
-    if (stored_len <= opt_lenb && eof && s->compressed_len==0L && seekable()) {
-#  endif
-        /* Since LIT_BUFSIZE <= 2*WSIZE, the input data must be there: */
-        if (buf == (charf*)0) error ("block vanished");
-
-        copy_block(buf, (unsigned)stored_len, 0); /* without header */
-        s->compressed_len = stored_len << 3;
-        s->method = STORED;
-    } else
-#endif /* STORED_FILE_OK */
-

 #ifdef FORCE_STORED
     if (buf != (char*)0) { /* force stored block */
 #else
 #ifdef FORCE_STORED
     if (buf != (char*)0) { /* force stored block */
 #else


@@ -995,35 +1042,46 @@ ulg _tr_flush_block(s, buf, stored_len, eof)
 #endif
         send_bits(s, (STATIC_TREES<<1)+eof, 3);
         compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
 #endif
         send_bits(s, (STATIC_TREES<<1)+eof, 3);
         compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);

+#ifdef __WXDEBUG__

         s->compressed_len += 3 + s->static_len;
         s->compressed_len += 3 + s->static_len;

+#endif

     } else {
         send_bits(s, (DYN_TREES<<1)+eof, 3);
         send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
                        max_blindex+1);
         compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
     } else {
         send_bits(s, (DYN_TREES<<1)+eof, 3);
         send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
                        max_blindex+1);
         compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);

+#ifdef __WXDEBUG__

         s->compressed_len += 3 + s->opt_len;
         s->compressed_len += 3 + s->opt_len;

+#endif

     }
     Assert (s->compressed_len == s->bits_sent, "bad compressed size");
     }
     Assert (s->compressed_len == s->bits_sent, "bad compressed size");

+    /* The above check is made mod 2^32, for files larger than 512 MB
+     * and uLong implemented on 32 bits.
+     */

     init_block(s);
 
     if (eof) {
         bi_windup(s);
     init_block(s);
 
     if (eof) {
         bi_windup(s);

+#ifdef __WXDEBUG__

         s->compressed_len += 7;  /* align on byte boundary */
         s->compressed_len += 7;  /* align on byte boundary */

+#endif

     }
     Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
            s->compressed_len-7*eof));
     }
     Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
            s->compressed_len-7*eof));

-
-    return s->compressed_len >> 3;

 }
 
 /* ===========================================================================
  * Save the match info and tally the frequency counts. Return true if
  * the current block must be flushed.
  */
 }
 
 /* ===========================================================================
  * Save the match info and tally the frequency counts. Return true if
  * the current block must be flushed.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+int _tr_tally (deflate_state* s, unsigned dist, unsigned lc)
+#else

 int _tr_tally (s, dist, lc)
     deflate_state *s;
     unsigned dist;  /* distance of matched string */
     unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
 int _tr_tally (s, dist, lc)
     deflate_state *s;
     unsigned dist;  /* distance of matched string */
     unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */

+#endif

 {
     s->d_buf[s->last_lit] = (ush)dist;
     s->l_buf[s->last_lit++] = (uch)lc;
 {
     s->d_buf[s->last_lit] = (ush)dist;
     s->l_buf[s->last_lit++] = (uch)lc;


@@ -1070,10 +1128,14 @@ int _tr_tally (s, dist, lc)
 /* ===========================================================================
  * Send the block data compressed using the given Huffman trees
  */
 /* ===========================================================================
  * Send the block data compressed using the given Huffman trees
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void compress_block(deflate_state* s, ct_data* ltree, ct_data* dtree)
+#else

 local void compress_block(s, ltree, dtree)
     deflate_state *s;
     ct_data *ltree; /* literal tree */
     ct_data *dtree; /* distance tree */
 local void compress_block(s, ltree, dtree)
     deflate_state *s;
     ct_data *ltree; /* literal tree */
     ct_data *dtree; /* distance tree */

+#endif

 {
     unsigned dist;      /* distance of matched string */
     int lc;             /* match length or unmatched char (if dist == 0) */
 {
     unsigned dist;      /* distance of matched string */
     int lc;             /* match length or unmatched char (if dist == 0) */


@@ -1109,7 +1171,7 @@ local void compress_block(s, ltree, dtree)
         } /* literal or match pair ? */
 
         /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
         } /* literal or match pair ? */
 
         /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */

-        Assert((unsigned)s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
+        Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");

 
     } while (lx < s->last_lit);
 
 
     } while (lx < s->last_lit);
 


@@ -1123,8 +1185,12 @@ local void compress_block(s, ltree, dtree)
  * IN assertion: the fields freq of dyn_ltree are set and the total of all
  * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
  */
  * IN assertion: the fields freq of dyn_ltree are set and the total of all
  * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void set_data_type(deflate_state* s)
+#else

 local void set_data_type(s)
     deflate_state *s;
 local void set_data_type(s)
     deflate_state *s;

+#endif

 {
     int n = 0;
     unsigned ascii_freq = 0;
 {
     int n = 0;
     unsigned ascii_freq = 0;


@@ -1140,9 +1206,13 @@ local void set_data_type(s)
  * method would use a table)
  * IN assertion: 1 <= len <= 15
  */
  * method would use a table)
  * IN assertion: 1 <= len <= 15
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local unsigned bi_reverse(unsigned code, int len)
+#else

 local unsigned bi_reverse(code, len)
     unsigned code; /* the value to invert */
     int len;       /* its bit length */
 local unsigned bi_reverse(code, len)
     unsigned code; /* the value to invert */
     int len;       /* its bit length */

+#endif

 {
     register unsigned res = 0;
     do {
 {
     register unsigned res = 0;
     do {


@@ -1155,8 +1225,12 @@ local unsigned bi_reverse(code, len)
 /* ===========================================================================
  * Flush the bit buffer, keeping at most 7 bits in it.
  */
 /* ===========================================================================
  * Flush the bit buffer, keeping at most 7 bits in it.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void bi_flush(deflate_state* s)
+#else

 local void bi_flush(s)
     deflate_state *s;
 local void bi_flush(s)
     deflate_state *s;

+#endif

 {
     if (s->bi_valid == 16) {
         put_short(s, s->bi_buf);
 {
     if (s->bi_valid == 16) {
         put_short(s, s->bi_buf);


@@ -1172,8 +1246,12 @@ local void bi_flush(s)
 /* ===========================================================================
  * Flush the bit buffer and align the output on a byte boundary
  */
 /* ===========================================================================
  * Flush the bit buffer and align the output on a byte boundary
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void bi_windup(deflate_state* s)
+#else

 local void bi_windup(s)
     deflate_state *s;
 local void bi_windup(s)
     deflate_state *s;

+#endif

 {
     if (s->bi_valid > 8) {
         put_short(s, s->bi_buf);
 {
     if (s->bi_valid > 8) {
         put_short(s, s->bi_buf);


@@ -1191,17 +1269,21 @@ local void bi_windup(s)
  * Copy a stored block, storing first the length and its
  * one's complement if requested.
  */
  * Copy a stored block, storing first the length and its
  * one's complement if requested.
  */

+#if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
+local void copy_block(deflate_state* s, charf* buf, unsigned len, int header)
+#else

 local void copy_block(s, buf, len, header)
     deflate_state *s;
     charf    *buf;    /* the input data */
     unsigned len;     /* its length */
     int      header;  /* true if block header must be written */
 local void copy_block(s, buf, len, header)
     deflate_state *s;
     charf    *buf;    /* the input data */
     unsigned len;     /* its length */
     int      header;  /* true if block header must be written */

+#endif

 {
     bi_windup(s);        /* align on byte boundary */
     s->last_eob_len = 8; /* enough lookahead for inflate */
 
     if (header) {
 {
     bi_windup(s);        /* align on byte boundary */
     s->last_eob_len = 8; /* enough lookahead for inflate */
 
     if (header) {

-        put_short(s, (ush)len);   
+        put_short(s, (ush)len);

         put_short(s, (ush)~len);
 #ifdef __WXDEBUG__
         s->bits_sent += 2*16;
         put_short(s, (ush)~len);
 #ifdef __WXDEBUG__
         s->bits_sent += 2*16;