Clean up type conversions.

9 files changed, 62 insertions, 57 deletions

diff --git a/deflate.c b/deflate.c
index 804189d..f5a0731 100644
--- a/deflate.c
+++ b/deflate.c
@@ -84,7 +84,7 @@ local block_state deflate_huff   OF((deflate_state *s, int flush));
 local void lm_init        OF((deflate_state *s));
 local void putShortMSB    OF((deflate_state *s, uInt b));
 local void flush_pending  OF((z_streamp strm));
-local int read_buf        OF((z_streamp strm, Bytef *buf, unsigned size));
+local unsigned read_buf   OF((z_streamp strm, Bytef *buf, unsigned size));
 #ifdef ASMV
       void match_init OF((void)); /* asm code initialization */
       uInt longest_match  OF((deflate_state *s, IPos cur_match));
@@ -277,11 +277,11 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
 
     s->wrap = wrap;
     s->gzhead = Z_NULL;
-    s->w_bits = windowBits;
+    s->w_bits = (uInt)windowBits;
     s->w_size = 1 << s->w_bits;
     s->w_mask = s->w_size - 1;
 
-    s->hash_bits = memLevel + 7;
+    s->hash_bits = (uInt)memLevel + 7;
     s->hash_size = 1 << s->hash_bits;
     s->hash_mask = s->hash_size - 1;
     s->hash_shift =  ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
@@ -534,10 +534,10 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
 
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
     s = strm->state;
-    s->good_match = good_length;
-    s->max_lazy_match = max_lazy;
+    s->good_match = (uInt)good_length;
+    s->max_lazy_match = (uInt)max_lazy;
     s->nice_match = nice_length;
-    s->max_chain_length = max_chain;
+    s->max_chain_length = (uInt)max_chain;
     return Z_OK;
 }
 
@@ -1068,7 +1068,7 @@ int ZEXPORT deflateCopy (dest, source)
  * allocating a large strm->next_in buffer and copying from it.
  * (See also flush_pending()).
  */
-local int read_buf(strm, buf, size)
+local unsigned read_buf(strm, buf, size)
     z_streamp strm;
     Bytef *buf;
     unsigned size;
@@ -1092,7 +1092,7 @@ local int read_buf(strm, buf, size)
     strm->next_in  += len;
     strm->total_in += len;
 
-    return (int)len;
+    return len;
 }
 
 /* ===========================================================================
@@ -1148,7 +1148,7 @@ local uInt longest_match(s, cur_match)
     register Bytef *scan = s->window + s->strstart; /* current string */
     register Bytef *match;                      /* matched string */
     register int len;                           /* length of current match */
-    int best_len = s->prev_length;              /* best match length so far */
+    int best_len = (int)s->prev_length;         /* best match length so far */
     int nice_match = s->nice_match;             /* stop if match long enough */
     IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
         s->strstart - (IPos)MAX_DIST(s) : NIL;
@@ -1183,7 +1183,7 @@ local uInt longest_match(s, cur_match)
     /* Do not look for matches beyond the end of the input. This is necessary
      * to make deflate deterministic.
      */
-    if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+    if ((uInt)nice_match > s->lookahead) nice_match = (int)s->lookahead;
 
     Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
 
@@ -1589,7 +1589,7 @@ local block_state deflate_stored(s, flush)
         s->lookahead = 0;
 
         /* Emit a stored block if pending_buf will be full: */
-        max_start = s->block_start + max_block_size;
+        max_start = max_block_size + (ulg)s->block_start;
         if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
             /* strstart == 0 is possible when wraparound on 16-bit machine */
             s->lookahead = (uInt)(s->strstart - max_start);
@@ -1887,7 +1887,7 @@ local block_state deflate_rle(s, flush)
                          prev == *++scan && prev == *++scan &&
                          prev == *++scan && prev == *++scan &&
                          scan < strend);
-                s->match_length = MAX_MATCH - (int)(strend - scan);
+                s->match_length = MAX_MATCH - (uInt)(strend - scan);
                 if (s->match_length > s->lookahead)
                     s->match_length = s->lookahead;
             }
diff --git a/deflate.h b/deflate.h
index f18c616..fdc0a12 100644
--- a/deflate.h
+++ b/deflate.h
@@ -275,7 +275,7 @@ typedef struct internal_state {
 /* Output a byte on the stream.
  * IN assertion: there is enough room in pending_buf.
  */
-#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (Bytef)(c);}
 
 
 #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
@@ -328,8 +328,8 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
     flush = (s->last_lit == s->lit_bufsize-1); \
    }
 # define _tr_tally_dist(s, distance, length, flush) \
-  { uch len = (length); \
-    ush dist = (distance); \
+  { uch len = (uch)(length); \
+    ush dist = (ush)(distance); \
     s->d_buf[s->last_lit] = dist; \
     s->l_buf[s->last_lit++] = len; \
     dist--; \
diff --git a/gzread.c b/gzread.c
index bf4538e..d41704a 100644
--- a/gzread.c
+++ b/gzread.c
@@ -23,14 +23,14 @@ local int gz_load(state, buf, len, have)
     unsigned len;
     unsigned *have;
 {
-    int ret;
+    ssize_t ret;
 
     *have = 0;
     do {
         ret = read(state->fd, buf + *have, len - *have);
         if (ret <= 0)
             break;
-        *have += ret;
+        *have += (unsigned)ret;
     } while (*have < len);
     if (ret < 0) {
         gz_error(state, Z_ERRNO, zstrerror());
@@ -451,7 +451,7 @@ int ZEXPORT gzungetc(c, file)
     if (state->x.have == 0) {
         state->x.have = 1;
         state->x.next = state->out + (state->size << 1) - 1;
-        state->x.next[0] = c;
+        state->x.next[0] = (unsigned char)c;
         state->x.pos--;
         state->past = 0;
         return c;
@@ -473,7 +473,7 @@ int ZEXPORT gzungetc(c, file)
     }
     state->x.have++;
     state->x.next--;
-    state->x.next[0] = c;
+    state->x.next[0] = (unsigned char)c;
     state->x.pos--;
     state->past = 0;
     return c;
diff --git a/gzwrite.c b/gzwrite.c
index f07731a..1696692 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -72,7 +72,8 @@ local int gz_comp(state, flush)
     gz_statep state;
     int flush;
 {
-    int ret, got;
+    int ret;
+    ssize_t got;
     unsigned have;
     z_streamp strm = &(state->strm);
 
@@ -88,7 +89,7 @@ local int gz_comp(state, flush)
                 gz_error(state, Z_ERRNO, zstrerror());
                 return -1;
             }
-            strm->avail_in -= got;
+            strm->avail_in -= (unsigned)got;
             strm->next_in += got;
         }
         return 0;
@@ -103,7 +104,7 @@ local int gz_comp(state, flush)
             (flush != Z_FINISH || ret == Z_STREAM_END))) {
             while (strm->next_out > state->x.next) {
                 got = write(state->fd, state->x.next,
-                            strm->next_out - state->x.next);
+                            (unsigned long)(strm->next_out - state->x.next));
                 if (got < 0) {
                     gz_error(state, Z_ERRNO, zstrerror());
                     return -1;
@@ -281,7 +282,7 @@ int ZEXPORT gzputc(file, c)
             strm->next_in = state->in;
         have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
         if (have < state->size) {
-            state->in[have] = c;
+            state->in[have] = (unsigned char)c;
             strm->avail_in++;
             state->x.pos++;
             return c & 0xff;
@@ -289,7 +290,7 @@ int ZEXPORT gzputc(file, c)
     }
 
     /* no room in buffer or not initialized, use gz_write() */
-    buf[0] = c;
+    buf[0] = (unsigned char)c;
     if (gzwrite(file, buf, 1) != 1)
         return -1;
     return c & 0xff;
@@ -315,7 +316,8 @@ int ZEXPORT gzputs(file, str)
 /* -- see zlib.h -- */
 int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
 {
-    unsigned len, left;
+    int len;
+    unsigned left;
     char *next;
     gz_statep state;
     z_streamp strm;
@@ -346,7 +348,7 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
        be state->size bytes available after the current contents */
     if (strm->avail_in == 0)
         strm->next_in = state->in;
-    next = (char *)(strm->next_in + strm->avail_in);
+    next = (char *)(state->in + (strm->next_in - state->in) + strm->avail_in);
     next[state->size - 1] = 0;
 #ifdef NO_vsnprintf
 #  ifdef HAS_vsprintf_void
@@ -366,11 +368,11 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
 #endif
 
     /* check that printf() results fit in buffer */
-    if (len == 0 || len >= state->size || next[state->size - 1] != 0)
+    if (len == 0 || (unsigned)len >= state->size || next[state->size - 1] != 0)
         return 0;
 
     /* update buffer and position, compress first half if past that */
-    strm->avail_in += len;
+    strm->avail_in += (unsigned)len;
     state->x.pos += len;
     if (strm->avail_in >= state->size) {
         left = strm->avail_in - state->size;
@@ -381,7 +383,7 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
         strm->next_in = state->in;
         strm->avail_in = left;
     }
-    return (int)len;
+    return len;
 }
 
 int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)
diff --git a/infback.c b/infback.c
index f3833c2..ea3f76a 100644
--- a/infback.c
+++ b/infback.c
@@ -61,7 +61,7 @@ int stream_size;
     Tracev((stderr, "inflate: allocated\n"));
     strm->state = (struct internal_state FAR *)state;
     state->dmax = 32768U;
-    state->wbits = windowBits;
+    state->wbits = (uInt)windowBits;
     state->wsize = 1U << windowBits;
     state->window = window;
     state->wnext = 0;
diff --git a/inflate.c b/inflate.c
index 2f3fcc9..eb1b4ce 100644
--- a/inflate.c
+++ b/inflate.c
@@ -241,10 +241,10 @@ int value;
         state->bits = 0;
         return Z_OK;
     }
-    if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+    if (bits > 16 || state->bits + (uInt)bits > 32) return Z_STREAM_ERROR;
     value &= (1L << bits) - 1;
     state->hold += (unsigned)value << state->bits;
-    state->bits += bits;
+    state->bits += (uInt)bits;
     return Z_OK;
 }
 
@@ -767,7 +767,7 @@ int flush;
                     if (state->head != Z_NULL &&
                             state->head->name != Z_NULL &&
                             state->length < state->head->name_max)
-                        state->head->name[state->length++] = len;
+                        state->head->name[state->length++] = (Bytef)len;
                 } while (len && copy < have);
                 if ((state->flags & 0x0200) && (state->wrap & 4))
                     state->check = crc32(state->check, next, copy);
@@ -788,7 +788,7 @@ int flush;
                     if (state->head != Z_NULL &&
                             state->head->comment != Z_NULL &&
                             state->length < state->head->comm_max)
-                        state->head->comment[state->length++] = len;
+                        state->head->comment[state->length++] = (Bytef)len;
                 } while (len && copy < have);
                 if ((state->flags & 0x0200) && (state->wrap & 4))
                     state->check = crc32(state->check, next, copy);
@@ -1249,7 +1249,7 @@ int flush;
     if ((state->wrap & 4) && out)
         strm->adler = state->check =
             UPDATE(state->check, strm->next_out - out, out);
-    strm->data_type = state->bits + (state->last ? 64 : 0) +
+    strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
                       (state->mode == TYPE ? 128 : 0) +
                       (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
     if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
@@ -1500,6 +1500,7 @@ int subvert;
     state->sane = !subvert;
     return Z_OK;
 #else
+    (void)subvert;
     state->sane = 1;
     return Z_DATA_ERROR;
 #endif
@@ -1537,7 +1538,7 @@ unsigned long ZEXPORT inflateCodesUsed(strm)
 z_streamp strm;
 {
     struct inflate_state FAR *state;
-    if (strm == Z_NULL || strm->state == Z_NULL) return -1L;
+    if (strm == Z_NULL || strm->state == Z_NULL) return (unsigned long)0 - 1;
     state = (struct inflate_state FAR *)strm->state;
-    return state->next - state->codes;
+    return (unsigned long)(state->next - state->codes);
 }
diff --git a/trees.c b/trees.c
index 4453716..b718a7c 100644
--- a/trees.c
+++ b/trees.c
@@ -213,7 +213,7 @@ local void send_bits(s, value, length)
 #define send_bits(s, value, length) \
 { int len = length;\
   if (s->bi_valid > (int)Buf_size - len) {\
-    int val = value;\
+    int val = (int)value;\
     s->bi_buf |= (ush)val << s->bi_valid;\
     put_short(s, s->bi_buf);\
     s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
@@ -522,8 +522,8 @@ local void gen_bitlen(s, desc)
         xbits = 0;
         if (n >= base) xbits = extra[n-base];
         f = tree[n].Freq;
-        s->opt_len += (ulg)f * (bits + xbits);
-        if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+        s->opt_len += (ulg)f * (unsigned)(bits + xbits);
+        if (stree) s->static_len += (ulg)f * (unsigned)(stree[n].Len + xbits);
     }
     if (overflow == 0) return;
 
@@ -555,8 +555,7 @@ local void gen_bitlen(s, desc)
             if (m > max_code) continue;
             if ((unsigned) tree[m].Len != (unsigned) bits) {
                 Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
-                s->opt_len += ((long)bits - (long)tree[m].Len)
-                              *(long)tree[m].Freq;
+                s->opt_len += ((ulg)bits - tree[m].Len) * tree[m].Freq;
                 tree[m].Len = (ush)bits;
             }
             n--;
@@ -578,7 +577,7 @@ local void gen_codes (tree, max_code, bl_count)
     ushf *bl_count;            /* number of codes at each bit length */
 {
     ush next_code[MAX_BITS+1]; /* next code value for each bit length */
-    ush code = 0;              /* running code value */
+    unsigned code = 0;         /* running code value */
     int bits;                  /* bit index */
     int n;                     /* code index */
 
@@ -586,7 +585,8 @@ local void gen_codes (tree, max_code, bl_count)
      * without bit reversal.
      */
     for (bits = 1; bits <= MAX_BITS; bits++) {
-        next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+        code = (code + bl_count[bits-1]) << 1;
+        next_code[bits] = (ush)code;
     }
     /* Check that the bit counts in bl_count are consistent. The last code
      * must be all ones.
@@ -599,7 +599,7 @@ local void gen_codes (tree, max_code, bl_count)
         int len = tree[n].Len;
         if (len == 0) continue;
         /* Now reverse the bits */
-        tree[n].Code = bi_reverse(next_code[len]++, len);
+        tree[n].Code = (ush)bi_reverse(next_code[len]++, len);
 
         Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
              n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
@@ -821,7 +821,7 @@ local int build_bl_tree(s)
         if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
     }
     /* Update opt_len to include the bit length tree and counts */
-    s->opt_len += 3*(max_blindex+1) + 5+5+4;
+    s->opt_len += 3*((ulg)max_blindex+1) + 5+5+4;
     Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
             s->opt_len, s->static_len));
 
@@ -1090,7 +1090,7 @@ local void compress_block(s, ltree, dtree)
             send_code(s, code, dtree);       /* send the distance code */
             extra = extra_dbits[code];
             if (extra != 0) {
-                dist -= base_dist[code];
+                dist -= (unsigned)base_dist[code];
                 send_bits(s, dist, extra);   /* send the extra distance bits */
             }
         } /* literal or match pair ? */
diff --git a/zlib.h b/zlib.h
index 571847e..709d80f 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1765,6 +1765,7 @@ ZEXTERN int            ZEXPORT inflateSyncPoint OF((z_streamp));
 ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table    OF((void));
 ZEXTERN int            ZEXPORT inflateUndermine OF((z_streamp, int));
 ZEXTERN int            ZEXPORT inflateValidate OF((z_streamp, int));
+ZEXTERN unsigned long  ZEXPORT inflateCodesUsed OF ((z_streamp));
 ZEXTERN int            ZEXPORT inflateResetKeep OF((z_streamp));
 ZEXTERN int            ZEXPORT deflateResetKeep OF((z_streamp));
 #if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
diff --git a/zutil.c b/zutil.c
index a6b887e..74e48aa 100644
--- a/zutil.c
+++ b/zutil.c
@@ -11,16 +11,17 @@
 #endif
 
 z_const char * const z_errmsg[10] = {
-"need dictionary",     /* Z_NEED_DICT       2  */
-"stream end",          /* Z_STREAM_END      1  */
-"",                    /* Z_OK              0  */
-"file error",          /* Z_ERRNO         (-1) */
-"stream error",        /* Z_STREAM_ERROR  (-2) */
-"data error",          /* Z_DATA_ERROR    (-3) */
-"insufficient memory", /* Z_MEM_ERROR     (-4) */
-"buffer error",        /* Z_BUF_ERROR     (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
-""};
+    (z_const char *)"need dictionary",     /* Z_NEED_DICT       2  */
+    (z_const char *)"stream end",          /* Z_STREAM_END      1  */
+    (z_const char *)"",                    /* Z_OK              0  */
+    (z_const char *)"file error",          /* Z_ERRNO         (-1) */
+    (z_const char *)"stream error",        /* Z_STREAM_ERROR  (-2) */
+    (z_const char *)"data error",          /* Z_DATA_ERROR    (-3) */
+    (z_const char *)"insufficient memory", /* Z_MEM_ERROR     (-4) */
+    (z_const char *)"buffer error",        /* Z_BUF_ERROR     (-5) */
+    (z_const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
+    (z_const char *)""
+};
 
 
 const char * ZEXPORT zlibVersion()