add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/lib/zlib_deflate/deftree.c
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@@ -76,11 +76,6 @@
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  * probability, to avoid transmitting the lengths for unused bit length codes.
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  */
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-#define Buf_size (8 * 2*sizeof(char))
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-/* Number of bits used within bi_buf. (bi_buf might be implemented on
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- * more than 16 bits on some systems.)
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- */
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-
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 /* ===========================================================================
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  * Local data. These are initialized only once.
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  */
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@@ -147,7 +142,6 @@
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 static void compress_block (deflate_state *s, ct_data *ltree,
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                            ct_data *dtree);
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 static void set_data_type  (deflate_state *s);
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-static void bi_windup      (deflate_state *s);
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 static void bi_flush       (deflate_state *s);
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 static void copy_block     (deflate_state *s, char *buf, unsigned len,
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                            int header);
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@@ -168,54 +162,6 @@
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  * must not have side effects. dist_code[256] and dist_code[257] are never
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  * used.
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  */
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-
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-/* ===========================================================================
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- * Send a value on a given number of bits.
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- * IN assertion: length <= 16 and value fits in length bits.
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- */
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-#ifdef DEBUG_ZLIB
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-static void send_bits      (deflate_state *s, int value, int length);
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-
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-static void send_bits(
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-	deflate_state *s,
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-	int value,  /* value to send */
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-	int length  /* number of bits */
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-)
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-{
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-    Tracevv((stderr," l %2d v %4x ", length, value));
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-    Assert(length > 0 && length <= 15, "invalid length");
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-    s->bits_sent += (ulg)length;
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-
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-    /* If not enough room in bi_buf, use (valid) bits from bi_buf and
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-     * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
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-     * unused bits in value.
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-     */
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-    if (s->bi_valid > (int)Buf_size - length) {
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-        s->bi_buf |= (value << s->bi_valid);
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-        put_short(s, s->bi_buf);
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-        s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
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-        s->bi_valid += length - Buf_size;
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-    } else {
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-        s->bi_buf |= value << s->bi_valid;
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-        s->bi_valid += length;
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-    }
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-}
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-#else /* !DEBUG_ZLIB */
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-
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-#define send_bits(s, value, length) \
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-{ int len = length;\
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-  if (s->bi_valid > (int)Buf_size - len) {\
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-    int val = value;\
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-    s->bi_buf |= (val << s->bi_valid);\
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-    put_short(s, s->bi_buf);\
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-    s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
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-    s->bi_valid += len - Buf_size;\
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-  } else {\
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-    s->bi_buf |= (value) << s->bi_valid;\
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-    s->bi_valid += len;\
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-  }\
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-}
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-#endif /* DEBUG_ZLIB */
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 /* ===========================================================================
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  * Initialize the various 'constant' tables. In a multi-threaded environment,