Add 'neozip/' from commit 'c2712b8a345191f6ed79558c089777df94590087'

git-subtree-dir: neozip
git-subtree-mainline: b1e34e861b5d732afe828d58aad2c638135061fd
git-subtree-split: c2712b8a345191f6ed79558c089777df94590087

1 files changed, 45 insertions, 0 deletions

diff --git a/neozip/deflate_huff.c b/neozip/deflate_huff.c
new file mode 100644
index 0000000000..d5a234b114
--- /dev/null
+++ b/neozip/deflate_huff.c
@@ -0,0 +1,45 @@
+/* deflate_huff.c -- compress data using huffman encoding only strategy
+ *
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zbuild.h"
+#include "deflate.h"
+#include "deflate_p.h"
+#include "functable.h"
+
+/* ===========================================================================
+ * For Z_HUFFMAN_ONLY, do not look for matches.  Do not maintain a hash table.
+ * (It will be regenerated if this run of deflate switches away from Huffman.)
+ */
+Z_INTERNAL block_state deflate_huff(deflate_state *s, int flush) {
+    int bflush = 0;         /* set if current block must be flushed */
+
+    for (;;) {
+        /* Make sure that we have a literal to write. */
+        if (s->lookahead == 0) {
+            PREFIX(fill_window)(s);
+            if (s->lookahead == 0) {
+                if (flush == Z_NO_FLUSH)
+                    return need_more;
+                break;      /* flush the current block */
+            }
+        }
+
+        /* Output a literal byte */
+        bflush = zng_tr_tally_lit(s, s->window[s->strstart]);
+        s->lookahead--;
+        s->strstart++;
+        if (bflush)
+            FLUSH_BLOCK(s, 0);
+    }
+    s->insert = 0;
+    if (flush == Z_FINISH) {
+        FLUSH_BLOCK(s, 1);
+        return finish_done;
+    }
+    if (s->sym_next)
+        FLUSH_BLOCK(s, 0);
+    return block_done;
+}