[Library] Update zlibng (#1255)

* Update zlibng * Set cmake path more directly in zlibng to hopefully fix an issue with the build on drone * I'm dumb, missing / in path * Mackal helps with a dumb gitignore issue * Adding all the files, not sure what's ignoring them and im tired of looking * Some tweaks to zlibng build to hopefully get it to build properly. works on msvc now
2026-06-23 08:28:21 +00:00 · 2021-02-23 17:00:26 -08:00
parent e6dee96266
commit 2957f5084d
184 changed files with 22029 additions and 11703 deletions
@@ -0,0 +1,121 @@
+/*
+ * The deflate_quick deflate strategy, designed to be used when cycles are
+ * at a premium.
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ * Authors:
+ *  Wajdi Feghali   <wajdi.k.feghali@intel.com>
+ *  Jim Guilford    <james.guilford@intel.com>
+ *  Vinodh Gopal    <vinodh.gopal@intel.com>
+ *     Erdinc Ozturk   <erdinc.ozturk@intel.com>
+ *  Jim Kukunas     <james.t.kukunas@linux.intel.com>
+ *
+ * Portions are Copyright (C) 2016 12Sided Technology, LLC.
+ * Author:
+ *  Phil Vachon     <pvachon@12sidedtech.com>
+ *
+ * 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"
+#include "trees_emit.h"
+
+extern const ct_data static_ltree[L_CODES+2];
+extern const ct_data static_dtree[D_CODES];
+
+#define QUICK_START_BLOCK(s, last) { \
+    zng_tr_emit_tree(s, STATIC_TREES, last); \
+    s->block_open = 1 + (int)last; \
+    s->block_start = (int)s->strstart; \
+}
+
+#define QUICK_END_BLOCK(s, last) { \
+    if (s->block_open) { \
+        zng_tr_emit_end_block(s, static_ltree, last); \
+        s->block_open = 0; \
+        s->block_start = (int)s->strstart; \
+        flush_pending(s->strm); \
+        if (s->strm->avail_out == 0) \
+            return (last) ? finish_started : need_more; \
+    } \
+}
+
+Z_INTERNAL block_state deflate_quick(deflate_state *s, int flush) {
+    Pos hash_head;
+    int64_t dist;
+    unsigned match_len, last;
+
+
+    last = (flush == Z_FINISH) ? 1 : 0;
+    if (UNLIKELY(last && s->block_open != 2)) {
+        /* Emit end of previous block */
+        QUICK_END_BLOCK(s, 0);
+        /* Emit start of last block */
+        QUICK_START_BLOCK(s, last);
+    } else if (UNLIKELY(s->block_open == 0 && s->lookahead > 0)) {
+        /* Start new block only when we have lookahead data, so that if no
+           input data is given an empty block will not be written */
+        QUICK_START_BLOCK(s, last);
+    }
+
+    for (;;) {
+        if (UNLIKELY(s->pending + ((BIT_BUF_SIZE + 7) >> 3) >= s->pending_buf_size)) {
+            flush_pending(s->strm);
+            if (s->strm->avail_out == 0) {
+                return (last && s->strm->avail_in == 0) ? finish_started : need_more;
+            }
+        }
+
+        if (UNLIKELY(s->lookahead < MIN_LOOKAHEAD)) {
+            fill_window(s);
+            if (UNLIKELY(s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH)) {
+                return need_more;
+            }
+            if (UNLIKELY(s->lookahead == 0))
+                break;
+
+            if (UNLIKELY(s->block_open == 0)) {
+                /* Start new block when we have lookahead data, so that if no
+                   input data is given an empty block will not be written */
+                QUICK_START_BLOCK(s, last);
+            }
+        }
+
+        if (LIKELY(s->lookahead >= MIN_MATCH)) {
+            hash_head = functable.quick_insert_string(s, s->strstart);
+            dist = (int64_t)s->strstart - hash_head;
+
+            if (dist <= MAX_DIST(s) && dist > 0) {
+                match_len = functable.compare258(s->window + s->strstart, s->window + hash_head);
+
+                if (match_len >= MIN_MATCH) {
+                    if (UNLIKELY(match_len > s->lookahead))
+                        match_len = s->lookahead;
+
+                    check_match(s, s->strstart, hash_head, match_len);
+
+                    zng_tr_emit_dist(s, static_ltree, static_dtree, match_len - MIN_MATCH, (uint32_t)dist);
+                    s->lookahead -= match_len;
+                    s->strstart += match_len;
+                    continue;
+                }
+            }
+        }
+
+        zng_tr_emit_lit(s, static_ltree, s->window[s->strstart]);
+        s->strstart++;
+        s->lookahead--;
+    }
+
+    s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
+    if (UNLIKELY(last)) {
+        QUICK_END_BLOCK(s, 1);
+        return finish_done;
+    }
+
+    QUICK_END_BLOCK(s, 0);
+    return block_done;
+}