zlib-ng: avoid suppressing WD4242 and WD4244

src/mono/mono/metadata/class-internals.h

@@ -1467,7 +1467,7 @@ mono_method_has_unmanaged_callers_only_attribute (MonoMethod *method);
 
 typedef struct _MonoVarianceSearchTableEntry {
     MonoClass *klass;
-    guint16 offset;
+    int offset;
 } MonoVarianceSearchTableEntry;
 
 MonoVarianceSearchTableEntry *

src/native/external/zlib-ng-version.txt

@@ -8,3 +8,5 @@ We have removed the following folders from our local copy as these files are not
 - zlib-ng/docs/
 - zlib-ng/test/
 - zlib-ng/arch/s390/self-hosted-builder/
+
+We have also applied the custom patches under the patches/zlib-ng/ folder.

src/native/external/zlib-ng.cmake

@@ -15,8 +15,6 @@ set(WITH_RVV OFF)
 add_compile_options($<$<COMPILE_LANG_AND_ID:C,Clang,AppleClang>:-Wno-unused-command-line-argument>) # clang : error : argument unused during compilation: '-fno-semantic-interposition'
 add_compile_options($<$<COMPILE_LANG_AND_ID:C,Clang,AppleClang>:-Wno-logical-op-parentheses>) # place parentheses around the '&&' expression to silence this warning
 add_compile_options($<$<COMPILE_LANG_AND_ID:C,MSVC>:/wd4127>) # warning C4127: conditional expression is constant
-add_compile_options($<$<COMPILE_LANG_AND_ID:C,MSVC>:/wd4242>) # 'function': conversion from 'unsigned int' to 'Pos', possible loss of data, in various deflate_*.c files
-add_compile_options($<$<COMPILE_LANG_AND_ID:C,MSVC>:/wd4244>) # 'function': conversion from 'unsigned int' to 'Pos', possible loss of data, in various deflate_*.c files
 
 # 'aligned_alloc' is not available in browser/wasi, yet it is set by zlib-ng/CMakeLists.txt.
 if (CLR_CMAKE_TARGET_BROWSER OR CLR_CMAKE_TARGET_WASI)

src/native/external/zlib-ng/arch/arm/slide_hash_armv6.c

@@ -7,6 +7,7 @@
 #include "acle_intrins.h"
 #include "../../zbuild.h"
 #include "../../deflate.h"
+#include <assert.h>
 
 /* SIMD version of hash_chain rebase */
 static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) {
@@ -39,7 +40,8 @@ static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize
 }
 
 Z_INTERNAL void slide_hash_armv6(deflate_state *s) {
-    unsigned int wsize = s->w_size;
+    assert(s->w_size <= UINT16_MAX);
+    uint16_t wsize = (uint16_t)s->w_size;
 
     slide_hash_chain(s->head, HASH_SIZE, wsize);
     slide_hash_chain(s->prev, wsize, wsize);

src/native/external/zlib-ng/arch/arm/slide_hash_neon.c

@@ -12,6 +12,7 @@
 #include "neon_intrins.h"
 #include "../../zbuild.h"
 #include "../../deflate.h"
+#include <assert.h>
 
 /* SIMD version of hash_chain rebase */
 static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) {
@@ -38,7 +39,8 @@ static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize
 }
 
 Z_INTERNAL void slide_hash_neon(deflate_state *s) {
-    unsigned int wsize = s->w_size;
+    assert(s->w_size <= UINT16_MAX);
+    uint16_t wsize = (uint16_t)s->w_size;
 
     slide_hash_chain(s->head, HASH_SIZE, wsize);
     slide_hash_chain(s->prev, wsize, wsize);

src/native/external/zlib-ng/arch/power/slide_ppc_tpl.h

@@ -6,6 +6,7 @@
 #include <altivec.h>
 #include "zbuild.h"
 #include "deflate.h"
+#include <assert.h>
 
 static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) {
     const vector unsigned short vmx_wsize = vec_splats(wsize);
@@ -24,7 +25,8 @@ static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize
 }
 
 void Z_INTERNAL SLIDE_PPC(deflate_state *s) {
-    uint16_t wsize = s->w_size;
+    assert(s->w_size <= UINT16_MAX);
+    uint16_t wsize = (uint16_t)s->w_size;
 
     slide_hash_chain(s->head, HASH_SIZE, wsize);
     slide_hash_chain(s->prev, wsize, wsize);

src/native/external/zlib-ng/arch/riscv/slide_hash_rvv.c

@@ -10,6 +10,7 @@
 
 #include "../../zbuild.h"
 #include "../../deflate.h"
+#include <assert.h>
 
 static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize) {
     size_t vl;
@@ -25,6 +26,7 @@ static inline void slide_hash_chain(Pos *table, uint32_t entries, uint16_t wsize
 }
 
 Z_INTERNAL void slide_hash_rvv(deflate_state *s) {
+    assert(s->w_size <= UINT16_MAX);
     uint16_t wsize = (uint16_t)s->w_size;
 
     slide_hash_chain(s->head, HASH_SIZE, wsize);

src/native/external/zlib-ng/arch/x86/slide_hash_avx2.c

@@ -13,6 +13,7 @@
 #include "../../deflate.h"
 
 #include <immintrin.h>
+#include <assert.h>
 
 static inline void slide_hash_chain(Pos *table, uint32_t entries, const __m256i wsize) {
     table += entries;
@@ -31,6 +32,7 @@ static inline void slide_hash_chain(Pos *table, uint32_t entries, const __m256i
 }
 
 Z_INTERNAL void slide_hash_avx2(deflate_state *s) {
+    assert(s->w_size <= UINT16_MAX);
     uint16_t wsize = (uint16_t)s->w_size;
     const __m256i ymm_wsize = _mm256_set1_epi16((short)wsize);
 

src/native/external/zlib-ng/arch/x86/slide_hash_sse2.c

@@ -52,6 +52,7 @@ static inline void slide_hash_chain(Pos *table0, Pos *table1, uint32_t entries0,
 }
 
 Z_INTERNAL void slide_hash_sse2(deflate_state *s) {
+    assert(s->w_size <= UINT16_MAX);
     uint16_t wsize = (uint16_t)s->w_size;
     const __m128i xmm_wsize = _mm_set1_epi16((short)wsize);
 

src/native/external/zlib-ng/deflate_fast.c

@@ -58,7 +58,9 @@ Z_INTERNAL block_state deflate_fast(deflate_state *s, int flush) {
         }
 
         if (match_len >= WANT_MIN_MATCH) {
-            check_match(s, s->strstart, s->match_start, match_len);
+            Assert(s->strstart <= UINT16_MAX, "strstart should fit in uint16_t");
+            Assert(s->match_start <= UINT16_MAX, "match_start should fit in uint16_t");
+            check_match(s, (Pos)s->strstart, (Pos)s->match_start, match_len);
 
             bflush = zng_tr_tally_dist(s, s->strstart - s->match_start, match_len - STD_MIN_MATCH);
 

src/native/external/zlib-ng/deflate_quick.c

@@ -102,7 +102,8 @@ Z_INTERNAL block_state deflate_quick(deflate_state *s, int flush) {
                         if (UNLIKELY(match_len > STD_MAX_MATCH))
                             match_len = STD_MAX_MATCH;
 
-                        check_match(s, s->strstart, hash_head, match_len);
+                        Assert(s->strstart <= UINT16_MAX, "strstart should fit in uint16_t");
+                        check_match(s, (Pos)s->strstart, hash_head, match_len);
 
                         zng_tr_emit_dist(s, static_ltree, static_dtree, match_len - STD_MIN_MATCH, (uint32_t)dist);
                         s->lookahead -= match_len;

src/native/external/zlib-ng/deflate_rle.c

@@ -58,7 +58,9 @@ Z_INTERNAL block_state deflate_rle(deflate_state *s, int flush) {
 
         /* Emit match if have run of STD_MIN_MATCH or longer, else emit literal */
         if (match_len >= STD_MIN_MATCH) {
-            check_match(s, s->strstart, s->strstart - 1, match_len);
+            Assert(s->strstart <= UINT16_MAX, "strstart should fit in uint16_t");
+            Assert(s->match_start <= UINT16_MAX, "match_start should fit in uint16_t");
+            check_match(s, (Pos)s->strstart, (Pos)s->strstart - 1, match_len);
 
             bflush = zng_tr_tally_dist(s, 1, match_len - STD_MIN_MATCH);
 

src/native/external/zlib-ng/deflate_slow.c

@@ -78,7 +78,8 @@ Z_INTERNAL block_state deflate_slow(deflate_state *s, int flush) {
             unsigned int max_insert = s->strstart + s->lookahead - STD_MIN_MATCH;
             /* Do not insert strings in hash table beyond this. */
 
-            check_match(s, s->strstart-1, s->prev_match, s->prev_length);
+            Assert((s->strstart-1) <= UINT16_MAX,"strstart-1 should fit in uint16_t");
+            check_match(s, (Pos)(s->strstart-1), s->prev_match, s->prev_length);
 
             bflush = zng_tr_tally_dist(s, s->strstart -1 - s->prev_match, s->prev_length - STD_MIN_MATCH);