feat(rust): port deprecated ZBUFF streaming wrappers

Move the public ZBUFF compatibility layer into the Rust static archive while keeping stream contexts opaque and forwarding to the current ZSTD streaming APIs. The deprecated C translation units are now declaration-only shims, so the compatibility symbols work in compression-only and decompression-only feature builds without duplicating private context layouts. Test Plan: - cargo test --manifest-path rust/Cargo.toml - cargo clippy --manifest-path rust/Cargo.toml --all-targets -- -D warnings - cargo +nightly fmt --manifest-path rust/Cargo.toml -- --check - make -B -C lib libzstd.a ZSTD_LIB_DEPRECATED=1 V=1 - C ZBUFF compress/decompress smoke test against the rebuilt static archive Depends-on: Rust compression and decompression streaming ABI ports
2026-07-12 09:59:58 +02:00
parent 5d03dca147
commit 70260b308b
5 changed files with 367 additions and 270 deletions
@@ -1,77 +1 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- * All rights reserved.
- *
- * This source code is licensed under both the BSD-style license (found in the
- * LICENSE file in the root directory of this source tree) and the GPLv2 (found
- * in the COPYING file in the root directory of this source tree).
- * You may select, at your option, one of the above-listed licenses.
- */
-
-
-
-/* *************************************
-*  Dependencies
-***************************************/
-#define ZSTD_DISABLE_DEPRECATE_WARNINGS  /* suppress warning on ZSTD_initDStream_usingDict */
-#include "../zstd.h"        /* ZSTD_CStream, ZSTD_DStream, ZSTDLIB_API */
-#define ZBUFF_STATIC_LINKING_ONLY
-#include "zbuff.h"
-
-
-ZBUFF_DCtx* ZBUFF_createDCtx(void)
-{
-    return ZSTD_createDStream();
-}
-
-ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem)
-{
-    return ZSTD_createDStream_advanced(customMem);
-}
-
-size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbd)
-{
-    return ZSTD_freeDStream(zbd);
-}
-
-
-/* *** Initialization *** */
-
-size_t ZBUFF_decompressInitDictionary(ZBUFF_DCtx* zbd, const void* dict, size_t dictSize)
-{
-    return ZSTD_initDStream_usingDict(zbd, dict, dictSize);
-}
-
-size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbd)
-{
-    return ZSTD_initDStream(zbd);
-}
-
-
-/* *** Decompression *** */
-
-size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbd,
-                                void* dst, size_t* dstCapacityPtr,
-                          const void* src, size_t* srcSizePtr)
-{
-    ZSTD_outBuffer outBuff;
-    ZSTD_inBuffer inBuff;
-    size_t result;
-    outBuff.dst  = dst;
-    outBuff.pos  = 0;
-    outBuff.size = *dstCapacityPtr;
-    inBuff.src  = src;
-    inBuff.pos  = 0;
-    inBuff.size = *srcSizePtr;
-    result = ZSTD_decompressStream(zbd, &outBuff, &inBuff);
-    *dstCapacityPtr = outBuff.pos;
-    *srcSizePtr = inBuff.pos;
-    return result;
-}
-
-
-/* *************************************
-*  Tool functions
-***************************************/
-size_t ZBUFF_recommendedDInSize(void)  { return ZSTD_DStreamInSize(); }
-size_t ZBUFF_recommendedDOutSize(void) { return ZSTD_DStreamOutSize(); }
+/* ZBUFF compatibility symbols are implemented by rust/src/zbuff.rs. */