From patchwork Tue Jul 20 17:04:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Han-Wen Nienhuys X-Patchwork-Id: 12388849 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6832FC07E95 for ; Tue, 20 Jul 2021 17:06:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50898610D2 for ; Tue, 20 Jul 2021 17:06:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231562AbhGTQZk (ORCPT ); Tue, 20 Jul 2021 12:25:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232187AbhGTQYS (ORCPT ); Tue, 20 Jul 2021 12:24:18 -0400 Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8B23C0613DD for ; Tue, 20 Jul 2021 10:04:54 -0700 (PDT) Received: by mail-wm1-x32f.google.com with SMTP id l17-20020a05600c1d11b029021f84fcaf75so1918128wms.1 for ; Tue, 20 Jul 2021 10:04:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=KhfP5Pi6SX1nvOeb1sKm3lJWDkHx7oyAGRasn4OX32A=; b=B7EPnf6i2QBB0PRyfkU3pzgOOE/0SVbKnkWrFvBJ3YCH/ISed2/AD23ib20IjUBATc BOcezOtTsraf/pDTxhSWn5gfcp7H2CN8dNn7N8RuMwJP8hgkfpwyyOoycbw9rOD/4jze au+CHay20/Y1Pku5x8/o9yGS142GnE/gke30PxShfC96AjR/H5fqlw4JRP1cKstkidkU aaxMyshE8HMVnTWTTyNbcas9TCBHruEGccERBypLY8aL4CHRAP3SDkvF4/1W5imZ3tqO bDLjkicDmgbe/iRLJnzyfL6+R1byg4kwW2tevbCdtUlyuerffdEwcIzrZW016+do03Mv N1VA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=KhfP5Pi6SX1nvOeb1sKm3lJWDkHx7oyAGRasn4OX32A=; b=q0+baWmfkIXpX2GKQ72ADGUbl+mpSUwUTL1ocHfEs0EsU697lAvzYBS8qTL+jo5MWM PLxAnto0/UVyaimKfcDObZ9MDwOK/5inqD0xRagR5JYl8dfJSaxibwdzFD3ywbDIsCE+ 4HWB3BFXS3fZITjNoSLcjhf335w/7cGx65jNnoBDbKkajmhioU4a548TUj0jdzmW5Q3g daiYix4MnNEhH0rgmJZ6tXo4uXqAQp1AqwfKMRo9NNUAB/zFujFk/5VW1YTUOtWoWOyw 9zXj+y7EkKY7+q/1NxjVoubj4hddfFyTOuJDbTPn8uuCs9vy2oRyBgPbQ0JQHV6/9ihv NY6Q== X-Gm-Message-State: AOAM533cDyItT6T6x4SN6kOuBMUvZpvIqRFWBssZD7MrKFECttyw88vf hOGQzknmQhXJjIfT9J91nqO2wfARuz0= X-Google-Smtp-Source: ABdhPJzGey6+fQ2vurDMYYG0MsnG+qCjv5yOu+t/+KTADmAuRreEBcHFdhncilqUd9nkNLSlPdKcng== X-Received: by 2002:a1c:35c2:: with SMTP id c185mr32318162wma.126.1626800693327; Tue, 20 Jul 2021 10:04:53 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id d29sm29695319wrb.63.2021.07.20.10.04.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Jul 2021 10:04:52 -0700 (PDT) Message-Id: <27abd15965875115f641ed9e0cb1a8732369eddb.1626800686.git.gitgitgadget@gmail.com> In-Reply-To: References: Date: Tue, 20 Jul 2021 17:04:28 +0000 Subject: [PATCH 08/26] Provide zlib's uncompress2 from compat/zlib-compat.c Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: Han-Wen Nienhuys , Han-Wen Nienhuys Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Han-Wen Nienhuys From: Han-Wen Nienhuys This will be needed for reading reflog blocks in reftable. Signed-off-by: Han-Wen Nienhuys --- Makefile | 7 +++ ci/lib.sh | 1 + compat/.gitattributes | 1 + compat/zlib-uncompress2.c | 92 +++++++++++++++++++++++++++++++++++++++ configure.ac | 13 ++++++ 5 files changed, 114 insertions(+) create mode 100644 compat/.gitattributes create mode 100644 compat/zlib-uncompress2.c diff --git a/Makefile b/Makefile index 15321edbd2c..640a332b481 100644 --- a/Makefile +++ b/Makefile @@ -256,6 +256,8 @@ all:: # # Define NO_DEFLATE_BOUND if your zlib does not have deflateBound. # +# Define NO_UNCOMPRESS2 if your zlib does not have uncompress2. +# # Define NO_NORETURN if using buggy versions of gcc 4.6+ and profile feedback, # as the compiler can crash (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49299) # @@ -1734,6 +1736,11 @@ ifdef NO_DEFLATE_BOUND BASIC_CFLAGS += -DNO_DEFLATE_BOUND endif +ifdef NO_UNCOMPRESS2 + BASIC_CFLAGS += -DNO_UNCOMPRESS2 + LIB_OBJS += compat/zlib-uncompress2.o +endif + ifdef NO_POSIX_GOODIES BASIC_CFLAGS += -DNO_POSIX_GOODIES endif diff --git a/ci/lib.sh b/ci/lib.sh index 476c3f369f5..5711c63979d 100755 --- a/ci/lib.sh +++ b/ci/lib.sh @@ -224,6 +224,7 @@ linux-gcc-default) ;; Linux32) CC=gcc + MAKEFLAGS="$MAKEFLAGS NO_UNCOMPRESS2=1" ;; linux-musl) CC=gcc diff --git a/compat/.gitattributes b/compat/.gitattributes new file mode 100644 index 00000000000..40dbfb170da --- /dev/null +++ b/compat/.gitattributes @@ -0,0 +1 @@ +/zlib-uncompress2.c whitespace=-indent-with-non-tab,-trailing-space diff --git a/compat/zlib-uncompress2.c b/compat/zlib-uncompress2.c new file mode 100644 index 00000000000..6893bb469ce --- /dev/null +++ b/compat/zlib-uncompress2.c @@ -0,0 +1,92 @@ +/* taken from zlib's uncompr.c + + commit cacf7f1d4e3d44d871b605da3b647f07d718623f + Author: Mark Adler + Date: Sun Jan 15 09:18:46 2017 -0800 + + zlib 1.2.11 + +*/ + +/* + * Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +#include + +/* clang-format off */ + +/* =========================================================================== + Decompresses the source buffer into the destination buffer. *sourceLen is + the byte length of the source buffer. Upon entry, *destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, + *destLen is the size of the decompressed data and *sourceLen is the number + of source bytes consumed. Upon return, source + *sourceLen points to the + first unused input byte. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_BUF_ERROR if there was not enough room in the output buffer, or + Z_DATA_ERROR if the input data was corrupted, including if the input data is + an incomplete zlib stream. +*/ +int ZEXPORT uncompress2 ( + Bytef *dest, + uLongf *destLen, + const Bytef *source, + uLong *sourceLen) { + z_stream stream; + int err; + const uInt max = (uInt)-1; + uLong len, left; + Byte buf[1]; /* for detection of incomplete stream when *destLen == 0 */ + + len = *sourceLen; + if (*destLen) { + left = *destLen; + *destLen = 0; + } + else { + left = 1; + dest = buf; + } + + stream.next_in = (z_const Bytef *)source; + stream.avail_in = 0; + stream.zalloc = (alloc_func)0; + stream.zfree = (free_func)0; + stream.opaque = (voidpf)0; + + err = inflateInit(&stream); + if (err != Z_OK) return err; + + stream.next_out = dest; + stream.avail_out = 0; + + do { + if (stream.avail_out == 0) { + stream.avail_out = left > (uLong)max ? max : (uInt)left; + left -= stream.avail_out; + } + if (stream.avail_in == 0) { + stream.avail_in = len > (uLong)max ? max : (uInt)len; + len -= stream.avail_in; + } + err = inflate(&stream, Z_NO_FLUSH); + } while (err == Z_OK); + + *sourceLen -= len + stream.avail_in; + if (dest != buf) + *destLen = stream.total_out; + else if (stream.total_out && err == Z_BUF_ERROR) + left = 1; + + inflateEnd(&stream); + return err == Z_STREAM_END ? Z_OK : + err == Z_NEED_DICT ? Z_DATA_ERROR : + err == Z_BUF_ERROR && left + stream.avail_out ? Z_DATA_ERROR : + err; +} diff --git a/configure.ac b/configure.ac index 031e8d3fee8..c3a913103d0 100644 --- a/configure.ac +++ b/configure.ac @@ -672,9 +672,22 @@ AC_LINK_IFELSE([ZLIBTEST_SRC], NO_DEFLATE_BOUND=yes]) LIBS="$old_LIBS" +AC_DEFUN([ZLIBTEST_UNCOMPRESS2_SRC], [ +AC_LANG_PROGRAM([#include ], + [uncompress2(NULL,NULL,NULL,NULL);])]) +AC_MSG_CHECKING([for uncompress2 in -lz]) +old_LIBS="$LIBS" +LIBS="$LIBS -lz" +AC_LINK_IFELSE([ZLIBTEST_UNCOMPRESS2_SRC], + [AC_MSG_RESULT([yes])], + [AC_MSG_RESULT([no]) + NO_UNCOMPRESS2=yes]) +LIBS="$old_LIBS" + GIT_UNSTASH_FLAGS($ZLIB_PATH) GIT_CONF_SUBST([NO_DEFLATE_BOUND]) +GIT_CONF_SUBST([NO_UNCOMPRESS2]) # # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,