From patchwork Thu Sep 9 18:47:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Han-Wen Nienhuys X-Patchwork-Id: 12483665 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 A7C48C433F5 for ; Thu, 9 Sep 2021 18:48:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9243E61108 for ; Thu, 9 Sep 2021 18:48:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245136AbhIIStm (ORCPT ); Thu, 9 Sep 2021 14:49:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241940AbhIIStB (ORCPT ); Thu, 9 Sep 2021 14:49:01 -0400 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E0FDC061575 for ; Thu, 9 Sep 2021 11:47:52 -0700 (PDT) Received: by mail-wm1-x32a.google.com with SMTP id l18-20020a05600c4f1200b002f8cf606262so2260365wmq.1 for ; Thu, 09 Sep 2021 11:47:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:in-reply-to:references:from:date:subject:mime-version :content-transfer-encoding:fcc:to:cc; bh=0Ua1fCeepG0NUqNz6Kpuy2K+kf8j7GEZIvXxM3FPw28=; b=YbKNB9bpkuTiZCxeCswYCVMnxDOF/4smfwefRe9hUYAcUcLimM1iajdKMrpl/e5DRo 72IlKNWQNP7NhlJ91aBTiX2MkoHUQyYtzgS9B0NpRIsR+TKtoWjk2sIJHAN6YP4SxMEt mvQXiYZFW4vGary8WYbW7fu5qHHvlswmbt4yrvcb8ZT17sonoT6I+HJ12Wv8BktuKyLG nRHChbR/JI527ul+iruINfIakbv6NuI6wIo2dGkQ03Cd822rFdRPfgVF2i034UNXsp7I kxR2YwEyJ/bZReX3JnU7v0QDfcf2oH87m/s5aKjdx7fhkuj953HkYWNivi7C4MYQMYl7 t0pQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:mime-version:content-transfer-encoding:fcc:to:cc; bh=0Ua1fCeepG0NUqNz6Kpuy2K+kf8j7GEZIvXxM3FPw28=; b=6YNIYgXg9AyptebuUeVDLzOvksbhf/qdtUScsB9TJ73Icf/SCeDKl/I/lf+ZmQmHlh rZ0YHhgCj1nfxu66l/5Nyp3UfQos41/J4w8RJ1aVgzoNcZhS7rbyynO0teKGyKTWok6w 3ONlzQYXEE0LsOuJwmq8aYv7aPWMvwshVg4K/MHaQLl+XmbtrmB7prSWCvKn02PXOSUF cbYGqcj2QiS3xJuNmWocKl+PNmJSlXTYyK9STjyajgdkuPezlcFk0JuLKrso2rx9S76d 2GLkZXdHYy2uXT+PUP9Cbog6flrnU9BcLi958HpToBuocNCDwfa1zRUAJ9HPwPePrOSW C8yw== X-Gm-Message-State: AOAM5301xqc0nB0ewKP66w8fuJObYHSh54YrkwEREAMB3d1bPkybNkE3 T2I9GNBF7D9Bj2zLtlU7bjYdj1lbahs= X-Google-Smtp-Source: ABdhPJxrs0wIfzS7Q/Qq+ePXqZWw9Ld9dkhSJnAROM6vSP7EXEpuU/J8uYB7ZLOu1S3tFyXTu21MdA== X-Received: by 2002:a1c:28b:: with SMTP id 133mr4489204wmc.138.1631213270651; Thu, 09 Sep 2021 11:47:50 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id x9sm2189925wmi.30.2021.09.09.11.47.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Sep 2021 11:47:50 -0700 (PDT) Message-Id: In-Reply-To: References: Date: Thu, 09 Sep 2021 18:47:32 +0000 Subject: [PATCH v2 07/19] Provide zlib's uncompress2 from compat/zlib-compat.c MIME-Version: 1.0 Fcc: Sent To: git@vger.kernel.org Cc: Han-Wen Nienhuys , Carlo Marcelo Arenas =?utf-8?b?QmVsw7Nu?= , 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. Helped-by: Carlo Marcelo Arenas Belón Signed-off-by: Han-Wen Nienhuys --- Makefile | 7 +++ ci/lib.sh | 1 + compat/.gitattributes | 1 + compat/zlib-uncompress2.c | 95 +++++++++++++++++++++++++++++++++++++++ config.mak.uname | 5 +++ configure.ac | 13 ++++++ 6 files changed, 122 insertions(+) create mode 100644 compat/.gitattributes create mode 100644 compat/zlib-uncompress2.c diff --git a/Makefile b/Makefile index 14d025ea424..1c2d0e6be7c 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) # @@ -1738,6 +1740,11 @@ ifdef NO_DEFLATE_BOUND BASIC_CFLAGS += -DNO_DEFLATE_BOUND endif +ifdef NO_UNCOMPRESS2 + BASIC_CFLAGS += -DNO_UNCOMPRESS2 + REFTABLE_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..3dcb90b2839 --- /dev/null +++ b/compat/zlib-uncompress2.c @@ -0,0 +1,95 @@ +/* taken from zlib's uncompr.c + + commit cacf7f1d4e3d44d871b605da3b647f07d718623f + Author: Mark Adler + Date: Sun Jan 15 09:18:46 2017 -0800 + + zlib 1.2.11 + +*/ + +#include "../reftable/system.h" +#define z_const + +/* + * 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/config.mak.uname b/config.mak.uname index 76516aaa9a5..9beacda4434 100644 --- a/config.mak.uname +++ b/config.mak.uname @@ -258,6 +258,11 @@ ifeq ($(uname_S),FreeBSD) FILENO_IS_A_MACRO = UnfortunatelyYes endif ifeq ($(uname_S),OpenBSD) + NO_UNCOMPRESS2 = YesPlease + # Versions < 7.0 need compatibility layer + ifeq ($(shell expr "$(uname_R)" : "[1-6]\."),2) + NO_UNCOMPRESS2 = UnfortunatelyYes + endif NO_STRCASESTR = YesPlease NO_MEMMEM = YesPlease USE_ST_TIMESPEC = YesPlease diff --git a/configure.ac b/configure.ac index 031e8d3fee8..c3a913103d0 100644 --- a/configure.ac +++ b/configure.ac @@ -672,9 +672,22 @@ AC_LINK_IFELSE([ZLIBTEST_SRC], NO_DEFLATE_BOUND=yes]) LIBS="$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,