From patchwork Thu Jul 9 17:51:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joao Marcos Costa X-Patchwork-Id: 1326118 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bootlin.com Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4B2kZh2Mr3z9sRN for ; Fri, 10 Jul 2020 04:04:12 +1000 (AEST) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 233DA82250; Thu, 9 Jul 2020 20:03:29 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id AEDA2821F6; Thu, 9 Jul 2020 19:51:55 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_MSPIKE_H2, SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id C893D821D5 for ; Thu, 9 Jul 2020 19:51:50 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=joaomarcos.costa@bootlin.com X-Originating-IP: 46.193.64.106 Received: from localhost.localdomain (eth-east-parth2-46-193-64-106.wb.wifirst.net [46.193.64.106]) (Authenticated sender: joaomarcos.costa@bootlin.com) by relay9-d.mail.gandi.net (Postfix) with ESMTPA id 294AFFF80A; Thu, 9 Jul 2020 17:51:50 +0000 (UTC) From: Joao Marcos Costa To: u-boot@lists.denx.de Cc: joaomarcos.costa@bootlin.com, miquel.raynal@bootlin.com, thomas.petazzoni@bootlin.com Subject: [PATCH 3/4] fs/squashfs: add sources for zlib decompression Date: Thu, 9 Jul 2020 19:51:47 +0200 Message-Id: <20200709175148.17193-4-joaomarcos.costa@bootlin.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200709175148.17193-1-joaomarcos.costa@bootlin.com> References: <20200709175148.17193-1-joaomarcos.costa@bootlin.com> X-Mailman-Approved-At: Thu, 09 Jul 2020 20:03:20 +0200 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.3 at phobos.denx.de X-Virus-Status: Clean Add zlib (v1.2.11) functions to U-Boot. SquashFS depends on those functions to decompress data from a raw disk image. The actual support for zlib into SquashFS sources will be added in a follow-up commit. Signed-off-by: Joao Marcos Costa --- include/u-boot/zlib.h | 32 +++++++++++++++ lib/zlib/uncompr.c | 93 +++++++++++++++++++++++++++++++++++++++++++ lib/zlib/zlib.c | 1 + 3 files changed, 126 insertions(+) create mode 100644 lib/zlib/uncompr.c -- 2.17.1 diff --git a/include/u-boot/zlib.h b/include/u-boot/zlib.h index e23ceb50ca..65a9e1c9a5 100644 --- a/include/u-boot/zlib.h +++ b/include/u-boot/zlib.h @@ -110,6 +110,12 @@ extern "C" { # define voidp z_voidp #endif +#if defined(ZLIB_CONST) && !defined(z_const) +# define z_const const +#else +# define z_const +#endif + #if defined(__MSDOS__) && !defined(MSDOS) # define MSDOS #endif @@ -710,6 +716,32 @@ ZEXTERN uInt ZEXPORT crc32 OF((uInt crc, const Bytef *buf, uInt len)); if (crc != original_crc) error(); */ +ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + 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 actual size of the uncompressed data. + + 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 or incomplete. In + the case where there is not enough room, uncompress() will fill the output + buffer with the uncompressed data up to that point. +*/ + +ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong *sourceLen)); +/* + Same as uncompress, except that sourceLen is a pointer, where the + length of the source is *sourceLen. On return, *sourceLen is the number of + source bytes consumed. +*/ + ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, const char *version, int stream_size)); #define inflateInit(strm) \ diff --git a/lib/zlib/uncompr.c b/lib/zlib/uncompr.c new file mode 100644 index 0000000000..f03a1a865e --- /dev/null +++ b/lib/zlib/uncompr.c @@ -0,0 +1,93 @@ +/* uncompr.c -- decompress a memory buffer + * Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* @(#) $Id$ */ + +#define ZLIB_INTERNAL +#include "zlib.h" + +/* =========================================================================== + 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 (dest, destLen, source, sourceLen) + 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; +} + +int ZEXPORT uncompress (dest, destLen, source, sourceLen) + Bytef *dest; + uLongf *destLen; + const Bytef *source; + uLong sourceLen; +{ + return uncompress2(dest, destLen, source, &sourceLen); +} diff --git a/lib/zlib/zlib.c b/lib/zlib/zlib.c index 7e1570292c..05a2734086 100644 --- a/lib/zlib/zlib.c +++ b/lib/zlib/zlib.c @@ -30,3 +30,4 @@ #include "inflate.c" #include "zutil.c" #include "adler32.c" +#include "uncompr.c"