From patchwork Tue Nov 6 06:10:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sharat Masetty X-Patchwork-Id: 10669685 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2EBC514BD for ; Tue, 6 Nov 2018 06:10:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E17629A60 for ; Tue, 6 Nov 2018 06:10:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1258329AB4; Tue, 6 Nov 2018 06:10:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CF09629A60 for ; Tue, 6 Nov 2018 06:10:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6B1FB6E259; Tue, 6 Nov 2018 06:10:25 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id 85D8F6E24D; Tue, 6 Nov 2018 06:10:24 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 7245060791; Tue, 6 Nov 2018 06:10:24 +0000 (UTC) Received: from smasetty-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: smasetty@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5B06B605FD; Tue, 6 Nov 2018 06:10:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5B06B605FD From: Sharat Masetty To: freedreno@lists.freedesktop.org Subject: [PATCH 2/3] include/linux/ascii85: Add ascii85_encode_to_buf() Date: Tue, 6 Nov 2018 11:40:05 +0530 Message-Id: <1541484606-20813-2-git-send-email-smasetty@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1541484606-20813-1-git-send-email-smasetty@codeaurora.org> References: <1541484606-20813-1-git-send-email-smasetty@codeaurora.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Sharat Masetty , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add a new function which, in addition to ascii85 encoding to buffer also returns the length of the encoded string. The length return enables iteration over the output buffer space. This helps with efficient encoding of larger buffers, since we avoid an additional memcpy/scnprintf. Signed-off-by: Sharat Masetty --- include/linux/ascii85.h | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/include/linux/ascii85.h b/include/linux/ascii85.h index 4cc4020..3665899 100644 --- a/include/linux/ascii85.h +++ b/include/linux/ascii85.h @@ -23,8 +23,12 @@ { int i; - if (in == 0) - return "z"; + if (in == 0) { + out[0] = 'z'; + out[1] = '\0'; + + return out; + } out[5] = '\0'; for (i = 5; i--; ) { @@ -35,4 +39,15 @@ return out; } +static inline size_t +ascii85_encode_to_buf(u32 in, char *out) +{ + ascii85_encode(in, out); + + if (in == 0) + return 1; + + return 5; +} + #endif