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Wed, 8 May 2019 11:29:21 +0000 Received: from NWD2HUBCAS7.ad.analog.com (nwd2hubcas7.ad.analog.com [10.64.69.107]) by nwd2mta2.analog.com (8.13.8/8.13.8) with ESMTP id x48BTLLf016976 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=OK); Wed, 8 May 2019 04:29:21 -0700 Received: from saturn.analog.com (10.50.1.244) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Wed, 8 May 2019 07:29:20 -0400 From: Alexandru Ardelean To: , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , Alexandru Ardelean Subject: [PATCH 01/16] lib: fix match_string() helper on -1 array size Date: Wed, 8 May 2019 14:28:26 +0300 Message-ID: <20190508112842.11654-2-alexandru.ardelean@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190508112842.11654-1-alexandru.ardelean@analog.com> References: <20190508112842.11654-1-alexandru.ardelean@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.57;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(1496009)(376002)(136003)(346002)(396003)(39860400002)(2980300002)(189003)(199004)(316002)(50466002)(110136005)(106002)(76176011)(36756003)(70206006)(70586007)(86362001)(7696005)(2201001)(14444005)(51416003)(478600001)(7416002)(47776003)(5660300002)(54906003)(2906002)(48376002)(2441003)(16586007)(186003)(446003)(1076003)(77096007)(26005)(356004)(44832011)(486006)(11346002)(126002)(476003)(2616005)(8676002)(107886003)(50226002)(246002)(4326008)(8936002)(53416004)(336012)(426003)(305945005)(7636002)(921003)(83996005)(1121003)(2101003);DIR:OUT;SFP:1101;SCL:1;SRVR:BY2PR03MB555;H:nwd2mta2.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail11.analog.com;MX:1;A:1; X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 70d6917f-f215-4387-ffab-08d6d3a86a83 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4709054)(2017052603328);SRVR:BY2PR03MB555; X-MS-TrafficTypeDiagnostic: BY2PR03MB555: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; X-Forefront-PRVS: 0031A0FFAF X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Message-Info: EkinRue+oHsKHGU9xDPLwqOdJf0rruOZsQl/MCUDoHLxNCdgn+nCd693zRNYU/ul1uHwi/NkPHY62bVRycjk68l9ukT0lp/PIvbvAeGJuTyMBkoJ3LpwJP8AA+6sLGnOa8vypJGw5A8ov1fhv+lnNuk1SC4UW2SeilXkocHeKVTMVkRDO7wzTR6RAbvOq3Phku6T4Mqk2uNO2cTYTiWtoVqA5zyZilUa02oDdwvX2fN0a6JKWMc78cXM7mRR6ztmm/mvcHmERSY8EOpP5AiLIlza+si/G6jqjYxnnCbUx4RESiHtbIqq5bHx5HK13JjNtN5Ds4dH99JuuG6yIO7bb3t3mX15z/334BxveeoKGCgniaZZ1TMVBIT/ECNdU5U8sORBD+6hB+zyeFXFq3pz2/N8I/LejN9R3O2T8knNZfU= X-OriginatorOrg: analog.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 May 2019 11:29:21.3354 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 70d6917f-f215-4387-ffab-08d6d3a86a83 X-MS-Exchange-CrossTenant-Id: eaa689b4-8f87-40e0-9c6f-7228de4d754a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=eaa689b4-8f87-40e0-9c6f-7228de4d754a;Ip=[137.71.25.57];Helo=[nwd2mta2.analog.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR03MB555 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The documentation the `_match_string()` helper mentions that `n` should be: * @n: number of strings in the array or -1 for NULL terminated arrays The behavior of the function is different, in the sense that it exits on the first NULL element in the array, regardless of whether `n` is -1 or a positive number. This patch changes the behavior, to exit the loop when a NULL element is found and n == -1. Essentially, this aligns the behavior with the doc-string. There are currently many users of `match_string()`, and so, in order to go through them, the next patches in the series will focus on doing some cosmetic changes, which are aimed at grouping the users of `match_string()`. Signed-off-by: Alexandru Ardelean --- lib/string.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/lib/string.c b/lib/string.c index 3ab861c1a857..76edb7bf76cb 100644 --- a/lib/string.c +++ b/lib/string.c @@ -648,8 +648,11 @@ int match_string(const char * const *array, size_t n, const char *string) for (index = 0; index < n; index++) { item = array[index]; - if (!item) + if (!item) { + if (n != (size_t)-1) + continue; break; + } if (!strcmp(item, string)) return index; }