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Wed, 8 May 2019 11:29:26 +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 x48BTPmx016989 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=OK); Wed, 8 May 2019 04:29:25 -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 07:29:25 -0400 From: Alexandru Ardelean To: , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , Alexandru Ardelean Subject: [PATCH 01/16] lib: fix match_string() helper when array size is positive Date: Wed, 8 May 2019 14:28:27 +0300 Message-ID: <20190508112842.11654-3-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)(346002)(376002)(39860400002)(396003)(136003)(2980300002)(189003)(199004)(246002)(8676002)(356004)(5660300002)(1076003)(8936002)(50226002)(53416004)(7416002)(305945005)(2441003)(47776003)(478600001)(7636002)(336012)(107886003)(77096007)(4326008)(186003)(446003)(26005)(44832011)(126002)(476003)(2616005)(11346002)(486006)(86362001)(76176011)(7696005)(51416003)(426003)(14444005)(36756003)(2201001)(48376002)(54906003)(70586007)(110136005)(70206006)(16586007)(316002)(50466002)(2906002)(106002)(921003)(2101003)(1121003)(83996005);DIR:OUT;SFP:1101;SCL:1;SRVR:BN3PR03MB2260;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: 06992cbe-c2a0-450f-a978-08d6d3a86d64 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4709054)(2017052603328);SRVR:BN3PR03MB2260; X-MS-TrafficTypeDiagnostic: BN3PR03MB2260: 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: HMrFOjcKVNRTHDmX1/HvU/gXQlBl+uBSOtcwOD51vWmdyi5ZtZaq4HeTrVqglmQielk1qFJ8dbdhoPs7SBm2gQas++XsjhD055LJSrs5xjRibQaqSBcjHQ44wcFTrBpHBH89k3Ki8Yow3eXIUMpM+NlewIkNIJV3DPQLKY30RuyrOhfh8nkva9n/YB2AL2kQU6YR15UTz29qyv7g67oh8CMTWpMo3frw6vU81LMqNBFZ66OrPeZSiSJAkJBE/bMd3zQC4Hxw9oF5//2KgiJjBZpmuL6vm8U1PSkG8Dxc2tota5ciVE6wTr78/CN6CfJNaW+OzxN0iMIV1Ig8ZSn8zd4ymGDzX2XaqHB1wZ4OfMvmgpNKxP1+GEdfSFMqVRyw0npwgjP2wrgtmFovCAalytU1DI/oSEu8S/98Y5oQHkE= X-OriginatorOrg: analog.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 May 2019 11:29:26.1629 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 06992cbe-c2a0-450f-a978-08d6d3a86d64 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: BN3PR03MB2260 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` (size of the given array) 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; }