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Wed, 8 May 2019 07:29:25 -0400 From: Alexandru Ardelean To: , , , , , , , , , , , , , , , , , , , , , , , , , , 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); 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Ip=[137.71.25.57]; Helo=[nwd2mta2.analog.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR03MB2260 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190508_042930_355626_EFEEEA10 X-CRM114-Status: GOOD ( 12.96 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gregkh@linuxfoundation.org, Alexandru Ardelean , andriy.shevchenko@linux.intel.com Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.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; }