From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sheng Yong Subject: [RFC PATCH V2 1/2] mkfs.f2fs: add helper strtrim() to trim string's space Date: Sat, 28 Nov 2015 10:19:47 +0000 Message-ID: <1448705988-29484-1-git-send-email-shengyong1@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1a2VLR-00063j-H6 for linux-f2fs-devel@lists.sourceforge.net; Sat, 28 Nov 2015 02:34:37 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1a2VLO-00015N-Ec for linux-f2fs-devel@lists.sourceforge.net; Sat, 28 Nov 2015 02:34:37 +0000 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: chao2.yu@samsung.com, jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net Add a helper function strtrim() to trim space both at the beginning and end of a string. Signed-off-by: Sheng Yong --- include/f2fs_fs.h | 1 + lib/libf2fs.c | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h index 359deec..e85b2d0 100644 --- a/include/f2fs_fs.h +++ b/include/f2fs_fs.h @@ -768,6 +768,7 @@ enum { extern void ASCIIToUNICODE(u_int16_t *, u_int8_t *); extern int log_base_2(u_int32_t); +extern void strtrim(char **str); extern unsigned int addrs_per_inode(struct f2fs_inode *); extern int get_bits_in_byte(unsigned char n); diff --git a/lib/libf2fs.c b/lib/libf2fs.c index 83d1296..e901289 100644 --- a/lib/libf2fs.c +++ b/lib/libf2fs.c @@ -48,6 +48,30 @@ int log_base_2(u_int32_t num) return ret; } +void strtrim(char **str) +{ + int len = strlen(*str); + char *head = *str; + char *tail = *str + len - 1; + + while (head != tail) { + if (*head == ' ') + head++; + else { + *str = head; + break; + } + } + + while (tail != head) { + if (*tail == ' ') { + *tail = '\0'; + tail--; + } else + break; + } +} + /* * f2fs bit operations */ -- 1.9.1 ------------------------------------------------------------------------------