mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Philipp Zabel <p.zabel@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 1/3] fs/parseopt: Add parseopt_llu_suffix
Date: Thu,  1 Feb 2018 11:37:15 +0100	[thread overview]
Message-ID: <20180201103717.17429-1-p.zabel@pengutronix.de> (raw)

Add an option parser using strtoull_suffix that can be used to
parse a loop mount offset option.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 include/parseopt.h |  2 ++
 lib/parseopt.c     | 30 ++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/include/parseopt.h b/include/parseopt.h
index 1f9763f8c9..273a371ac3 100644
--- a/include/parseopt.h
+++ b/include/parseopt.h
@@ -1,5 +1,7 @@
 #ifndef __PARSEOPT_H__
 #define __PARSEOPT_H__
+void parseopt_llu_suffix(const char *options, const char *opt,
+			 unsigned long long *val);
 
 void parseopt_b(const char *options, const char *opt, bool *val);
 void parseopt_hu(const char *options, const char *opt, unsigned short *val);
diff --git a/lib/parseopt.c b/lib/parseopt.c
index 8211733e3b..70983066d9 100644
--- a/lib/parseopt.c
+++ b/lib/parseopt.c
@@ -122,3 +122,33 @@ again:
 
 	*val = xstrndup(parsed, endp - parsed);
 }
+
+void parseopt_llu_suffix(const char *options, const char *opt,
+			 unsigned long long *val)
+{
+	const char *start;
+	size_t optlen = strlen(opt);
+	unsigned long long v;
+	char *endp;
+
+again:
+	start = strstr(options, opt);
+
+	if (!start)
+		return;
+
+	if (start > options && start[-1] != ',') {
+		options = start;
+		goto again;
+	}
+
+	if (start[optlen] != '=') {
+		options = start;
+		goto again;
+	}
+
+	v = strtoull_suffix(start + optlen + 1, &endp, 0);
+
+	if (*endp == ',' || *endp == '\0')
+		*val = v;
+}
-- 
2.15.1


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

             reply	other threads:[~2018-02-01 10:37 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-01 10:37 Philipp Zabel [this message]
2018-02-01 10:37 ` [PATCH 2/3] filetype: Add type detection at an offset Philipp Zabel
2018-02-01 10:37 ` [PATCH 3/3] fs: add support loop mount offset Philipp Zabel
2018-02-05  7:26 ` [PATCH 1/3] fs/parseopt: Add parseopt_llu_suffix Sascha Hauer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180201103717.17429-1-p.zabel@pengutronix.de \
    --to=p.zabel@pengutronix.de \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox