From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Rasmus Villemoes <rasmus.villemoes@prevas.dk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
linux-rtc@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Guan Xuetao <gxt@mprc.pku.edu.cn>, Ingo Molnar <mingo@kernel.org>,
Jason Wessel <jason.wessel@windriver.com>,
Jonathan Corbet <corbet@lwn.net>,
Jonathan Hunter <jonathanh@nvidia.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Thierry Reding <thierry.reding@gmail.com>
Subject: [PATCH v1 04/25] lib/vsprintf: Print time and date in human readable format via %pt
Date: Thu, 8 Jun 2017 16:47:50 +0300 [thread overview]
Message-ID: <20170608134811.60786-5-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20170608134811.60786-1-andriy.shevchenko@linux.intel.com>
There are users which print time and date represented by content of
struct rtc_time in human readable format.
Instead of open coding that each time introduce %pt[dt][rv] specifier.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
Documentation/printk-formats.txt | 17 ++++++
lib/vsprintf.c | 124 +++++++++++++++++++++++++++++++++++++++
2 files changed, 141 insertions(+)
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index d8c40c30118a..fa5b718a5dcc 100644
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -282,6 +282,23 @@ struct va_format:
Passed by reference.
+struct rtc_time:
+
+ %pt YYYY-mm-dd HH:MM:SS
+ %ptd YYYY-mm-dd
+ %ptt HH:MM:SS
+ %pt[dt][rv]
+
+ For printing date and time as represented by struct rtc_time
+ structure in human readable format.
+
+ By default year will be incremented by 1900 and month by 1. Use
+ 'r' (raw) to suppress this behaviour. On the other hand when
+ 'v' is applied validation mechanism will be in use, i.e. numbers
+ out of range will be replaced by '**' or '****'.
+
+ Passed by reference.
+
struct clk:
%pC pll1
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 001303612b55..653d08b50850 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -30,6 +30,7 @@
#include <linux/ioport.h>
#include <linux/dcache.h>
#include <linux/cred.h>
+#include <linux/rtc.h>
#include <linux/uuid.h>
#include <net/addrconf.h>
#ifdef CONFIG_BLOCK
@@ -701,6 +702,20 @@ static const struct printf_spec default_dec_spec = {
.precision = -1,
};
+static const struct printf_spec default_dec02_spec = {
+ .base = 10,
+ .field_width = 2,
+ .precision = -1,
+ .flags = ZEROPAD,
+};
+
+static const struct printf_spec default_dec04_spec = {
+ .base = 10,
+ .field_width = 4,
+ .precision = -1,
+ .flags = ZEROPAD,
+};
+
static noinline_for_stack
char *resource_string(char *buf, char *end, struct resource *res,
struct printf_spec spec, const char *fmt)
@@ -1382,6 +1397,112 @@ char *address_val(char *buf, char *end, const void *addr, const char *fmt)
}
static noinline_for_stack
+char *date_string(char *buf, char *end, const struct rtc_time *tm, bool v, bool r)
+{
+ int year = tm->tm_year + (r ? 0 : 1900);
+ int mon = tm->tm_mon + (r ? 0 : 1);
+
+ if (unlikely(v && (unsigned int)tm->tm_year > 200))
+ buf = string(buf, end, "****", default_str_spec);
+ else
+ buf = number(buf, end, year, default_dec04_spec);
+
+ if (buf < end)
+ *buf = '-';
+ buf++;
+
+ if (unlikely(v && (unsigned int)tm->tm_mon > 11))
+ buf = string(buf, end, "**", default_str_spec);
+ else
+ buf = number(buf, end, mon, default_dec02_spec);
+
+ if (buf < end)
+ *buf = '-';
+ buf++;
+
+ if (unlikely(v && (unsigned int)tm->tm_mday > 31))
+ buf = string(buf, end, "**", default_str_spec);
+ else
+ buf = number(buf, end, tm->tm_mday, default_dec02_spec);
+
+ return buf;
+}
+
+static noinline_for_stack
+char *time_string(char *buf, char *end, const struct rtc_time *tm, bool v, bool r)
+{
+ if (unlikely(v && (unsigned int)tm->tm_hour > 24))
+ buf = string(buf, end, "**", default_str_spec);
+ else
+ buf = number(buf, end, tm->tm_hour, default_dec02_spec);
+
+ if (buf < end)
+ *buf = ':';
+ buf++;
+
+ if (unlikely(v && (unsigned int)tm->tm_min > 59))
+ buf = string(buf, end, "**", default_str_spec);
+ else
+ buf = number(buf, end, tm->tm_min, default_dec02_spec);
+
+ if (buf < end)
+ *buf = ':';
+ buf++;
+
+ if (unlikely(v && (unsigned int)tm->tm_sec > 59))
+ buf = string(buf, end, "**", default_str_spec);
+ else
+ buf = number(buf, end, tm->tm_sec, default_dec02_spec);
+
+ return buf;
+}
+
+static noinline_for_stack
+char *timeanddate(char *buf, char *end, const struct rtc_time *tm, const char *fmt)
+{
+ bool have_t = true, have_d = true;
+ bool validate = false;
+ bool raw = false;
+ int count = 0;
+ bool found;
+
+ switch (fmt[++count]) {
+ case 'd':
+ have_t = false;
+ break;
+ case 't':
+ have_d = false;
+ break;
+ }
+
+ /* No %pt[dt] supplied */
+ if (have_t && have_d)
+ --count;
+
+ found = true;
+ do {
+ switch (fmt[++count]) {
+ case 'r':
+ raw = true;
+ break;
+ case 'v':
+ validate = true;
+ break;
+ default:
+ found = false;
+ break;
+ }
+ } while (found);
+
+ if (have_d)
+ buf = date_string(buf, end, tm, validate, raw);
+ if (have_t)
+ buf = time_string(buf, end, tm, validate, raw);
+
+ return buf;
+}
+
+static noinline_for_stack
char *clock(char *buf, char *end, struct clk *clk, struct printf_spec spec,
const char *fmt)
{
@@ -1550,6 +1671,7 @@ int kptr_restrict __read_mostly;
* - 'd[234]' For a dentry name (optionally 2-4 last components)
* - 'D[234]' Same as 'd' but for a struct file
* - 'g' For block_device name (gendisk + partition number)
+ * - 't[dt][rv]' For time and date as represented in struct rtc_time
* - 'C' For a clock, it prints the name (Common Clock Framework) or address
* (legacy clock framework) of the clock
* - 'Cn' For a clock, it prints the name (Common Clock Framework) or address
@@ -1702,6 +1824,8 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
return address_val(buf, end, ptr, fmt);
case 'd':
return dentry_name(buf, end, ptr, spec, fmt);
+ case 't':
+ return timeanddate(buf, end, (const struct rtc_time *)ptr, fmt);
case 'C':
return clock(buf, end, ptr, spec, fmt);
case 'D':
--
2.11.0
next prev parent reply other threads:[~2017-06-08 13:48 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-08 13:47 [PATCH v1 00/25] lib, rtc: Print rtc_time via %pt[dt][rv] Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 01/25] lib/vsprintf: Remove useless NULL checks Andy Shevchenko
2017-06-08 20:59 ` Rasmus Villemoes
2017-07-20 10:22 ` Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 02/25] lib/vsprintf: Make decspec global Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 03/25] lib/vsprintf: Make strspec global Andy Shevchenko
2017-06-08 13:47 ` Andy Shevchenko [this message]
2017-06-08 14:49 ` [PATCH v1 04/25] lib/vsprintf: Print time and date in human readable format via %pt Arnd Bergmann
2017-06-08 14:55 ` Andy Shevchenko
2017-06-08 15:05 ` Alexandre Belloni
2017-06-08 17:57 ` Andy Shevchenko
2017-06-08 18:41 ` Alexandre Belloni
2017-06-08 18:49 ` Andy Shevchenko
2017-06-08 20:42 ` Rasmus Villemoes
2017-06-08 21:25 ` Andy Shevchenko
2017-06-08 21:45 ` Arnd Bergmann
2017-07-20 10:30 ` Andy Shevchenko
2017-06-08 15:33 ` Arnd Bergmann
2017-06-08 15:48 ` Joe Perches
2017-06-08 18:02 ` Andy Shevchenko
2017-06-08 23:09 ` Joe Perches
2017-06-08 13:47 ` [PATCH v1 05/25] ds1302: Switch to use %pt Andy Shevchenko
2017-06-08 14:00 ` Greg Kroah-Hartman
2017-06-08 13:47 ` [PATCH v1 06/25] rtc: " Andy Shevchenko
2017-06-08 14:00 ` Greg Kroah-Hartman
2017-06-08 18:38 ` Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 07/25] rtc: at91rm9200: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 08/25] rtc: at91sam9: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 09/25] rtc: m41t80: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 10/25] rtc: m48t59: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 11/25] rtc: mcp795: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 12/25] rtc: pcf50633: " Andy Shevchenko
2017-06-08 13:47 ` [PATCH v1 13/25] rtc: pic32: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 14/25] rtc: pm8xxx: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 15/25] rtc: puv3: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 16/25] rtc: rk808: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 17/25] rtc: rx6110: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 18/25] rtc: rx8025: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 19/25] rtc: s3c: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 20/25] rtc: s5m: " Andy Shevchenko
2017-06-08 16:46 ` Krzysztof Kozlowski
2017-06-08 13:48 ` [PATCH v1 21/25] rtc: tegra: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 22/25] mk68/mac: " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 23/25] Input: hp_sdc_rtc - " Andy Shevchenko
2017-06-08 13:48 ` [PATCH v1 24/25] kdb: " Andy Shevchenko
2017-06-09 13:42 ` Daniel Thompson
2017-10-12 13:31 ` Arnd Bergmann
2017-10-12 17:05 ` Andy Shevchenko
2017-10-13 7:42 ` Arnd Bergmann
2017-06-08 13:48 ` [PATCH v1 25/25] PM: " Andy Shevchenko
2017-06-08 17:16 ` Rafael J. Wysocki
2017-06-08 14:52 ` [PATCH v1 00/25] lib, rtc: Print rtc_time via %pt[dt][rv] Joe Perches
2017-06-08 15:02 ` Andy Shevchenko
2017-06-09 5:08 ` Joe Perches
2017-07-18 17:50 ` Joe Perches
2017-07-18 17:55 ` Andy Shevchenko
2017-07-18 18:32 ` Joe Perches
2017-07-18 19:57 ` Mark Salyzyn
2017-07-20 10:33 ` Andy Shevchenko
2017-07-20 17:57 ` Mark Salyzyn
2017-07-21 4:07 ` Joe Perches
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