From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Herve Codina <herve.codina@bootlin.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Jonathan Cameron <jic23@kernel.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v4 07/13] minmax: Introduce {min,max}_array()
Date: Thu, 15 Jun 2023 16:51:32 +0300 [thread overview]
Message-ID: <CAHp75Vf2aR1x-Nf2+uUySyGH-p12YbP2Z=Ezbspqg==pCpRbOg@mail.gmail.com> (raw)
In-Reply-To: <20230615113512.07967677@bootlin.com>
On Thu, Jun 15, 2023 at 12:35 PM Herve Codina <herve.codina@bootlin.com> wrote:
> On Thu, 15 Jun 2023 01:05:40 +0300
> Andy Shevchenko <andy.shevchenko@gmail.com> wrote:
...
> Did the job using _Generic().
Cool! Keep my tag for that version and thank you for pursuing the
implementation that works for everybody.
> This lead to:
> --- 8< ---
> /*
> * Remove a const qualifier
...from integer types
> * _Generic(foo, type-name: association, ..., default: association) performs a
> * comparison against the foo type (not the qualified type).
> * Do not use the const keyword in the type-name as it will not match the
> * unqualified type of foo.
> */
> #define __unconst_type_cases(type) \
__unconst_integer_type_cases() ?
> unsigned type: (unsigned type)0, \
> signed type: (signed type)0
>
>
Single blank line is enough.
> #define __unconst_typeof(x) typeof( \
__unconst_integer_typeof() ?
> _Generic((x), \
> char: (char)0, \
> __unconst_type_cases(char), \
> __unconst_type_cases(short), \
> __unconst_type_cases(int), \
> __unconst_type_cases(long), \
> __unconst_type_cases(long long), \
> default: (x)))
>
> /*
> * Do not check the array parameter using __must_be_array().
> * In the following legit use-case where the "array" passed is a simple pointer,
> * __must_be_array() will return a failure.
> * --- 8< ---
> * int *buff
> * ...
> * min = min_array(buff, nb_items);
> * --- 8< ---
> *
> * The first typeof(&(array)[0]) is needed in order to support arrays of both
> * 'int *buff' and 'int buf[N]' types.
> *
> * The array can be an array of const items.
> * typeof() keeps the const qualifier. Use __unconst_typeof() in order to
> * discard the const qualifier for the __element variable.
> */
> #define __minmax_array(op, array, len) ({ \
> typeof(&(array)[0]) __array = (array); \
> typeof(len) __len = (len); \
> __unconst_typeof(__array[0]) __element = __array[--__len]; \
> while (__len--) \
> __element = op(__element, __array[__len]); \
> __element; })
>
> /**
> * min_array - return minimum of values present in an array
> * @array: array
> * @len: array length
> *
> * Note that @len must not be zero (empty array).
> */
> #define min_array(array, len) __minmax_array(min, array, len)
>
> /**
> * max_array - return maximum of values present in an array
> * @array: array
> * @len: array length
> *
> * Note that @len must not be zero (empty array).
> */
> #define max_array(array, len) __minmax_array(max, array, len)
> --- 8< ---
>
> Do you think it looks good ?
Yes!
> For, the KUnit tests, I agree, it would be nice to have something.
> I need some more substantial work to implement and run the test in KUnit
> and the first task will be learning the KUnit test system.
> I will do that but out of this series.
Thank you, it's fine with me.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-06-15 13:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 7:48 [PATCH v4 00/13] Add support for IIO devices in ASoC Herve Codina
2023-06-14 7:48 ` [PATCH v4 01/13] ASoC: dt-bindings: Add audio-iio-aux Herve Codina
2023-06-14 7:48 ` [PATCH v4 02/13] ASoC: dt-bindings: simple-card: Add additional-devs subnode Herve Codina
2023-06-14 7:48 ` [PATCH v4 03/13] iio: inkern: Check error explicitly in iio_channel_read_max() Herve Codina
2023-06-14 7:48 ` [PATCH v4 04/13] iio: consumer.h: Fix raw values documentation notes Herve Codina
2023-06-14 7:48 ` [PATCH v4 05/13] iio: inkern: Remove the 'unused' variable usage in iio_channel_read_max() Herve Codina
2023-06-14 7:48 ` [PATCH v4 06/13] iio: inkern: Fix headers inclusion order Herve Codina
2023-06-14 8:58 ` Andy Shevchenko
2023-06-14 7:48 ` [PATCH v4 07/13] minmax: Introduce {min,max}_array() Herve Codina
2023-06-14 9:02 ` Andy Shevchenko
2023-06-14 9:42 ` Herve Codina
2023-06-14 11:51 ` Andy Shevchenko
2023-06-14 20:34 ` Herve Codina
2023-06-14 22:05 ` Andy Shevchenko
2023-06-15 9:35 ` Herve Codina
2023-06-15 13:51 ` Andy Shevchenko [this message]
2023-06-16 9:08 ` David Laight
2023-06-16 11:48 ` Herve Codina
2023-06-16 12:42 ` David Laight
2023-06-14 7:48 ` [PATCH v4 08/13] iio: inkern: Use max_array() to get the maximum value from an array Herve Codina
2023-06-14 9:03 ` Andy Shevchenko
2023-06-14 7:49 ` [PATCH v4 09/13] iio: inkern: Replace a FIXME comment by a TODO one Herve Codina
2023-06-14 7:49 ` [PATCH v4 10/13] iio: inkern: Add a helper to query an available minimum raw value Herve Codina
2023-06-14 7:49 ` [PATCH v4 11/13] ASoC: soc-dapm.h: Convert macros to return a compound literal Herve Codina
2023-06-14 7:49 ` [PATCH v4 12/13] ASoC: codecs: Add support for the generic IIO auxiliary devices Herve Codina
2023-06-14 7:49 ` [PATCH v4 13/13] ASoC: simple-card: Handle additional devices Herve Codina
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