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lib/alsa/Version: wrapper for snd_asoundlib_version()

This commit is contained in:
Max Kellermann 2017-03-29 20:29:02 +02:00
parent dae8b78569
commit b4e4bdcda9
3 changed files with 95 additions and 0 deletions
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1
Makefile.am
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@ -257,6 +257,7 @@ UPNP_SOURCES = \
src/lib/upnp/Action.hxx
ALSA_SOURCES = \
src/lib/alsa/Version.cxx src/lib/alsa/Version.hxx \
src/lib/alsa/NonBlock.cxx src/lib/alsa/NonBlock.hxx
#

52
src/lib/alsa/Version.cxx Normal file
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@ -0,0 +1,52 @@
/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Version.hxx"
#include <alsa/asoundlib.h>
gcc_pure
static uint_least32_t
ParseAlsaVersion(const char *p)
{
char *endptr;
unsigned long major, minor = 0, subminor = 0;
major = strtoul(p, &endptr, 10);
if (*endptr == '.') {
p = endptr + 1;
minor = strtoul(p, &endptr, 10);
if (*endptr == '.') {
p = endptr + 1;
subminor = strtoul(p, nullptr, 10);
}
}
return MakeAlsaVersion(major, minor, subminor);
}
uint_least32_t
GetRuntimeAlsaVersion()
{
const char *version = snd_asoundlib_version();
if (version == nullptr)
return 0;
return ParseAlsaVersion(version);
}

42
src/lib/alsa/Version.hxx Normal file
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@ -0,0 +1,42 @@
/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_ALSA_VERSION_HXX
#define MPD_ALSA_VERSION_HXX
#include "Compiler.h"
#include <stdint.h>
static constexpr uint_least32_t
MakeAlsaVersion(uint_least32_t major, uint_least32_t minor,
uint_least32_t subminor)
{
return (major << 16) | (minor << 8) | subminor;
}
/**
* Wrapper for snd_asoundlib_version() which translates the resulting
* string to an integer constructed with MakeAlsaVersion().
*/
gcc_const
uint_least32_t
GetRuntimeAlsaVersion();
#endif