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log: prepare to expand headers

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This commit is contained in:
Danny Robson 2019-10-10 15:10:41 +11:00
parent 8f7d4adef7
commit fa9f537e59
4 changed files with 212 additions and 153 deletions
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4
CMakeLists.txt
View File

@ -421,8 +421,10 @@ list (
library.hpp
list/node.hpp
list/sort.hpp
log.cpp
log.hpp
log/fwd.hpp
log/log.hpp
log/log.cpp
map/fixed.cpp
map/fixed.hpp
maths.cpp

141
log.hpp
View File

@ -1,145 +1,10 @@
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2012-2019 Danny Robson <danny@nerdcruft.net>
* Copyright 2019, Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "format.hpp"
#include <cruft/util/preprocessor.hpp>
#include <iosfwd>
#include <string>
// Windows.h or one of its friends defines a macro 'ERROR'. Screw Microsoft.
#ifdef ERROR
#undef ERROR
#endif
namespace cruft::log {
///////////////////////////////////////////////////////////////////////////
// rfc5424 log levels. It is assumed they are contiguous to simplify array
// indexing in logging code.
enum level_t {
EMERGENCY, /** system is unusable */
ALERT, /** action must be taken immediately */
CRITICAL, /** critical conditions */
ERROR, /** error conditions */
WARNING,
WARN = WARNING, /** warning conditions */
NOTICE, /** normal but significant condition */
INFORMATIONAL,
INFO = INFORMATIONAL, /** informational messages */
DEBUG /** debug-level messages */
};
#define MAP_LEVEL_T(F) MAP0(F, EMERGENCY, ALERT, CRITICAL, ERROR, WARN, NOTICE, INFO, DEBUG)
constexpr auto DEFAULT_LOG_LEVEL = NOTICE;
//-------------------------------------------------------------------------
const std::string& to_string (level_t);
//-------------------------------------------------------------------------
std::ostream&
operator<< (std::ostream&, level_t);
///////////////////////////////////////////////////////////////////////////
// Query or set the global logging level filter. If the severity passed to
// a logging call is less than this then the output is discarded.
//
// The initial logging level can be controlled by setting the environment
// variable LOG_LEVEL to a string corresponding to the names of the values
// in level_t.
//
// Otherwise we fall back to the hard coded default from above.
//
// As a special case, a blank value for the environment variable LOG_LEVEL
// corresponds to the maximum log level. It indicates a preference for
// minimum output, and may be changed to disable all output in future
// updates.
level_t log_level (void);
level_t log_level (level_t);
///////////////////////////////////////////////////////////////////////////
void write (level_t, const std::string &msg);
template <typename ...Args, size_t N>
void
write (level_t l, const char (&fmt)[N], Args &&...args)
{
write (
l,
to_string (
format::printf (fmt) (
std::forward<Args> (args)...
)
)
);
}
//-------------------------------------------------------------------------
// Various convenience macros for logging specific strings with a well
// known severity.
//
// LOG_DEBUG is treated similarly to assert; if NDEBUG is defined then we
// compile out the statement so as to gain a little runtime efficiency
// speed.
#define LOG_EMERGENCY(...) do { cruft::log::write (cruft::log::EMERGENCY, ##__VA_ARGS__); } while (0)
#define LOG_ALERT(...) do { cruft::log::write (cruft::log::ALERT, ##__VA_ARGS__); } while (0)
#define LOG_CRITICAL(...) do { cruft::log::write (cruft::log::CRITICAL, ##__VA_ARGS__); } while (0)
#define LOG_ERROR(...) do { cruft::log::write (cruft::log::ERROR, ##__VA_ARGS__); } while (0)
#define LOG_WARNING(...) do { cruft::log::write (cruft::log::WARNING, ##__VA_ARGS__); } while (0)
#define LOG_WARN(...) do { cruft::log::write (cruft::log::WARN, ##__VA_ARGS__); } while (0)
#define LOG_NOTICE(...) do { cruft::log::write (cruft::log::NOTICE, ##__VA_ARGS__); } while (0)
#define LOG_INFO(...) do { cruft::log::write (cruft::log::INFO, ##__VA_ARGS__); } while (0)
#if !defined(NDEBUG)
#define LOG_DEBUG(...) do { cruft::log::write (cruft::log::DEBUG, ##__VA_ARGS__); } while (0)
#else
#define LOG_DEBUG(...) do { ; } while (0)
#endif
///////////////////////////////////////////////////////////////////////////
class scoped_logger {
public:
scoped_logger (level_t, std::string);
~scoped_logger ();
scoped_logger (scoped_logger const&) = delete;
scoped_logger& operator= (scoped_logger const&) = delete;
scoped_logger (scoped_logger &&) = delete;
scoped_logger& operator= (scoped_logger &&) = delete;
protected:
const level_t m_level;
const std::string m_message;
};
///////////////////////////////////////////////////////////////////////////
class scoped_timer {
public:
scoped_timer (level_t, std::string);
~scoped_timer ();
scoped_timer (scoped_timer const&) = delete;
scoped_timer& operator= (scoped_timer const&) = delete;
scoped_timer (scoped_timer &&) = delete;
scoped_timer& operator= (scoped_timer &&) = delete;
private:
const level_t m_level;
const std::string m_message;
uint64_t m_start;
};
}
#include "log/log.hpp"

54
log.cpp → log/log.cpp
View File

@ -9,9 +9,10 @@
#include "log.hpp"
#include "term.hpp"
#include "time.hpp"
#include "cast.hpp"
#include "../term.hpp"
#include "../time.hpp"
#include "../cast.hpp"
#include "../string.hpp"
#include <cstring>
#include <ctime>
@ -40,13 +41,24 @@ ALL_LEVELS[] = {
///
/// conversion is case insensitive
/// throws std::range_error if unable to convert
static cruft::log::level_t
to_level (std::string name)
cruft::log::level_t
cruft::log::to_level (std::string_view name)
{
if (std::empty (name))
return cruft::log::EMERGENCY;
static const std::map<std::string, cruft::log::level_t> NAME_LEVELS = {
std::string upper (name.size (), char{});
std::transform (
name.cbegin (),
name.cend (),
upper.begin (),
::toupper
);
static constexpr struct {
char const *name;
cruft::log::level_t value;
} VALUES[] = {
{ "EMERGENCY", cruft::log::EMERGENCY },
{ "ALERT", cruft::log::ALERT },
{ "CRITICAL", cruft::log::CRITICAL },
@ -59,13 +71,11 @@ to_level (std::string name)
{ "DEBUG", cruft::log::DEBUG }
};
std::transform (name.cbegin (), name.cend (), name.begin (), ::toupper);
for (auto const [key, val]: VALUES)
if (!strcmp (upper.data (), key))
return val;
auto pos = NAME_LEVELS.find (name);
if (pos == NAME_LEVELS.end ())
throw std::range_error (name);
return pos->second;
throw std::invalid_argument (std::string (name));
}
@ -111,7 +121,7 @@ initial_log_level (void)
return cruft::log::DEFAULT_LOG_LEVEL;
try {
return to_level (env);
return cruft::log::to_level (env);
} catch (...) {
std::clog << "Invalid environment LOG_LEVEL: '" << env << "'\n";
return cruft::log::DEFAULT_LOG_LEVEL;
@ -160,7 +170,7 @@ needs_break (cruft::log::level_t level)
return false;
try {
break_level = to_level (env);
break_level = cruft::log::to_level (env);
return true;
} catch (...) {
return false;
@ -221,6 +231,22 @@ level_width (void)
///////////////////////////////////////////////////////////////////////////////
void
cruft::log::write (level_t level, const std::string &msg)
{
return write (level, std::string_view (msg));
}
//-----------------------------------------------------------------------------
void
cruft::log::write (level_t level, char const *msg)
{
return write (level, std::string_view (msg));
}
//-----------------------------------------------------------------------------
void
cruft::log::write (level_t level, std::string_view msg)
{
if (level <= log_level ()) {
static const size_t time_len = strlen("YYYY-mm-dd HHMMhSS") + 1;

166
log/log.hpp Normal file
View File

@ -0,0 +1,166 @@
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2012-2019 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "../format.hpp"
#include <cruft/util/preprocessor.hpp>
#include <iosfwd>
#include <string>
// Windows.h or one of its friends defines a macro 'ERROR'. Screw Microsoft.
#ifdef ERROR
#undef ERROR
#endif
namespace cruft::log {
///////////////////////////////////////////////////////////////////////////
// rfc5424 log levels. It is assumed they are contiguous to simplify array
// indexing in logging code.
enum level_t {
EMERGENCY, /** system is unusable */
ALERT, /** action must be taken immediately */
CRITICAL, /** critical conditions */
ERROR, /** error conditions */
WARNING,
WARN = WARNING, /** warning conditions */
NOTICE, /** normal but significant condition */
INFORMATIONAL,
INFO = INFORMATIONAL, /** informational messages */
DEBUG /** debug-level messages */
};
#define MAP_LEVEL_T(F) MAP0(F, EMERGENCY, ALERT, CRITICAL, ERROR, WARN, NOTICE, INFO, DEBUG)
constexpr auto DEFAULT_LOG_LEVEL = NOTICE;
//-------------------------------------------------------------------------
const std::string& to_string (level_t);
level_t to_level (std::string_view);
//-------------------------------------------------------------------------
std::ostream&
operator<< (std::ostream&, level_t);
///////////////////////////////////////////////////////////////////////////
// Query or set the global logging level filter. If the severity passed to
// a logging call is less than this then the output is discarded.
//
// The initial logging level can be controlled by setting the environment
// variable LOG_LEVEL to a string corresponding to the names of the values
// in level_t.
//
// Otherwise we fall back to the hard coded default from above.
//
// As a special case, a blank value for the environment variable LOG_LEVEL
// corresponds to the maximum log level. It indicates a preference for
// minimum output, and may be changed to disable all output in future
// updates.
level_t log_level (void);
level_t log_level (level_t);
///////////////////////////////////////////////////////////////////////////
void write (level_t, std::string const &msg);
void write (level_t, char const *msg);
void write (level_t, std::string_view msg);
//-------------------------------------------------------------------------
template <typename FormatT, typename ...ArgsT>
void
write (level_t l, FormatT fmt, ArgsT &&...args)
{
write (
l,
to_string (
format::printf (
std::forward<FormatT> (fmt),
std::forward<ArgsT> (args)...
)
)
);
}
//-------------------------------------------------------------------------
template <typename ...Args, size_t N>
void
write (level_t l, const char (&fmt)[N], Args &&...args)
{
write (
l,
to_string (
format::printf (fmt) (
std::forward<Args> (args)...
)
)
);
}
//-------------------------------------------------------------------------
// Various convenience macros for logging specific strings with a well
// known severity.
//
// LOG_DEBUG is treated similarly to assert; if NDEBUG is defined then we
// compile out the statement so as to gain a little runtime efficiency
// speed.
#define LOG_EMERGENCY(...) do { cruft::log::write (cruft::log::EMERGENCY, ##__VA_ARGS__); } while (0)
#define LOG_ALERT(...) do { cruft::log::write (cruft::log::ALERT, ##__VA_ARGS__); } while (0)
#define LOG_CRITICAL(...) do { cruft::log::write (cruft::log::CRITICAL, ##__VA_ARGS__); } while (0)
#define LOG_ERROR(...) do { cruft::log::write (cruft::log::ERROR, ##__VA_ARGS__); } while (0)
#define LOG_WARNING(...) do { cruft::log::write (cruft::log::WARNING, ##__VA_ARGS__); } while (0)
#define LOG_WARN(...) do { cruft::log::write (cruft::log::WARN, ##__VA_ARGS__); } while (0)
#define LOG_NOTICE(...) do { cruft::log::write (cruft::log::NOTICE, ##__VA_ARGS__); } while (0)
#define LOG_INFO(...) do { cruft::log::write (cruft::log::INFO, ##__VA_ARGS__); } while (0)
#if !defined(NDEBUG)
#define LOG_DEBUG(...) do { cruft::log::write (cruft::log::DEBUG, ##__VA_ARGS__); } while (0)
#else
#define LOG_DEBUG(...) do { ; } while (0)
#endif
///////////////////////////////////////////////////////////////////////////
class scoped_logger {
public:
scoped_logger (level_t, std::string);
~scoped_logger ();
scoped_logger (scoped_logger const&) = delete;
scoped_logger& operator= (scoped_logger const&) = delete;
scoped_logger (scoped_logger &&) = delete;
scoped_logger& operator= (scoped_logger &&) = delete;
protected:
const level_t m_level;
const std::string m_message;
};
///////////////////////////////////////////////////////////////////////////
class scoped_timer {
public:
scoped_timer (level_t, std::string);
~scoped_timer ();
scoped_timer (scoped_timer const&) = delete;
scoped_timer& operator= (scoped_timer const&) = delete;
scoped_timer (scoped_timer &&) = delete;
scoped_timer& operator= (scoped_timer &&) = delete;
private:
const level_t m_level;
const std::string m_message;
uint64_t m_start;
};
}