common.hpp File Reference

#include <cstddef>
#include <cstdlib>
#include <cstdio>
#include <cstdint>
#include <cinttypes>
#include <cstdarg>
#include <climits>
#include <cmath>
#include <cstring>
#include <cassert>
#include <string>
#include <stdexcept>
#include <logger.hpp>

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Classes
struct	rack::DeferWrapper< F >
	Defers running code until the scope is destructed. More...
struct	rack::Exception
	An exception explicitly thrown by Rack or a Rack plugin. More...

Namespaces
namespace	rack
	Root namespace for the Rack API.

Macros
#define	DEPRECATED   __attribute__((deprecated))
	Attribute for deprecated functions and symbols.
#define	PRIVATE
	Attribute for private functions not intended to be called by plugins.
#define	CONCAT_LITERAL(x, y)   x ## y
	Concatenates two literals or two macros Example:
#define	CONCAT(x, y)   CONCAT_LITERAL(x, y)
#define	TOSTRING_LITERAL(x)   #x
	Surrounds raw text with quotes Example:
#define	TOSTRING(x)   TOSTRING_LITERAL(x)
#define	LENGTHOF(arr)   (sizeof(arr) / sizeof((arr)[0]))
	Produces the length of a static array in number of elements.
#define	ENUMS(name, count)   name, name ## _LAST = name + (count) - 1
	Reserve space for count enums starting with name.
#define	BINARY(sym)   extern char _binary_##sym##_start, _binary_##sym##_end, _binary_##sym##_size
	References binary files compiled into the program.
#define	BINARY_START(sym)   ((const void*) &_binary_##sym##_start)
#define	BINARY_END(sym)   ((const void*) &_binary_##sym##_end)
#define	BINARY_SIZE(sym)   ((size_t) (&_binary_##sym##_end - &_binary_##sym##_start))
#define	DEFER(code)   auto CONCAT(_defer_, __COUNTER__) = rack::deferWrapper([&]() code)

Functions
int8_t	operator""_i8 (unsigned long long x)
	Helpful user-defined literals for specifying exact integer and float types.
int16_t	operator""_i16 (unsigned long long x)
int32_t	operator""_i32 (unsigned long long x)
int64_t	operator""_i64 (unsigned long long x)
uint8_t	operator""_u8 (unsigned long long x)
uint16_t	operator""_u16 (unsigned long long x)
uint32_t	operator""_u32 (unsigned long long x)
uint64_t	operator""_u64 (unsigned long long x)
float	operator""_f32 (long double x)
float	operator""_f32 (unsigned long long x)
double	operator""_f64 (long double x)
double	operator""_f64 (unsigned long long x)
template<typename To , typename From >
To	rack::bitCast (From from)
	Casts a primitive, preserving its bits instead of converting.
template<typename T >
T *	rack::construct ()
	C#-style property constructor Example:
template<typename T , typename F , typename V , typename... Args>
T *	rack::construct (F f, V v, Args... args)
template<typename F >
DeferWrapper< F >	rack::deferWrapper (F f)
template<typename C >
const C::mapped_type &	rack::get (const C &c, const typename C::key_type &key, const typename C::mapped_type &def=typename C::mapped_type())
	Given a std::map c, returns the value of the given key, or returns def if the key doesn't exist.
template<typename C >
const C::value_type &	rack::get (const C &c, typename C::size_type i, const typename C::value_type &def=typename C::value_type())
	Given a std::vector c, returns the value of the given index i, or returns def if the index is out of bounds.

Variables
const std::string	rack::APP_NAME
const std::string	rack::APP_EDITION
const std::string	rack::APP_EDITION_NAME
const std::string	rack::APP_VERSION_MAJOR
const std::string	rack::APP_VERSION
const std::string	rack::APP_OS
const std::string	rack::APP_OS_NAME
const std::string	rack::APP_CPU
const std::string	rack::APP_CPU_NAME
const std::string	rack::API_URL

Macro Definition Documentation

DEPRECATED

#define DEPRECATED   __attribute__((deprecated))

Attribute for deprecated functions and symbols.

E.g.

DEPRECATED void foo();

PRIVATE

#define PRIVATE

Attribute for private functions not intended to be called by plugins.

When #including rack.hpp, attempting to call PRIVATE functions will result in a compile-time error.

CONCAT_LITERAL

#define CONCAT_LITERAL	(		x,
			y )   x ## y

Concatenates two literals or two macros Example:

#define COUNT 42
CONCAT(myVariable, COUNT)

expands to

myVariable42

CONCAT

#define CONCAT	(		x,
			y )   CONCAT_LITERAL(x, y)

TOSTRING_LITERAL

#define TOSTRING_LITERAL

(

x

)

#x

Surrounds raw text with quotes Example:

#define NAME "world"
printf("Hello " TOSTRING(NAME))

expands to

printf("Hello " "world")

and of course the C++ lexer/parser then concatenates the string literals.

TOSTRING

#define TOSTRING

(

x

)

TOSTRING_LITERAL(x)

LENGTHOF

#define LENGTHOF

(

arr

)

(sizeof(arr) / sizeof((arr)[0]))

Produces the length of a static array in number of elements.

ENUMS

#define ENUMS	(		name,
			count )   name, name ## _LAST = name + (count) - 1

Reserve space for count enums starting with name.

Example:

enum Foo {
    ENUMS(BAR, 14),
    BAZ
};

BAR + 0 to BAR + 13 is reserved. BAZ has a value of 14.

BINARY

#define BINARY

(

sym

)

extern char _binary_##sym##_start, _binary_##sym##_end, _binary_##sym##_size

References binary files compiled into the program.

For example, to include a file "Test.dat" directly into your program binary, add

BINARIES += Test.dat

to your Makefile and declare

BINARY(Test_dat);

at the root of a .c or .cpp source file. Note that special characters are replaced with "_". Then use

BINARY_START(Test_dat)
BINARY_END(Test_dat)

to reference the data beginning and end as a void* array, and

BINARY_SIZE(Test_dat)

to get its size in bytes.

BINARY_START

#define BINARY_START

(

sym

)

((const void*) &_binary_##sym##_start)

BINARY_END

#define BINARY_END

(

sym

)

((const void*) &_binary_##sym##_end)

BINARY_SIZE

#define BINARY_SIZE

(

sym

)

((size_t) (&_binary_##sym##_end - &_binary_##sym##_start))

DEFER

#define DEFER

(

code

)

auto CONCAT(_defer_, __COUNTER__) = rack::deferWrapper([&]() code)

Function Documentation

operator""_i8()

int8_t operator""_i8 ( unsigned long long x )

inline

Helpful user-defined literals for specifying exact integer and float types.

Usage examples: 42_i8 -4242_u16 0x4a2b_i32 0b11010111000000_u64 42_f32 4.2e-4_f64

operator""_i16()

int16_t operator""_i16 ( unsigned long long x )

inline

operator""_i32()

int32_t operator""_i32 ( unsigned long long x )

inline

operator""_i64()

int64_t operator""_i64 ( unsigned long long x )

inline

operator""_u8()

uint8_t operator""_u8 ( unsigned long long x )

inline

operator""_u16()

uint16_t operator""_u16 ( unsigned long long x )

inline

operator""_u32()

uint32_t operator""_u32 ( unsigned long long x )

inline

operator""_u64()

uint64_t operator""_u64 ( unsigned long long x )

inline

operator""_f32() [1/2]

float operator""_f32 ( long double x )

inline

operator""_f32() [2/2]

float operator""_f32 ( unsigned long long x )

inline

operator""_f64() [1/2]

double operator""_f64 ( long double x )

inline

operator""_f64() [2/2]

double operator""_f64 ( unsigned long long x )

inline