Provides feature detection describing the capabilities of platform. More...

Collaboration diagram for Platform Features:

LBAL_TYPE
These identify characteristics of certain POD types for a given compiler; preprocessor definitions are used since sizeof can’t be used by the preprocessor (reliably). These can be defined since we have special knowledge of the compile/build flags that wouldn’t necessarily be available to conforming portable code.
#define	LBAL_TYPE_HAS_INT64
#define	LBAL_TYPE_HAS_INT128
#define	LBAL_TYPE_EXACT_WIDTH_INTEGERS
#define	LBAL_TYPE_DOUBLE_GT_FLOAT
#define	LBAL_TYPE_LONG_DOUBLE_GT_DOUBLE
#define	LBAL_TYPE_WCHAR_T_IS_16_BITS

LBAL_FEATURE
Some compilers and platforms do things in a peculiar way that we may need to work around or otherwise deal with. Those features are noted here.
#define	LBAL_FEATURE_UTF16_FILE_SYSTEM
	File system requires UTF-16 encoding.

Detailed Description

Provides feature detection describing the capabilities of platform.

These are all simple availability flags, and will be set to 1 if a feature is available and 0 otherwise.

Mostly, the platform features are actually compiler features whose availability is intentionally dependent on the target platform.

Remarks: There are compiler features whose availability is dependent on the target platform, but not by design. These are documented under compiler feature detection.

Macro Definition Documentation

#define LBAL_FEATURE_UTF16_FILE_SYSTEM

File system requires UTF-16 encoding.

It is assumed that the file system uses UTF-8 encoding unless this feature conditional is set.

#define LBAL_TYPE_DOUBLE_GT_FLOAT

double is distinct from float

#define LBAL_TYPE_EXACT_WIDTH_INTEGERS

availability of C99 exact width int types

#define LBAL_TYPE_HAS_INT128

native 128-bit ints - including usigned ints - as __int128_t and __uint128_t

#define LBAL_TYPE_HAS_INT64

native 64-bit ints - including usigned ints - as int64_t and uint64_t (and possibly also long long and unsigned long long, depending)

#define LBAL_TYPE_LONG_DOUBLE_GT_DOUBLE

long double is distinct from double

#define LBAL_TYPE_WCHAR_T_IS_16_BITS

if this is 0, wchar_t is assumed to be a 32-bit integer type