ANNoy Cython

Type	Introduced	Exact Width Guaranteed	Signedness	ISO C Minimum Width	Typical Width (Modern)	Minimum (Formula)	Maximum (Formula)	Overflow Semantics | Portability Risk | Notes
char	C89	No	Implementation-defined	>=8 bits	8 bits	0 OR -2^(n-1)	2^n-1 OR 2^(n-1)-1	Signed: UB Unsigned: modulo	HIGH	Cannot assume signedness
signed char	C89	No	Signed	>=8 bits	8 bits	-2^(n-1)	2^(n-1)-1	UB on overflow	LOW	Distinct type from char
unsigned char	C89	No	Unsigned	>=8 bits	8 bits	0	2^n-1	Modulo 2^n	LOW	Only type guaranteed to hold raw byte data
short	C89	No	Signed	>=16 bits	16 bits	-2^(n-1)	2^(n-1)-1	UB on overflow	LOW	At least 16 bits
unsigned short	C89	No	Unsigned	>=16 bits	16 bits	0	2^n-1	Modulo 2^n	LOW
int	C89	No	Signed	>=16 bits	32 bits	-2^(n-1)	2^(n-1)-1	UB on overflow	MED	Most efficient native integer
unsigned int	C89	No	Unsigned	>=16 bits	32 bits	0	2^n-1	Modulo 2^n	LOW
long	C89	No	Signed	>=32 bits	32 or 64 bits	-2^(n-1)	2^(n-1)-1	UB on overflow	HIGH	32-bit (Windows), 64-bit (Linux/macOS)
unsigned long	C89	No	Unsigned	>=32 bits	32 or 64 bits	0	2^n-1	Modulo 2^n	HIGH	Platform dependent
long long	C99	No	Signed	>=64 bits	64 bits	-2^63	2^63-1	UB on overflow	LOW	At least 64 bits
unsigned long long	C99	No	Unsigned	>=64 bits	64 bits	0	2^64-1	Modulo 2^64	LOW
int8_t	C99	Yes (if exists)	Signed	Exactly 8 bits	8 bits	-2^7	2^7-1	UB on overflow	NONE	Requires exact-width support
uint8_t	C99	Yes (if exists)	Unsigned	Exactly 8 bits	8 bits	0	2^8-1	Modulo 2^8	NONE
int16_t	C99	Yes (if exists)	Signed	Exactly 16 bits	16 bits	-2^15	2^15-1	UB on overflow	NONE
uint16_t	C99	Yes (if exists)	Unsigned	Exactly 16 bits	16 bits	0	2^16-1	Modulo 2^16	NONE
int32_t	C99	Yes (if exists)	Signed	Exactly 32 bits	32 bits	-2^31	2^31-1	UB on overflow	NONE
uint32_t	C99	Yes (if exists)	Unsigned	Exactly 32 bits	32 bits	0	2^32-1	Modulo 2^32	NONE
int64_t	C99	Yes (if exists)	Signed	Exactly 64 bits	64 bits	-2^63	2^63-1	UB on overflow	NONE
uint64_t	C99	Yes (if exists)	Unsigned	Exactly 64 bits	64 bits	0	2^64-1	Modulo 2^64	NONE