From MSX Game Library

You can use standard C types to define variables but MSXgl provide some shortcut that help to write short code and makes data size and sign explicit (which is so important for creating efficient code on a Z80).

MSXgl's types can be found in core.h.

Type Desc. SDCC equivalent Min value Max value
bool Boolean (8 bits) unsigned char 0 not 0
i8 8 bits signed integer signed char -128 127
u8 8 bits unsigned integer unsigned char 0 255
i16 16 bits signed integer signed short -32768 32767
u16 16 bits unsigned integer unsigned short 0 65535
i32 32 bits signed integer signed long -2,147,483,648 2,147,483,647
u32 32 bits unsigned integer unsigned long 0 4,294,967,295
i64 64 bits signed integer signed long long -9,223,372,036,854,775,808 9,223,372,036,854,775,807
u64 64 bits unsigned integer unsigned long long 0 18,446,744,073,709,551,615
f32 32 bits float (IEEE 754) float 1,175494351e-38 3,402823466e+38
c8 8 bits character (ASCII, UTF-8) unsigned char 0 255
c16 16 bits character (UTF-16, JIS, etc.) unsigned short 0 65535
ptr Pointer void* 0x0000 0xFFFF
callback Callback default signature void (*)(void)

Related constants:

#define NULL	0	// Pointer "NULL" value
#define TRUE	1	// Value for "TRUE" boolean
#define FALSE	0	// Value for "FALSE" boolean

See also: