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3 Elementary types <unitypes.h>

The include file <unitypes.h> provides the following basic types.

Type: uint8_t
Type: uint16_t
Type: uint32_t

These are the storage units of UTF-8/16/32 strings, respectively. The definitions are taken from <stdint.h>, on platforms where this include file is present.

Type: ucs4_t

This type represents a single Unicode character, outside of an UTF-32 string.

The types ucs4_t and uint32_t happen to be identical. They differ in use and intent, however: