libunic/char16size.c

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2022-05-31 15:27:46 +03:00
/* This software is licensed by the MIT License, see LICENSE file */
/* Copyright © 2022 Gregory Lirent */
#include "build.h"
int char16size(const char16_t* s) {
unsigned int v;
memcpy(&v, s, 4);
if (IS_LITTLE_ENDIAN) {
if ((v&0xfc00fc00) == 0xdc00d800) return 2;
if ((v&0x0000f800) != 0x0000d800) return 1;
} else {
if ((v&0xfc00fc00) == 0xd800dc00) return 2;
if ((v&0xf8000000) != 0xd8000000) return 1;
}
return 0;
}