27 lines
1.1 KiB
C
27 lines
1.1 KiB
C
#ifndef COSMOPOLITAN_LIBC_STR_UTF16_H_
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#define COSMOPOLITAN_LIBC_STR_UTF16_H_
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#define UTF16_MASK 0xfc00
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#define UTF16_MOAR 0xd800 /* 0xD800..0xDBFF */
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#define UTF16_CONT 0xdc00 /* 0xDC00..0xDBFF */
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#define IsUcs2(wc) (((wc)&UTF16_MASK) != UTF16_MOAR)
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#define IsUtf16Cont(wc) (((wc)&UTF16_MASK) == UTF16_CONT)
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#define MergeUtf16(lo, hi) ((((lo)-0xD800) << 10) + ((hi)-0xDC00) + 0x10000)
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#define EncodeUtf16(wc) \
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(__builtin_expect(((0x0000 <= (wc) && (wc) <= 0xFFFF) || \
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(0xE000 <= (wc) && (wc) <= 0xFFFF)), \
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1) \
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? (wc) \
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: 0x10000 <= (wc) && (wc) <= 0x10FFFF \
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? (((((wc)-0x10000) >> 10) + 0xD800) | \
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((((wc)-0x10000) & 1023) + 0xDC00) << 16) \
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: 0xFFFD)
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_STR_UTF16_H_ */
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