48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
#ifndef COSMOPOLITAN_LIBC_STR_OLDUTF16_H_
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#define COSMOPOLITAN_LIBC_STR_OLDUTF16_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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unsigned getutf16(const char16_t *, wint_t *);
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int pututf16(char16_t *, size_t, wint_t, bool);
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#define pututf16(BUF, SIZE, CH, AWESOME) __pututf16(BUF, SIZE, CH, AWESOME)
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#define getutf16(BUF, CHPTR) __getutf16(BUF, CHPTR)
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forceinline int __pututf16(char16_t *s, size_t size, wint_t wc,
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bool32 awesome) {
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if (size >= 1 && (0x00 <= wc && wc <= 0xD7FF)) {
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if (wc >= 32 || !awesome) {
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s[0] = (char16_t)wc;
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return 1;
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} else if (size >= 2) {
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s[0] = 0xd800;
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s[1] = 0xdc00 | (char16_t)wc;
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return 2;
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}
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}
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int ax;
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asm("call\tpututf16"
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: "=a"(ax), "=m"(*(char(*)[size])s)
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: "D"(s), "S"(size), "d"(wc)
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: "cc");
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return ax;
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}
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forceinline unsigned __getutf16(const char16_t *s, wint_t *wc) {
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if ((0x00 <= s[0] && s[0] <= 0xD7FF)) {
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*wc = s[0];
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return 1;
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}
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unsigned ax;
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asm("call\tgetutf16"
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: "=a"(ax), "=m"(*wc)
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: "D"(s), "S"(wc), "m"(*s), "m"(*(char(*)[4])s)
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: "cc");
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return ax;
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}
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_STR_OLDUTF16_H_ */
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