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11ec99931b
These are standard functions that are needed to help support the Skull language. Note that normally this codebase uses libc/str/thompike.h See #105
60 lines
3.5 KiB
C
60 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/limits.h"
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#include "libc/str/mb.internal.h"
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#include "libc/str/str.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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size_t mbrtoc16(char16_t *pc16, const char *s, size_t n, mbstate_t *ps) {
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static unsigned internal_state;
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if (!ps) ps = (void *)&internal_state;
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unsigned *pending = (unsigned *)ps;
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if (!s) return mbrtoc16(0, "", 1, ps);
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/* mbrtowc states for partial UTF-8 characters have the high bit set;
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* we use nonzero states without high bit for pending surrogates. */
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if ((int)*pending > 0) {
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if (pc16) *pc16 = *pending;
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*pending = 0;
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return -3;
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}
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wchar_t wc;
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size_t ret = mbrtowc(&wc, s, n, ps);
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if (ret <= 4) {
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if (wc >= 0x10000) {
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*pending = (wc & 0x3ff) + 0xdc00;
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wc = 0xd7c0 + (wc >> 10);
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}
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if (pc16) *pc16 = wc;
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}
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return ret;
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}
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