112 lines
2.1 KiB
C
112 lines
2.1 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_POSIX_WCHAR_H
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#define GRUB_POSIX_WCHAR_H 1
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#include <grub/charset.h>
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/* UCS-4. */
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typedef grub_int32_t wint_t;
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enum
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{
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WEOF = -1
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};
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/* UCS-4. */
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typedef grub_int32_t wchar_t;
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typedef struct mbstate {
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grub_uint32_t code;
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int count;
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} mbstate_t;
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/* UTF-8. */
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#define MB_CUR_MAX 4
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#define MB_LEN_MAX 4
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static inline size_t
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mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
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{
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const char *ptr;
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if (!s)
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{
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pwc = 0;
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s = "";
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n = 1;
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}
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for (ptr = s; ptr < s + n; ptr++)
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{
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if (!grub_utf8_process (*ptr, &ps->code, &ps->count))
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return -1;
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if (ps->count)
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continue;
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if (pwc)
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*pwc = ps->code;
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if (ps->code == 0)
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return 0;
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return ptr - s + 1;
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}
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return -2;
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}
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static inline int
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mbsinit(const mbstate_t *ps)
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{
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return ps->count == 0;
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}
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static inline size_t
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wcrtomb (char *s, wchar_t wc, mbstate_t *ps __attribute__ ((unused)))
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{
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if (s == 0)
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return 1;
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return grub_encode_utf8_character ((grub_uint8_t *) s,
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(grub_uint8_t *) s + MB_LEN_MAX,
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wc);
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}
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static inline wint_t btowc (int c)
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{
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if (c & ~0x7f)
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return WEOF;
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return c;
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}
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static inline int
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wcscoll (const wchar_t *s1, const wchar_t *s2)
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{
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while (*s1 && *s2)
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{
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if (*s1 != *s2)
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break;
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s1++;
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s2++;
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}
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if (*s1 < *s2)
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return -1;
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if (*s1 > *s2)
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return +1;
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return 0;
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}
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#endif
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