49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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/* ISO C1x Unicode utilities
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* Based on ISO/IEC SC22/WG14 9899 TR 19769 (SC22 N1326)
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*
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* THIS SOFTWARE IS NOT COPYRIGHTED
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*
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* This source code is offered for use in the public domain. You may
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* use, modify or distribute it freely.
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*
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* This code is distributed in the hope that it will be useful but
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* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
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* DISCLAIMED. This includes but is not limited to warranties of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Date: 2011-09-27
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*/
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#include <errno.h>
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#include <uchar.h>
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size_t mbrtoc32 (char32_t *__restrict__ pc32,
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const char *__restrict__ s,
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size_t n,
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mbstate_t *__restrict__ __UNUSED_PARAM(ps))
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{
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if (*s == 0)
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{
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*pc32 = 0;
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return 0;
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}
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/* ASCII character - high bit unset */
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if ((*s & 0x80) == 0)
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{
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*pc32 = *s;
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return 1;
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}
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/* Multibyte chars */
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if ((*s & 0xE0) == 0xC0) /* 110xxxxx needs 2 bytes */
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{
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if (n < 2)
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return (size_t)-2;
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*pc32 = ((s[0] & 31) << 6) | (s[1] & 63);
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return 2;
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}
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else if ((*s & 0xf0) == 0xE0) /* 1110xxxx needs 3 bytes */
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{
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if (n < 3)
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return (size_t)-2;
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*pc32 = ((s[0] & 15) << 12) | ((s[1] & 63) << 6) | (s[2] & 63);
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return 3;
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}
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else if ((*s & 0xF8) == 0xF0) /* 11110xxx needs 4 bytes */
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{
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if (n < 4)
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return (size_t)-2;
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*pc32 = ((s[0] & 7) << 18) | ((s[1] & 63) << 12) | ((s[2] & 63) << 6) | (s[4] & 63);
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return 4;
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}
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errno = EILSEQ;
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return (size_t)-1;
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}
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