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78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/sdk/crt/mbstring/mbbtype.c
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* PURPOSE: Determines the type of a multibyte character
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* PROGRAMERS:
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* Copyright 1999 Ariadne
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* Copyright 1999 Alexandre Julliard
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* Copyright 2000 Jon Griffths
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*
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*/
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#include <precomp.h>
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#include <mbstring.h>
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#include <mbctype.h>
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/*
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* @implemented
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*/
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int _mbbtype(unsigned char c , int type)
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{
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if ( type == 1 ) {
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if ((c >= 0x40 && c <= 0x7e ) || (c >= 0x80 && c <= 0xfc ) )
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{
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return _MBC_TRAIL;
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}
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else if (( c >= 0x20 && c <= 0x7E ) || ( c >= 0xA1 && c <= 0xDF ) ||
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( c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC ) )
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return _MBC_ILLEGAL;
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else
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return 0;
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} else {
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if (( c >= 0x20 && c <= 0x7E ) || ( c >= 0xA1 && c <= 0xDF )) {
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return _MBC_SINGLE;
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}
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else if ( (c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC) )
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return _MBC_LEAD;
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else if (( c >= 0x20 && c <= 0x7E ) || ( c >= 0xA1 && c <= 0xDF ) ||
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( c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC ) )
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return _MBC_ILLEGAL;
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else
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return 0;
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}
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return 0;
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}
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/*
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* @implemented
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*/
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int _mbsbtype( const unsigned char *str, size_t n )
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{
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int lead = 0;
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const unsigned char *end = str + n;
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/* Lead bytes can also be trail bytes so we need to analyse the string.
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* Also we must return _MBC_ILLEGAL for chars past the end of the string
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*/
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while (str < end) /* Note: we skip the last byte - will check after the loop */
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{
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if (!*str)
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return _MBC_ILLEGAL;
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lead = !lead && _ismbblead(*str);
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str++;
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}
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if (lead)
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if (_ismbbtrail(*str))
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return _MBC_TRAIL;
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else
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return _MBC_ILLEGAL;
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else
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if (_ismbblead(*str))
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return _MBC_LEAD;
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else
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return _MBC_SINGLE;
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}
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