77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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/***
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*wchtodig.c - Contains _wchartodigit function
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*
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* Copyright (c) 1989-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* _wchartodigit - convert wchar_t character to digit
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*
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*Revision History:
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* 08-01-00 GB Module Created
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*
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*******************************************************************************/
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#include <wchar.h>
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/***
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*_wchartodigit(wchar_t) converts unicode character to it's corrosponding digit
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*
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*Purpose:
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* Convert unicode character to it's corrosponding digit
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*
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*Entry:
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* ch char to convert
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*
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*Exit:
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* good result: int 0-9
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*
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* bad result: -1
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*
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*Exceptions:
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*
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*******************************************************************************/
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int _wchartodigit(wchar_t ch)
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{
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#define DIGIT_RANGE_TEST(zero) \
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if (ch < zero) \
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return -1; \
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if (ch < zero + 10) \
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{ \
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return ch - zero; \
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}
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DIGIT_RANGE_TEST(0x0030) // 0030;DIGIT ZERO
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if (ch < 0xFF10) // FF10;FULLWIDTH DIGIT ZERO
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{
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DIGIT_RANGE_TEST(0x0660) // 0660;ARABIC-INDIC DIGIT ZERO
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DIGIT_RANGE_TEST(0x06F0) // 06F0;EXTENDED ARABIC-INDIC DIGIT ZERO
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DIGIT_RANGE_TEST(0x0966) // 0966;DEVANAGARI DIGIT ZERO
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DIGIT_RANGE_TEST(0x09E6) // 09E6;BENGALI DIGIT ZERO
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DIGIT_RANGE_TEST(0x0A66) // 0A66;GURMUKHI DIGIT ZERO
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DIGIT_RANGE_TEST(0x0AE6) // 0AE6;GUJARATI DIGIT ZERO
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DIGIT_RANGE_TEST(0x0B66) // 0B66;ORIYA DIGIT ZERO
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DIGIT_RANGE_TEST(0x0C66) // 0C66;TELUGU DIGIT ZERO
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DIGIT_RANGE_TEST(0x0CE6) // 0CE6;KANNADA DIGIT ZERO
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DIGIT_RANGE_TEST(0x0D66) // 0D66;MALAYALAM DIGIT ZERO
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DIGIT_RANGE_TEST(0x0E50) // 0E50;THAI DIGIT ZERO
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DIGIT_RANGE_TEST(0x0ED0) // 0ED0;LAO DIGIT ZERO
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DIGIT_RANGE_TEST(0x0F20) // 0F20;TIBETAN DIGIT ZERO
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DIGIT_RANGE_TEST(0x1040) // 1040;MYANMAR DIGIT ZERO
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DIGIT_RANGE_TEST(0x17E0) // 17E0;KHMER DIGIT ZERO
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DIGIT_RANGE_TEST(0x1810) // 1810;MONGOLIAN DIGIT ZERO
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return -1;
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}
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#undef DIGIT_RANGE_TEST
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// FF10;FULLWIDTH DIGIT ZERO
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if (ch < 0xFF10 + 10)
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{
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return ch - 0xFF10;
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}
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return -1;
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}
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