300 lines
8.3 KiB
C
300 lines
8.3 KiB
C
//
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// File Name: euc2sjis.c
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// Owner: Tetsuhide Akaishi
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// Revision: 1.00 02/21/'93 Tetsuhide Akaishi
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//
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#include "win32.h"
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#include "fechrcnv.h"
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#ifdef DBCS_DIVIDE
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extern DBCS_STATUS dStatus0;
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extern DBCS_STATUS dStatus;
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#endif
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//@
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//
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// Syntax:
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int EUCChar_to_ShiftJISChar ( UCHAR *pEUC, UCHAR *pShiftJIS )
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// The EUCChar_to_ShiftJISChar function convert one character string
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// as EUC code to a Shift JIS code string.
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//
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// UCHAR *pEUC Points to the character string to be converted.
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//
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// UCHAR *pShiftJIS Points to a buffer that receives the convert string
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// from EUC Code to Shift JIS.
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//
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// Return Value
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// The return value is the
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// number of Shift JIS characters written to the buffer pointed to by pSJIS.
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//
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{
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if ( *pEUC >= 0x0a1 && *pEUC <= 0x0de ) {
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if ( (*pEUC)%2 == 1 ) { // odd
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*pShiftJIS = ((*pEUC)-0x0a1)/2+0x081;
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goto ODD_SECOND_BYTE;
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}
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else { // even
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*pShiftJIS = ((*pEUC)-0x0a2)/2+0x081;
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goto EVEN_SECOND_BYTE;
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}
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}
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if ( *pEUC >= 0x0df && *pEUC <= 0x0fe ) {
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if ( (*pEUC)%2 == 1 ) { // odd
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*pShiftJIS = ((*pEUC)-0x0df)/2+0x0e0;
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goto ODD_SECOND_BYTE;
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}
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else { // even
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*pShiftJIS = ((*pEUC)-0x0e0)/2+0x0e0;
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goto EVEN_SECOND_BYTE;
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}
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}
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// Is the charcter Hankaku KATAKANA ?
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if ( *pEUC == 0x08e ) {
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*pShiftJIS = *(pEUC+1);
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return( 1 );
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}
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// Is the charcter ASCII charcter ?
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*pShiftJIS = *pEUC;
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return ( 1 );
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ODD_SECOND_BYTE:
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if ( *(pEUC+1) >= 0x0a1 && *(pEUC+1) <= 0x0df ) {
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*(pShiftJIS+1) = *(pEUC+1) - 0x061;
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}
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else {
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*(pShiftJIS+1) = *(pEUC+1) - 0x060;
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}
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return ( 2 );
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EVEN_SECOND_BYTE:
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*(pShiftJIS+1) = *(pEUC+1)-2;
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return ( 2 );
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}
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int EUC_to_ShiftJIS ( UCHAR *pEUC, int EUC_len, UCHAR *pSJIS, int SJIS_len )
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// The EUC_to_ShiftJIS function convert a character string as EUC code
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// to a Shift JIS code string.
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//
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// UCHAR *pEUC Points to the character string to be converted.
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//
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// int EUC_len Specifies the size in bytes of the string pointed
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// to by the pEUC parameter. If this value is -1,
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// the string is assumed to be NULL terminated and the
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// length is calculated automatically.
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//
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// UCHAR *pSJIS Points to a buffer that receives the convert string
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// from EUC Code to Shift JIS.
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//
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// int SJIS_len Specifies the size, in Shift JIS characters of the
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// buffer pointed to by the pSJIS parameter.
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// If the value is zero,
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// the function returns the number of Shift JIS characters
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// required for the buffer, and makes no use of the pSJIS
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// buffer.
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//
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// Return Value
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// If the function succeeds, and SJIS_len is nonzero, the return value is the
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// number of Shift JIS characters written to the buffer pointed to by pSJIS.
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//
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// If the function succeeds, and SJIS_len is zero, the return value is the
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// required size, in Shift JIS characters, for a buffer that can receive the
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// converted string.
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//
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// If the function fails, the return value is -1. The error mean pSJIS buffer
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// is small for setting converted strings.
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//
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{
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int re; // Convert Lenght
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int i; // Loop Counter
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if ( EUC_len == -1 ) {
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// If length is not set, last character of the strings is NULL.
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EUC_len = strlen ( pEUC ) + 1;
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}
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i = 0;
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re = 0;
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if ( SJIS_len == 0 ) {
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// Only retrun the required size
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#ifdef DBCS_DIVIDE
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if ( dStatus0.nCodeSet == CODE_JPN_EUC ){
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pEUC++;
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i++;
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// Is the charcter Hankaku KATAKANA ?
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if ( dStatus0.cSavedByte == 0x08e )
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re++;
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else // The character is Kanji.
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re+=2;
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dStatus0.nCodeSet = CODE_UNKNOWN;
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dStatus0.cSavedByte = '\0';
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}
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#endif
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while ( i < EUC_len ) {
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#ifdef DBCS_DIVIDE
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if( ( i == EUC_len - 1 ) &&
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( *pEUC >= 0x0a1 && *pEUC <= 0x0fe || *pEUC == 0x08e ) ) {
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dStatus0.nCodeSet = CODE_JPN_EUC;
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dStatus0.cSavedByte = *pEUC;
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break;
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}
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#endif
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// Is the character Kanji?
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if ( *pEUC >= 0x0a1 && *pEUC <= 0x0fe ) {
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pEUC+=2;
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i+=2;
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re+=2;
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continue;
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}
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// Is the charcter Hankaku KATAKANA ?
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if ( *pEUC == 0x08e ) {
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pEUC+=2;
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i+=2;
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re++;
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continue;
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}
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// Is the charcter ASCII charcter ?
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pEUC++;
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i++;
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re++;
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}
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return ( re );
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}
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#ifdef DBCS_DIVIDE
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if ( dStatus.nCodeSet == CODE_JPN_EUC ){
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UCHAR cEUC = dStatus.cSavedByte;
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if ( cEUC >= 0x0a1 && cEUC <= 0x0de ) {
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if ( cEUC % 2 == 1 ) { // odd
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*pSJIS = (cEUC - 0x0a1) / 2 + 0x081;
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goto ODD_SECOND_BYTE2;
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}
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else { // even
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*pSJIS = (cEUC - 0x0a2) / 2 + 0x081;
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goto EVEN_SECOND_BYTE2;
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}
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}
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if ( cEUC >= 0x0df && cEUC <= 0x0fe ) {
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if ( cEUC % 2 == 1 ) { // odd
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*pSJIS = (cEUC - 0x0df) / 2 + 0x0e0;
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goto ODD_SECOND_BYTE2;
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}
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else { // even
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*pSJIS = (cEUC - 0x0e0) / 2 + 0x0e0;
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goto EVEN_SECOND_BYTE2;
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}
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}
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// Is the charcter Hankaku KATAKANA ?
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if ( cEUC == 0x08e ) {
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*pSJIS++ = *pEUC++;
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i++;
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re++;
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goto END;
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}
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ODD_SECOND_BYTE2:
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if ( *pEUC >= 0x0a1 && *pEUC <= 0x0df ) {
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*(pSJIS+1) = *pEUC - 0x061;
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}
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else {
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*(pSJIS+1) = *pEUC - 0x060;
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}
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pEUC++;
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i++;
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re+=2;
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pSJIS+=2;
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goto END;
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EVEN_SECOND_BYTE2:
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*(pSJIS+1) = *pEUC - 2;
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pEUC++;
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i++;
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re+=2;
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pSJIS+=2;
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END:
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dStatus.nCodeSet = CODE_UNKNOWN;
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dStatus.cSavedByte = '\0';
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}
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#endif
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while ( i < EUC_len ) {
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#ifdef DBCS_DIVIDE
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if( ( i == EUC_len - 1 ) &&
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( *pEUC >= 0x0a1 && *pEUC <= 0x0fe || *pEUC == 0x08e ) ) {
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dStatus.nCodeSet = CODE_JPN_EUC;
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dStatus.cSavedByte = *pEUC;
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break;
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}
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#endif
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if ( re >= SJIS_len ) { // Buffer Over?
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return ( -1 );
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}
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if ( *pEUC >= 0x0a1 && *pEUC <= 0x0de ) {
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if ( (*pEUC)%2 == 1 ) { // odd
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*pSJIS = ((*pEUC)-0x0a1)/2+0x081;
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goto ODD_SECOND_BYTE;
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}
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else { // even
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*pSJIS = ((*pEUC)-0x0a2)/2+0x081;
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goto EVEN_SECOND_BYTE;
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}
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}
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if ( *pEUC >= 0x0df && *pEUC <= 0x0fe ) {
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if ( (*pEUC)%2 == 1 ) { // odd
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*pSJIS = ((*pEUC)-0x0df)/2+0x0e0;
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goto ODD_SECOND_BYTE;
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}
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else { // even
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*pSJIS = ((*pEUC)-0x0e0)/2+0x0e0;
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goto EVEN_SECOND_BYTE;
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}
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}
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// Is the charcter Hankaku KATAKANA ?
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if ( *pEUC == 0x08e ) {
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pEUC++;
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*pSJIS++ = *pEUC++;
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i+=2;
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re++;
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continue;
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}
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// Is the charcter ASCII charcter ?
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*pSJIS++ = *pEUC++;
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i++;
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re++;
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continue;
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ODD_SECOND_BYTE:
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if ( re + 1 >= SJIS_len ) { // Buffer Over?
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return ( -1 );
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}
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if ( *(pEUC+1) >= 0x0a1 && *(pEUC+1) <= 0x0df ) {
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*(pSJIS+1) = *(pEUC+1) - 0x061;
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}
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else {
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*(pSJIS+1) = *(pEUC+1) - 0x060;
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}
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pEUC+=2;
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i+=2;
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re+=2;
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pSJIS+=2;
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continue;
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EVEN_SECOND_BYTE:
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if ( re + 1 >= SJIS_len ) { // Buffer Over?
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return ( -1 );
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}
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*(pSJIS+1) = *(pEUC+1)-2;
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pEUC+=2;
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i+=2;
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re+=2;
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pSJIS+=2;
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continue;
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}
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return ( re );
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}
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