254 lines
7.8 KiB
C
254 lines
7.8 KiB
C
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// Copyright (c) Microsoft Corpration
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//
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// File Name: sjis2jis.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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void ShiftJISChar_to_JISChar ( UCHAR *pShiftJIS, UCHAR *pJIS )
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// The ShiftJISChar_to_JISChar function convert one character string
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// as Shift JIS code to a JIS code string.
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//
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// UCHAR *pShiftJIS Points to the character string to be converted.
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//
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// UCHAR *pJIS Points to a buffer that receives the convert string
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// from Shift JIS Code to JIS.
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//
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// Return Value
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// None
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{
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USHORT hi_code, low_code;
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hi_code = (*pShiftJIS);
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low_code = *(pShiftJIS+1);
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hi_code -= (hi_code > 0x9f ? 0xb1 : 0x71);
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hi_code = hi_code * 2 + 1;
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if ( low_code > 0x9e ) {
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low_code -= 0x7e;
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hi_code ++;
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}
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else {
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if ( low_code > 0x7e ) {
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low_code --;
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}
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low_code -= 0x1f;
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}
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*(pJIS) = (UCHAR)hi_code;
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*(pJIS+1) = (UCHAR)low_code;
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return;
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}
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int ShiftJIS_to_JIS ( UCHAR *pShiftJIS, int ShiftJIS_len,
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UCHAR *pJIS, int JIS_len )
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// The ShiftJIS_to_JIS function convert a character string as Shift JIS code
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// to a JIS code string.
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//
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// UCHAR *pShiftJIS Points to the character string to be converted.
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//
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// int ShiftJIS_len Specifies the size in bytes of the string pointed
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// to by the pShiftJIS 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 *pJIS Points to a buffer that receives the convert string
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// from Shift JIS Code to JIS.
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//
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// int JIS_len Specifies the size, in JIS characters of the buffer
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// pointed to by the pJIS parameter. If the value is zero,
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// the function returns the number of JIS characters
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// required for the buffer, and makes no use of the pJIS
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// buffer.
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//
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// Return Value
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// If the function succeeds, and JIS_len is nonzero, the return value is the
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// number of JIS characters written to the buffer pointed to by pJIS.
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//
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// If the function succeeds, and JIS_len is zero, the return value is the
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// required size, in 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 pJIS buffer
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// is small for setting converted strings.
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//
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{
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BOOL kanji_in = FALSE; // Kanji Mode
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BOOL kana_in = FALSE; // Kana Mode
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int re; // Convert Lenght
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int i; // Loop Counter
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if ( ShiftJIS_len == -1 ) {
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// If length is not set, last character of the strings is NULL.
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ShiftJIS_len = strlen ( pShiftJIS ) + 1;
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}
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i = 0;
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re = 0;
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if ( JIS_len == 0 ) {
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// Only retrun the required size
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while ( i < ShiftJIS_len ) {
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if ( SJISISKANJI(*pShiftJIS) ) { // Is this charcter 2 bytes Kanji?
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if ( kana_in ) { // Kana Mode?
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re ++;
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kana_in = FALSE; // Reset Kana Mode;
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}
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if ( kanji_in == FALSE ) { // Kanji Mode?
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re += KANJI_IN_LEN;
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kanji_in = TRUE; // Set Kanji Mode
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}
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i+=2;
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re += 2;
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pShiftJIS+=2;
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}
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else if ( SJISISKANA(*pShiftJIS) ) {
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if ( kanji_in ) {
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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if ( kana_in == FALSE ) {
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re ++;
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kana_in = TRUE;
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}
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i++;
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re++;
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pShiftJIS++;
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}
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else {
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if ( kana_in ) {
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re ++;
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kana_in = FALSE;
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}
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if ( kanji_in ) {
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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i++;
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re++;
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pShiftJIS++;
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}
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}
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if ( kana_in ) {
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re ++;
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kana_in = FALSE;
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}
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if ( kanji_in ) {
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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return ( re );
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}
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while ( i < ShiftJIS_len ) {
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if ( SJISISKANJI(*pShiftJIS) ) { // Is this charcter 2 bytes Kanji?
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if ( kana_in ) { // Kana Mode?
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = SI; // Set Kana Out Charcter
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re ++;
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kana_in = FALSE; // Reset Kana Mode;
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}
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if ( kanji_in == FALSE ) { // Kanji Mode?
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if ( re + KANJI_IN_LEN > JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = ESC; // Set Kanji In Charcter
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(*pJIS++) = KANJI_IN_1ST_CHAR;
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(*pJIS++) = KANJI_IN_2ND_CHAR1;
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re += KANJI_IN_LEN;
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kanji_in = TRUE; // Set Kanji Mode
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}
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if ( re + 2 > JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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ShiftJISChar_to_JISChar ( pShiftJIS, pJIS );
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i+=2;
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re += 2;
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pShiftJIS+=2;
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pJIS += 2;
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}
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else if ( SJISISKANA(*pShiftJIS) ) {
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if ( kanji_in ) {
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if ( re + KANJI_OUT_LEN > JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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// Set Kanji Out Charcter
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(*pJIS++) = ESC;
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(*pJIS++) = KANJI_OUT_1ST_CHAR;
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(*pJIS++) = KANJI_OUT_2ND_CHAR1;
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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if ( kana_in == FALSE ) {
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = SO; // Set Kana In Charcter
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re ++;
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kana_in = TRUE;
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}
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = (*pShiftJIS++) & 0x7f;
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i++;
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re++;
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}
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else {
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if ( kana_in ) {
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = SI; // Set Kana Out Charcter
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re ++;
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kana_in = FALSE;
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}
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if ( kanji_in ) {
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if ( re + KANJI_OUT_LEN > JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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// Set Kanji Out Charcter
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(*pJIS++) = ESC;
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(*pJIS++) = KANJI_OUT_1ST_CHAR;
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(*pJIS++) = KANJI_OUT_2ND_CHAR1;
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = (*pShiftJIS++);
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i++;
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re++;
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}
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}
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if ( kana_in ) {
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if ( re >= JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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(*pJIS++) = SI; // Set Kana Out Charcter
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re ++;
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kana_in = FALSE;
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}
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if ( kanji_in ) {
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if ( re + KANJI_OUT_LEN > JIS_len ) { // Buffer Over?
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return ( -1 );
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}
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// Set Kanji Out Charcter
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(*pJIS++) = ESC;
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(*pJIS++) = KANJI_OUT_1ST_CHAR;
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(*pJIS++) = KANJI_OUT_2ND_CHAR1;
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re += KANJI_OUT_LEN;
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kanji_in = FALSE;
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}
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return ( re );
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}
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