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157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* katakana.c
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*
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* Half- to Full-width Katakana Conversion for SJIS and EUC.
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* based on the book of Ken Lunde
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* (Understanding Japanese Information Processing, Published by O'Reilly; 09/1993; ISBN: 1565920430).
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*/
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#if defined(MOZ_MAIL_NEWS)
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#include "intlpriv.h"
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#include "prefapi.h"
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#include "katakana.h"
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#define ISMARU(A) (A >= 202 && A <= 206)
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#define ISNIGORI(A) ((A >= 182 && A <= 196) || (A >= 202 && A <= 206) || (A == 179))
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#define HANKATA(c) (c >= 161 && c <= 223) /* 0xa1 - 0xdf */
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/* pref related prototype and variables */
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PUBLIC int PR_CALLBACK intl_SetSendHankakuKana(const char * newpref, void * data);
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static XP_Bool pref_callback_installed = FALSE;
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static XP_Bool send_hankaku_kana = FALSE;
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static const char *pref_send_hankaku_kana = "mailnews.send_hankaku_kana";
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static void han2zen(XP_Bool insjis, unsigned char *inbuf, uint32 inlen,
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unsigned char *outbuf, XP_Bool *composite)
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{
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unsigned char c1 = *inbuf++;
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unsigned char c2;
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unsigned char tmp = c1;
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unsigned char junk;
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XP_Bool maru = FALSE;
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XP_Bool nigori = FALSE;
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unsigned char mtable[][2] = {
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{129,66},{129,117},{129,118},{129,65},{129,69},{131,146},{131,64},
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{131,66},{131,68},{131,70},{131,72},{131,131},{131,133},{131,135},
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{131,98},{129,91},{131,65},{131,67},{131,69},{131,71},{131,73},
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{131,74},{131,76},{131,78},{131,80},{131,82},{131,84},{131,86},
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{131,88},{131,90},{131,92},{131,94},{131,96},{131,99},{131,101},
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{131,103},{131,105},{131,106},{131,107},{131,108},{131,109},
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{131,110},{131,113},{131,116},{131,119},{131,122},{131,125},
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{131,126},{131,128},{131,129},{131,130},{131,132},{131,134},
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{131,136},{131,137},{131,138},{131,139},{131,140},{131,141},
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{131,143},{131,147},{131,74},{129,75}
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};
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if (inlen > 1)
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{
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if (insjis)
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{
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c2 = *inbuf;
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if (c2 == 222 && ISNIGORI(c1))
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nigori = TRUE;
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if (c2 == 223 && ISMARU(c1))
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maru = TRUE;
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}
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else /* EUC */
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{
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junk = *inbuf++;
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c2 = *inbuf;
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if (junk == SS2) /* If the variable junk is SS2, we have another half-
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width katakana. */
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{
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if (c2 == 222 && ISNIGORI(c1))
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nigori = TRUE;
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if (c2 == 223 && ISMARU(c1))
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maru = TRUE;
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}
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}
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}
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if (HANKATA(tmp)) /* Check to see if tmp is in half-width katakana range. */
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{
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c1 = mtable[tmp - 161][0]; /* Calculate first byte using mapping table */
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c2 = mtable[tmp - 161][1]; /* Calculate second byte using mapping table */
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}
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if (nigori)
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{
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if ((c2 >= 74 && c2 <= 103) || (c2 >= 110 && c2 <= 122))
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c2++;
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else if (c1 == 131 && c2 == 69)
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c2 = 148;
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}
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else if (maru && c2 >= 110 && c2 <= 122)
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c2 += 2;
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*outbuf++ = c1;
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*outbuf = c2;
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*composite = maru || nigori;
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}
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/*
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* Half to full Katakana conversion for SJIS. Caller need to allocate outbuf (x2 of inbuf).
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*/
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MODULE_PRIVATE void INTL_SjisHalf2FullKana(unsigned char *inbuf, uint32 inlen, unsigned char *outbuf, uint32 *byteused)
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{
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XP_Bool composite;
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han2zen(TRUE, inbuf, inlen, outbuf, &composite);
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*byteused = composite ? 2 : 1;
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}
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/*
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* Half to full Katakana conversion for EUC. Caller need to allocate outbuf (x3 of inbuf).
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*/
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MODULE_PRIVATE void INTL_EucHalf2FullKana(unsigned char *inbuf, uint32 inlen, unsigned char *outbuf, uint32 *byteused)
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{
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XP_Bool composite;
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han2zen(FALSE, inbuf, inlen, outbuf, &composite);
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*byteused = composite ? 3 : 1; /* 2 chars plus SS2 or 1 char */
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}
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/* callback routine invoked by prefapi when the pref value changes */
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PUBLIC int PR_CALLBACK intl_SetSendHankakuKana(const char * newpref, void * data)
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{
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return PREF_GetBoolPref(pref_send_hankaku_kana, &send_hankaku_kana);
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}
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MODULE_PRIVATE XP_Bool INTL_GetSendHankakuKana()
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{
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if (!pref_callback_installed)
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{
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PREF_GetBoolPref(pref_send_hankaku_kana, &send_hankaku_kana);
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PREF_RegisterCallback(pref_send_hankaku_kana, intl_SetSendHankakuKana, NULL);
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pref_callback_installed = TRUE;
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}
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return send_hankaku_kana;
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}
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#else
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#ifdef OSF1
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static int dumbcc = 0; /* The 3.2 compiler aborts when there's "nothing to compile", and 4.0 warns. This fixes both problems. */
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#endif
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#endif /* MOZ_MAIL_NEWS */
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