301 lines
6.3 KiB
C
301 lines
6.3 KiB
C
/*
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* Copyright (c) 1994 Sony Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL SONY CORPORATION BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Sony Corporation
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* shall not be used in advertising or otherwise to promote the sale, use
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* or other dealings in this Software without prior written authorization
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* from Sony Corporation.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <locale.h>
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#include "sj_euc.h"
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#include "sj_string.h"
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#ifndef TRUE
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#define TRUE (1)
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#define FALSE (0)
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#endif
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#define sjis2euc sj4_sjis2euc
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#define euc2sjis sj4_euc2sjis
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#define issjis1(c) (((0x81 <= (c)) && ((c) <= 0x9f)) || \
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((0xe0 <= (c)) && ((c) <= 0xfc)))
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#define iseuc(c) ((0xa1 <= (c)) && ((c) <= 0xfe))
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#define iskana(c) ((0xa1 <= (c)) && ((c) <= 0xdf))
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int sj4_str_sjistoeuc(unsigned char* out, int outlen, unsigned char* in, int inlen, unsigned char* sjis_default, int* useflag) {
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unsigned char *sjis = in, *euc = out;
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int n = 0;
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unsigned short code, default_code;
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euc[0] = '\0';
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*useflag = 0;
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if(!sjis)
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return 0;
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while((sjis - in) < inlen && *sjis && n < (outlen - 1)) {
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if(issjis1(*sjis)) {
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code = sjis2euc((*sjis << 8) | *(sjis + 1));
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if(n + 2 > outlen)
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return -1;
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if(code == 0) {
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default_code = sjis2euc((sjis_default[0] << 8) | sjis_default[1]);
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euc[n++] = default_code >> 8;
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euc[n++] = default_code & 0xff;
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(*useflag)++;
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} else {
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euc[n++] = code >> 8;
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euc[n++] = code & 0xff;
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}
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sjis += 2;
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} else {
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if(*sjis >= 0xa1 && *sjis <= 0xdf) {
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if(n + 2 > outlen)
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return -1;
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euc[n++] = SS2;
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}
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euc[n++] = *sjis;
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sjis++;
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}
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}
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if(n > (outlen - 1))
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return -1;
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euc[n] = '\0';
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return n;
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}
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int sj4_str_euctosjis(unsigned char* out, int outlen, unsigned char* in, int inlen, unsigned char* sjis_default, int* useflag) {
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unsigned char *euc = in, *sjis = out;
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int n = 0;
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unsigned short code, default_code;
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sjis[0] = '\0';
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*useflag = 0;
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if(!euc)
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return 0;
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while((euc - in) < inlen && *euc && n < outlen) {
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if(iseuc(*euc)) {
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code = euc2sjis((*euc << 8) | *(euc + 1));
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if(n + 2 > outlen)
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return -1;
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if(code == 0) {
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sjis[n++] = sjis_default[0];
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sjis[n++] = sjis_default[1];
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(*useflag)++;
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} else {
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sjis[n++] = code >> 8;
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sjis[n++] = code & 0xff;
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}
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euc += 2;
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} else if(*euc == SS3) {
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if(n + 2 > outlen)
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return -1;
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sjis[n++] = sjis_default[0];
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sjis[n++] = sjis_default[1];
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euc += 3;
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(*useflag)++;
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} else if(*euc == SS2) {
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sjis[n++] = *(euc + 1);
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euc += 2;
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} else {
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sjis[n++] = *euc;
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euc++;
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}
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}
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if(n > outlen)
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return -1;
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sjis[n] = '\0';
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return n;
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}
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int sj4_sjistoeuclen(unsigned char* str, int max) {
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int len = 0, bytes = 1;
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if(!max)
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return 0;
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while((bytes <= max) && *str) {
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if(issjis1(*str)) {
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str++;
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bytes++;
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if(!*str)
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break;
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len += 2;
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} else if(*str & 0x80) {
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len += 2;
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} else {
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len++;
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}
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str++;
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bytes++;
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}
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return len;
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}
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#define MASK 0x7f
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#define MSB 0x80
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static unsigned char def_char[] = {0x81, 0x40};
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int sj4_sjistoeuc(unsigned char* e, int elen, unsigned char* s, int slen) {
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int dummy;
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return sj4_str_sjistoeuc(e, elen, s, slen, def_char, &dummy);
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}
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int sj4_euctosjis(unsigned char* s, int slen, unsigned char* e, int elen) {
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int dummy;
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return sj4_str_euctosjis(s, slen, e, elen, def_char, &dummy);
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}
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void sj_euc2sjis(unsigned char* s) {
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s[0] &= MASK;
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s[1] &= MASK;
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sj_jis2sjis(s);
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}
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void sj_jis2sjis(unsigned char* s) {
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int high, low;
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int nh, nl;
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high = s[0];
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low = s[1];
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nh = ((high - 0x21) >> 1) + 0x81;
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if(nh > 0x9f)
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nh += 0x40;
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if(high & 1) {
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nl = low + 0x1f;
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if(low > 0x5f)
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nl++;
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} else
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nl = low + 0x7e;
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s[0] = nh;
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s[1] = nl;
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}
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void sj_sjis2euc(unsigned char* s) {
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sj_sjis2jis(s);
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s[0] |= MSB;
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s[1] |= MSB;
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}
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void sj_sjis2jis(unsigned char* s) {
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int byte1, byte2;
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unsigned char* sp;
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sp = s;
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byte1 = *sp++;
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byte2 = *sp--;
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if(byte1 <= 0x80 || byte1 >= 0xf0 || (byte1 >= 0xa0 && byte1 <= 0xdf) || byte2 <= 0x3f || byte2 >= 0xfe || byte2 == 0x7f) {
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byte1 = 0x81;
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byte2 = 0x40;
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}
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byte1 -= (byte1 >= 0xa0) ? 0xc1 : 0x81;
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if(byte2 >= 0x9f) {
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*sp++ = (byte1 << 1) + 0x22;
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*sp = byte2 - 0x7e;
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} else {
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*sp++ = (byte1 << 1) + 0x21;
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*sp = byte2 - ((byte2 <= 0x7e) ? 0x1f : 0x20);
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}
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}
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unsigned short
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sj4_jis2sjis(unsigned short code) {
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unsigned char tmp[3];
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tmp[0] = (code >> 8) & 0xff;
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tmp[1] = code & 0xff;
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tmp[2] = '\0';
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sj_jis2sjis((unsigned char*)tmp);
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code = (tmp[0] << 8) + tmp[1];
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return (code);
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}
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unsigned short
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sj4_jis2euc(unsigned short code) {
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unsigned char tmp[3];
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tmp[0] = (code >> 8) & 0xff;
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tmp[1] = code & 0xff;
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tmp[2] = '\0';
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code = ((tmp[0] | 0x80) << 8) + (tmp[1] | 0x80);
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return (code);
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}
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unsigned short
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sj4_sjis2jis(unsigned short code) {
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unsigned char tmp[3];
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tmp[0] = (code >> 8) & 0xff;
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tmp[1] = code & 0xff;
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tmp[2] = '\0';
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sj_sjis2jis((unsigned char*)tmp);
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code = (tmp[0] << 8) + tmp[1];
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return (code);
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}
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unsigned short
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sj4_euc2sjis(unsigned short code) {
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unsigned char tmp[3];
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tmp[0] = (code >> 8) & 0xff;
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tmp[1] = code & 0xff;
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tmp[2] = '\0';
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sj_euc2sjis((unsigned char*)tmp);
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code = (tmp[0] << 8) + tmp[1];
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return (code);
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}
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unsigned short
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sj4_sjis2euc(unsigned short code) {
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unsigned char tmp[3];
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tmp[0] = (code >> 8) & 0xff;
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tmp[1] = code & 0xff;
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tmp[2] = '\0';
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sj_sjis2euc((unsigned char*)tmp);
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code = (tmp[0] << 8) + tmp[1];
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return (code);
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}
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