1*16d86563SAlexander Pyhalov /*
2*16d86563SAlexander Pyhalov * CDDL HEADER START
3*16d86563SAlexander Pyhalov *
4*16d86563SAlexander Pyhalov * The contents of this file are subject to the terms of the
5*16d86563SAlexander Pyhalov * Common Development and Distribution License (the "License").
6*16d86563SAlexander Pyhalov * You may not use this file except in compliance with the License.
7*16d86563SAlexander Pyhalov *
8*16d86563SAlexander Pyhalov * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
9*16d86563SAlexander Pyhalov * or http://www.opensolaris.org/os/licensing.
10*16d86563SAlexander Pyhalov * See the License for the specific language governing permissions
11*16d86563SAlexander Pyhalov * and limitations under the License.
12*16d86563SAlexander Pyhalov *
13*16d86563SAlexander Pyhalov * When distributing Covered Code, include this CDDL HEADER in each
14*16d86563SAlexander Pyhalov * file and include the License file at src/OPENSOLARIS.LICENSE.
15*16d86563SAlexander Pyhalov * If applicable, add the following below this CDDL HEADER, with the
16*16d86563SAlexander Pyhalov * fields enclosed by brackets "[]" replaced with your own identifying
17*16d86563SAlexander Pyhalov * information: Portions Copyright [yyyy] [name of copyright owner]
18*16d86563SAlexander Pyhalov *
19*16d86563SAlexander Pyhalov * CDDL HEADER END
20*16d86563SAlexander Pyhalov */
21*16d86563SAlexander Pyhalov /*
22*16d86563SAlexander Pyhalov * Copyright (c) 1995 by Sun Microsystems, Inc.
23*16d86563SAlexander Pyhalov * All Rights Reserved.
24*16d86563SAlexander Pyhalov */
25*16d86563SAlexander Pyhalov
26*16d86563SAlexander Pyhalov
27*16d86563SAlexander Pyhalov #include <stdio.h>
28*16d86563SAlexander Pyhalov #include <libintl.h>
29*16d86563SAlexander Pyhalov #include <stdlib.h>
30*16d86563SAlexander Pyhalov #include <errno.h>
31*16d86563SAlexander Pyhalov #include "ktable.h"
32*16d86563SAlexander Pyhalov #include "hangulcode.h"
33*16d86563SAlexander Pyhalov
34*16d86563SAlexander Pyhalov #define MSB 0x80
35*16d86563SAlexander Pyhalov #define MSB_OFF 0x7f
36*16d86563SAlexander Pyhalov
37*16d86563SAlexander Pyhalov struct _cv_state {
38*16d86563SAlexander Pyhalov int _st_status;
39*16d86563SAlexander Pyhalov int _gstate;
40*16d86563SAlexander Pyhalov };
41*16d86563SAlexander Pyhalov
42*16d86563SAlexander Pyhalov enum _GSTATE { _nostate, _g0, _g1};
43*16d86563SAlexander Pyhalov
44*16d86563SAlexander Pyhalov enum SHIFT_STAT {SHIFT_IN, SHIFT_OUT};
45*16d86563SAlexander Pyhalov
46*16d86563SAlexander Pyhalov
47*16d86563SAlexander Pyhalov typedef struct __conv_desc {
48*16d86563SAlexander Pyhalov char designated;
49*16d86563SAlexander Pyhalov enum { ASCII, WANSUNG } state;
50*16d86563SAlexander Pyhalov } _conv_desc;
51*16d86563SAlexander Pyhalov
52*16d86563SAlexander Pyhalov
53*16d86563SAlexander Pyhalov /**** _ I C V _ O P E N ****/
54*16d86563SAlexander Pyhalov
_icv_open()55*16d86563SAlexander Pyhalov void* _icv_open()
56*16d86563SAlexander Pyhalov {
57*16d86563SAlexander Pyhalov _conv_desc* cd = (_conv_desc*)malloc(sizeof(_conv_desc));
58*16d86563SAlexander Pyhalov
59*16d86563SAlexander Pyhalov if (cd == (_conv_desc*)NULL)
60*16d86563SAlexander Pyhalov {
61*16d86563SAlexander Pyhalov errno = ENOMEM;
62*16d86563SAlexander Pyhalov return((void*)-1);
63*16d86563SAlexander Pyhalov }
64*16d86563SAlexander Pyhalov
65*16d86563SAlexander Pyhalov cd->designated = 0;
66*16d86563SAlexander Pyhalov cd->state = ASCII;
67*16d86563SAlexander Pyhalov
68*16d86563SAlexander Pyhalov return((void*)cd);
69*16d86563SAlexander Pyhalov } /* end of int _icv_open(). */
70*16d86563SAlexander Pyhalov
71*16d86563SAlexander Pyhalov
72*16d86563SAlexander Pyhalov /**** _ I C V _ C L O S E ****/
73*16d86563SAlexander Pyhalov
_icv_close(_conv_desc * cd)74*16d86563SAlexander Pyhalov void _icv_close(_conv_desc* cd)
75*16d86563SAlexander Pyhalov {
76*16d86563SAlexander Pyhalov if (!cd)
77*16d86563SAlexander Pyhalov errno = EBADF;
78*16d86563SAlexander Pyhalov else
79*16d86563SAlexander Pyhalov free((void*)cd);
80*16d86563SAlexander Pyhalov } /* end of void _icv_close(_conv_desc*). */
81*16d86563SAlexander Pyhalov
82*16d86563SAlexander Pyhalov
83*16d86563SAlexander Pyhalov /**** _ I C V _ I C O N V ****/
84*16d86563SAlexander Pyhalov
_icv_iconv(_conv_desc * cd,char ** inbuf,size_t * inbufleft,char ** outbuf,size_t * outbufleft)85*16d86563SAlexander Pyhalov size_t _icv_iconv(_conv_desc* cd, char** inbuf, size_t* inbufleft,
86*16d86563SAlexander Pyhalov char** outbuf, size_t* outbufleft)
87*16d86563SAlexander Pyhalov {
88*16d86563SAlexander Pyhalov size_t ret_val = 0;
89*16d86563SAlexander Pyhalov unsigned char* ib;
90*16d86563SAlexander Pyhalov unsigned char* ob;
91*16d86563SAlexander Pyhalov unsigned char* ibtail;
92*16d86563SAlexander Pyhalov unsigned char* obtail;
93*16d86563SAlexander Pyhalov
94*16d86563SAlexander Pyhalov if (!cd)
95*16d86563SAlexander Pyhalov {
96*16d86563SAlexander Pyhalov errno = EBADF;
97*16d86563SAlexander Pyhalov return((size_t)-1);
98*16d86563SAlexander Pyhalov }
99*16d86563SAlexander Pyhalov
100*16d86563SAlexander Pyhalov if (!inbuf || !(*inbuf))
101*16d86563SAlexander Pyhalov {
102*16d86563SAlexander Pyhalov if (cd->state == WANSUNG)
103*16d86563SAlexander Pyhalov {
104*16d86563SAlexander Pyhalov if (outbufleft && *outbufleft >= 1 && outbuf && *outbuf)
105*16d86563SAlexander Pyhalov {
106*16d86563SAlexander Pyhalov **outbuf = SI;
107*16d86563SAlexander Pyhalov (*outbuf)++;
108*16d86563SAlexander Pyhalov (*outbufleft)--;
109*16d86563SAlexander Pyhalov }
110*16d86563SAlexander Pyhalov else
111*16d86563SAlexander Pyhalov {
112*16d86563SAlexander Pyhalov errno = E2BIG;
113*16d86563SAlexander Pyhalov return((size_t)-1);
114*16d86563SAlexander Pyhalov }
115*16d86563SAlexander Pyhalov }
116*16d86563SAlexander Pyhalov
117*16d86563SAlexander Pyhalov cd->designated = 0;
118*16d86563SAlexander Pyhalov cd->state = ASCII;
119*16d86563SAlexander Pyhalov return((size_t)0);
120*16d86563SAlexander Pyhalov }
121*16d86563SAlexander Pyhalov
122*16d86563SAlexander Pyhalov ib = (unsigned char*)*inbuf;
123*16d86563SAlexander Pyhalov ob = (unsigned char*)*outbuf;
124*16d86563SAlexander Pyhalov ibtail = ib + *inbufleft;
125*16d86563SAlexander Pyhalov obtail = ob + *outbufleft;
126*16d86563SAlexander Pyhalov
127*16d86563SAlexander Pyhalov while (ib < ibtail)
128*16d86563SAlexander Pyhalov {
129*16d86563SAlexander Pyhalov if (!(*ib & 0x80)) /* 7 bits */
130*16d86563SAlexander Pyhalov {
131*16d86563SAlexander Pyhalov if (cd->state == WANSUNG)
132*16d86563SAlexander Pyhalov {
133*16d86563SAlexander Pyhalov if (ob >= obtail)
134*16d86563SAlexander Pyhalov {
135*16d86563SAlexander Pyhalov errno = E2BIG;
136*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
137*16d86563SAlexander Pyhalov break;
138*16d86563SAlexander Pyhalov }
139*16d86563SAlexander Pyhalov *ob++ = SI;
140*16d86563SAlexander Pyhalov cd->state = ASCII;
141*16d86563SAlexander Pyhalov }
142*16d86563SAlexander Pyhalov if (ob >= obtail)
143*16d86563SAlexander Pyhalov {
144*16d86563SAlexander Pyhalov errno = E2BIG;
145*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
146*16d86563SAlexander Pyhalov break;
147*16d86563SAlexander Pyhalov }
148*16d86563SAlexander Pyhalov *ob++ = *ib++;
149*16d86563SAlexander Pyhalov }
150*16d86563SAlexander Pyhalov else
151*16d86563SAlexander Pyhalov {
152*16d86563SAlexander Pyhalov if ((ibtail - ib) < 2)
153*16d86563SAlexander Pyhalov {
154*16d86563SAlexander Pyhalov errno = EINVAL;
155*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
156*16d86563SAlexander Pyhalov break;
157*16d86563SAlexander Pyhalov }
158*16d86563SAlexander Pyhalov
159*16d86563SAlexander Pyhalov if (!cd->designated)
160*16d86563SAlexander Pyhalov {
161*16d86563SAlexander Pyhalov if ((obtail - ob) < 4)
162*16d86563SAlexander Pyhalov {
163*16d86563SAlexander Pyhalov errno = E2BIG;
164*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
165*16d86563SAlexander Pyhalov break;
166*16d86563SAlexander Pyhalov }
167*16d86563SAlexander Pyhalov *ob++ = ESC; *ob++ = '$';
168*16d86563SAlexander Pyhalov *ob++ = ')'; *ob++ = 'C';
169*16d86563SAlexander Pyhalov cd->designated = 1;
170*16d86563SAlexander Pyhalov }
171*16d86563SAlexander Pyhalov if (cd->state == ASCII)
172*16d86563SAlexander Pyhalov {
173*16d86563SAlexander Pyhalov if (ob >= obtail)
174*16d86563SAlexander Pyhalov {
175*16d86563SAlexander Pyhalov errno = E2BIG;
176*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
177*16d86563SAlexander Pyhalov break;
178*16d86563SAlexander Pyhalov }
179*16d86563SAlexander Pyhalov *ob++ = SO;
180*16d86563SAlexander Pyhalov cd->state = WANSUNG;
181*16d86563SAlexander Pyhalov }
182*16d86563SAlexander Pyhalov
183*16d86563SAlexander Pyhalov if ((obtail - ob) < 2)
184*16d86563SAlexander Pyhalov {
185*16d86563SAlexander Pyhalov errno = E2BIG;
186*16d86563SAlexander Pyhalov ret_val = (size_t)-1;
187*16d86563SAlexander Pyhalov break;
188*16d86563SAlexander Pyhalov }
189*16d86563SAlexander Pyhalov *ob++ = *ib++ & 0x7F;
190*16d86563SAlexander Pyhalov *ob++ = *ib++ & 0x7F;
191*16d86563SAlexander Pyhalov }
192*16d86563SAlexander Pyhalov }
193*16d86563SAlexander Pyhalov
194*16d86563SAlexander Pyhalov *inbuf = (char*)ib;
195*16d86563SAlexander Pyhalov *inbufleft = ibtail - ib;
196*16d86563SAlexander Pyhalov *outbuf = (char*)ob;
197*16d86563SAlexander Pyhalov *outbufleft = obtail - ob;
198*16d86563SAlexander Pyhalov
199*16d86563SAlexander Pyhalov return(ret_val);
200*16d86563SAlexander Pyhalov } /* end of size_t _icv_iconv(_conv_desc*, char**, size_t*, char**, size_t*).*/
201*16d86563SAlexander Pyhalov
202*16d86563SAlexander Pyhalov void *
_cv_open()203*16d86563SAlexander Pyhalov _cv_open()
204*16d86563SAlexander Pyhalov {
205*16d86563SAlexander Pyhalov struct _cv_state *st;
206*16d86563SAlexander Pyhalov
207*16d86563SAlexander Pyhalov if ((st = (struct _cv_state *)malloc(sizeof(struct _cv_state))) == NULL)
208*16d86563SAlexander Pyhalov return ((void *)-1);
209*16d86563SAlexander Pyhalov
210*16d86563SAlexander Pyhalov st->_st_status = SHIFT_IN;
211*16d86563SAlexander Pyhalov st->_gstate = _nostate;
212*16d86563SAlexander Pyhalov
213*16d86563SAlexander Pyhalov return (st);
214*16d86563SAlexander Pyhalov }
215*16d86563SAlexander Pyhalov
216*16d86563SAlexander Pyhalov void
_cv_close(struct _cv_state * st)217*16d86563SAlexander Pyhalov _cv_close(struct _cv_state *st)
218*16d86563SAlexander Pyhalov {
219*16d86563SAlexander Pyhalov free(st);
220*16d86563SAlexander Pyhalov }
221*16d86563SAlexander Pyhalov
222*16d86563SAlexander Pyhalov
223*16d86563SAlexander Pyhalov size_t
_cv_enconv(struct _cv_state * st,char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft)224*16d86563SAlexander Pyhalov _cv_enconv(struct _cv_state *st, char **inbuf, size_t*inbytesleft,
225*16d86563SAlexander Pyhalov char **outbuf, size_t*outbytesleft)
226*16d86563SAlexander Pyhalov {
227*16d86563SAlexander Pyhalov if (inbuf == NULL || *inbuf == NULL) { /* Reset request. */
228*16d86563SAlexander Pyhalov if (st->_st_status == SHIFT_OUT && *outbytesleft > 0)
229*16d86563SAlexander Pyhalov {
230*16d86563SAlexander Pyhalov **outbuf = SI;
231*16d86563SAlexander Pyhalov (*outbytesleft)--;
232*16d86563SAlexander Pyhalov (*outbuf)++;
233*16d86563SAlexander Pyhalov }
234*16d86563SAlexander Pyhalov st->_st_status = SHIFT_IN;
235*16d86563SAlexander Pyhalov st->_gstate = _nostate;
236*16d86563SAlexander Pyhalov /*
237*16d86563SAlexander Pyhalov * Note that no shift sequence is needed for
238*16d86563SAlexander Pyhalov * thetarget encoding.
239*16d86563SAlexander Pyhalov */
240*16d86563SAlexander Pyhalov return (0);
241*16d86563SAlexander Pyhalov }
242*16d86563SAlexander Pyhalov
243*16d86563SAlexander Pyhalov if ( st->_gstate == _nostate )
244*16d86563SAlexander Pyhalov st->_gstate = _g0;
245*16d86563SAlexander Pyhalov
246*16d86563SAlexander Pyhalov while (*inbytesleft > 0 && *outbytesleft > 0) {
247*16d86563SAlexander Pyhalov if ( **inbuf & MSB ) {
248*16d86563SAlexander Pyhalov if (st->_st_status == SHIFT_IN ) {
249*16d86563SAlexander Pyhalov if ( st->_gstate == _g0 ) {
250*16d86563SAlexander Pyhalov /*
251*16d86563SAlexander Pyhalov * Check the outbytesleft : enough to hold ESC sequence
252*16d86563SAlexander Pyhalov */
253*16d86563SAlexander Pyhalov if ( *outbytesleft < 4 ) {
254*16d86563SAlexander Pyhalov break;
255*16d86563SAlexander Pyhalov }
256*16d86563SAlexander Pyhalov
257*16d86563SAlexander Pyhalov st->_gstate = _g1;
258*16d86563SAlexander Pyhalov
259*16d86563SAlexander Pyhalov **outbuf = ESC;
260*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
261*16d86563SAlexander Pyhalov **outbuf = '$';
262*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
263*16d86563SAlexander Pyhalov **outbuf = ')';
264*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
265*16d86563SAlexander Pyhalov **outbuf = 'C';
266*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
267*16d86563SAlexander Pyhalov
268*16d86563SAlexander Pyhalov if ( *outbytesleft <= 0 )
269*16d86563SAlexander Pyhalov break;
270*16d86563SAlexander Pyhalov }
271*16d86563SAlexander Pyhalov
272*16d86563SAlexander Pyhalov st->_st_status = SHIFT_OUT;
273*16d86563SAlexander Pyhalov **outbuf = SO;
274*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
275*16d86563SAlexander Pyhalov
276*16d86563SAlexander Pyhalov if ( *outbytesleft <= 0 )
277*16d86563SAlexander Pyhalov break;
278*16d86563SAlexander Pyhalov }
279*16d86563SAlexander Pyhalov
280*16d86563SAlexander Pyhalov **outbuf = **inbuf & MSB_OFF;
281*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
282*16d86563SAlexander Pyhalov
283*16d86563SAlexander Pyhalov } else {
284*16d86563SAlexander Pyhalov if (st->_st_status == SHIFT_OUT) {
285*16d86563SAlexander Pyhalov st->_st_status = SHIFT_IN;
286*16d86563SAlexander Pyhalov **outbuf = SI;
287*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
288*16d86563SAlexander Pyhalov
289*16d86563SAlexander Pyhalov if ( *outbytesleft <= 0 )
290*16d86563SAlexander Pyhalov break;
291*16d86563SAlexander Pyhalov }
292*16d86563SAlexander Pyhalov
293*16d86563SAlexander Pyhalov **outbuf = **inbuf;
294*16d86563SAlexander Pyhalov (*outbuf)++, (*outbytesleft)--;
295*16d86563SAlexander Pyhalov
296*16d86563SAlexander Pyhalov }
297*16d86563SAlexander Pyhalov
298*16d86563SAlexander Pyhalov (*inbuf)++, (*inbytesleft)--;
299*16d86563SAlexander Pyhalov }
300*16d86563SAlexander Pyhalov return (*inbytesleft);
301*16d86563SAlexander Pyhalov }
302