1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 1994, Sun Microsystems, Inc. 23 * Copyright (c) 1994, Nihon Sun Microsystems K.K. 24 */ 25 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <errno.h> 29 #include <euc.h> 30 #include "japanese.h" 31 32 /* 33 * struct _cv_state; to keep status 34 */ 35 struct _icv_state { 36 int _st_cset; 37 int _st_stat; 38 }; 39 40 extern int errno; 41 42 /* 43 * Open; called from iconv_open(); as taken unchanged from @(#)ISO-2022-JP%SJIS. 44 */ 45 void * 46 _icv_open() 47 { 48 struct _icv_state *st; 49 50 if ((st = (struct _icv_state *)malloc(sizeof(struct _icv_state))) 51 == NULL) 52 return ((void *)ERR_RETURN); 53 54 st->_st_cset = CS_0; 55 st->_st_stat = ST_INIT; 56 57 return (st); 58 } 59 60 61 /* 62 * Close; called from iconv_close(); as taken unchanged from @(#)ISO-2022-JP%SJIS. 63 */ 64 void 65 _icv_close(struct _icv_state *st) 66 { 67 free(st); 68 } 69 70 71 72 /* 73 * Actual conversion; called from iconv() 74 */ 75 size_t 76 _icv_iconv(struct _icv_state *st, char **inbuf, size_t *inbytesleft, 77 char **outbuf, size_t *outbytesleft) 78 { 79 int cset, stat; 80 unsigned char *op, ic; 81 char *ip; 82 size_t ileft, oleft; 83 size_t retval; 84 85 cset = st->_st_cset; 86 stat = st->_st_stat; 87 88 /* 89 * If (inbuf == 0 || *inbuf == 0) then this conversion is 90 * placed into initial state. 91 */ 92 if ((inbuf == 0) || (*inbuf == 0)) { 93 cset = CS_0; 94 stat = ST_INIT; 95 op = (unsigned char *)*outbuf; 96 oleft = *outbytesleft; 97 retval = 0; 98 goto ret2; 99 } 100 101 ip = *inbuf; 102 op = (unsigned char *)*outbuf; 103 ileft = *inbytesleft; 104 oleft = *outbytesleft; 105 /* Everything down to here was taken unchanged from @(#)ISO-2022-JP%SJIS. 106 ======================================================================= 107 108 * 109 * Main loop; basically 1 loop per 1 input byte 110 */ 111 112 while (ileft > 0) 113 { 114 GET(ic); 115 /* 116 If the char is one of the following [ / ] { | } then convert 117 it to its corresponding value. In all other cases if the char 118 is greater than octal \178 ( ie a high bit char) convert it 119 to an underscore (_), as it has no mapping to 7 bit ASCII. 120 Otrherwise the char is the same in both cose sets. 121 */ 122 if ( ic == '\043' ) 123 ic = '_'; 124 else if ( ic == '\100' ) 125 ic = '_'; 126 else if ( ic == '[' ) 127 ic = '_'; 128 else if ( ic == '\134' ) 129 ic = '_'; 130 else if ( ic == ']' ) 131 ic = '_'; 132 else if ( ic == '{' ) 133 ic = '_'; 134 else if ( ic == '~' ) 135 ic = '_'; 136 else if ( ic == '|' ) 137 ic = '_'; 138 else if ( ic == '}' ) 139 ic = '_'; 140 else if ( ic == 163 ) 141 ic = '\043'; 142 else if ( ic == 167 ) 143 ic = ']'; 144 else if ( ic == 168 ) 145 ic = '~'; 146 else if ( ic == 176 ) 147 ic = '['; 148 else if ( ic == 224 ) 149 ic = '\100'; 150 else if ( ic == 231 ) 151 ic = '\\'; 152 else if ( ic == 249 ) 153 ic = '|'; 154 else if ( ic == 232 ) 155 ic = '}'; 156 else if ( ic == 233 ) 157 ic = '{'; 158 else if (ic > '\177') 159 ic = '_'; 160 161 162 163 164 /* switch ( ic ) 165 { 166 case '\043' : 167 ic = '_'; 168 break; 169 case '\100' : 170 ic = '_'; 171 break; 172 case '[' : 173 ic = '_'; 174 break; 175 case '\134' : 176 ic = '_'; 177 break; 178 case ']' : 179 ic = '_'; 180 break; 181 case '{' : 182 ic = '_'; 183 break; 184 case '~' : 185 ic = '_'; 186 break; 187 case '|' : 188 ic = '_'; 189 break; 190 case '}' : 191 ic = '_'; 192 break; 193 case 163 : 194 ic = '\043'; 195 break; 196 case 167 : 197 ic = ']'; 198 break; 199 case 168 : 200 ic = '~'; 201 break; 202 case 176 : 203 ic = '['; 204 break; 205 case 224 : 206 ic = '\100'; 207 break; 208 case 231 : 209 ic = '\\'; 210 break; 211 case 249 : 212 ic = '|'; 213 break; 214 case 232 : 215 ic = '}'; 216 break; 217 case 233 : 218 ic = '{'; 219 break; 220 default : 221 if (ic > '\177') 222 ic = '_'; 223 break; 224 } */ 225 226 PUT(ic); 227 /* 228 Put the converted character into the output buffer, and decrement 229 the count of chars left in both the in and out buffers. 230 If we have no space left in the out buffer, but we have no reached 231 the end of the input buffer. We return what we have, and set the 232 errno (Error) to E2BIG. 233 */ 234 if ((oleft < 1) && (ileft > 0)) 235 { 236 errno = E2BIG; 237 retval = ERR_RETURN; 238 goto ret; 239 } 240 241 242 } 243 /* 244 We only get here if the end of the in buffer has been reached, we therefore return the 245 value 0 to denote that we have sucesfully converted the inbuffer. 246 */ 247 retval = ileft; 248 249 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */ 250 251 ret: 252 st->_st_cset = cset; 253 st->_st_stat = stat; 254 *inbuf = ip; 255 *inbytesleft = ileft; 256 ret2: 257 *outbuf = (char *)op; 258 *outbytesleft = oleft; 259 260 return (retval); 261 } 262