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 switch ( ic ) 123 { 124 case '\100' : 125 ic = '\247'; 126 break; 127 case '[' : 128 ic = '\304'; 129 break; 130 case ']' : 131 ic = '\334'; 132 break; 133 case '{' : 134 ic = '\344'; 135 break; 136 case '|' : 137 ic = '\366'; 138 break; 139 case '}' : 140 ic = '\374'; 141 break; 142 case '\134' : 143 ic = '\326'; 144 break; 145 case '~' : 146 ic = '\337'; 147 break; 148 default : 149 if (ic > '\177') 150 ic = '_'; 151 break; 152 } 153 154 PUT(ic); 155 /* 156 Put the converted character into the output buffer, and decrement 157 the count of chars left in both the in and out buffers. 158 If we have no space left in the out buffer, but we have no reached 159 the end of the input buffer. We return what we have, and set the 160 errno (Error) to E2BIG. 161 */ 162 if ((oleft < 1) && (ileft > 0)) 163 { 164 errno = E2BIG; 165 retval = ERR_RETURN; 166 goto ret; 167 } 168 169 170 } 171 /* 172 We only get here if the end of the in buffer has been reached, we therefore return the 173 value 0 to denote that we have sucesfully converted the inbuffer. 174 */ 175 retval = ileft; 176 177 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */ 178 179 ret: 180 st->_st_cset = cset; 181 st->_st_stat = stat; 182 *inbuf = ip; 183 *inbytesleft = ileft; 184 ret2: 185 *outbuf = (char *)op; 186 *outbytesleft = oleft; 187 188 return (retval); 189 } 190