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 #include "table.ib2.dhn.c" 32 33 /* 34 * struct _cv_state; to keep status 35 */ 36 struct _icv_state { 37 int _st_cset; 38 int _st_stat; 39 }; 40 41 extern int errno; 42 43 /* 44 * Open; called from iconv_open(); as taken unchanged from @(#)ISO-2022-JP%SJIS. 45 */ 46 void * 47 _icv_open() 48 { 49 struct _icv_state *st; 50 51 if ((st = (struct _icv_state *)malloc(sizeof(struct _icv_state))) 52 == NULL) 53 return ((void *)ERR_RETURN); 54 55 st->_st_cset = CS_0; 56 st->_st_stat = ST_INIT; 57 58 return (st); 59 } 60 61 62 /* 63 * Close; called from iconv_close(); as taken unchanged from @(#)ISO-2022-JP%SJIS. 64 */ 65 void 66 _icv_close(struct _icv_state *st) 67 { 68 free(st); 69 } 70 71 72 73 /* 74 * Actual conversion; called from iconv() 75 */ 76 size_t 77 _icv_iconv(struct _icv_state *st, char **inbuf, size_t *inbytesleft, 78 char **outbuf, size_t *outbytesleft) 79 { 80 int cset, stat; 81 unsigned char *op, ic; 82 char *ip; 83 size_t ileft, oleft; 84 size_t retval; 85 86 cset = st->_st_cset; 87 stat = st->_st_stat; 88 89 if ((inbuf == 0) || (*inbuf == 0)) { 90 cset = CS_0; 91 stat = ST_INIT; 92 op = (unsigned char *)*outbuf; 93 oleft = *outbytesleft; 94 retval = 0; 95 goto ret2; 96 } 97 98 ip = *inbuf; 99 op = (unsigned char *)*outbuf; 100 ileft = *inbytesleft; 101 oleft = *outbytesleft; 102 103 /* Everything down to here was taken unchanged from @(#)ISO-2022-JP%SJIS. 104 ======================================================================= 105 106 * 107 * Main loop; basically 1 loop per 1 input byte 108 */ 109 110 while (ileft > 0) 111 { 112 GET(ic); 113 /* 114 If the char is one of the following [ / ] { | } then convert 115 it to its corresponding value. In all other cases if the char 116 is greater than octal \178 ( ie a high bit char) convert it 117 to an underscore (_), as it has no mapping to 7 bit ASCII. 118 Otrherwise the char is the same in both cose sets. 119 */ 120 ic=__ib2_to_dhn[ic]; 121 122 123 PUT(ic); 124 /* 125 Put the converted character into the output buffer, and decrement 126 the count of chars left in both the in and out buffers. 127 If we have no space left in the out buffer, but we have no reached 128 the end of the input buffer. We return what we have, and set the 129 errno (Error) to E2BIG. 130 */ 131 if ((oleft < 1) && (ileft > 0)) 132 { 133 errno = E2BIG; 134 retval = ERR_RETURN; 135 goto ret; 136 } 137 138 139 } 140 /* 141 We only get here if the end of the in buffer has been reached, we therefore return the 142 value 0 to denote that we have sucesfully converted the inbuffer. 143 */ 144 retval = ileft; 145 146 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */ 147 148 ret: 149 st->_st_cset = cset; 150 st->_st_stat = stat; 151 *inbuf = ip; 152 *inbytesleft = ileft; 153 ret2: 154 *outbuf = (char *)op; 155 *outbytesleft = oleft; 156 157 return (retval); 158 } 159