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; 104 105 oleft = *outbytesleft; 106 /* Everything down to here was taken unchanged from @(#)ISO-2022-JP%SJIS. 107 ======================================================================= 108 109 * 110 * Main loop; basically 1 loop per 1 input byte 111 */ 112 113 while (ileft > 0) 114 { 115 GET(ic); 116 /* 117 If the char is one of the following [ / ] { | } then convert 118 it to its corresponding value. In all other cases if the char 119 is greater than octal \178 ( ie a high bit char) convert it 120 to an underscore (_), as it has no mapping to 7 bit ASCII. 121 Otrherwise the char is the same in both cose sets. 122 */ 123 if (ic > '\177') 124 ic = '_'; 125 /* break; */ 126 127 PUT(ic); 128 /* 129 Put the converted character into the output buffer, and decrement 130 the count of chars left in both the in and out buffers. 131 If we have no space left in the out buffer, but we have no reached 132 the end of the input buffer. We return what we have, and set the 133 errno (Error) to E2BIG. 134 */ 135 if ((oleft < 1) && (ileft > 0)) 136 { 137 errno = E2BIG; 138 retval = ERR_RETURN; 139 goto ret; 140 } 141 142 143 } 144 /* 145 We only get here if the end of the in buffer has been reached, we therefore return the 146 value 0 to denote that we have sucesfully converted the inbuffer. 147 */ 148 retval = ileft; 149 150 /* Taken unchanged from @(#)ISO-2022-JP%SJIS. */ 151 152 ret: 153 st->_st_cset = cset; 154 st->_st_stat = stat; 155 *inbuf = ip; 156 *inbytesleft = ileft; 157 ret2: 158 *outbuf = (char *)op; 159 *outbytesleft = oleft; 160 161 return (retval); 162 } 163