| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright (c) 1997, by Sun Microsystems, Inc. |
| * All rights reserved. |
| */ |
| |
| |
| /* |
| Converts From: ISO2022-CN-EXT encoding. |
| Converts To: Taiwanese BIG5 encoding |
| */ |
| |
| #include "iso2022-cn.h" |
| #include "cns11643_big5.h" |
| #include "gb2312_big5_TW.h" |
| |
| /* Forward reference the functions constrained to the scope of this file */ |
| static int chinese_to_big5( _iconv_st *, unsigned char **, size_t *, int); |
| static int gb_to_big5( _iconv_st*, unsigned char**, size_t* ); |
| |
| extern int errno; |
| |
| size_t |
| _icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft, |
| char **outbuf, size_t *outbytesleft) |
| { |
| return iso2022_icv_iconv(st, inbuf, inbytesleft, (unsigned char**) outbuf, outbytesleft, |
| chinese_to_big5); |
| } |
| |
| static int |
| cns_big5_comp(const void *p1, const void *p2) |
| { |
| table_t *ptr1 = (table_t*) p1, *ptr2 = (table_t*) p2; |
| long result = ptr1->key - ptr2->key; |
| return result == 0 ? 0 : result > 0 ? 1 : -1; |
| } |
| |
| static int |
| chinese_to_big5( _iconv_st *st, unsigned char **outbuf, size_t *outbytesleft, int plane_no ) |
| { |
| |
| table_t key, *ptr; |
| if ( st->SSfunc == NONE && st->SOcharset == 'A') { /* GB2312 */ |
| return gb_to_big5(st, outbuf, outbytesleft); |
| } |
| |
| if ( plane_no < 0 || plane_no > 2 )/* Not a big5 */ |
| return (1); |
| |
| key.key = (unsigned long) ((st->keepc[0] & 0xff) << 8) + (st->keepc[1] & 0xff); |
| if (plane_no == 1) |
| ptr = (table_t*) bsearch(&key, cns_big5_tab1, MAX_CNS1_NUM, sizeof(table_t), cns_big5_comp); |
| else |
| ptr = (table_t*) bsearch(&key, cns_big5_tab2, MAX_CNS2_NUM, sizeof(table_t), cns_big5_comp); |
| |
| if ( ptr == 0 || ptr->value == 0 ) |
| return (1); /* No BIG5 code for this CNS code */ |
| |
| if ( *outbytesleft < 2 ){ |
| st->_errno = errno = E2BIG; |
| return (-1); |
| } |
| *(*outbuf)++ = (unsigned char) ((ptr->value >> 8) & 0xff); |
| *(*outbuf)++ = (unsigned char) (ptr->value & 0xff); |
| (*outbytesleft) -= 2; |
| |
| return (0); |
| } |
| |
| |
| static int |
| gb_big5_comp(const void *p1, const void *p2) |
| { |
| gb_big5 *ptr1 = (gb_big5*) p1, *ptr2 = (gb_big5*) p2; |
| long result = ptr1->gbcode - ptr2->gbcode; |
| return result == 0 ? 0 : result > 0 ? 1 : -1; |
| } |
| |
| static int |
| gb_to_big5( _iconv_st *st, unsigned char **outbuf, size_t *outbytesleft ) |
| { |
| gb_big5 *ptr, key; |
| |
| key.gbcode = (unsigned long) ((st->keepc[0] | MSB) << 8) + (st->keepc[1] | MSB); |
| ptr = (gb_big5*) bsearch(&key, gb_big5_tab, BIG5MAX, sizeof(gb_big5), gb_big5_comp); |
| |
| if ( ptr && ptr->big5code > 0 ) { |
| if ( *outbytesleft < 2 ){ |
| st->_errno = errno = E2BIG; |
| return (-1); |
| } |
| *(*outbuf)++ = (unsigned char) ((ptr->big5code >> 8) & 0xff); |
| *(*outbuf)++ = (unsigned char) (ptr->big5code & 0xff); |
| (*outbytesleft) -= 2; |
| |
| return (0); |
| } |
| else |
| return (1); /* No BIG5 code for this CNS code */ |
| } |