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) 1996 by Sun Microsystems, Inc. 23 */ 24 25 26 #include <errno.h> 27 #include <widec.h> 28 #include "common_def.h" 29 #include "common_han.h" 30 #include "utf_njh_api.h" 31 #include "common_defs.h" 32 33 /**** _ I C V _ O P E N ****/ 34 35 void* _icv_open() 36 { 37 return((void*)MAGIC_NUMBER); 38 } /* end of int _icv_open(). */ 39 40 41 /**** _ I C V _ C L O S E ****/ 42 43 void _icv_close(int* cd) 44 { 45 if (!cd || cd != (int*)MAGIC_NUMBER) 46 errno = EBADF; 47 } /* end of void _icv_close(int*). */ 48 49 50 /**** _ I C V _ I C O N V ****/ 51 52 size_t _icv_iconv(int* cd, char** inbuf, size_t* inbufleft, 53 char** outbuf, size_t* outbufleft) 54 { 55 size_t ret_val = 0; 56 unsigned char* ib; 57 unsigned char* ob; 58 unsigned char* ibtail; 59 unsigned char* obtail; 60 61 if (!cd || cd != (int*)MAGIC_NUMBER) 62 { 63 errno = EBADF; 64 return((size_t)-1); 65 } 66 67 if (!inbuf || !(*inbuf)) 68 return((size_t)0); 69 70 ib = (unsigned char*)*inbuf; 71 ob = (unsigned char*)*outbuf; 72 ibtail = ib + *inbufleft; 73 obtail = ob + *outbufleft; 74 75 while (ib < ibtail) 76 { 77 if (!(*ib & 0x80)) /* 7 bits */ 78 { 79 if (ob >= obtail) 80 { 81 errno = E2BIG; 82 ret_val = (size_t)-1; 83 break; 84 } 85 *ob++ = *ib++; 86 } 87 else if ((*ib & 0xF0) == 0xE0) /* 16 bits */ 88 { 89 hcode_type utf8_code, njh_code; 90 91 if ((ibtail - ib) < 3) 92 { 93 errno = EINVAL; 94 ret_val = (size_t)-1; 95 break; 96 } 97 98 if (!is_valid_utf8_string(ib, 3)) 99 { 100 errno = EILSEQ; 101 ret_val = (size_t)-1; 102 break; 103 } 104 105 utf8_code.byte.byte1 = 0; 106 utf8_code.byte.byte2 = *ib; 107 utf8_code.byte.byte3 = *(ib + 1); 108 utf8_code.byte.byte4 = *(ib + 2); 109 110 njh_code = _utf8_to_johap92(utf8_code); 111 112 if (njh_code.code != 0) { 113 /* If find something -> Johap92 code */ 114 *ob++ = njh_code.byte.byte3; 115 *ob++ = njh_code.byte.byte4; 116 } 117 else 118 { 119 /* Let's assume the code is non-identical. */ 120 if ((obtail - ob) < 2) 121 { 122 errno = E2BIG; 123 ret_val = (size_t)-1; 124 break; 125 } 126 *ob++ = NON_IDENTICAL; 127 *ob++ = NON_IDENTICAL; 128 ret_val += 2; 129 } 130 ib += 3; 131 } 132 else /* 11, 21, 26 & 31 bits codes won't be able to convert. */ 133 { 134 short int offset; 135 136 if ((*ib & 0xE0) == 0xC0) /* 11 */ 137 offset = 2; 138 else if ((*ib & 0xF0) == 0xE0) /* 16 */ 139 offset = 3; 140 else if ((*ib & 0xF8) == 0xF0) /* 21 */ 141 offset = 4; 142 else if ((*ib & 0xFC) == 0xF8) /* 26 */ 143 offset = 5; 144 else if ((*ib & 0xFE) == 0xFC) /* 31 */ 145 offset = 6; 146 else /* Illegal sequence. */ 147 offset = 1; 148 149 if ((ibtail - ib) < offset) 150 { 151 errno = EINVAL; 152 ret_val = (size_t)-1; 153 break; 154 } 155 156 if (!is_valid_utf8_string(ib, offset)) 157 { 158 errno = EILSEQ; 159 ret_val = (size_t)-1; 160 break; 161 } 162 163 ib += offset; 164 165 /* Let's assume the code is non-identical. */ 166 offset = (offset > 2) ? 2 : 1; 167 if ((obtail - ob) < offset) 168 { 169 errno = E2BIG; 170 ret_val = (size_t)-1; 171 break; 172 } 173 *ob++ = NON_IDENTICAL; 174 if (offset > 1) 175 *ob++ = NON_IDENTICAL; 176 ret_val += offset; 177 } 178 } 179 180 *inbuf = (char*)ib; 181 *inbufleft = ibtail - ib; 182 *outbuf = (char*)ob; 183 *outbufleft = obtail - ob; 184 185 return(ret_val); 186 } /* end of size_t _icv_iconv(int*, char**, size_t*, char**, size_t*).*/ 187