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 2004 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * This particular file is to cover conversions from various UCS formats, 26 * especially, UCS-2, UCS-2BE, UCS-2LE, UTF-16, UTF-16BE, and, UTF-16LE to 27 * another various UCS formats, UCS-4, UCS-4BE, UCS-4LE, UTF-32, UTF-32BE, 28 * and, UTF-32LE. 29 */ 30 31 32 #include <stdlib.h> 33 #include <errno.h> 34 #include <sys/types.h> 35 #include <sys/isa_defs.h> 36 #include "ucs_to_ucs4.h" 37 38 39 void * 40 _icv_open() 41 { 42 ucs_ucs_state_t *cd; 43 44 cd = (ucs_ucs_state_t *)calloc(1, sizeof(ucs_ucs_state_t)); 45 if (cd == (ucs_ucs_state_t *)NULL) { 46 errno = ENOMEM; 47 return((void *)-1); 48 } 49 50 #if defined(UTF_16BE) || defined(UCS_2BE) 51 cd->input.little_endian = false; 52 cd->input.bom_written = true; 53 #elif defined(UTF_16LE) || defined(UCS_2LE) 54 cd->input.little_endian = true; 55 cd->input.bom_written = true; 56 #elif defined(_LITTLE_ENDIAN) 57 cd->input.little_endian = true; 58 #endif 59 60 #if defined(UCS_4BE) || defined(UTF_32BE) 61 cd->output.little_endian = false; 62 cd->output.bom_written = true; 63 #elif defined(UCS_4LE) || defined(UTF_32LE) 64 cd->output.little_endian = true; 65 cd->output.bom_written = true; 66 #elif defined(_LITTLE_ENDIAN) 67 cd->output.little_endian = true; 68 #endif 69 70 return((void *)cd); 71 } 72 73 74 void 75 _icv_close(ucs_ucs_state_t *cd) 76 { 77 if (! cd) 78 errno = EBADF; 79 else 80 free((void *)cd); 81 } 82 83 84 size_t 85 _icv_iconv(ucs_ucs_state_t *cd, char **inbuf, size_t *inbufleft, char **outbuf, 86 size_t *outbufleft) 87 { 88 size_t ret_val = 0; 89 uchar_t *ib; 90 uchar_t *ob; 91 uchar_t *ibtail; 92 uchar_t *obtail; 93 uint_t u4; 94 uint_t u4_2; 95 register int i; 96 97 if (! cd) { 98 errno = EBADF; 99 return((size_t)-1); 100 } 101 102 if (!inbuf || !(*inbuf)) { 103 #if defined(UCS_2) || defined(UTF_16) 104 cd->input.bom_written = false; 105 #endif 106 #if defined(UCS_4) || defined(UTF_32) 107 cd->output.bom_written = false; 108 #endif 109 return((size_t)0); 110 } 111 112 ib = (uchar_t *)*inbuf; 113 ob = (uchar_t *)*outbuf; 114 ibtail = ib + *inbufleft; 115 obtail = ob + *outbufleft; 116 117 #if defined(UCS_2) || defined(UTF_16) 118 if (! cd->input.bom_written) { 119 if ((ibtail - ib) < ICV_FETCH_UCS_SIZE) { 120 errno = EINVAL; 121 ret_val = (size_t)-1; 122 goto need_more_input_err; 123 } 124 125 for (u4 = 0, i = 0; i < ICV_FETCH_UCS_SIZE; i++) 126 u4 = (u4 << 8) | ((uint_t)(*(ib + i))); 127 128 if (u4 == ICV_BOM_IN_BIG_ENDIAN) { 129 ib += ICV_FETCH_UCS_SIZE; 130 cd->input.little_endian = false; 131 } else if (u4 == ICV_BOM_IN_LITTLE_ENDIAN) { 132 ib += ICV_FETCH_UCS_SIZE; 133 cd->input.little_endian = true; 134 } 135 } 136 cd->input.bom_written = true; 137 #endif 138 139 while (ib < ibtail) { 140 if ((ibtail - ib) < ICV_FETCH_UCS_SIZE) { 141 errno = EINVAL; 142 ret_val = (size_t)-1; 143 break; 144 } 145 146 u4 = u4_2 = 0; 147 if (cd->input.little_endian) { 148 for (i = ICV_FETCH_UCS_SIZE - 1; i >= 0; i--) 149 u4 = (u4 << 8) | ((uint_t)(*(ib + i))); 150 } else { 151 for (i = 0; i < ICV_FETCH_UCS_SIZE; i++) 152 u4 = (u4 << 8) | ((uint_t)(*(ib + i))); 153 } 154 155 #if defined(UTF_16) || defined(UTF_16BE) || defined(UTF_16LE) 156 if ((u4 >= 0x00dc00 && u4 <= 0x00dfff) || u4 >= 0x00fffe) { 157 errno = EILSEQ; 158 ret_val = (size_t)-1; 159 break; 160 } 161 162 if (u4 >= 0x00d800 && u4 <= 0x00dbff) { 163 if ((ibtail - ib) < ICV_FETCH_UCS_SIZE_TWO) { 164 errno = EINVAL; 165 ret_val = (size_t)-1; 166 break; 167 } 168 169 if (cd->input.little_endian) { 170 for (i = ICV_FETCH_UCS_SIZE_TWO - 1; 171 i >= ICV_FETCH_UCS_SIZE; 172 i--) 173 u4_2 = (u4_2<<8)|((uint_t)(*(ib + i))); 174 } else { 175 for (i = ICV_FETCH_UCS_SIZE; 176 i < ICV_FETCH_UCS_SIZE_TWO; 177 i++) 178 u4_2 = (u4_2<<8)|((uint_t)(*(ib + i))); 179 } 180 181 if (u4_2 < 0x00dc00 || u4_2 > 0x00dfff) { 182 errno = EILSEQ; 183 ret_val = (size_t)-1; 184 break; 185 } 186 187 u4 = ((((u4 - 0x00d800) * 0x400) + 188 (u4_2 - 0x00dc00)) & 0x0fffff) + 0x010000; 189 } 190 #elif defined(UCS_2) || defined(UCS_2BE) || defined(UCS_2LE) 191 if (u4 >= 0x00fffe || (u4 >= 0x00d800 && u4 <= 0x00dfff)) { 192 errno = EILSEQ; 193 ret_val = (size_t)-1; 194 break; 195 } 196 #elif defined(UCS_4) || defined(UCS_4BE) || defined(UCS_4LE) || \ 197 defined(UTF_32) || defined(UTF_32BE) || defined(UTF_32LE) 198 /* 199 * We do nothing here since these if expressions are 200 * only for input characters particularly of 201 * UCS-2, UCS-2BE, UCS-2LE, UTF-16, UTF-16BE, and 202 * UTF-16LE. 203 */ 204 #else 205 #error "Fatal: one of the UCS macros need to be defined." 206 #endif 207 208 if ((obtail - ob) < ((cd->output.bom_written) ? 4 : 8)) { 209 errno = E2BIG; 210 ret_val = (size_t)-1; 211 break; 212 } 213 214 if (cd->output.little_endian) { 215 if (! cd->output.bom_written) { 216 *ob++ = (uchar_t)0xff; 217 *ob++ = (uchar_t)0xfe; 218 *(ushort_t *)ob = (ushort_t)0; 219 ob += 2; 220 cd->output.bom_written = true; 221 } 222 *ob++ = (uchar_t)(u4 & 0xff); 223 *ob++ = (uchar_t)((u4 >> 8) & 0xff); 224 *ob++ = (uchar_t)((u4 >> 16) & 0xff); 225 *ob++ = (uchar_t)((u4 >> 24) & 0xff); 226 } else { 227 if (! cd->output.bom_written) { 228 *(ushort_t *)ob = (ushort_t)0; 229 ob += 2; 230 *ob++ = (uchar_t)0xfe; 231 *ob++ = (uchar_t)0xff; 232 cd->output.bom_written = true; 233 } 234 *ob++ = (uchar_t)((u4 >> 24) & 0xff); 235 *ob++ = (uchar_t)((u4 >> 16) & 0xff); 236 *ob++ = (uchar_t)((u4 >> 8) & 0xff); 237 *ob++ = (uchar_t)(u4 & 0xff); 238 } 239 ib += ((u4_2) ? ICV_FETCH_UCS_SIZE_TWO : ICV_FETCH_UCS_SIZE); 240 } 241 242 #if defined(UCS_2) || defined(UTF_16) 243 need_more_input_err: 244 #endif 245 *inbuf = (char *)ib; 246 *inbufleft = ibtail - ib; 247 *outbuf = (char *)ob; 248 *outbufleft = obtail - ob; 249 250 return(ret_val); 251 } 252