1 /* $NetBSD: encoding.c,v 1.7 2018/10/19 00:11:48 christos Exp $ */ 2 3 /* 4 * Copyright (c) Ian F. Darwin 1986-1995. 5 * Software written by Ian F. Darwin and others; 6 * maintained 1995-present by Christos Zoulas and others. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 /* 31 * Encoding -- determine the character encoding of a text file. 32 * 33 * Joerg Wunsch <joerg@freebsd.org> wrote the original support for 8-bit 34 * international characters. 35 */ 36 37 #include "file.h" 38 39 #ifndef lint 40 #if 0 41 FILE_RCSID("@(#)$File: encoding.c,v 1.15 2018/10/15 16:29:16 christos Exp $") 42 #else 43 __RCSID("$NetBSD: encoding.c,v 1.7 2018/10/19 00:11:48 christos Exp $"); 44 #endif 45 #endif /* lint */ 46 47 #include "magic.h" 48 #include <string.h> 49 #include <memory.h> 50 #include <stdlib.h> 51 52 53 private int looks_ascii(const unsigned char *, size_t, unichar *, size_t *); 54 private int looks_utf8_with_BOM(const unsigned char *, size_t, unichar *, 55 size_t *); 56 private int looks_utf7(const unsigned char *, size_t, unichar *, size_t *); 57 private int looks_ucs16(const unsigned char *, size_t, unichar *, size_t *); 58 private int looks_latin1(const unsigned char *, size_t, unichar *, size_t *); 59 private int looks_extended(const unsigned char *, size_t, unichar *, size_t *); 60 private void from_ebcdic(const unsigned char *, size_t, unsigned char *); 61 62 #ifdef DEBUG_ENCODING 63 #define DPRINTF(a) printf a 64 #else 65 #define DPRINTF(a) 66 #endif 67 68 /* 69 * Try to determine whether text is in some character code we can 70 * identify. Each of these tests, if it succeeds, will leave 71 * the text converted into one-unichar-per-character Unicode in 72 * ubuf, and the number of characters converted in ulen. 73 */ 74 protected int 75 file_encoding(struct magic_set *ms, const struct buffer *b, unichar **ubuf, 76 size_t *ulen, const char **code, const char **code_mime, const char **type) 77 { 78 const unsigned char *buf = CAST(const unsigned char *, b->fbuf); 79 size_t nbytes = b->flen; 80 size_t mlen; 81 int rv = 1, ucs_type; 82 unsigned char *nbuf = NULL; 83 unichar *udefbuf; 84 size_t udeflen; 85 86 if (ubuf == NULL) 87 ubuf = &udefbuf; 88 if (ulen == NULL) 89 ulen = &udeflen; 90 91 *type = "text"; 92 *ulen = 0; 93 *code = "unknown"; 94 *code_mime = "binary"; 95 96 mlen = (nbytes + 1) * sizeof((*ubuf)[0]); 97 if ((*ubuf = CAST(unichar *, calloc((size_t)1, mlen))) == NULL) { 98 file_oomem(ms, mlen); 99 goto done; 100 } 101 mlen = (nbytes + 1) * sizeof(nbuf[0]); 102 if ((nbuf = CAST(unsigned char *, calloc((size_t)1, mlen))) == NULL) { 103 file_oomem(ms, mlen); 104 goto done; 105 } 106 107 if (looks_ascii(buf, nbytes, *ubuf, ulen)) { 108 if (looks_utf7(buf, nbytes, *ubuf, ulen) > 0) { 109 DPRINTF(("utf-7 %" SIZE_T_FORMAT "u\n", *ulen)); 110 *code = "UTF-7 Unicode"; 111 *code_mime = "utf-7"; 112 } else { 113 DPRINTF(("ascii %" SIZE_T_FORMAT "u\n", *ulen)); 114 *code = "ASCII"; 115 *code_mime = "us-ascii"; 116 } 117 } else if (looks_utf8_with_BOM(buf, nbytes, *ubuf, ulen) > 0) { 118 DPRINTF(("utf8/bom %" SIZE_T_FORMAT "u\n", *ulen)); 119 *code = "UTF-8 Unicode (with BOM)"; 120 *code_mime = "utf-8"; 121 } else if (file_looks_utf8(buf, nbytes, *ubuf, ulen) > 1) { 122 DPRINTF(("utf8 %" SIZE_T_FORMAT "u\n", *ulen)); 123 *code = "UTF-8 Unicode"; 124 *code_mime = "utf-8"; 125 } else if ((ucs_type = looks_ucs16(buf, nbytes, *ubuf, ulen)) != 0) { 126 if (ucs_type == 1) { 127 *code = "Little-endian UTF-16 Unicode"; 128 *code_mime = "utf-16le"; 129 } else { 130 *code = "Big-endian UTF-16 Unicode"; 131 *code_mime = "utf-16be"; 132 } 133 DPRINTF(("ucs16 %" SIZE_T_FORMAT "u\n", *ulen)); 134 } else if (looks_latin1(buf, nbytes, *ubuf, ulen)) { 135 DPRINTF(("latin1 %" SIZE_T_FORMAT "u\n", *ulen)); 136 *code = "ISO-8859"; 137 *code_mime = "iso-8859-1"; 138 } else if (looks_extended(buf, nbytes, *ubuf, ulen)) { 139 DPRINTF(("extended %" SIZE_T_FORMAT "u\n", *ulen)); 140 *code = "Non-ISO extended-ASCII"; 141 *code_mime = "unknown-8bit"; 142 } else { 143 from_ebcdic(buf, nbytes, nbuf); 144 145 if (looks_ascii(nbuf, nbytes, *ubuf, ulen)) { 146 DPRINTF(("ebcdic %" SIZE_T_FORMAT "u\n", *ulen)); 147 *code = "EBCDIC"; 148 *code_mime = "ebcdic"; 149 } else if (looks_latin1(nbuf, nbytes, *ubuf, ulen)) { 150 DPRINTF(("ebcdic/international %" SIZE_T_FORMAT "u\n", 151 *ulen)); 152 *code = "International EBCDIC"; 153 *code_mime = "ebcdic"; 154 } else { /* Doesn't look like text at all */ 155 DPRINTF(("binary\n")); 156 rv = 0; 157 *type = "binary"; 158 } 159 } 160 161 done: 162 free(nbuf); 163 if (ubuf == &udefbuf) 164 free(udefbuf); 165 166 return rv; 167 } 168 169 /* 170 * This table reflects a particular philosophy about what constitutes 171 * "text," and there is room for disagreement about it. 172 * 173 * Version 3.31 of the file command considered a file to be ASCII if 174 * each of its characters was approved by either the isascii() or 175 * isalpha() function. On most systems, this would mean that any 176 * file consisting only of characters in the range 0x00 ... 0x7F 177 * would be called ASCII text, but many systems might reasonably 178 * consider some characters outside this range to be alphabetic, 179 * so the file command would call such characters ASCII. It might 180 * have been more accurate to call this "considered textual on the 181 * local system" than "ASCII." 182 * 183 * It considered a file to be "International language text" if each 184 * of its characters was either an ASCII printing character (according 185 * to the real ASCII standard, not the above test), a character in 186 * the range 0x80 ... 0xFF, or one of the following control characters: 187 * backspace, tab, line feed, vertical tab, form feed, carriage return, 188 * escape. No attempt was made to determine the language in which files 189 * of this type were written. 190 * 191 * 192 * The table below considers a file to be ASCII if all of its characters 193 * are either ASCII printing characters (again, according to the X3.4 194 * standard, not isascii()) or any of the following controls: bell, 195 * backspace, tab, line feed, form feed, carriage return, esc, nextline. 196 * 197 * I include bell because some programs (particularly shell scripts) 198 * use it literally, even though it is rare in normal text. I exclude 199 * vertical tab because it never seems to be used in real text. I also 200 * include, with hesitation, the X3.64/ECMA-43 control nextline (0x85), 201 * because that's what the dd EBCDIC->ASCII table maps the EBCDIC newline 202 * character to. It might be more appropriate to include it in the 8859 203 * set instead of the ASCII set, but it's got to be included in *something* 204 * we recognize or EBCDIC files aren't going to be considered textual. 205 * Some old Unix source files use SO/SI (^N/^O) to shift between Greek 206 * and Latin characters, so these should possibly be allowed. But they 207 * make a real mess on VT100-style displays if they're not paired properly, 208 * so we are probably better off not calling them text. 209 * 210 * A file is considered to be ISO-8859 text if its characters are all 211 * either ASCII, according to the above definition, or printing characters 212 * from the ISO-8859 8-bit extension, characters 0xA0 ... 0xFF. 213 * 214 * Finally, a file is considered to be international text from some other 215 * character code if its characters are all either ISO-8859 (according to 216 * the above definition) or characters in the range 0x80 ... 0x9F, which 217 * ISO-8859 considers to be control characters but the IBM PC and Macintosh 218 * consider to be printing characters. 219 */ 220 221 #define F 0 /* character never appears in text */ 222 #define T 1 /* character appears in plain ASCII text */ 223 #define I 2 /* character appears in ISO-8859 text */ 224 #define X 3 /* character appears in non-ISO extended ASCII (Mac, IBM PC) */ 225 226 private char text_chars[256] = { 227 /* BEL BS HT LF VT FF CR */ 228 F, F, F, F, F, F, F, T, T, T, T, T, T, T, F, F, /* 0x0X */ 229 /* ESC */ 230 F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */ 231 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x2X */ 232 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x3X */ 233 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x4X */ 234 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x5X */ 235 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x6X */ 236 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, F, /* 0x7X */ 237 /* NEL */ 238 X, X, X, X, X, T, X, X, X, X, X, X, X, X, X, X, /* 0x8X */ 239 X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, /* 0x9X */ 240 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xaX */ 241 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xbX */ 242 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xcX */ 243 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xdX */ 244 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xeX */ 245 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I /* 0xfX */ 246 }; 247 248 private int 249 looks_ascii(const unsigned char *buf, size_t nbytes, unichar *ubuf, 250 size_t *ulen) 251 { 252 size_t i; 253 254 *ulen = 0; 255 256 for (i = 0; i < nbytes; i++) { 257 int t = text_chars[buf[i]]; 258 259 if (t != T) 260 return 0; 261 262 ubuf[(*ulen)++] = buf[i]; 263 } 264 265 return 1; 266 } 267 268 private int 269 looks_latin1(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen) 270 { 271 size_t i; 272 273 *ulen = 0; 274 275 for (i = 0; i < nbytes; i++) { 276 int t = text_chars[buf[i]]; 277 278 if (t != T && t != I) 279 return 0; 280 281 ubuf[(*ulen)++] = buf[i]; 282 } 283 284 return 1; 285 } 286 287 private int 288 looks_extended(const unsigned char *buf, size_t nbytes, unichar *ubuf, 289 size_t *ulen) 290 { 291 size_t i; 292 293 *ulen = 0; 294 295 for (i = 0; i < nbytes; i++) { 296 int t = text_chars[buf[i]]; 297 298 if (t != T && t != I && t != X) 299 return 0; 300 301 ubuf[(*ulen)++] = buf[i]; 302 } 303 304 return 1; 305 } 306 307 /* 308 * Decide whether some text looks like UTF-8. Returns: 309 * 310 * -1: invalid UTF-8 311 * 0: uses odd control characters, so doesn't look like text 312 * 1: 7-bit text 313 * 2: definitely UTF-8 text (valid high-bit set bytes) 314 * 315 * If ubuf is non-NULL on entry, text is decoded into ubuf, *ulen; 316 * ubuf must be big enough! 317 */ 318 protected int 319 file_looks_utf8(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen) 320 { 321 size_t i; 322 int n; 323 unichar c; 324 int gotone = 0, ctrl = 0; 325 326 if (ubuf) 327 *ulen = 0; 328 329 for (i = 0; i < nbytes; i++) { 330 if ((buf[i] & 0x80) == 0) { /* 0xxxxxxx is plain ASCII */ 331 /* 332 * Even if the whole file is valid UTF-8 sequences, 333 * still reject it if it uses weird control characters. 334 */ 335 336 if (text_chars[buf[i]] != T) 337 ctrl = 1; 338 339 if (ubuf) 340 ubuf[(*ulen)++] = buf[i]; 341 } else if ((buf[i] & 0x40) == 0) { /* 10xxxxxx never 1st byte */ 342 return -1; 343 } else { /* 11xxxxxx begins UTF-8 */ 344 int following; 345 346 if ((buf[i] & 0x20) == 0) { /* 110xxxxx */ 347 c = buf[i] & 0x1f; 348 following = 1; 349 } else if ((buf[i] & 0x10) == 0) { /* 1110xxxx */ 350 c = buf[i] & 0x0f; 351 following = 2; 352 } else if ((buf[i] & 0x08) == 0) { /* 11110xxx */ 353 c = buf[i] & 0x07; 354 following = 3; 355 } else if ((buf[i] & 0x04) == 0) { /* 111110xx */ 356 c = buf[i] & 0x03; 357 following = 4; 358 } else if ((buf[i] & 0x02) == 0) { /* 1111110x */ 359 c = buf[i] & 0x01; 360 following = 5; 361 } else 362 return -1; 363 364 for (n = 0; n < following; n++) { 365 i++; 366 if (i >= nbytes) 367 goto done; 368 369 if ((buf[i] & 0x80) == 0 || (buf[i] & 0x40)) 370 return -1; 371 372 c = (c << 6) + (buf[i] & 0x3f); 373 } 374 375 if (ubuf) 376 ubuf[(*ulen)++] = c; 377 gotone = 1; 378 } 379 } 380 done: 381 return ctrl ? 0 : (gotone ? 2 : 1); 382 } 383 384 /* 385 * Decide whether some text looks like UTF-8 with BOM. If there is no 386 * BOM, return -1; otherwise return the result of looks_utf8 on the 387 * rest of the text. 388 */ 389 private int 390 looks_utf8_with_BOM(const unsigned char *buf, size_t nbytes, unichar *ubuf, 391 size_t *ulen) 392 { 393 if (nbytes > 3 && buf[0] == 0xef && buf[1] == 0xbb && buf[2] == 0xbf) 394 return file_looks_utf8(buf + 3, nbytes - 3, ubuf, ulen); 395 else 396 return -1; 397 } 398 399 private int 400 looks_utf7(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen) 401 { 402 if (nbytes > 4 && buf[0] == '+' && buf[1] == '/' && buf[2] == 'v') 403 switch (buf[3]) { 404 case '8': 405 case '9': 406 case '+': 407 case '/': 408 if (ubuf) 409 *ulen = 0; 410 return 1; 411 default: 412 return -1; 413 } 414 else 415 return -1; 416 } 417 418 private int 419 looks_ucs16(const unsigned char *buf, size_t nbytes, unichar *ubuf, 420 size_t *ulen) 421 { 422 int bigend; 423 size_t i; 424 425 if (nbytes < 2) 426 return 0; 427 428 if (buf[0] == 0xff && buf[1] == 0xfe) 429 bigend = 0; 430 else if (buf[0] == 0xfe && buf[1] == 0xff) 431 bigend = 1; 432 else 433 return 0; 434 435 *ulen = 0; 436 437 for (i = 2; i + 1 < nbytes; i += 2) { 438 /* XXX fix to properly handle chars > 65536 */ 439 440 if (bigend) 441 ubuf[(*ulen)++] = buf[i + 1] + 256 * buf[i]; 442 else 443 ubuf[(*ulen)++] = buf[i] + 256 * buf[i + 1]; 444 445 if (ubuf[*ulen - 1] == 0xfffe) 446 return 0; 447 if (ubuf[*ulen - 1] < 128 && 448 text_chars[(size_t)ubuf[*ulen - 1]] != T) 449 return 0; 450 } 451 452 return 1 + bigend; 453 } 454 455 #undef F 456 #undef T 457 #undef I 458 #undef X 459 460 /* 461 * This table maps each EBCDIC character to an (8-bit extended) ASCII 462 * character, as specified in the rationale for the dd(1) command in 463 * draft 11.2 (September, 1991) of the POSIX P1003.2 standard. 464 * 465 * Unfortunately it does not seem to correspond exactly to any of the 466 * five variants of EBCDIC documented in IBM's _Enterprise Systems 467 * Architecture/390: Principles of Operation_, SA22-7201-06, Seventh 468 * Edition, July, 1999, pp. I-1 - I-4. 469 * 470 * Fortunately, though, all versions of EBCDIC, including this one, agree 471 * on most of the printing characters that also appear in (7-bit) ASCII. 472 * Of these, only '|', '!', '~', '^', '[', and ']' are in question at all. 473 * 474 * Fortunately too, there is general agreement that codes 0x00 through 475 * 0x3F represent control characters, 0x41 a nonbreaking space, and the 476 * remainder printing characters. 477 * 478 * This is sufficient to allow us to identify EBCDIC text and to distinguish 479 * between old-style and internationalized examples of text. 480 */ 481 482 private unsigned char ebcdic_to_ascii[] = { 483 0, 1, 2, 3, 156, 9, 134, 127, 151, 141, 142, 11, 12, 13, 14, 15, 484 16, 17, 18, 19, 157, 133, 8, 135, 24, 25, 146, 143, 28, 29, 30, 31, 485 128, 129, 130, 131, 132, 10, 23, 27, 136, 137, 138, 139, 140, 5, 6, 7, 486 144, 145, 22, 147, 148, 149, 150, 4, 152, 153, 154, 155, 20, 21, 158, 26, 487 ' ', 160, 161, 162, 163, 164, 165, 166, 167, 168, 213, '.', '<', '(', '+', '|', 488 '&', 169, 170, 171, 172, 173, 174, 175, 176, 177, '!', '$', '*', ')', ';', '~', 489 '-', '/', 178, 179, 180, 181, 182, 183, 184, 185, 203, ',', '%', '_', '>', '?', 490 186, 187, 188, 189, 190, 191, 192, 193, 194, '`', ':', '#', '@', '\'','=', '"', 491 195, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 196, 197, 198, 199, 200, 201, 492 202, 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', '^', 204, 205, 206, 207, 208, 493 209, 229, 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 210, 211, 212, '[', 214, 215, 494 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, ']', 230, 231, 495 '{', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 232, 233, 234, 235, 236, 237, 496 '}', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 238, 239, 240, 241, 242, 243, 497 '\\',159, 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 244, 245, 246, 247, 248, 249, 498 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 250, 251, 252, 253, 254, 255 499 }; 500 501 #ifdef notdef 502 /* 503 * The following EBCDIC-to-ASCII table may relate more closely to reality, 504 * or at least to modern reality. It comes from 505 * 506 * http://ftp.s390.ibm.com/products/oe/bpxqp9.html 507 * 508 * and maps the characters of EBCDIC code page 1047 (the code used for 509 * Unix-derived software on IBM's 390 systems) to the corresponding 510 * characters from ISO 8859-1. 511 * 512 * If this table is used instead of the above one, some of the special 513 * cases for the NEL character can be taken out of the code. 514 */ 515 516 private unsigned char ebcdic_1047_to_8859[] = { 517 0x00,0x01,0x02,0x03,0x9C,0x09,0x86,0x7F,0x97,0x8D,0x8E,0x0B,0x0C,0x0D,0x0E,0x0F, 518 0x10,0x11,0x12,0x13,0x9D,0x0A,0x08,0x87,0x18,0x19,0x92,0x8F,0x1C,0x1D,0x1E,0x1F, 519 0x80,0x81,0x82,0x83,0x84,0x85,0x17,0x1B,0x88,0x89,0x8A,0x8B,0x8C,0x05,0x06,0x07, 520 0x90,0x91,0x16,0x93,0x94,0x95,0x96,0x04,0x98,0x99,0x9A,0x9B,0x14,0x15,0x9E,0x1A, 521 0x20,0xA0,0xE2,0xE4,0xE0,0xE1,0xE3,0xE5,0xE7,0xF1,0xA2,0x2E,0x3C,0x28,0x2B,0x7C, 522 0x26,0xE9,0xEA,0xEB,0xE8,0xED,0xEE,0xEF,0xEC,0xDF,0x21,0x24,0x2A,0x29,0x3B,0x5E, 523 0x2D,0x2F,0xC2,0xC4,0xC0,0xC1,0xC3,0xC5,0xC7,0xD1,0xA6,0x2C,0x25,0x5F,0x3E,0x3F, 524 0xF8,0xC9,0xCA,0xCB,0xC8,0xCD,0xCE,0xCF,0xCC,0x60,0x3A,0x23,0x40,0x27,0x3D,0x22, 525 0xD8,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0xAB,0xBB,0xF0,0xFD,0xFE,0xB1, 526 0xB0,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0xAA,0xBA,0xE6,0xB8,0xC6,0xA4, 527 0xB5,0x7E,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0xA1,0xBF,0xD0,0x5B,0xDE,0xAE, 528 0xAC,0xA3,0xA5,0xB7,0xA9,0xA7,0xB6,0xBC,0xBD,0xBE,0xDD,0xA8,0xAF,0x5D,0xB4,0xD7, 529 0x7B,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0xAD,0xF4,0xF6,0xF2,0xF3,0xF5, 530 0x7D,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50,0x51,0x52,0xB9,0xFB,0xFC,0xF9,0xFA,0xFF, 531 0x5C,0xF7,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0xB2,0xD4,0xD6,0xD2,0xD3,0xD5, 532 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0xB3,0xDB,0xDC,0xD9,0xDA,0x9F 533 }; 534 #endif 535 536 /* 537 * Copy buf[0 ... nbytes-1] into out[], translating EBCDIC to ASCII. 538 */ 539 private void 540 from_ebcdic(const unsigned char *buf, size_t nbytes, unsigned char *out) 541 { 542 size_t i; 543 544 for (i = 0; i < nbytes; i++) { 545 out[i] = ebcdic_to_ascii[buf[i]]; 546 } 547 } 548