1 /*
2 * Copyright (c) Ian F. Darwin 1986-1995.
3 * Software written by Ian F. Darwin and others;
4 * maintained 1995-present by Christos Zoulas and others.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice immediately at the beginning of the file, without modification,
11 * this list of conditions, and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * Encoding -- determine the character encoding of a text file.
30 *
31 * Joerg Wunsch <joerg@freebsd.org> wrote the original support for 8-bit
32 * international characters.
33 */
34
35 #include "file.h"
36
37 #ifndef lint
38 FILE_RCSID("@(#)$File: encoding.c,v 1.14 2017/11/02 20:25:39 christos Exp $")
39 #endif /* lint */
40
41 #include "magic.h"
42 #include <string.h>
43 #include <memory.h>
44 #include <stdlib.h>
45
46
47 private int looks_ascii(const unsigned char *, size_t, unichar *, size_t *);
48 private int looks_utf8_with_BOM(const unsigned char *, size_t, unichar *,
49 size_t *);
50 private int looks_utf7(const unsigned char *, size_t, unichar *, size_t *);
51 private int looks_ucs16(const unsigned char *, size_t, unichar *, size_t *);
52 private int looks_latin1(const unsigned char *, size_t, unichar *, size_t *);
53 private int looks_extended(const unsigned char *, size_t, unichar *, size_t *);
54 private void from_ebcdic(const unsigned char *, size_t, unsigned char *);
55
56 #ifdef DEBUG_ENCODING
57 #define DPRINTF(a) printf a
58 #else
59 #define DPRINTF(a)
60 #endif
61
62 /*
63 * Try to determine whether text is in some character code we can
64 * identify. Each of these tests, if it succeeds, will leave
65 * the text converted into one-unichar-per-character Unicode in
66 * ubuf, and the number of characters converted in ulen.
67 */
68 protected int
file_encoding(struct magic_set * ms,const struct buffer * b,unichar ** ubuf,size_t * ulen,const char ** code,const char ** code_mime,const char ** type)69 file_encoding(struct magic_set *ms, const struct buffer *b, unichar **ubuf,
70 size_t *ulen, const char **code, const char **code_mime, const char **type)
71 {
72 const unsigned char *buf = b->fbuf;
73 size_t nbytes = b->flen;
74 size_t mlen;
75 int rv = 1, ucs_type;
76 unsigned char *nbuf = NULL;
77 unichar *udefbuf;
78 size_t udeflen;
79
80 if (ubuf == NULL)
81 ubuf = &udefbuf;
82 if (ulen == NULL)
83 ulen = &udeflen;
84
85 *type = "text";
86 *ulen = 0;
87 *code = "unknown";
88 *code_mime = "binary";
89
90 mlen = (nbytes + 1) * sizeof((*ubuf)[0]);
91 if ((*ubuf = CAST(unichar *, ecalloc((size_t)1, mlen))) == NULL) {
92 file_oomem(ms, mlen);
93 goto done;
94 }
95 mlen = (nbytes + 1) * sizeof(nbuf[0]);
96 if ((nbuf = CAST(unsigned char *, ecalloc((size_t)1, mlen))) == NULL) {
97 file_oomem(ms, mlen);
98 goto done;
99 }
100
101 if (looks_ascii(buf, nbytes, *ubuf, ulen)) {
102 if (looks_utf7(buf, nbytes, *ubuf, ulen) > 0) {
103 DPRINTF(("utf-7 %" SIZE_T_FORMAT "u\n", *ulen));
104 *code = "UTF-7 Unicode";
105 *code_mime = "utf-7";
106 } else {
107 DPRINTF(("ascii %" SIZE_T_FORMAT "u\n", *ulen));
108 *code = "ASCII";
109 *code_mime = "us-ascii";
110 }
111 } else if (looks_utf8_with_BOM(buf, nbytes, *ubuf, ulen) > 0) {
112 DPRINTF(("utf8/bom %" SIZE_T_FORMAT "u\n", *ulen));
113 *code = "UTF-8 Unicode (with BOM)";
114 *code_mime = "utf-8";
115 } else if (file_looks_utf8(buf, nbytes, *ubuf, ulen) > 1) {
116 DPRINTF(("utf8 %" SIZE_T_FORMAT "u\n", *ulen));
117 *code = "UTF-8 Unicode";
118 *code_mime = "utf-8";
119 } else if ((ucs_type = looks_ucs16(buf, nbytes, *ubuf, ulen)) != 0) {
120 if (ucs_type == 1) {
121 *code = "Little-endian UTF-16 Unicode";
122 *code_mime = "utf-16le";
123 } else {
124 *code = "Big-endian UTF-16 Unicode";
125 *code_mime = "utf-16be";
126 }
127 DPRINTF(("ucs16 %" SIZE_T_FORMAT "u\n", *ulen));
128 } else if (looks_latin1(buf, nbytes, *ubuf, ulen)) {
129 DPRINTF(("latin1 %" SIZE_T_FORMAT "u\n", *ulen));
130 *code = "ISO-8859";
131 *code_mime = "iso-8859-1";
132 } else if (looks_extended(buf, nbytes, *ubuf, ulen)) {
133 DPRINTF(("extended %" SIZE_T_FORMAT "u\n", *ulen));
134 *code = "Non-ISO extended-ASCII";
135 *code_mime = "unknown-8bit";
136 } else {
137 from_ebcdic(buf, nbytes, nbuf);
138
139 if (looks_ascii(nbuf, nbytes, *ubuf, ulen)) {
140 DPRINTF(("ebcdic %" SIZE_T_FORMAT "u\n", *ulen));
141 *code = "EBCDIC";
142 *code_mime = "ebcdic";
143 } else if (looks_latin1(nbuf, nbytes, *ubuf, ulen)) {
144 DPRINTF(("ebcdic/international %" SIZE_T_FORMAT "u\n",
145 *ulen));
146 *code = "International EBCDIC";
147 *code_mime = "ebcdic";
148 } else { /* Doesn't look like text at all */
149 DPRINTF(("binary\n"));
150 rv = 0;
151 *type = "binary";
152 }
153 }
154
155 done:
156 efree(nbuf);
157 if (ubuf == &udefbuf)
158 efree(udefbuf);
159
160 return rv;
161 }
162
163 /*
164 * This table reflects a particular philosophy about what constitutes
165 * "text," and there is room for disagreement about it.
166 *
167 * Version 3.31 of the file command considered a file to be ASCII if
168 * each of its characters was approved by either the isascii() or
169 * isalpha() function. On most systems, this would mean that any
170 * file consisting only of characters in the range 0x00 ... 0x7F
171 * would be called ASCII text, but many systems might reasonably
172 * consider some characters outside this range to be alphabetic,
173 * so the file command would call such characters ASCII. It might
174 * have been more accurate to call this "considered textual on the
175 * local system" than "ASCII."
176 *
177 * It considered a file to be "International language text" if each
178 * of its characters was either an ASCII printing character (according
179 * to the real ASCII standard, not the above test), a character in
180 * the range 0x80 ... 0xFF, or one of the following control characters:
181 * backspace, tab, line feed, vertical tab, form feed, carriage return,
182 * escape. No attempt was made to determine the language in which files
183 * of this type were written.
184 *
185 *
186 * The table below considers a file to be ASCII if all of its characters
187 * are either ASCII printing characters (again, according to the X3.4
188 * standard, not isascii()) or any of the following controls: bell,
189 * backspace, tab, line feed, form feed, carriage return, esc, nextline.
190 *
191 * I include bell because some programs (particularly shell scripts)
192 * use it literally, even though it is rare in normal text. I exclude
193 * vertical tab because it never seems to be used in real text. I also
194 * include, with hesitation, the X3.64/ECMA-43 control nextline (0x85),
195 * because that's what the dd EBCDIC->ASCII table maps the EBCDIC newline
196 * character to. It might be more appropriate to include it in the 8859
197 * set instead of the ASCII set, but it's got to be included in *something*
198 * we recognize or EBCDIC files aren't going to be considered textual.
199 * Some old Unix source files use SO/SI (^N/^O) to shift between Greek
200 * and Latin characters, so these should possibly be allowed. But they
201 * make a real mess on VT100-style displays if they're not paired properly,
202 * so we are probably better off not calling them text.
203 *
204 * A file is considered to be ISO-8859 text if its characters are all
205 * either ASCII, according to the above definition, or printing characters
206 * from the ISO-8859 8-bit extension, characters 0xA0 ... 0xFF.
207 *
208 * Finally, a file is considered to be international text from some other
209 * character code if its characters are all either ISO-8859 (according to
210 * the above definition) or characters in the range 0x80 ... 0x9F, which
211 * ISO-8859 considers to be control characters but the IBM PC and Macintosh
212 * consider to be printing characters.
213 */
214
215 #define F 0 /* character never appears in text */
216 #define T 1 /* character appears in plain ASCII text */
217 #define I 2 /* character appears in ISO-8859 text */
218 #define X 3 /* character appears in non-ISO extended ASCII (Mac, IBM PC) */
219
220 private char text_chars[256] = {
221 /* BEL BS HT LF VT FF CR */
222 F, F, F, F, F, F, F, T, T, T, T, T, T, T, F, F, /* 0x0X */
223 /* ESC */
224 F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */
225 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x2X */
226 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x3X */
227 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x4X */
228 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x5X */
229 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x6X */
230 T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, F, /* 0x7X */
231 /* NEL */
232 X, X, X, X, X, T, X, X, X, X, X, X, X, X, X, X, /* 0x8X */
233 X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, /* 0x9X */
234 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xaX */
235 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xbX */
236 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xcX */
237 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xdX */
238 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xeX */
239 I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I /* 0xfX */
240 };
241
242 private int
looks_ascii(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)243 looks_ascii(const unsigned char *buf, size_t nbytes, unichar *ubuf,
244 size_t *ulen)
245 {
246 size_t i;
247
248 *ulen = 0;
249
250 for (i = 0; i < nbytes; i++) {
251 int t = text_chars[buf[i]];
252
253 if (t != T)
254 return 0;
255
256 ubuf[(*ulen)++] = buf[i];
257 }
258
259 return 1;
260 }
261
262 private int
looks_latin1(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)263 looks_latin1(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen)
264 {
265 size_t i;
266
267 *ulen = 0;
268
269 for (i = 0; i < nbytes; i++) {
270 int t = text_chars[buf[i]];
271
272 if (t != T && t != I)
273 return 0;
274
275 ubuf[(*ulen)++] = buf[i];
276 }
277
278 return 1;
279 }
280
281 private int
looks_extended(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)282 looks_extended(const unsigned char *buf, size_t nbytes, unichar *ubuf,
283 size_t *ulen)
284 {
285 size_t i;
286
287 *ulen = 0;
288
289 for (i = 0; i < nbytes; i++) {
290 int t = text_chars[buf[i]];
291
292 if (t != T && t != I && t != X)
293 return 0;
294
295 ubuf[(*ulen)++] = buf[i];
296 }
297
298 return 1;
299 }
300
301 /*
302 * Decide whether some text looks like UTF-8. Returns:
303 *
304 * -1: invalid UTF-8
305 * 0: uses odd control characters, so doesn't look like text
306 * 1: 7-bit text
307 * 2: definitely UTF-8 text (valid high-bit set bytes)
308 *
309 * If ubuf is non-NULL on entry, text is decoded into ubuf, *ulen;
310 * ubuf must be big enough!
311 */
312 protected int
file_looks_utf8(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)313 file_looks_utf8(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen)
314 {
315 size_t i;
316 int n;
317 unichar c;
318 int gotone = 0, ctrl = 0;
319
320 if (ubuf)
321 *ulen = 0;
322
323 for (i = 0; i < nbytes; i++) {
324 if ((buf[i] & 0x80) == 0) { /* 0xxxxxxx is plain ASCII */
325 /*
326 * Even if the whole file is valid UTF-8 sequences,
327 * still reject it if it uses weird control characters.
328 */
329
330 if (text_chars[buf[i]] != T)
331 ctrl = 1;
332
333 if (ubuf)
334 ubuf[(*ulen)++] = buf[i];
335 } else if ((buf[i] & 0x40) == 0) { /* 10xxxxxx never 1st byte */
336 return -1;
337 } else { /* 11xxxxxx begins UTF-8 */
338 int following;
339
340 if ((buf[i] & 0x20) == 0) { /* 110xxxxx */
341 c = buf[i] & 0x1f;
342 following = 1;
343 } else if ((buf[i] & 0x10) == 0) { /* 1110xxxx */
344 c = buf[i] & 0x0f;
345 following = 2;
346 } else if ((buf[i] & 0x08) == 0) { /* 11110xxx */
347 c = buf[i] & 0x07;
348 following = 3;
349 } else if ((buf[i] & 0x04) == 0) { /* 111110xx */
350 c = buf[i] & 0x03;
351 following = 4;
352 } else if ((buf[i] & 0x02) == 0) { /* 1111110x */
353 c = buf[i] & 0x01;
354 following = 5;
355 } else
356 return -1;
357
358 for (n = 0; n < following; n++) {
359 i++;
360 if (i >= nbytes)
361 goto done;
362
363 if ((buf[i] & 0x80) == 0 || (buf[i] & 0x40))
364 return -1;
365
366 c = (c << 6) + (buf[i] & 0x3f);
367 }
368
369 if (ubuf)
370 ubuf[(*ulen)++] = c;
371 gotone = 1;
372 }
373 }
374 done:
375 return ctrl ? 0 : (gotone ? 2 : 1);
376 }
377
378 /*
379 * Decide whether some text looks like UTF-8 with BOM. If there is no
380 * BOM, return -1; otherwise return the result of looks_utf8 on the
381 * rest of the text.
382 */
383 private int
looks_utf8_with_BOM(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)384 looks_utf8_with_BOM(const unsigned char *buf, size_t nbytes, unichar *ubuf,
385 size_t *ulen)
386 {
387 if (nbytes > 3 && buf[0] == 0xef && buf[1] == 0xbb && buf[2] == 0xbf)
388 return file_looks_utf8(buf + 3, nbytes - 3, ubuf, ulen);
389 else
390 return -1;
391 }
392
393 private int
looks_utf7(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)394 looks_utf7(const unsigned char *buf, size_t nbytes, unichar *ubuf, size_t *ulen)
395 {
396 if (nbytes > 4 && buf[0] == '+' && buf[1] == '/' && buf[2] == 'v')
397 switch (buf[3]) {
398 case '8':
399 case '9':
400 case '+':
401 case '/':
402 if (ubuf)
403 *ulen = 0;
404 return 1;
405 default:
406 return -1;
407 }
408 else
409 return -1;
410 }
411
412 private int
looks_ucs16(const unsigned char * buf,size_t nbytes,unichar * ubuf,size_t * ulen)413 looks_ucs16(const unsigned char *buf, size_t nbytes, unichar *ubuf,
414 size_t *ulen)
415 {
416 int bigend;
417 size_t i;
418
419 if (nbytes < 2)
420 return 0;
421
422 if (buf[0] == 0xff && buf[1] == 0xfe)
423 bigend = 0;
424 else if (buf[0] == 0xfe && buf[1] == 0xff)
425 bigend = 1;
426 else
427 return 0;
428
429 *ulen = 0;
430
431 for (i = 2; i + 1 < nbytes; i += 2) {
432 /* XXX fix to properly handle chars > 65536 */
433
434 if (bigend)
435 ubuf[(*ulen)++] = buf[i + 1] + 256 * buf[i];
436 else
437 ubuf[(*ulen)++] = buf[i] + 256 * buf[i + 1];
438
439 if (ubuf[*ulen - 1] == 0xfffe)
440 return 0;
441 if (ubuf[*ulen - 1] < 128 &&
442 text_chars[(size_t)ubuf[*ulen - 1]] != T)
443 return 0;
444 }
445
446 return 1 + bigend;
447 }
448
449 #undef F
450 #undef T
451 #undef I
452 #undef X
453
454 /*
455 * This table maps each EBCDIC character to an (8-bit extended) ASCII
456 * character, as specified in the rationale for the dd(1) command in
457 * draft 11.2 (September, 1991) of the POSIX P1003.2 standard.
458 *
459 * Unfortunately it does not seem to correspond exactly to any of the
460 * five variants of EBCDIC documented in IBM's _Enterprise Systems
461 * Architecture/390: Principles of Operation_, SA22-7201-06, Seventh
462 * Edition, July, 1999, pp. I-1 - I-4.
463 *
464 * Fortunately, though, all versions of EBCDIC, including this one, agree
465 * on most of the printing characters that also appear in (7-bit) ASCII.
466 * Of these, only '|', '!', '~', '^', '[', and ']' are in question at all.
467 *
468 * Fortunately too, there is general agreement that codes 0x00 through
469 * 0x3F represent control characters, 0x41 a nonbreaking space, and the
470 * remainder printing characters.
471 *
472 * This is sufficient to allow us to identify EBCDIC text and to distinguish
473 * between old-style and internationalized examples of text.
474 */
475
476 private unsigned char ebcdic_to_ascii[] = {
477 0, 1, 2, 3, 156, 9, 134, 127, 151, 141, 142, 11, 12, 13, 14, 15,
478 16, 17, 18, 19, 157, 133, 8, 135, 24, 25, 146, 143, 28, 29, 30, 31,
479 128, 129, 130, 131, 132, 10, 23, 27, 136, 137, 138, 139, 140, 5, 6, 7,
480 144, 145, 22, 147, 148, 149, 150, 4, 152, 153, 154, 155, 20, 21, 158, 26,
481 ' ', 160, 161, 162, 163, 164, 165, 166, 167, 168, 213, '.', '<', '(', '+', '|',
482 '&', 169, 170, 171, 172, 173, 174, 175, 176, 177, '!', '$', '*', ')', ';', '~',
483 '-', '/', 178, 179, 180, 181, 182, 183, 184, 185, 203, ',', '%', '_', '>', '?',
484 186, 187, 188, 189, 190, 191, 192, 193, 194, '`', ':', '#', '@', '\'','=', '"',
485 195, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 196, 197, 198, 199, 200, 201,
486 202, 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', '^', 204, 205, 206, 207, 208,
487 209, 229, 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 210, 211, 212, '[', 214, 215,
488 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, ']', 230, 231,
489 '{', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 232, 233, 234, 235, 236, 237,
490 '}', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 238, 239, 240, 241, 242, 243,
491 '\\',159, 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 244, 245, 246, 247, 248, 249,
492 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 250, 251, 252, 253, 254, 255
493 };
494
495 #ifdef notdef
496 /*
497 * The following EBCDIC-to-ASCII table may relate more closely to reality,
498 * or at least to modern reality. It comes from
499 *
500 * http://ftp.s390.ibm.com/products/oe/bpxqp9.html
501 *
502 * and maps the characters of EBCDIC code page 1047 (the code used for
503 * Unix-derived software on IBM's 390 systems) to the corresponding
504 * characters from ISO 8859-1.
505 *
506 * If this table is used instead of the above one, some of the special
507 * cases for the NEL character can be taken out of the code.
508 */
509
510 private unsigned char ebcdic_1047_to_8859[] = {
511 0x00,0x01,0x02,0x03,0x9C,0x09,0x86,0x7F,0x97,0x8D,0x8E,0x0B,0x0C,0x0D,0x0E,0x0F,
512 0x10,0x11,0x12,0x13,0x9D,0x0A,0x08,0x87,0x18,0x19,0x92,0x8F,0x1C,0x1D,0x1E,0x1F,
513 0x80,0x81,0x82,0x83,0x84,0x85,0x17,0x1B,0x88,0x89,0x8A,0x8B,0x8C,0x05,0x06,0x07,
514 0x90,0x91,0x16,0x93,0x94,0x95,0x96,0x04,0x98,0x99,0x9A,0x9B,0x14,0x15,0x9E,0x1A,
515 0x20,0xA0,0xE2,0xE4,0xE0,0xE1,0xE3,0xE5,0xE7,0xF1,0xA2,0x2E,0x3C,0x28,0x2B,0x7C,
516 0x26,0xE9,0xEA,0xEB,0xE8,0xED,0xEE,0xEF,0xEC,0xDF,0x21,0x24,0x2A,0x29,0x3B,0x5E,
517 0x2D,0x2F,0xC2,0xC4,0xC0,0xC1,0xC3,0xC5,0xC7,0xD1,0xA6,0x2C,0x25,0x5F,0x3E,0x3F,
518 0xF8,0xC9,0xCA,0xCB,0xC8,0xCD,0xCE,0xCF,0xCC,0x60,0x3A,0x23,0x40,0x27,0x3D,0x22,
519 0xD8,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0xAB,0xBB,0xF0,0xFD,0xFE,0xB1,
520 0xB0,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0xAA,0xBA,0xE6,0xB8,0xC6,0xA4,
521 0xB5,0x7E,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0xA1,0xBF,0xD0,0x5B,0xDE,0xAE,
522 0xAC,0xA3,0xA5,0xB7,0xA9,0xA7,0xB6,0xBC,0xBD,0xBE,0xDD,0xA8,0xAF,0x5D,0xB4,0xD7,
523 0x7B,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0xAD,0xF4,0xF6,0xF2,0xF3,0xF5,
524 0x7D,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50,0x51,0x52,0xB9,0xFB,0xFC,0xF9,0xFA,0xFF,
525 0x5C,0xF7,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0xB2,0xD4,0xD6,0xD2,0xD3,0xD5,
526 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0xB3,0xDB,0xDC,0xD9,0xDA,0x9F
527 };
528 #endif
529
530 /*
531 * Copy buf[0 ... nbytes-1] into out[], translating EBCDIC to ASCII.
532 */
533 private void
from_ebcdic(const unsigned char * buf,size_t nbytes,unsigned char * out)534 from_ebcdic(const unsigned char *buf, size_t nbytes, unsigned char *out)
535 {
536 size_t i;
537
538 for (i = 0; i < nbytes; i++) {
539 out[i] = ebcdic_to_ascii[buf[i]];
540 }
541 }
542