diff options
Diffstat (limited to 'contrib/file/ascmagic.c')
| -rw-r--r-- | contrib/file/ascmagic.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/contrib/file/ascmagic.c b/contrib/file/ascmagic.c new file mode 100644 index 0000000..2a76a63 --- /dev/null +++ b/contrib/file/ascmagic.c @@ -0,0 +1,688 @@ +/* + * ASCII magic -- file types that we know based on keywords + * that can appear anywhere in the file. + * + * Copyright (c) Ian F. Darwin, 1987. + * Written by Ian F. Darwin. + * + * Extensively modified by Eric Fischer <enf@pobox.com> in July, 2000, + * to handle character codes other than ASCII on a unified basis. + * + * Joerg Wunsch <joerg@freebsd.org> wrote the original support for 8-bit + * international characters, now subsumed into this file. + */ + +/* + * This software is not subject to any license of the American Telephone + * and Telegraph Company or of the Regents of the University of California. + * + * Permission is granted to anyone to use this software for any purpose on + * any computer system, and to alter it and redistribute it freely, subject + * to the following restrictions: + * + * 1. The author is not responsible for the consequences of use of this + * software, no matter how awful, even if they arise from flaws in it. + * + * 2. The origin of this software must not be misrepresented, either by + * explicit claim or by omission. Since few users ever read sources, + * credits must appear in the documentation. + * + * 3. Altered versions must be plainly marked as such, and must not be + * misrepresented as being the original software. Since few users + * ever read sources, credits must appear in the documentation. + * + * 4. This notice may not be removed or altered. + */ + +#include "file.h" +#include <stdio.h> +#include <string.h> +#include <memory.h> +#include <ctype.h> +#include <stdlib.h> +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif +#include "names.h" + +#ifndef lint +FILE_RCSID("@(#)$Id: ascmagic.c,v 1.28 2000/08/05 17:36:47 christos Exp $") +#endif /* lint */ + +typedef unsigned long unichar; + +#define MAXLINELEN 300 /* longest sane line length */ +#define ISSPC(x) ((x) == ' ' || (x) == '\t' || (x) == '\r' || (x) == '\n' \ + || (x) == 0x85 || (x) == '\f') + +static int looks_ascii __P((const unsigned char *, int, unichar *, int *)); +static int looks_utf8 __P((const unsigned char *, int, unichar *, int *)); +static int looks_unicode __P((const unsigned char *, int, unichar *, int *)); +static int looks_latin1 __P((const unsigned char *, int, unichar *, int *)); +static int looks_extended __P((const unsigned char *, int, unichar *, int *)); +static void from_ebcdic __P((const unsigned char *, int, unsigned char *)); +static int ascmatch __P((const unsigned char *, const unichar *, int)); + +int +ascmagic(buf, nbytes) + unsigned char *buf; + int nbytes; /* size actually read */ +{ + int i; + unsigned char *s; + char nbuf[HOWMANY+1]; /* one extra for terminating '\0' */ + unichar ubuf[HOWMANY+1]; /* one extra for terminating '\0' */ + int ulen; + char *token; + struct names *p; + + char *code = NULL; + char *code_mime = NULL; + char *type = NULL; + char *subtype = NULL; + char *subtype_mime = NULL; + + int has_escapes = 0; + int has_backspace = 0; + + int n_crlf = 0; + int n_lf = 0; + int n_cr = 0; + int n_nel = 0; + + int last_line_end = -1; + int has_long_lines = 0; + + /* + * Do the tar test first, because if the first file in the tar + * archive starts with a dot, we can confuse it with an nroff file. + */ + switch (is_tar(buf, nbytes)) { + case 1: + ckfputs(iflag ? "application/x-tar" : "tar archive", stdout); + return 1; + case 2: + ckfputs(iflag ? "application/x-tar, POSIX" + : "POSIX tar archive", stdout); + return 1; + } + + /* Undo the NUL-termination kindly provided by process() */ + + while (nbytes > 0 && buf[nbytes - 1] == '\0') + nbytes--; + + /* + * Then try to determine whether it's any character code we can + * identify. Each of these tests, if it succeeds, will leave + * the text converted into one-unichar-per-character Unicode in + * ubuf, and the number of characters converted in ulen. + */ + if (looks_ascii(buf, nbytes, ubuf, &ulen)) { + code = "ASCII"; + code_mime = "us-ascii"; + type = "text"; + } else if (looks_utf8(buf, nbytes, ubuf, &ulen)) { + code = "UTF-8 Unicode"; + code_mime = "utf-8"; + type = "text"; + } else if ((i = looks_unicode(buf, nbytes, ubuf, &ulen))) { + if (i == 1) + code = "Little-endian UTF-16 Unicode"; + else + code = "Big-endian UTF-16 Unicode"; + + type = "character data"; + code_mime = "utf-16"; /* is this defined? */ + } else if (looks_latin1(buf, nbytes, ubuf, &ulen)) { + code = "ISO-8859"; + type = "text"; + code_mime = "iso-8859-1"; + } else if (looks_extended(buf, nbytes, ubuf, &ulen)) { + code = "Non-ISO extended-ASCII"; + type = "text"; + code_mime = "unknown"; + } else { + from_ebcdic(buf, nbytes, nbuf); + + if (looks_ascii(nbuf, nbytes, ubuf, &ulen)) { + code = "EBCDIC"; + type = "character data"; + code_mime = "ebcdic"; + } else if (looks_latin1(nbuf, nbytes, ubuf, &ulen)) { + code = "International EBCDIC"; + type = "character data"; + code_mime = "ebcdic"; + } else { + return 0; /* doesn't look like text at all */ + } + } + + /* + * for troff, look for . + letter + letter or .\"; + * this must be done to disambiguate tar archives' ./file + * and other trash from real troff input. + * + * I believe Plan 9 troff allows non-ASCII characters in the names + * of macros, so this test might possibly fail on such a file. + */ + if (*ubuf == '.') { + unichar *tp = ubuf + 1; + + while (ISSPC(*tp)) + ++tp; /* skip leading whitespace */ + if ((tp[0] == '\\' && tp[1] == '\"') || + (isascii(tp[0]) && isalnum(tp[0]) && + isascii(tp[1]) && isalnum(tp[1]) && + ISSPC(tp[2]))) { + subtype_mime = "text/troff"; + subtype = "troff or preprocessor input"; + goto subtype_identified; + } + } + + if ((*buf == 'c' || *buf == 'C') && ISSPC(buf[1])) { + subtype_mime = "text/fortran"; + subtype = "fortran program"; + goto subtype_identified; + } + + /* look for tokens from names.h - this is expensive! */ + + i = 0; + while (i < ulen) { + int end; + + /* + * skip past any leading space + */ + while (i < ulen && ISSPC(ubuf[i])) + i++; + if (i >= ulen) + break; + + /* + * find the next whitespace + */ + for (end = i + 1; end < nbytes; end++) + if (ISSPC(ubuf[end])) + break; + + /* + * compare the word thus isolated against the token list + */ + for (p = names; p < names + NNAMES; p++) { + if (ascmatch(p->name, ubuf + i, end - i)) { + subtype = types[p->type].human; + subtype_mime = types[p->type].mime; + goto subtype_identified; + } + } + + i = end; + } + +subtype_identified: + + /* + * Now try to discover other details about the file. + */ + for (i = 0; i < ulen; i++) { + if (i > last_line_end + MAXLINELEN) + has_long_lines = 1; + + if (ubuf[i] == '\033') + has_escapes = 1; + if (ubuf[i] == '\b') + has_backspace = 1; + + if (ubuf[i] == '\r' && (i + 1 < ulen && ubuf[i + 1] == '\n')) { + n_crlf++; + last_line_end = i; + } + if (ubuf[i] == '\r' && (i + 1 >= ulen || ubuf[i + 1] != '\n')) { + n_cr++; + last_line_end = i; + } + if (ubuf[i] == '\n' && (i - 1 < 0 || ubuf[i - 1] != '\r')) { + n_lf++; + last_line_end = i; + } + if (ubuf[i] == 0x85) { /* X3.64/ECMA-43 "next line" character */ + n_nel++; + last_line_end = i; + } + } + + if (iflag) { + if (subtype_mime) + ckfputs(subtype_mime, stdout); + else + ckfputs("text/plain", stdout); + + if (code_mime) { + ckfputs("; charset=", stdout); + ckfputs(code_mime, stdout); + } + } else { + ckfputs(code, stdout); + + if (subtype) { + ckfputs(" ", stdout); + ckfputs(subtype, stdout); + } + + ckfputs(" ", stdout); + ckfputs(type, stdout); + + if (has_long_lines) + ckfputs(", with very long lines", stdout); + + /* + * Only report line terminators if we find one other than LF, + * or if we find none at all. + */ + if ((n_crlf == 0 && n_cr == 0 && n_nel == 0 && n_lf == 0) || + (n_crlf != 0 || n_cr != 0 || n_nel != 0)) { + ckfputs(", with", stdout); + + if (n_crlf == 0 && n_cr == 0 && n_nel == 0 && n_lf == 0) + ckfputs(" no", stdout); + else { + if (n_crlf) { + ckfputs(" CRLF", stdout); + if (n_cr || n_lf || n_nel) + ckfputs(",", stdout); + } + if (n_cr) { + ckfputs(" CR", stdout); + if (n_lf || n_nel) + ckfputs(",", stdout); + } + if (n_lf) { + ckfputs(" LF", stdout); + if (n_nel) + ckfputs(",", stdout); + } + if (n_nel) + ckfputs(" NEL", stdout); + } + + ckfputs(" line terminators", stdout); + } + + if (has_escapes) + ckfputs(", with escape sequences", stdout); + if (has_backspace) + ckfputs(", with overstriking", stdout); + } + + return 1; +} + +static int +ascmatch(s, us, ulen) + const unsigned char *s; + const unichar *us; + int ulen; +{ + size_t i; + + for (i = 0; i < ulen; i++) { + if (s[i] != us[i]) + return 0; + } + + if (s[i]) + return 0; + else + return 1; +} + +/* + * This table reflects a particular philosophy about what constitutes + * "text," and there is room for disagreement about it. + * + * Version 3.31 of the file command considered a file to be ASCII if + * each of its characters was approved by either the isascii() or + * isalpha() function. On most systems, this would mean that any + * file consisting only of characters in the range 0x00 ... 0x7F + * would be called ASCII text, but many systems might reasonably + * consider some characters outside this range to be alphabetic, + * so the file command would call such characters ASCII. It might + * have been more accurate to call this "considered textual on the + * local system" than "ASCII." + * + * It considered a file to be "International language text" if each + * of its characters was either an ASCII printing character (according + * to the real ASCII standard, not the above test), a character in + * the range 0x80 ... 0xFF, or one of the following control characters: + * backspace, tab, line feed, vertical tab, form feed, carriage return, + * escape. No attempt was made to determine the language in which files + * of this type were written. + * + * + * The table below considers a file to be ASCII if all of its characters + * are either ASCII printing characters (again, according to the X3.4 + * standard, not isascii()) or any of the following controls: bell, + * backspace, tab, line feed, form feed, carriage return, esc, nextline. + * + * I include bell because some programs (particularly shell scripts) + * use it literally, even though it is rare in normal text. I exclude + * vertical tab because it never seems to be used in real text. I also + * include, with hesitation, the X3.64/ECMA-43 control nextline (0x85), + * because that's what the dd EBCDIC->ASCII table maps the EBCDIC newline + * character to. It might be more appropriate to include it in the 8859 + * set instead of the ASCII set, but it's got to be included in *something* + * we recognize or EBCDIC files aren't going to be considered textual. + * Some old Unix source files use SO/SI (^N/^O) to shift between Greek + * and Latin characters, so these should possibly be allowed. But they + * make a real mess on VT100-style displays if they're not paired properly, + * so we are probably better off not calling them text. + * + * A file is considered to be ISO-8859 text if its characters are all + * either ASCII, according to the above definition, or printing characters + * from the ISO-8859 8-bit extension, characters 0xA0 ... 0xFF. + * + * Finally, a file is considered to be international text from some other + * character code if its characters are all either ISO-8859 (according to + * the above definition) or characters in the range 0x80 ... 0x9F, which + * ISO-8859 considers to be control characters but the IBM PC and Macintosh + * consider to be printing characters. + */ + +#define F 0 /* character never appears in text */ +#define T 1 /* character appears in plain ASCII text */ +#define I 2 /* character appears in ISO-8859 text */ +#define X 3 /* character appears in non-ISO extended ASCII (Mac, IBM PC) */ + +static char text_chars[256] = { + /* BEL BS HT LF FF CR */ + F, F, F, F, F, F, F, T, T, T, T, F, T, T, F, F, /* 0x0X */ + /* ESC */ + F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x2X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x3X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x4X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x5X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x6X */ + T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, F, /* 0x7X */ + /* NEL */ + X, X, X, X, X, T, X, X, X, X, X, X, X, X, X, X, /* 0x8X */ + X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, /* 0x9X */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xaX */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xbX */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xcX */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xdX */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, /* 0xeX */ + I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I /* 0xfX */ +}; + +static int +looks_ascii(buf, nbytes, ubuf, ulen) + const unsigned char *buf; + int nbytes; + unichar *ubuf; + int *ulen; +{ + int i; + + *ulen = 0; + + for (i = 0; i < nbytes; i++) { + int t = text_chars[buf[i]]; + + if (t != T) + return 0; + + ubuf[(*ulen)++] = buf[i]; + } + + return 1; +} + +static int +looks_latin1(buf, nbytes, ubuf, ulen) + const unsigned char *buf; + int nbytes; + unichar *ubuf; + int *ulen; +{ + int i; + + *ulen = 0; + + for (i = 0; i < nbytes; i++) { + int t = text_chars[buf[i]]; + + if (t != T && t != I) + return 0; + + ubuf[(*ulen)++] = buf[i]; + } + + return 1; +} + +static int +looks_extended(buf, nbytes, ubuf, ulen) + const unsigned char *buf; + int nbytes; + unichar *ubuf; + int *ulen; +{ + int i; + + *ulen = 0; + + for (i = 0; i < nbytes; i++) { + int t = text_chars[buf[i]]; + + if (t != T && t != I && t != X) + return 0; + + ubuf[(*ulen)++] = buf[i]; + } + + return 1; +} + +int +looks_utf8(buf, nbytes, ubuf, ulen) + const unsigned char *buf; + int nbytes; + unichar *ubuf; + int *ulen; +{ + int i, n; + unichar c; + int gotone = 0; + + *ulen = 0; + + for (i = 0; i < nbytes; i++) { + if ((buf[i] & 0x80) == 0) { /* 0xxxxxxx is plain ASCII */ + /* + * Even if the whole file is valid UTF-8 sequences, + * still reject it if it uses weird control characters. + */ + + if (text_chars[buf[i]] != T) + return 0; + + ubuf[(*ulen)++] = buf[i]; + } else if ((buf[i] & 0x40) == 0) { /* 10xxxxxx never 1st byte */ + return 0; + } else { /* 11xxxxxx begins UTF-8 */ + int following; + + if ((buf[i] & 0x20) == 0) { /* 110xxxxx */ + c = buf[i] & 0x1f; + following = 1; + } else if ((buf[i] & 0x10) == 0) { /* 1110xxxx */ + c = buf[i] & 0x0f; + following = 2; + } else if ((buf[i] & 0x08) == 0) { /* 11110xxx */ + c = buf[i] & 0x07; + following = 3; + } else if ((buf[i] & 0x04) == 0) { /* 111110xx */ + c = buf[i] & 0x03; + following = 4; + } else if ((buf[i] & 0x02) == 0) { /* 1111110x */ + c = buf[i] & 0x01; + following = 5; + } else + return 0; + + for (n = 0; n < following; n++) { + i++; + if (i >= nbytes) + goto done; + + if ((buf[i] & 0x80) == 0 || (buf[i] & 0x40)) + return 0; + + c = (c << 6) + (buf[i] & 0x3f); + } + + ubuf[(*ulen)++] = c; + gotone = 1; + } + } +done: + return gotone; /* don't claim it's UTF-8 if it's all 7-bit */ +} + +static int +looks_unicode(buf, nbytes, ubuf, ulen) + const unsigned char *buf; + int nbytes; + unichar *ubuf; + int *ulen; +{ + int bigend; + int i; + + if (nbytes < 2) + return 0; + + if (buf[0] == 0xff && buf[1] == 0xfe) + bigend = 0; + else if (buf[0] == 0xfe && buf[1] == 0xff) + bigend = 1; + else + return 0; + + *ulen = 0; + + for (i = 2; i + 1 < nbytes; i += 2) { + /* XXX fix to properly handle chars > 65536 */ + + if (bigend) + ubuf[(*ulen)++] = buf[i + 1] + 256 * buf[i]; + else + ubuf[(*ulen)++] = buf[i] + 256 * buf[i + 1]; + + if (ubuf[*ulen - 1] == 0xfffe) + return 0; + if (ubuf[*ulen - 1] < 128 && text_chars[ubuf[*ulen - 1]] != T) + return 0; + } + + return 1; +} + +#undef F +#undef T +#undef I +#undef X + +/* + * This table maps each EBCDIC character to an (8-bit extended) ASCII + * character, as specified in the rationale for the dd(1) command in + * draft 11.2 (September, 1991) of the POSIX P1003.2 standard. + * + * Unfortunately it does not seem to correspond exactly to any of the + * five variants of EBCDIC documented in IBM's _Enterprise Systems + * Architecture/390: Principles of Operation_, SA22-7201-06, Seventh + * Edition, July, 1999, pp. I-1 - I-4. + * + * Fortunately, though, all versions of EBCDIC, including this one, agree + * on most of the printing characters that also appear in (7-bit) ASCII. + * Of these, only '|', '!', '~', '^', '[', and ']' are in question at all. + * + * Fortunately too, there is general agreement that codes 0x00 through + * 0x3F represent control characters, 0x41 a nonbreaking space, and the + * remainder printing characters. + * + * This is sufficient to allow us to identify EBCDIC text and to distinguish + * between old-style and internationalized examples of text. + */ + +unsigned char ebcdic_to_ascii[] = { + 0, 1, 2, 3, 156, 9, 134, 127, 151, 141, 142, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 157, 133, 8, 135, 24, 25, 146, 143, 28, 29, 30, 31, +128, 129, 130, 131, 132, 10, 23, 27, 136, 137, 138, 139, 140, 5, 6, 7, +144, 145, 22, 147, 148, 149, 150, 4, 152, 153, 154, 155, 20, 21, 158, 26, +' ', 160, 161, 162, 163, 164, 165, 166, 167, 168, 213, '.', '<', '(', '+', '|', +'&', 169, 170, 171, 172, 173, 174, 175, 176, 177, '!', '$', '*', ')', ';', '~', +'-', '/', 178, 179, 180, 181, 182, 183, 184, 185, 203, ',', '%', '_', '>', '?', +186, 187, 188, 189, 190, 191, 192, 193, 194, '`', ':', '#', '@', '\'','=', '"', +195, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 196, 197, 198, 199, 200, 201, +202, 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', '^', 204, 205, 206, 207, 208, +209, 229, 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 210, 211, 212, '[', 214, 215, +216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, ']', 230, 231, +'{', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 232, 233, 234, 235, 236, 237, +'}', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 238, 239, 240, 241, 242, 243, +'\\',159, 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 244, 245, 246, 247, 248, 249, +'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 250, 251, 252, 253, 254, 255 +}; + +/* + * The following EBCDIC-to-ASCII table may relate more closely to reality, + * or at least to modern reality. It comes from + * + * http://ftp.s390.ibm.com/products/oe/bpxqp9.html + * + * and maps the characters of EBCDIC code page 1047 (the code used for + * Unix-derived software on IBM's 390 systems) to the corresponding + * characters from ISO 8859-1. + * + * If this table is used instead of the above one, some of the special + * cases for the NEL character can be taken out of the code. + */ + +unsigned char ebcdic_1047_to_8859[] = { +0x00,0x01,0x02,0x03,0x9C,0x09,0x86,0x7F,0x97,0x8D,0x8E,0x0B,0x0C,0x0D,0x0E,0x0F, +0x10,0x11,0x12,0x13,0x9D,0x0A,0x08,0x87,0x18,0x19,0x92,0x8F,0x1C,0x1D,0x1E,0x1F, +0x80,0x81,0x82,0x83,0x84,0x85,0x17,0x1B,0x88,0x89,0x8A,0x8B,0x8C,0x05,0x06,0x07, +0x90,0x91,0x16,0x93,0x94,0x95,0x96,0x04,0x98,0x99,0x9A,0x9B,0x14,0x15,0x9E,0x1A, +0x20,0xA0,0xE2,0xE4,0xE0,0xE1,0xE3,0xE5,0xE7,0xF1,0xA2,0x2E,0x3C,0x28,0x2B,0x7C, +0x26,0xE9,0xEA,0xEB,0xE8,0xED,0xEE,0xEF,0xEC,0xDF,0x21,0x24,0x2A,0x29,0x3B,0x5E, +0x2D,0x2F,0xC2,0xC4,0xC0,0xC1,0xC3,0xC5,0xC7,0xD1,0xA6,0x2C,0x25,0x5F,0x3E,0x3F, +0xF8,0xC9,0xCA,0xCB,0xC8,0xCD,0xCE,0xCF,0xCC,0x60,0x3A,0x23,0x40,0x27,0x3D,0x22, +0xD8,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0xAB,0xBB,0xF0,0xFD,0xFE,0xB1, +0xB0,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,0xAA,0xBA,0xE6,0xB8,0xC6,0xA4, +0xB5,0x7E,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0xA1,0xBF,0xD0,0x5B,0xDE,0xAE, +0xAC,0xA3,0xA5,0xB7,0xA9,0xA7,0xB6,0xBC,0xBD,0xBE,0xDD,0xA8,0xAF,0x5D,0xB4,0xD7, +0x7B,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0xAD,0xF4,0xF6,0xF2,0xF3,0xF5, +0x7D,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50,0x51,0x52,0xB9,0xFB,0xFC,0xF9,0xFA,0xFF, +0x5C,0xF7,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0xB2,0xD4,0xD6,0xD2,0xD3,0xD5, +0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0xB3,0xDB,0xDC,0xD9,0xDA,0x9F +}; + +/* + * Copy buf[0 ... nbytes-1] into out[], translating EBCDIC to ASCII. + */ +static void +from_ebcdic(buf, nbytes, out) + const unsigned char *buf; + int nbytes; + unsigned char *out; +{ + int i; + + for (i = 0; i < nbytes; i++) { + out[i] = ebcdic_to_ascii[buf[i]]; + } +} |
