koi2alt.c revision 33088 
1/*
2 * Copyright (C) 1993-98 by Andrey A. Chernov, Moscow, Russia.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * KOI8-R -> CP866 conversion filter (Russian character sets)
29 */
30
31#include <sys/types.h>
32#include <signal.h>
33#include <stdio.h>
34#include <unistd.h>
35
36int length = 66;
37int lines;
38
39char *koi2alt[] = {
40/*         0      1      2      3      4      5      6      7   */
41/*         8      9      A      B      C      D      E      F   */
42/* 8 */ "\xc4","\xb3","\xda","\xbf","\xc0","\xd9","\xc3","\xb4",
43	"\xc2","\xc1","\xc5","\xdf","\xdc","\xdb","\xdd","\xde",
44/* 9 */ "\xb0","\xb1","\xb2","\xb3","\xfe","\xf9","\xfb","-\b~",
45	"<\b_",">\b_","\xff","\xb3","\xf8","2\b-","\xfa",":\b-",
46/* A */ "\xcd","\xba","\xd5","\xf1","\xd6","\xc9","\xb8","\xb7",
47	"\xbb","\xd4","\xd3","\xc8","\xbe","\xbd","\xbc","\xc6",
48/* B */ "\xc7","\xcc","\xb5","\xf0","\xb6","\xb9","\xd1","\xd2",
49	"\xcb","\xcf","\xd0","\xca","\xd8","\xd7","\xce","c\b_",
50/* C */ "\xee","\xa0","\xa1","\xe6","\xa4","\xa5","\xe4","\xa3",
51	"\xe5","\xa8","\xa9","\xaa","\xab","\xac","\xad","\xae",
52/* D */ "\xaf","\xef","\xe0","\xe1","\xe2","\xe3","\xa6","\xa2",
53	"\xec","\xeb","\xa7","\xe8","\xed","\xe9","\xe7","\xea",
54/* E */ "\x9e","\x80","\x81","\x96","\x84","\x85","\x94","\x83",
55	"\x95","\x88","\x89","\x8a","\x8b","\x8c","\x8d","\x8e",
56/* F */ "\x8f","\x9f","\x90","\x91","\x92","\x93","\x86","\x82",
57	"\x9c","\x9b","\x87","\x98","\x9d","\x99","\x97","\x9a"
58};
59
60int main(int argc, char *argv[])
61{
62	int c, i;
63	char *cp;
64
65	while (--argc) {
66		if (*(cp = *++argv) == '-') {
67			switch (*++cp) {
68			case 'l':
69				if ((i = atoi(++cp)) > 0)
70					length = i;
71				break;
72			}
73		}
74	}
75
76	while ((c = getchar()) != EOF) {
77		if (c == '\031') {
78			if ((c = getchar()) == '\1') {
79				lines = 0;
80				fflush(stdout);
81				kill(getpid(), SIGSTOP);
82				continue;
83			} else {
84				ungetc(c, stdin);
85				c = '\031';
86			}
87		} else if (c & 0x80) {
88			fputs(koi2alt[c & 0x7F], stdout);
89			continue;
90		} else if (c == '\n')
91			lines++;
92		else if (c == '\f')
93			lines = length;
94		putchar(c);
95		if (lines >= length) {
96			lines = 0;
97			fflush(stdout);
98		}
99	}
100	return 0;
101}
102