2 * Copyright (c) 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Keith Muller of the University of California, San Diego and Lance
7 * Visser of Convex Computer Corporation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, 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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)conv.c 8.3 (Berkeley) 4/2/94";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/param.h>
53 * Copy input to output. Input is buffered until reaches obs, and then
54 * output until less than obs remains. Only a single buffer is used.
55 * Worst case buffer calculation is (ibs + obs - 1).
64 if ((t = ctab) != NULL)
65 for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
68 /* Make the output buffer look right. */
72 if (in.dbcnt >= out.dbsz) {
73 /* If the output buffer is full, write it. */
77 * Ddout copies the leftover output to the beginning of
78 * the buffer and resets the output buffer. Reset the
79 * input buffer to match it.
89 /* Just update the count, everything is already in the buffer. */
95 * Copy variable length newline terminated records with a max size cbsz
96 * bytes to output. Records less than cbs are padded with spaces.
98 * max in buffer: MAX(ibs, cbsz)
99 * max out buffer: obs + cbsz
111 * Record truncation can cross block boundaries. If currently in a
112 * truncation state, keep tossing characters until reach a newline.
113 * Start at the beginning of the buffer, as the input buffer is always
117 for (inp = in.db, cnt = in.dbrcnt; cnt && *inp++ != '\n'; --cnt)
125 /* Adjust the input buffer numbers. */
127 in.dbp = inp + cnt - 1;
131 * Copy records (max cbsz size chunks) into the output buffer. The
132 * translation is done as we copy into the output buffer.
135 for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
136 maxlen = MIN(cbsz, in.dbcnt);
137 if ((t = ctab) != NULL)
138 for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
142 for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
146 * Check for short record without a newline. Reassemble the
149 if (ch != '\n' && in.dbcnt < cbsz) {
150 (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
154 /* Adjust the input buffer numbers. */
159 /* Pad short records with spaces. */
161 (void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
164 * If the next character wouldn't have ended the
165 * block, it's a truncation.
167 if (!in.dbcnt || *inp != '\n')
170 /* Toss characters to a newline. */
171 for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt)
179 /* Adjust output buffer numbers. */
181 if ((out.dbcnt += cbsz) >= out.dbsz)
185 in.dbp = in.db + in.dbcnt;
192 * Copy any remaining data into the output buffer and pad to a record.
193 * Don't worry about truncation or translation, the input buffer is
194 * always empty when truncating, and no characters have been added for
195 * translation. The bottom line is that anything left in the input
196 * buffer is a truncated record. Anything left in the output buffer
197 * just wasn't big enough.
201 (void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
202 (void)memset(out.dbp + in.dbcnt, ctab ? ctab[' '] : ' ',
209 * Convert fixed length (cbsz) records to variable length. Deletes any
210 * trailing blanks and appends a newline.
212 * max in buffer: MAX(ibs, cbsz) + cbsz
213 * max out buffer: obs + cbsz
222 /* Translation and case conversion. */
223 if ((t = ctab) != NULL)
224 for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
227 * Copy records (max cbsz size chunks) into the output buffer. The
228 * translation has to already be done or we might not recognize the
231 for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
232 for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t)
236 (void)memmove(out.dbp, inp, cnt);
241 if (++out.dbcnt >= out.dbsz)
245 (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
246 in.dbp = in.db + in.dbcnt;
256 warnx("%s: short input record", in.name);
257 for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t)
261 (void)memmove(out.dbp, in.db, cnt);