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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Keith Muller of the University of California, San Diego and Lance
- * Visser of Convex Computer Corporation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)conv.c 5.6 (Berkeley) 4/28/93";
- #endif /* not lint */
-
- #include <sys/param.h>
-
- #include <string.h>
-
- #include "dd.h"
- #include "extern.h"
-
- /*
- * def --
- * Copy input to output. Input is buffered until reaches obs, and then
- * output until less than obs remains. Only a single buffer is used.
- * Worst case buffer calculation is (ibs + obs - 1).
- */
- void
- def()
- {
- register int cnt;
- register u_char *inp, *t;
-
- if (t = ctab)
- for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
- *inp = t[*inp];
-
- /* Make the output buffer look right. */
- out.dbp = in.dbp;
- out.dbcnt = in.dbcnt;
-
- if (in.dbcnt >= out.dbsz) {
- /* If the output buffer is full, write it. */
- dd_out(0);
-
- /*
- * Ddout copies the leftover output to the beginning of
- * the buffer and resets the output buffer. Reset the
- * input buffer to match it.
- */
- in.dbp = out.dbp;
- in.dbcnt = out.dbcnt;
- }
- }
-
- void
- def_close()
- {
- /* Just update the count, everything is already in the buffer. */
- if (in.dbcnt)
- out.dbcnt = in.dbcnt;
- }
-
- /*
- * Copy variable length newline terminated records with a max size cbsz
- * bytes to output. Records less than cbs are padded with spaces.
- *
- * max in buffer: MAX(ibs, cbsz)
- * max out buffer: obs + cbsz
- */
- void
- block()
- {
- static int intrunc;
- register int ch, cnt;
- register u_char *inp, *outp, *t;
- int maxlen;
-
- /*
- * Record truncation can cross block boundaries. If currently in a
- * truncation state, keep tossing characters until reach a newline.
- * Start at the beginning of the buffer, as the input buffer is always
- * left empty.
- */
- if (intrunc) {
- for (inp = in.db, cnt = in.dbrcnt;
- cnt && *inp++ != '\n'; --cnt);
- if (!cnt) {
- in.dbcnt = 0;
- in.dbp = in.db;
- return;
- }
- intrunc = 0;
- /* Adjust the input buffer numbers. */
- in.dbcnt = cnt - 1;
- in.dbp = inp + cnt - 1;
- }
-
- /*
- * Copy records (max cbsz size chunks) into the output buffer. The
- * translation is done as we copy into the output buffer.
- */
- for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
- maxlen = MIN(cbsz, in.dbcnt);
- if (t = ctab)
- for (cnt = 0;
- cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
- *outp++ = t[ch];
- else
- for (cnt = 0;
- cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
- *outp++ = ch;
- /*
- * Check for short record without a newline. Reassemble the
- * input block.
- */
- if (ch != '\n' && in.dbcnt < cbsz) {
- memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
- break;
- }
-
- /* Adjust the input buffer numbers. */
- in.dbcnt -= cnt;
- if (ch == '\n')
- --in.dbcnt;
-
- /* Pad short records with spaces. */
- if (cnt < cbsz)
- (void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
- else {
- /*
- * If the next character wouldn't have ended the
- * block, it's a truncation.
- */
- if (!in.dbcnt || *inp != '\n')
- ++st.trunc;
-
- /* Toss characters to a newline. */
- for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
- if (!in.dbcnt)
- intrunc = 1;
- else
- --in.dbcnt;
- }
-
- /* Adjust output buffer numbers. */
- out.dbp += cbsz;
- if ((out.dbcnt += cbsz) >= out.dbsz)
- dd_out(0);
- outp = out.dbp;
- }
- in.dbp = in.db + in.dbcnt;
- }
-
- void
- block_close()
- {
- /*
- * Copy any remaining data into the output buffer and pad to a record.
- * Don't worry about truncation or translation, the input buffer is
- * always empty when truncating, and no characters have been added for
- * translation. The bottom line is that anything left in the input
- * buffer is a truncated record. Anything left in the output buffer
- * just wasn't big enough.
- */
- if (in.dbcnt) {
- ++st.trunc;
- memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
- (void)memset(out.dbp + in.dbcnt,
- ctab ? ctab[' '] : ' ', cbsz - in.dbcnt);
- out.dbcnt += cbsz;
- }
- }
-
- /*
- * Convert fixed length (cbsz) records to variable length. Deletes any
- * trailing blanks and appends a newline.
- *
- * max in buffer: MAX(ibs, cbsz) + cbsz
- * max out buffer: obs + cbsz
- */
- void
- unblock()
- {
- register int cnt;
- register u_char *inp, *t;
-
- /* Translation and case conversion. */
- if (t = ctab)
- for (cnt = in.dbrcnt, inp = in.dbp; cnt--;)
- *--inp = t[*inp];
- /*
- * Copy records (max cbsz size chunks) into the output buffer. The
- * translation has to already be done or we might not recognize the
- * spaces.
- */
- for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
- for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t);
- if (t >= inp) {
- cnt = t - inp + 1;
- memmove(out.dbp, inp, cnt);
- out.dbp += cnt;
- out.dbcnt += cnt;
- }
- ++out.dbcnt;
- *out.dbp++ = '\n';
- if (out.dbcnt >= out.dbsz)
- dd_out(0);
- }
- if (in.dbcnt)
- memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
- in.dbp = in.db + in.dbcnt;
- }
-
- void
- unblock_close()
- {
- register int cnt;
- register u_char *t;
-
- if (in.dbcnt) {
- warn("%s: short input record", in.name);
- for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t);
- if (t >= in.db) {
- cnt = t - in.db + 1;
- memmove(out.dbp, in.db, cnt);
- out.dbp += cnt;
- out.dbcnt += cnt;
- }
- ++out.dbcnt;
- *out.dbp++ = '\n';
- }
- }
-