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271 lines
7.0 KiB
C
271 lines
7.0 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego and Lance
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* Visser of Convex Computer Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)conv.c 8.3 (Berkeley) 4/2/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <err.h>
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#include <string.h>
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#include "dd.h"
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#include "extern.h"
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/*
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* def --
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* Copy input to output. Input is buffered until reaches obs, and then
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* output until less than obs remains. Only a single buffer is used.
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* Worst case buffer calculation is (ibs + obs - 1).
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*/
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void
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def()
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{
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u_char *inp;
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const u_char *t;
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size_t cnt;
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if ((t = ctab) != NULL)
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for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
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*inp = t[*inp];
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/* Make the output buffer look right. */
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out.dbp = in.dbp;
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out.dbcnt = in.dbcnt;
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if (in.dbcnt >= out.dbsz) {
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/* If the output buffer is full, write it. */
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dd_out(0);
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/*
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* Ddout copies the leftover output to the beginning of
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* the buffer and resets the output buffer. Reset the
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* input buffer to match it.
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*/
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in.dbp = out.dbp;
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in.dbcnt = out.dbcnt;
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}
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}
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void
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def_close()
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{
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/* Just update the count, everything is already in the buffer. */
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if (in.dbcnt)
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out.dbcnt = in.dbcnt;
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}
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/*
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* Copy variable length newline terminated records with a max size cbsz
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* bytes to output. Records less than cbs are padded with spaces.
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*
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* max in buffer: MAX(ibs, cbsz)
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* max out buffer: obs + cbsz
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*/
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void
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block()
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{
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u_char *inp, *outp;
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const u_char *t;
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size_t cnt, maxlen;
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static int intrunc;
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int ch;
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/*
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* Record truncation can cross block boundaries. If currently in a
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* truncation state, keep tossing characters until reach a newline.
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* Start at the beginning of the buffer, as the input buffer is always
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* left empty.
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*/
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if (intrunc) {
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for (inp = in.db, cnt = in.dbrcnt; cnt && *inp++ != '\n'; --cnt)
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;
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if (!cnt) {
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in.dbcnt = 0;
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in.dbp = in.db;
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return;
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}
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intrunc = 0;
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/* Adjust the input buffer numbers. */
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in.dbcnt = cnt - 1;
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in.dbp = inp + cnt - 1;
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}
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/*
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* Copy records (max cbsz size chunks) into the output buffer. The
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* translation is done as we copy into the output buffer.
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*/
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ch = 0;
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for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
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maxlen = MIN(cbsz, in.dbcnt);
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if ((t = ctab) != NULL)
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for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
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++cnt)
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*outp++ = t[ch];
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else
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for (cnt = 0; cnt < maxlen && (ch = *inp++) != '\n';
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++cnt)
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*outp++ = ch;
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/*
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* Check for short record without a newline. Reassemble the
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* input block.
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*/
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if (ch != '\n' && in.dbcnt < cbsz) {
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(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
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break;
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}
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/* Adjust the input buffer numbers. */
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in.dbcnt -= cnt;
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if (ch == '\n')
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--in.dbcnt;
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/* Pad short records with spaces. */
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if (cnt < cbsz)
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(void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
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else {
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/*
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* If the next character wouldn't have ended the
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* block, it's a truncation.
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*/
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if (!in.dbcnt || *inp != '\n')
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++st.trunc;
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/* Toss characters to a newline. */
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for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
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if (!in.dbcnt)
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intrunc = 1;
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else
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--in.dbcnt;
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}
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/* Adjust output buffer numbers. */
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out.dbp += cbsz;
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if ((out.dbcnt += cbsz) >= out.dbsz)
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dd_out(0);
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outp = out.dbp;
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}
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in.dbp = in.db + in.dbcnt;
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}
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void
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block_close()
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{
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/*
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* Copy any remaining data into the output buffer and pad to a record.
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* Don't worry about truncation or translation, the input buffer is
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* always empty when truncating, and no characters have been added for
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* translation. The bottom line is that anything left in the input
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* buffer is a truncated record. Anything left in the output buffer
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* just wasn't big enough.
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*/
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if (in.dbcnt) {
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++st.trunc;
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(void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
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(void)memset(out.dbp + in.dbcnt, ctab ? ctab[' '] : ' ',
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cbsz - in.dbcnt);
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out.dbcnt += cbsz;
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}
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}
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/*
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* Convert fixed length (cbsz) records to variable length. Deletes any
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* trailing blanks and appends a newline.
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*
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* max in buffer: MAX(ibs, cbsz) + cbsz
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* max out buffer: obs + cbsz
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*/
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void
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unblock()
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{
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u_char *inp;
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const u_char *t;
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size_t cnt;
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/* Translation and case conversion. */
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if ((t = ctab) != NULL)
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for (cnt = in.dbrcnt, inp = in.dbp; cnt--;)
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*--inp = t[*inp];
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/*
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* Copy records (max cbsz size chunks) into the output buffer. The
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* translation has to already be done or we might not recognize the
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* spaces.
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*/
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for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
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for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t)
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;
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if (t >= inp) {
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cnt = t - inp + 1;
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(void)memmove(out.dbp, inp, cnt);
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out.dbp += cnt;
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out.dbcnt += cnt;
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}
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*out.dbp++ = '\n';
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if (++out.dbcnt >= out.dbsz)
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dd_out(0);
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}
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if (in.dbcnt)
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(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
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in.dbp = in.db + in.dbcnt;
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}
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void
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unblock_close()
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{
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u_char *t;
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size_t cnt;
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if (in.dbcnt) {
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warnx("%s: short input record", in.name);
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for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t)
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;
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if (t >= in.db) {
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cnt = t - in.db + 1;
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(void)memmove(out.dbp, in.db, cnt);
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out.dbp += cnt;
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out.dbcnt += cnt;
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}
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++out.dbcnt;
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*out.dbp++ = '\n';
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}
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}
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