mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-30 10:52:50 +00:00
269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993, 1994
|
|
* 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.
|
|
* 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
|
|
#if 0
|
|
static char sccsid[] = "@(#)conv.c 8.3 (Berkeley) 4/2/94";
|
|
#endif
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <err.h>
|
|
#include <inttypes.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(void)
|
|
{
|
|
u_char *inp;
|
|
const u_char *t;
|
|
size_t cnt;
|
|
|
|
if ((t = ctab) != NULL)
|
|
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);
|
|
|
|
/*
|
|
* dd_out 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(void)
|
|
{
|
|
/* 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(void)
|
|
{
|
|
u_char *inp, *outp;
|
|
const u_char *t;
|
|
size_t cnt, maxlen;
|
|
static int intrunc;
|
|
int ch;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
ch = 0;
|
|
for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
|
|
maxlen = MIN(cbsz, in.dbcnt);
|
|
if ((t = ctab) != NULL)
|
|
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) {
|
|
(void)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(void)
|
|
{
|
|
/*
|
|
* 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;
|
|
(void)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(void)
|
|
{
|
|
u_char *inp;
|
|
const u_char *t;
|
|
size_t cnt;
|
|
|
|
/* Translation and case conversion. */
|
|
if ((t = ctab) != NULL)
|
|
for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
|
|
*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;
|
|
(void)memmove(out.dbp, inp, cnt);
|
|
out.dbp += cnt;
|
|
out.dbcnt += cnt;
|
|
}
|
|
*out.dbp++ = '\n';
|
|
if (++out.dbcnt >= out.dbsz)
|
|
dd_out(0);
|
|
}
|
|
if (in.dbcnt)
|
|
(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
|
|
in.dbp = in.db + in.dbcnt;
|
|
}
|
|
|
|
void
|
|
unblock_close(void)
|
|
{
|
|
u_char *t;
|
|
size_t cnt;
|
|
|
|
if (in.dbcnt) {
|
|
warnx("%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;
|
|
(void)memmove(out.dbp, in.db, cnt);
|
|
out.dbp += cnt;
|
|
out.dbcnt += cnt;
|
|
}
|
|
++out.dbcnt;
|
|
*out.dbp++ = '\n';
|
|
}
|
|
}
|