GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/dd/conv.c Lines: 2 83 2.4 %
Date: 2017-11-13 Branches: 1 78 1.3 %

Line Branch Exec Source
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/*	$OpenBSD: conv.c,v 1.13 2016/08/16 16:44:55 krw Exp $	*/
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/*	$NetBSD: conv.c,v 1.6 1996/02/20 19:29:02 jtc Exp $	*/
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/*-
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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. 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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#include <sys/types.h>
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#include <sys/time.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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#define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))
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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(void)
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{
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	size_t cnt;
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	u_char *inp;
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	const u_char *t;
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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(void)
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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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#ifdef	NO_CONV
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/* Build a smaller version (i.e. for a miniroot) */
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/* These can not be called, but just in case...  */
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static char no_block[] = "unblock and -DNO_CONV?";
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void block()       { errx(1, "%s", no_block + 2); }
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void block_close() { errx(1, "%s", no_block + 2); }
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void unblock()       { errx(1, "%s", no_block); }
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void unblock_close() { errx(1, "%s", no_block); }
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#else	/* NO_CONV */
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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(void)
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{
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	static int intrunc;
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	int ch = -1;
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	size_t cnt, maxlen;
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	u_char *inp, *outp;
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	const u_char *t;
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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;
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		    cnt && *inp++ != '\n'; --cnt);
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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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	for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
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		maxlen = MINIMUM(cbsz, in.dbcnt);
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		if ((t = ctab) != NULL)
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			for (cnt = 0;
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			    cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
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				*outp++ = t[ch];
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		else
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			for (cnt = 0;
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			    cnt < maxlen && (ch = *inp++) != '\n'; ++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(void)
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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,
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		    ctab ? ctab[' '] : ' ', 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(void)
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{
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	size_t cnt;
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	u_char *inp;
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	const u_char *t;
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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 - 1; cnt--; inp--)
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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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		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.dbcnt;
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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(void)
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{
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	size_t cnt;
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	u_char *t;
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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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		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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#endif	/* NO_CONV */