378 lines
6.8 KiB
C
378 lines
6.8 KiB
C
/* $NetBSD: fpr.c,v 1.9 2011/09/04 20:26:17 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Robert Corbett.
|
|
*
|
|
* 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. 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
|
|
The Regents of the University of California. All rights reserved.");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)fpr.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
__RCSID("$NetBSD: fpr.c,v 1.9 2011/09/04 20:26:17 joerg Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#define BLANK ' '
|
|
#define TAB '\t'
|
|
#define NUL '\000'
|
|
#define FF '\f'
|
|
#define BS '\b'
|
|
#define CR '\r'
|
|
#define VTAB '\013'
|
|
#define EOL '\n'
|
|
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
|
|
#define MAXCOL 170
|
|
#define TABSIZE 8
|
|
#define INITWIDTH 8
|
|
|
|
typedef
|
|
struct column {
|
|
int count;
|
|
int width;
|
|
char *str;
|
|
}
|
|
COLUMN;
|
|
|
|
static char cc;
|
|
static char saved;
|
|
static int length;
|
|
static char *text;
|
|
static int highcol;
|
|
static COLUMN *line;
|
|
static int maxpos;
|
|
static int maxcol;
|
|
|
|
static void flush(void);
|
|
static void get_text(void);
|
|
static void init(void);
|
|
__dead static void nospace(void);
|
|
static void savech(int);
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int ch;
|
|
char ateof;
|
|
int i;
|
|
int errorcount;
|
|
|
|
init();
|
|
errorcount = 0;
|
|
ateof = FALSE;
|
|
|
|
switch (ch = getchar()) {
|
|
case EOF:
|
|
exit(0);
|
|
case EOL:
|
|
cc = NUL;
|
|
ungetc((int) EOL, stdin);
|
|
break;
|
|
case BLANK:
|
|
cc = NUL;
|
|
break;
|
|
case '1':
|
|
cc = FF;
|
|
break;
|
|
case '0':
|
|
cc = EOL;
|
|
break;
|
|
case '+':
|
|
cc = CR;
|
|
break;
|
|
default:
|
|
errorcount = 1;
|
|
cc = NUL;
|
|
ungetc(ch, stdin);
|
|
break;
|
|
}
|
|
|
|
while (!ateof) {
|
|
get_text();
|
|
switch (ch = getchar()) {
|
|
case EOF:
|
|
flush();
|
|
ateof = TRUE;
|
|
break;
|
|
case EOL:
|
|
flush();
|
|
cc = NUL;
|
|
ungetc((int) EOL, stdin);
|
|
break;
|
|
case BLANK:
|
|
flush();
|
|
cc = NUL;
|
|
break;
|
|
case '1':
|
|
flush();
|
|
cc = FF;
|
|
break;
|
|
case '0':
|
|
flush();
|
|
cc = EOL;
|
|
break;
|
|
case '+':
|
|
for (i = 0; i < length; i++)
|
|
savech(i);
|
|
break;
|
|
default:
|
|
errorcount++;
|
|
flush();
|
|
cc = NUL;
|
|
ungetc(ch, stdin);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (errorcount)
|
|
fprintf(stderr, "Illegal carriage control - %d line%s.\n",
|
|
errorcount, errorcount == 1 ? "" : "s");
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
init(void)
|
|
{
|
|
COLUMN *cp;
|
|
COLUMN *cend;
|
|
char *sp;
|
|
|
|
length = 0;
|
|
maxpos = MAXCOL;
|
|
sp = malloc((unsigned) maxpos);
|
|
if (sp == NULL)
|
|
nospace();
|
|
text = sp;
|
|
|
|
highcol = -1;
|
|
maxcol = MAXCOL;
|
|
line = calloc(maxcol, sizeof(COLUMN));
|
|
if (line == NULL)
|
|
nospace();
|
|
cp = line;
|
|
cend = line + (maxcol - 1);
|
|
while (cp <= cend) {
|
|
cp->width = INITWIDTH;
|
|
sp = calloc(INITWIDTH, sizeof(char));
|
|
if (sp == NULL)
|
|
nospace();
|
|
cp->str = sp;
|
|
cp++;
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_text(void)
|
|
{
|
|
int i;
|
|
char ateol;
|
|
int ch;
|
|
int pos;
|
|
char *n;
|
|
|
|
i = 0;
|
|
ateol = FALSE;
|
|
|
|
while (!ateol) {
|
|
switch (ch = getchar()) {
|
|
case EOL:
|
|
case EOF:
|
|
ateol = TRUE;
|
|
break;
|
|
case TAB:
|
|
pos = (1 + i / TABSIZE) * TABSIZE;
|
|
if (pos > maxpos) {
|
|
n = realloc(text, (unsigned)(pos + 10));
|
|
if (n == NULL)
|
|
nospace();
|
|
text = n;
|
|
maxpos = pos + 10;
|
|
}
|
|
while (i < pos) {
|
|
text[i] = BLANK;
|
|
i++;
|
|
}
|
|
break;
|
|
case BS:
|
|
if (i > 0) {
|
|
i--;
|
|
savech(i);
|
|
}
|
|
break;
|
|
case CR:
|
|
while (i > 0) {
|
|
i--;
|
|
savech(i);
|
|
}
|
|
break;
|
|
case FF:
|
|
case VTAB:
|
|
flush();
|
|
cc = ch;
|
|
i = 0;
|
|
break;
|
|
default:
|
|
if (i >= maxpos) {
|
|
n = realloc(text, (unsigned)(i + 10));
|
|
if (n == NULL)
|
|
nospace();
|
|
maxpos = i + 10;
|
|
}
|
|
text[i] = ch;
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
length = i;
|
|
}
|
|
|
|
static void
|
|
savech(int col)
|
|
{
|
|
char ch;
|
|
int oldmax;
|
|
COLUMN *cp;
|
|
COLUMN *cend;
|
|
char *sp;
|
|
int newcount;
|
|
COLUMN *newline;
|
|
|
|
ch = text[col];
|
|
if (ch == BLANK)
|
|
return;
|
|
|
|
saved = TRUE;
|
|
|
|
if (col >= highcol)
|
|
highcol = col;
|
|
|
|
if (col >= maxcol) {
|
|
newline = realloc(line, (unsigned) (col + 10) * sizeof(COLUMN));
|
|
if (newline == NULL)
|
|
nospace();
|
|
line = newline;
|
|
oldmax = maxcol;
|
|
maxcol = col + 10;
|
|
cp = line + oldmax;
|
|
cend = line + (maxcol - 1);
|
|
while (cp <= cend) {
|
|
cp->width = INITWIDTH;
|
|
cp->count = 0;
|
|
sp = calloc(INITWIDTH, sizeof(char));
|
|
if (sp == NULL)
|
|
nospace();
|
|
cp->str = sp;
|
|
cp++;
|
|
}
|
|
}
|
|
cp = line + col;
|
|
newcount = cp->count + 1;
|
|
if (newcount > cp->width) {
|
|
cp->width = newcount;
|
|
sp = realloc(cp->str, (unsigned) newcount * sizeof(char));
|
|
if (sp == NULL)
|
|
nospace();
|
|
cp->str = sp;
|
|
}
|
|
cp->count = newcount;
|
|
cp->str[newcount - 1] = ch;
|
|
}
|
|
|
|
static void
|
|
flush(void)
|
|
{
|
|
int i;
|
|
int anchor;
|
|
int height;
|
|
int j;
|
|
|
|
if (cc != NUL)
|
|
putchar(cc);
|
|
|
|
if (!saved) {
|
|
i = length;
|
|
while (i > 0 && text[i - 1] == BLANK)
|
|
i--;
|
|
length = i;
|
|
for (i = 0; i < length; i++)
|
|
putchar(text[i]);
|
|
putchar(EOL);
|
|
return;
|
|
}
|
|
for (i = 0; i < length; i++)
|
|
savech(i);
|
|
|
|
anchor = 0;
|
|
while (anchor <= highcol) {
|
|
height = line[anchor].count;
|
|
if (height == 0) {
|
|
putchar(BLANK);
|
|
anchor++;
|
|
} else if (height == 1) {
|
|
putchar(*(line[anchor].str));
|
|
line[anchor].count = 0;
|
|
anchor++;
|
|
} else {
|
|
i = anchor;
|
|
while (i < highcol && line[i + 1].count > 1)
|
|
i++;
|
|
for (j = anchor; j <= i; j++) {
|
|
height = line[j].count - 1;
|
|
putchar(line[j].str[height]);
|
|
line[j].count = height;
|
|
}
|
|
for (j = anchor; j <= i; j++)
|
|
putchar(BS);
|
|
}
|
|
}
|
|
|
|
putchar(EOL);
|
|
highcol = -1;
|
|
}
|
|
|
|
static void
|
|
nospace(void)
|
|
{
|
|
errx(1, "Storage limit exceeded.");
|
|
}
|