mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-12 09:58:36 +00:00
411 lines
7.3 KiB
C
411 lines
7.3 KiB
C
/*
|
||
* 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. 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 copyright[] =
|
||
"@(#) Copyright (c) 1989, 1993\n\
|
||
The Regents of the University of California. All rights reserved.\n";
|
||
#endif /* not lint */
|
||
|
||
#ifndef lint
|
||
static char sccsid[] = "@(#)fpr.c 8.1 (Berkeley) 6/6/93";
|
||
#endif /* not lint */
|
||
|
||
#include <stdio.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;
|
||
|
||
char cc;
|
||
char saved;
|
||
int length;
|
||
char *text;
|
||
int highcol;
|
||
COLUMN *line;
|
||
int maxpos;
|
||
int maxcol;
|
||
|
||
extern char *malloc();
|
||
extern char *calloc();
|
||
extern char *realloc();
|
||
|
||
|
||
|
||
main()
|
||
{
|
||
register int ch;
|
||
register char ateof;
|
||
register int i;
|
||
register int errorcount;
|
||
|
||
|
||
init();
|
||
errorcount = 0;
|
||
ateof = FALSE;
|
||
|
||
ch = getchar();
|
||
if (ch == EOF)
|
||
exit(0);
|
||
|
||
if (ch == EOL)
|
||
{
|
||
cc = NUL;
|
||
ungetc((int) EOL, stdin);
|
||
}
|
||
else if (ch == BLANK)
|
||
cc = NUL;
|
||
else if (ch == '1')
|
||
cc = FF;
|
||
else if (ch == '0')
|
||
cc = EOL;
|
||
else if (ch == '+')
|
||
cc = CR;
|
||
else
|
||
{
|
||
errorcount = 1;
|
||
cc = NUL;
|
||
ungetc(ch, stdin);
|
||
}
|
||
|
||
while ( ! ateof)
|
||
{
|
||
gettext();
|
||
ch = getchar();
|
||
if (ch == EOF)
|
||
{
|
||
flush();
|
||
ateof = TRUE;
|
||
}
|
||
else if (ch == EOL)
|
||
{
|
||
flush();
|
||
cc = NUL;
|
||
ungetc((int) EOL, stdin);
|
||
}
|
||
else if (ch == BLANK)
|
||
{
|
||
flush();
|
||
cc = NUL;
|
||
}
|
||
else if (ch == '1')
|
||
{
|
||
flush();
|
||
cc = FF;
|
||
}
|
||
else if (ch == '0')
|
||
{
|
||
flush();
|
||
cc = EOL;
|
||
}
|
||
else if (ch == '+')
|
||
{
|
||
for (i = 0; i < length; i++)
|
||
savech(i);
|
||
}
|
||
else
|
||
{
|
||
errorcount++;
|
||
flush();
|
||
cc = NUL;
|
||
ungetc(ch, stdin);
|
||
}
|
||
}
|
||
|
||
if (errorcount == 1)
|
||
fprintf(stderr, "Illegal carriage control - 1 line.\n");
|
||
else if (errorcount > 1)
|
||
fprintf(stderr, "Illegal carriage control - %d lines.\n", errorcount);
|
||
|
||
exit(0);
|
||
}
|
||
|
||
|
||
|
||
init()
|
||
{
|
||
register COLUMN *cp;
|
||
register COLUMN *cend;
|
||
register char *sp;
|
||
|
||
|
||
length = 0;
|
||
maxpos = MAXCOL;
|
||
sp = malloc((unsigned) maxpos);
|
||
if (sp == NULL)
|
||
nospace();
|
||
text = sp;
|
||
|
||
highcol = -1;
|
||
maxcol = MAXCOL;
|
||
line = (COLUMN *) calloc(maxcol, (unsigned) sizeof(COLUMN));
|
||
if (line == NULL)
|
||
nospace();
|
||
cp = line;
|
||
cend = line + (maxcol-1);
|
||
while (cp <= cend)
|
||
{
|
||
cp->width = INITWIDTH;
|
||
sp = calloc(INITWIDTH, (unsigned) sizeof(char));
|
||
if (sp == NULL)
|
||
nospace();
|
||
cp->str = sp;
|
||
cp++;
|
||
}
|
||
}
|
||
|
||
|
||
|
||
gettext()
|
||
{
|
||
register int i;
|
||
register char ateol;
|
||
register int ch;
|
||
register int pos;
|
||
|
||
|
||
i = 0;
|
||
ateol = FALSE;
|
||
|
||
while ( ! ateol)
|
||
{
|
||
ch = getchar();
|
||
if (ch == EOL || ch == EOF)
|
||
ateol = TRUE;
|
||
else if (ch == TAB)
|
||
{
|
||
pos = (1 + i/TABSIZE) * TABSIZE;
|
||
if (pos > maxpos)
|
||
{
|
||
maxpos = pos + 10;
|
||
text = realloc(text, (unsigned) maxpos);
|
||
if (text == NULL)
|
||
nospace();
|
||
}
|
||
while (i < pos)
|
||
{
|
||
text[i] = BLANK;
|
||
i++;
|
||
}
|
||
}
|
||
else if (ch == BS)
|
||
{
|
||
if (i > 0)
|
||
{
|
||
i--;
|
||
savech(i);
|
||
}
|
||
}
|
||
else if (ch == CR)
|
||
{
|
||
while (i > 0)
|
||
{
|
||
i--;
|
||
savech(i);
|
||
}
|
||
}
|
||
else if (ch == FF || ch == VTAB)
|
||
{
|
||
flush();
|
||
cc = ch;
|
||
i = 0;
|
||
}
|
||
else
|
||
{
|
||
if (i >= maxpos)
|
||
{
|
||
maxpos = i + 10;
|
||
text = realloc(text, (unsigned) maxpos);
|
||
if (text == NULL)
|
||
nospace();
|
||
}
|
||
text[i] = ch;
|
||
i++;
|
||
}
|
||
}
|
||
|
||
length = i;
|
||
}
|
||
|
||
|
||
|
||
savech(col)
|
||
int col;
|
||
{
|
||
register char ch;
|
||
register int oldmax;
|
||
register COLUMN *cp;
|
||
register COLUMN *cend;
|
||
register char *sp;
|
||
register int newcount;
|
||
|
||
|
||
ch = text[col];
|
||
if (ch == BLANK)
|
||
return;
|
||
|
||
saved = TRUE;
|
||
|
||
if (col >= highcol)
|
||
highcol = col;
|
||
|
||
if (col >= maxcol)
|
||
{
|
||
oldmax = maxcol;
|
||
maxcol = col + 10;
|
||
line = (COLUMN *) realloc(line, (unsigned) maxcol*sizeof(COLUMN));
|
||
if (line == NULL)
|
||
nospace();
|
||
cp = line + oldmax;
|
||
cend = line + (maxcol - 1);
|
||
while (cp <= cend)
|
||
{
|
||
cp->width = INITWIDTH;
|
||
cp->count = 0;
|
||
sp = calloc(INITWIDTH, (unsigned) 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;
|
||
}
|
||
|
||
|
||
|
||
flush()
|
||
{
|
||
register int i;
|
||
register int anchor;
|
||
register int height;
|
||
register 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;
|
||
}
|
||
|
||
|
||
|
||
nospace()
|
||
{
|
||
fputs("Storage limit exceeded.\n", stderr);
|
||
exit(1);
|
||
}
|