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/*
* Copyright (c) 1996, 1997, 1998, 1999, 2000
* Tama Communications Corporation
*
* This file is part of GNU GLOBAL.
*
* GNU GLOBAL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU GLOBAL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include "tab.h"
static int tabs = 8;
#define TABPOS(i) ((i)%tabs == 0)
/*
* settabs: set default tab stop
*
* i) n tab stop
*/
void
settabs(n)
int n;
{
if (n < 1 || n > 32)
return;
tabs = n;
}
/*
* detab: convert tabs into spaces and print
*
* i) op FILE *
* i) buf string including tabs
*/
void
detab(op, buf)
FILE *op;
const char *buf;
{
int src, dst;
char c;
src = dst = 0;
while ((c = buf[src++]) != 0) {
if (c == '\t') {
do {
(void)putc(' ', op);
dst++;
} while (!TABPOS(dst));
} else {
(void)putc(c, op);
dst++;
}
}
(void)putc('\n', op);
}
/*
* entab: convert spaces into tabs
*
* io) buf string buffer
*/
void
entab(buf)
char *buf;
{
int blanks = 0;
int pos, src, dst;
char c;
pos = src = dst = 0;
while ((c = buf[src++]) != 0) {
if (c == ' ') {
if (!TABPOS(++pos)) {
blanks++; /* count blanks */
continue;
}
/* don't convert single blank into tab */
buf[dst++] = (blanks == 0) ? ' ' : '\t';
} else if (c == '\t') {
while (!TABPOS(++pos))
;
buf[dst++] = '\t';
} else {
++pos;
while (blanks--)
buf[dst++] = ' ';
buf[dst++] = c;
}
blanks = 0;
}
if (blanks > 0)
while (blanks--)
buf[dst++] = ' ';
buf[dst] = 0;
}
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