fgetline.c
上传用户:weiliju62
上传日期:2007-01-06
资源大小:619k
文件大小:2k
- /* @(#)fgetline.c 1.3 96/05/09 Copyright 1986 J. Schilling */
- /*
- * Copyright (c) 1986 J. Schilling
- */
- /* This program 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, or (at your option)
- * any later version.
- *
- * This program 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, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <stdio.h>
- #include "io.h"
- /*
- * XXX should we check if HAVE_USG_STDIO is defined and
- * XXX use something line memccpy to speed things up ???
- */
- int fgetline(f, buf, len)
- register FILE *f;
- char *buf;
- register int len;
- {
- register int c = ' ';
- register char *bp = buf;
- register int nl = 'n';
- down2(f, _IOREAD, _IORW);
- for(;;) {
- if((c = getc(f)) < 0)
- break;
- if(c == nl)
- break;
- if (--len > 0) {
- *bp++ = c;
- } else {
- /*
- * Read up to end of line
- */
- while ((c = getc(f)) >= 0 && c != nl)
- ;
- break;
- }
- }
- *bp = ' ';
- /*
- * If buffer is empty and we hit EOF, return EOF
- */
- if(c < 0 && bp == buf)
- return (c);
- return (bp - buf);
- }
- int getline(buf, len)
- char *buf;
- int len;
- {
- return (fgetline(stdin, buf, len));
- }