41 lines
988 B
C
41 lines
988 B
C
/*
|
|
* This file is part of the UCB release of Plan 9. It is subject to the license
|
|
* terms in the LICENSE file found in the top-level directory of this
|
|
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
|
|
* part of the UCB release of Plan 9, including this file, may be copied,
|
|
* modified, propagated, or distributed except according to the terms contained
|
|
* in the LICENSE file.
|
|
*/
|
|
|
|
#include <u.h>
|
|
#include <lib9.h>
|
|
#include <bio.h>
|
|
#include "String.h"
|
|
|
|
/* Append an input line to a String.
|
|
*
|
|
* Returns a pointer to the character string (or 0).
|
|
* Trailing newline is left on.
|
|
*/
|
|
extern char *
|
|
s_read_line(Biobuf *fp, String *to)
|
|
{
|
|
char *cp;
|
|
int llen;
|
|
|
|
if(to->ref > 1)
|
|
sysfatal("can't s_read_line a shared string");
|
|
s_terminate(to);
|
|
cp = Brdline(fp, '\n');
|
|
if(cp == 0)
|
|
return 0;
|
|
llen = Blinelen(fp);
|
|
if(to->end - to->ptr < llen)
|
|
s_grow(to, llen);
|
|
memmove(to->ptr, cp, llen);
|
|
cp = to->ptr;
|
|
to->ptr += llen;
|
|
s_terminate(to);
|
|
return cp;
|
|
}
|