1 7f11104a 2003-12-11 devnull #include <u.h>
 2 7f11104a 2003-12-11 devnull #include <libc.h>
 3 7f11104a 2003-12-11 devnull #include <bio.h>
 4 7f11104a 2003-12-11 devnull #include "libString.h"
 5 7f11104a 2003-12-11 devnull 
 6 7f11104a 2003-12-11 devnull /* Append an input line to a String.
 7 7f11104a 2003-12-11 devnull  *
 8 7f11104a 2003-12-11 devnull  * Returns a pointer to the character string (or 0).
 9 7f11104a 2003-12-11 devnull  * Trailing newline is left on.
10 fa325e9b 2020-01-10 cross  */
11 7f11104a 2003-12-11 devnull extern char *
12 7f11104a 2003-12-11 devnull s_read_line(Biobuf *fp, String *to)
13 7f11104a 2003-12-11 devnull {
14 7f11104a 2003-12-11 devnull 	char *cp;
15 7f11104a 2003-12-11 devnull 	int llen;
16 7f11104a 2003-12-11 devnull 
17 7f11104a 2003-12-11 devnull 	if(to->ref > 1)
18 7f11104a 2003-12-11 devnull 		sysfatal("can't s_read_line a shared string");
19 7f11104a 2003-12-11 devnull 	s_terminate(to);
20 7f11104a 2003-12-11 devnull 	cp = Brdline(fp, '\n');
21 7f11104a 2003-12-11 devnull 	if(cp == 0)
22 7f11104a 2003-12-11 devnull 		return 0;
23 7f11104a 2003-12-11 devnull 	llen = Blinelen(fp);
24 7f11104a 2003-12-11 devnull 	if(to->end - to->ptr < llen)
25 7f11104a 2003-12-11 devnull 		s_grow(to, llen);
26 7f11104a 2003-12-11 devnull 	memmove(to->ptr, cp, llen);
27 7f11104a 2003-12-11 devnull 	cp = to->ptr;
28 7f11104a 2003-12-11 devnull 	to->ptr += llen;
29 7f11104a 2003-12-11 devnull 	s_terminate(to);
30 7f11104a 2003-12-11 devnull 	return cp;
31 7f11104a 2003-12-11 devnull }