1 #include <u.h>
2 #include <libc.h>
3 #include <fcall.h>
4 #include <9pclient.h>
5 
6 /* C99 nonsense */
7 #ifdef va_copy
8 #	define VA_COPY(a,b) va_copy(a,b)
9 #	define VA_END(a) va_end(a)
10 #else
11 #	define VA_COPY(a,b) (a) = (b)
12 #	define VA_END(a)
13 #endif
14 
15 static int
16 fidflush(Fmt *f)
17 {
18 	int n;
19 
20 	n = (char*)f->to - (char*)f->start;
21 	if(n && fswrite(f->farg, f->start, n) != n)
22 		return 0;
23 	f->to = f->start;
24 	return 1;
25 }
26 
27 static int
28 fsfmtfidinit(Fmt *f, CFid *fid, char *buf, int size)
29 {
30 	f->runes = 0;
31 	f->start = buf;
32 	f->to = buf;
33 	f->stop = buf + size;
34 	f->flush = fidflush;
35 	f->farg = fid;
36 	f->nfmt = 0;
37 	return 0;
38 }
39 
40 int
41 fsprint(CFid *fd, char *fmt, ...)
42 {
43 	int n;
44 	va_list args;
45 
46 	va_start(args, fmt);
47 	n = fsvprint(fd, fmt, args);
48 	va_end(args);
49 	return n;
50 }
51 
52 int
53 fsvprint(CFid *fd, char *fmt, va_list args)
54 {
55 	Fmt f;
56 	char buf[256];
57 	int n;
58 
59 	fsfmtfidinit(&f, fd, buf, sizeof(buf));
60 	VA_COPY(f.args,args);
61 	n = dofmt(&f, fmt);
62 	VA_END(f.args);
63 	if(n > 0 && fidflush(&f) == 0)
64 		return -1;
65 	return n;
66 }
67