add print

2 files changed, 68 insertions, 0 deletions

diff --git a/src/lib9pclient/mkfile b/src/lib9pclient/mkfile
index 55882cae..b86a4828 100644
--- a/src/lib9pclient/mkfile
+++ b/src/lib9pclient/mkfile
@@ -12,6 +12,7 @@ OFILES=\
 	ns.$O\
 	open.$O\
 	openfd.$O\
+	print.$O\
 	read.$O\
 	remove.$O\
 	seek.$O\
diff --git a/src/lib9pclient/print.c b/src/lib9pclient/print.c
new file mode 100644
index 00000000..d02afb40
--- /dev/null
+++ b/src/lib9pclient/print.c
@@ -0,0 +1,67 @@
+#include <u.h>
+#include <libc.h>
+#include <fcall.h>
+#include <9pclient.h>
+
+/* C99 nonsense */
+#ifdef va_copy
+#	define VA_COPY(a,b) va_copy(a,b)
+#	define VA_END(a) va_end(a)
+#else
+#	define VA_COPY(a,b) (a) = (b)
+#	define VA_END(a)
+#endif
+
+static int
+fidflush(Fmt *f)
+{
+	int n;
+
+	n = (char*)f->to - (char*)f->start;
+	if(n && fswrite(f->farg, f->start, n) != n)
+		return 0;
+	f->to = f->start;
+	return 1;
+}
+
+static int
+fsfmtfidinit(Fmt *f, CFid *fid, char *buf, int size)
+{
+	f->runes = 0;
+	f->start = buf;
+	f->to = buf;
+	f->stop = buf + size;
+	f->flush = fidflush;
+	f->farg = fid;
+	f->nfmt = 0;
+	return 0;
+}
+
+int
+fsprint(CFid *fd, char *fmt, ...)
+{
+	int n;
+	va_list args;
+
+	va_start(args, fmt);
+	n = fsvprint(fd, fmt, args);
+	va_end(args);
+	return n;
+}
+
+int
+fsvprint(CFid *fd, char *fmt, va_list args)
+{
+	Fmt f;
+	char buf[256];
+	int n;
+
+	fsfmtfidinit(&f, fd, buf, sizeof(buf));
+	VA_COPY(f.args,args);
+	n = dofmt(&f, fmt);
+	VA_END(f.args);
+	if(n > 0 && fidflush(&f) == 0)
+		return -1;
+	return n;
+}
+