Import sources from 2011-03-30 iso image

1 files changed, 89 insertions, 0 deletions

diff --git a/sys/src/cmd/webfs/buf.c b/sys/src/cmd/webfs/buf.c
new file mode 100755
index 000000000..ffd249407
--- /dev/null
+++ b/sys/src/cmd/webfs/buf.c
@@ -0,0 +1,89 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <ip.h>
+#include <plumb.h>
+#include <thread.h>
+#include <fcall.h>
+#include <9p.h>
+#include "dat.h"
+#include "fns.h"
+
+void
+initibuf(Ibuf *b, Ioproc *io, int fd)
+{
+	b->fd = fd;
+	b->io = io;
+	b->rp = b->wp = b->buf;
+}
+
+int
+readibuf(Ibuf *b, char *buf, int len)
+{
+	int n;
+
+	n = b->wp - b->rp;
+	if(n > 0){
+		if(n > len)
+			n = len;
+		memmove(buf, b->rp, n);
+		b->rp += n;
+		return n;
+	}
+	return ioreadn(b->io, b->fd, buf, len);
+}
+
+void
+unreadline(Ibuf *b, char *line)
+{
+	int i, n;
+
+	i = strlen(line);
+	n = b->wp - b->rp;
+	memmove(&b->buf[i+1], b->rp, n);
+	memmove(b->buf, line, i);
+	b->buf[i] = '\n';
+	b->rp = b->buf;
+	b->wp = b->rp+i+1+n;
+}
+
+int
+readline(Ibuf *b, char *buf, int len)
+{
+	int n;
+	char *p;
+
+	len--;
+
+	for(p = buf;;){
+		if(b->rp >= b->wp){
+			n = ioread(b->io, b->fd, b->wp, sizeof(b->buf)/2);
+			if(n < 0)
+				return -1;
+			if(n == 0)
+				break;
+			b->wp += n;
+		}
+		n = *b->rp++;
+		if(len > 0){
+			*p++ = n;
+			len--;
+		}
+		if(n == '\n')
+			break;
+	}
+
+	/* drop trailing white */
+	for(;;){
+		if(p <= buf)
+			break;
+		n = *(p-1);
+		if(n != ' ' && n != '\t' && n != '\r' && n != '\n')
+			break;
+		p--;
+	}
+
+	*p = 0;
+	return p-buf;
+}
+