inferno-os tree was separated from the inferno-os-android (separated from the Android driver)

1 files changed, 26 insertions, 0 deletions

diff --git a/liblogfs/gn.c b/liblogfs/gn.c
new file mode 100644
index 0000000..005bcde
--- /dev/null
+++ b/liblogfs/gn.c
@@ -0,0 +1,26 @@
+#include "logfsos.h"
+#include "logfs.h"
+#include "fcall.h"
+#include "local.h"
+
+int
+logfsgn(uchar **pp, uchar *mep, char **v)
+{
+	uchar *p = *pp;
+	int l;
+	if(p + BIT16SZ > mep)
+		return 0;
+	l = GBIT16(p); p += BIT16SZ;
+	if(p + l > mep)
+		return 0;
+	*pp = p + l;
+	if(l == 0) {
+		*v = 0;
+		return 1;
+	}
+	*v = (char *)(p - 1);
+	memmove(p - 1, p, l);
+	p[l - 1] = 0;
+	return 1;
+}
+