1 files changed, 22 insertions, 0 deletions
diff --git a/src/libstddjb/cbuffer_wpeek.c b/src/libstddjb/cbuffer_wpeek.c
new file mode 100644
index 0000000..a2c6a63
--- /dev/null
+++ b/src/libstddjb/cbuffer_wpeek.c
@@ -0,0 +1,22 @@
+/* ISC license. */
+
+#include <skalibs/cbuffer.h>
+#include <skalibs/siovec.h>
+
+void cbuffer_wpeek (cbuffer_t *b, siovec_t *v)
+{
+  unsigned int last = (b->a - 1 + b->p) % b->a ;
+  v[0].s = b->x + b->n ;
+  if (last >= b->n)
+  {
+    v[0].len = last - b->n ;
+    v[1].s = 0 ;
+    v[1].len = 0 ;
+  }
+  else
+  {
+    v[0].len = b->a - b->n ;
+    v[1].s = b->x ;
+    v[1].len = last ;
+  }
+}