1 files changed, 25 insertions, 0 deletions
diff --git a/sys/base/string/makef.c b/sys/base/string/makef.c
new file mode 100644
index 0000000..8fb9c38
--- /dev/null
+++ b/sys/base/string/makef.c
@@ -0,0 +1,25 @@
+#include "internal.h"
+
+// Newf returns a new dynamic string object
+string
+str·makef(const byte *fmt, ...)
+{
+    vlong  n;
+    string s;
+    va_list args;
+
+    va_start(args, fmt);
+    n = vsnprintf(nil, 0, fmt, args);
+    va_end(args);
+
+    s = str·makecap(nil, 0, n);
+
+    va_start(args, fmt);
+    vsnprintf(s, n + 1, fmt, args);
+    va_end(args);
+
+    Hdr* h = (Hdr*)(s - sizeof(Hdr));
+    h->len = n;
+
+    return s;
+}