1 files changed, 20 insertions, 0 deletions
diff --git a/src/base/string/fit.c b/src/base/string/fit.c
new file mode 100644
index 0000000..56ab041
--- /dev/null
+++ b/src/base/string/fit.c
@@ -0,0 +1,20 @@
+#include "internal.h"
+
+// fit reallocates the string such that the buffer is exactly sized for the
+// buffer. if the capacity equals the length, then the function is a noop. the
+// byte array is unchanged.
+void
+str·fit(string *s)
+{
+    Hdr* h;
+    vlong  cap = str·cap(*s);
+    vlong  len = str·len(*s);
+
+    if (cap == len) return;
+
+    h      = (Hdr*)(s - sizeof(Hdr));
+    h      = realloc(h, sizeof(*h) + len + 1);
+    h->cap = len;
+
+    *s     = h->buf;
+}