1 files changed, 52 insertions, 0 deletions
diff --git a/src/sdl/warp-buf.c b/src/sdl/warp-buf.c
new file mode 100644
index 0000000..5168c7f
--- /dev/null
+++ b/src/sdl/warp-buf.c
@@ -0,0 +1,52 @@
+#include <stdbool.h>
+#include "warp-buf.h"
+
+void
+warp_buf_clear(
+  warp_buf_t * const buf
+) {
+  buf->len = 0;
+  buf->dst = 0;
+}
+
+bool
+warp_buf_has_num(
+  const warp_buf_t * const buf
+) {
+  return buf->len > 0;
+}
+
+void
+warp_buf_push_num(
+  warp_buf_t * const buf,
+  const size_t num
+) {
+  buf->dst = buf->dst * 10 + num;
+  buf->len++;
+}
+
+void
+warp_buf_pop_num(
+  warp_buf_t * const buf
+) {
+  if (buf->len > 0) {
+    buf->len--;
+    buf->dst /= 10;
+  }
+}
+
+bool
+warp_buf_get(
+  const warp_buf_t * const buf,
+  size_t * const r
+) {
+  if (!buf->len) {
+    return false;
+  }
+
+  if (r) {
+    *r = buf->dst;
+  }
+
+  return true;
+}