1 files changed, 19 insertions, 0 deletions

diff --git a/apps/plugins/lua/strspn.c b/apps/plugins/lua/strspn.c
new file mode 100644
index 0000000000..e95500a1dc
--- /dev/null
+++ b/apps/plugins/lua/strspn.c
@@ -0,0 +1,19 @@
+#include "rocklibc.h"
+
+#undef strspn
+
+size_t strspn(const char *s, const char *accept)
+{
+  size_t count;
+  for (count = 0; *s != 0; s++, count++) {
+    const char *ac;
+    for (ac = accept; *ac != 0; ac++) {
+      if (*ac == *s)
+        break;
+    }
+    if (*ac == 0) /* no acceptable char found */
+      break;
+  }
+  return count;
+}
+