Remove ucore_ prefix from headers and source files

src/sprintbc.c

@@ -0,0 +1,21 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "ucore/string.h"
+
+char*
+uc_sprintbc(char *result, unsigned char value)
+{
+	char *s = result;
+	unsigned char mask = ~((unsigned char) (~0U) >> 1U);
+
+	if (s) {
+		while (mask) {
+			*s++ = (mask & value) ? '1' : '0';
+			mask >>= 1U;
+		}
+		*s = '\0';
+	}
+
+	return result;
+}
+