1 files changed, 29 insertions, 0 deletions
diff --git a/libbb/print_numbered_lines.c b/libbb/print_numbered_lines.c
new file mode 100644
index 000000000..702aed1ea
--- /dev/null
+++ b/libbb/print_numbered_lines.c
@@ -0,0 +1,29 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright (C) 2017 Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += print_numbered_lines.o
+
+#include "libbb.h"
+
+void FAST_FUNC print_numbered_lines(struct number_state *ns, const char *filename)
+{
+	FILE *fp = fopen_or_warn_stdin(filename);
+	unsigned N = ns->start;
+	char *line;
+
+	while ((line = xmalloc_fgetline(fp)) != NULL) {
+		if (ns->all
+		 || (ns->nonempty && line[0])
+		) {
+			printf("%*u%s%s\n", ns->width, N, ns->sep, line);
+			N += ns->inc;
+		} else if (ns->empty_str)
+			fputs(ns->empty_str, stdout);
+		free(line);
+	}
+
+	fclose(fp);
+}