initial import of ulidgen

1 files changed, 53 insertions, 0 deletions

diff --git a/ulidgen.c b/ulidgen.c
new file mode 100644
index 0000000..099807f
--- /dev/null
+++ b/ulidgen.c
@@ -0,0 +1,53 @@
+/*
+ * ulidgen - generate or tag lines with ULID
+ * (Universally Unique Lexicographically Sortable Identifier)
+ *
+ * Usage: ulidgen [-n N | -t]
+ *    -n N   generate N ULID (default: 1)
+ *    -t     print each line of standard input prefixed with an ULID
+ *
+ * To the extent possible under law, Leah Neukirchen <leah@vuxu.org>
+ * has waived all copyright and related or neighboring rights to this work.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "ulid.h"
+
+int
+main(int argc, char *argv[])
+{
+	char ulid[27] = { 0 };
+
+	int c;
+	long n = 1;
+	int tflag = 0;
+        while ((c = getopt(argc, argv, "n:t")) != -1)
+	        switch (c) {
+	        case 'n': n = atol(optarg); break;
+	        case 't': tflag = 1; break;
+	        }
+
+	if (tflag) {
+		char *line = 0;
+		size_t linelen = 0;
+
+		setvbuf(stdout, 0, _IOLBF, 0);
+
+		while (getdelim(&line, &linelen, '\n', stdin) != -1) {
+			ulidgen_r(ulid);
+			printf("%s %s", ulid, line);
+		}
+	} else {
+		for (long i = 0; i < n; i++) {
+			ulidgen_r(ulid);
+			puts(ulid);
+		}
+	}
+
+	fflush(0);
+	exit(!!ferror(stdout));
+}