1 files changed, 50 insertions, 0 deletions
diff --git a/jump.c b/jump.c
new file mode 100644
index 0000000..794d79d
--- /dev/null
+++ b/jump.c
@@ -0,0 +1,50 @@
+/*
+ * TODO
+ * Copyright (C) 2024-2025  Nguyễn Gia Phong
+ *
+ * This file is part of taosc.
+ *
+ * Taosc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Taosc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with taosc.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "stdlib.c"
+
+static const void *destination;
+
+/*
+ * Get an environment variable and parse as a number.
+ * Return 0 on error.
+ */
+uint64_t getenvull(const char *name)
+{
+	const char *const s = getenv(name);
+	if (s == NULL)
+		return 0ULL;
+	errno = 0;
+	const uint64_t u = strtoull(s, NULL, 0);
+	if (errno)
+		return 0ULL;
+	return u;
+}
+
+void init(int argc, const char *const *argv, char **envp)
+{
+	environ = envp;
+	destination = (void *) getenvull("TAOSC_DEST");
+}
+
+const void *dest(void)
+{
+	return destination;
+}