1 files changed, 59 insertions, 0 deletions
diff --git a/lib/compat/vasprintf.c b/lib/compat/vasprintf.c
new file mode 100644
index 0000000..9d53a32
--- /dev/null
+++ b/lib/compat/vasprintf.c
@@ -0,0 +1,59 @@
+/*
+ * libcompat - system compatibility library
+ *
+ * Copyright © 2010 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "compat.h"
+
+int
+vasprintf(char **strp, char const *fmt, va_list args)
+{
+	va_list args_copy;
+	int needed, n;
+	char *str;
+
+	va_copy(args_copy, args);
+	needed = vsnprintf(NULL, 0, fmt, args_copy);
+	va_end(args_copy);
+
+	if (needed < 0) {
+		*strp = NULL;
+		return -1;
+	}
+
+	str = malloc(needed + 1);
+	if (str == NULL) {
+		*strp = NULL;
+		return -1;
+	}
+
+	n = vsnprintf(str, needed + 1, fmt, args);
+	if (n < 0) {
+		free(str);
+		str = NULL;
+	}
+
+	*strp = str;
+
+	return n;
+}