include/tt: add function to convert table to string

Note that open_memstream() is POSIX-1.2008, so it's possible than not
all libc have already implemented this function.

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/tt.c b/lib/tt.c
index 3cca4817f..60534dfa3 100644
--- a/lib/tt.c
+++ b/lib/tt.c
@@ -986,6 +986,32 @@ int tt_print_table(struct tt *tb)
 	return 0;
 }
 
+
+/*
+ * @tb: table
+ *
+ * Prints the table to string
+ */
+int tt_print_table_to_string(struct tt *tb, char **data)
+{
+	FILE *stream;
+	size_t sz;
+
+	if (!tb)
+		return -EINVAL;
+
+	/* create a streem for output */
+	stream = open_memstream(data, &sz);
+	if (!stream)
+		return -ENOMEM;
+
+	tt_set_stream(tb, stream);
+	tt_print_table(tb);
+	fclose(stream);
+
+	return 0;
+}
+
 #ifdef TEST_PROGRAM
 #include <errno.h>