stringlist: implement string_list_add_asprintf

Useful for allocating a string list entry on the fly.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/include/stringlist.h b/include/stringlist.h
index 4b3cbf3118..dd3f623618 100644
--- a/include/stringlist.h
+++ b/include/stringlist.h
@@ -9,6 +9,7 @@ struct string_list {
 };
 
 int string_list_add(struct string_list *sl, char *str);
+int string_list_add_asprintf(struct string_list *sl, const char *fmt, ...);
 int string_list_add_sorted(struct string_list *sl, char *str);
 int string_list_contains(struct string_list *sl, char *str);
 void string_list_print_by_column(struct string_list *sl);
diff --git a/lib/stringlist.c b/lib/stringlist.c
index c8b835ed09..b965aa058c 100644
--- a/lib/stringlist.c
+++ b/lib/stringlist.c
@@ -1,6 +1,7 @@
 #include <common.h>
 #include <xfuncs.h>
 #include <malloc.h>
+#include <errno.h>
 #include <stringlist.h>
 
 static int string_list_compare(struct list_head *a, struct list_head *b)
@@ -24,6 +25,29 @@ int string_list_add(struct string_list *sl, char *str)
 	return 0;
 }
 
+int string_list_add_asprintf(struct string_list *sl, const char *fmt, ...)
+{
+	struct string_list *new;
+	va_list args;
+
+	new = xmalloc(sizeof(*new));
+
+	va_start(args, fmt);
+
+	new->str = vasprintf(fmt, args);
+
+	va_end(args);
+
+	if (!new->str) {
+		free(new);
+		return -ENOMEM;
+	}
+
+	list_add_tail(&new->list, &sl->list);
+
+	return 0;
+}
+
 int string_list_add_sorted(struct string_list *sl, char *str)
 {
 	struct string_list *new;