1 files changed, 42 insertions, 3 deletions

diff --git a/argv-array.c b/argv-array.c
index a4e04201e6..9e960d549c 100644
--- a/argv-array.c
+++ b/argv-array.c
@@ -2,8 +2,7 @@
 #include "argv-array.h"
 #include "strbuf.h"
 
-static const char *empty_argv_storage = NULL;
-const char **empty_argv = &empty_argv_storage;
+const char *empty_argv[] = { NULL };
 
 void argv_array_init(struct argv_array *array)
 {
@@ -39,13 +38,53 @@ void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
 	argv_array_push_nodup(array, strbuf_detach(&v, NULL));
 }
 
+void argv_array_pushl(struct argv_array *array, ...)
+{
+	va_list ap;
+	const char *arg;
+
+	va_start(ap, array);
+	while((arg = va_arg(ap, const char *)))
+		argv_array_push(array, arg);
+	va_end(ap);
+}
+
+void argv_array_pop(struct argv_array *array)
+{
+	if (!array->argc)
+		return;
+	free((char *)array->argv[array->argc - 1]);
+	array->argv[array->argc - 1] = NULL;
+	array->argc--;
+}
+
 void argv_array_clear(struct argv_array *array)
 {
 	if (array->argv != empty_argv) {
 		int i;
 		for (i = 0; i < array->argc; i++)
-			free((char **)array->argv[i]);
+			free((char *)array->argv[i]);
 		free(array->argv);
 	}
 	argv_array_init(array);
 }
+
+const char **argv_array_detach(struct argv_array *array, int *argc)
+{
+	const char **argv =
+		array->argv == empty_argv || array->argc == 0 ? NULL : array->argv;
+	if (argc)
+		*argc = array->argc;
+	argv_array_init(array);
+	return argv;
+}
+
+void argv_array_free_detached(const char **argv)
+{
+	if (argv) {
+		int i;
+		for (i = 0; argv[i]; i++)
+			free((char **)argv[i]);
+		free(argv);
+	}
+}