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-rw-r--r--argv-array.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/argv-array.c b/argv-array.c
new file mode 100644
index 0000000000..a4e04201e6
--- /dev/null
+++ b/argv-array.c
@@ -0,0 +1,51 @@
+#include "cache.h"
+#include "argv-array.h"
+#include "strbuf.h"
+
+static const char *empty_argv_storage = NULL;
+const char **empty_argv = &empty_argv_storage;
+
+void argv_array_init(struct argv_array *array)
+{
+ array->argv = empty_argv;
+ array->argc = 0;
+ array->alloc = 0;
+}
+
+static void argv_array_push_nodup(struct argv_array *array, const char *value)
+{
+ if (array->argv == empty_argv)
+ array->argv = NULL;
+
+ ALLOC_GROW(array->argv, array->argc + 2, array->alloc);
+ array->argv[array->argc++] = value;
+ array->argv[array->argc] = NULL;
+}
+
+void argv_array_push(struct argv_array *array, const char *value)
+{
+ argv_array_push_nodup(array, xstrdup(value));
+}
+
+void argv_array_pushf(struct argv_array *array, const char *fmt, ...)
+{
+ va_list ap;
+ struct strbuf v = STRBUF_INIT;
+
+ va_start(ap, fmt);
+ strbuf_vaddf(&v, fmt, ap);
+ va_end(ap);
+
+ argv_array_push_nodup(array, strbuf_detach(&v, NULL));
+}
+
+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(array->argv);
+ }
+ argv_array_init(array);
+}