/* SPDX-License-Identifier: GPL-2.0 *//* * C++ stream style string builder used in KUnit for building messages. * * Copyright (C) 2019, Google LLC. * Author: Brendan Higgins <brendanhiggins@google.com> */ #ifndef _KUNIT_STRING_STREAM_H#define _KUNIT_STRING_STREAM_H #include <linux/spinlock.h>#include <linux/types.h>#include <linux/stdarg.h> struct string_stream_fragment {	struct list_head node;	char *fragment;}; struct string_stream {	size_t length;	struct list_head fragments;	/* length and fragments are protected by this lock */	spinlock_t lock;	gfp_t gfp;	bool append_newlines;}; struct kunit; struct string_stream *kunit_alloc_string_stream(struct kunit *test, gfp_t gfp);void kunit_free_string_stream(struct kunit *test, struct string_stream *stream); struct string_stream *alloc_string_stream(gfp_t gfp);void free_string_stream(struct string_stream *stream); int __printf(2, 3) string_stream_add(struct string_stream *stream,				     const char *fmt, ...); int __printf(2, 0) string_stream_vadd(struct string_stream *stream,				      const char *fmt,				      va_list args); void string_stream_clear(struct string_stream *stream); char *string_stream_get_string(struct string_stream *stream); int string_stream_append(struct string_stream *stream,			 struct string_stream *other); bool string_stream_is_empty(struct string_stream *stream); void string_stream_destroy(struct string_stream *stream); static inline void string_stream_set_append_newlines(struct string_stream *stream,						     bool append_newlines){	stream->append_newlines = append_newlines;} #endif /* _KUNIT_STRING_STREAM_H */