lib/kunit/string-stream.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * C++ stream style string builder used in KUnit for building messages.
   4  *
   5  * Copyright (C) 2019, Google LLC.
   6  * Author: Brendan Higgins <brendanhiggins@google.com>
   7  */
   8
   9 #ifndef _KUNIT_STRING_STREAM_H
  10 #define _KUNIT_STRING_STREAM_H
  11
  12 #include <linux/spinlock.h>
  13 #include <linux/types.h>
  14 #include <stdarg.h>
  15
  16 struct string_stream_fragment {
  17         struct kunit *test;
  18         struct list_head node;
  19         char *fragment;
  20 };
  21
  22 struct string_stream {
  23         size_t length;
  24         struct list_head fragments;
  25         /* length and fragments are protected by this lock */
  26         spinlock_t lock;
  27         struct kunit *test;
  28         gfp_t gfp;
  29 };
  30
  31 struct kunit;
  32
  33 struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp);
  34
  35 int __printf(2, 3) string_stream_add(struct string_stream *stream,
  36                                      const char *fmt, ...);
  37
  38 int string_stream_vadd(struct string_stream *stream,
  39                        const char *fmt,
  40                        va_list args);
  41
  42 char *string_stream_get_string(struct string_stream *stream);
  43
  44 int string_stream_append(struct string_stream *stream,
  45                          struct string_stream *other);
  46
  47 bool string_stream_is_empty(struct string_stream *stream);
  48
  49 int string_stream_destroy(struct string_stream *stream);
  50
  51 #endif /* _KUNIT_STRING_STREAM_H */