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A number of test features need to do pretty complicated string printing where it may not be possible to rely on a single preallocated string with parameters. So provide a library for constructing the string as you go similar to C++'s std::string. string_stream is really just a string builder, nothing more. Signed-off-by: Brendan Higgins <brendanhiggins@google.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* C++ stream style string builder used in KUnit for building messages.
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*
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* Copyright (C) 2019, Google LLC.
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* Author: Brendan Higgins <brendanhiggins@google.com>
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*/
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#ifndef _KUNIT_STRING_STREAM_H
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#define _KUNIT_STRING_STREAM_H
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <stdarg.h>
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struct string_stream_fragment {
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struct kunit *test;
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struct list_head node;
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char *fragment;
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};
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struct string_stream {
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size_t length;
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struct list_head fragments;
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/* length and fragments are protected by this lock */
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spinlock_t lock;
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struct kunit *test;
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gfp_t gfp;
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};
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struct kunit;
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struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp);
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int __printf(2, 3) string_stream_add(struct string_stream *stream,
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const char *fmt, ...);
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int string_stream_vadd(struct string_stream *stream,
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const char *fmt,
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va_list args);
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char *string_stream_get_string(struct string_stream *stream);
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int string_stream_append(struct string_stream *stream,
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struct string_stream *other);
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bool string_stream_is_empty(struct string_stream *stream);
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int string_stream_destroy(struct string_stream *stream);
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#endif /* _KUNIT_STRING_STREAM_H */
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