18b3253cac
The plugin creates a file-system hierarchy that enabled the access of trace buffers for each component and its threads. issue #3294
70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
/*
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* \brief Session label extension
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* \author Sebastian Sumpf
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* \date 2019-06-04
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*/
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/*
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* Copyright (C) 2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _SESSION_LABEL_H_
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#define _SESSION_LABEL_H_
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#include <base/snprintf.h>
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#include <util/arg_string.h>
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#include <util/string.h>
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namespace Vfs {
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using namespace Genode;
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struct Session_label;
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}
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struct Vfs::Session_label : Genode::Session_label
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{
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private:
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static char const *_separator() { return " -> "; }
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static size_t _separator_len() { return 4; }
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public:
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using Genode::Session_label::Session_label;
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Session_label first_element() const
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{
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char const * const full = string();
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if (length() < _separator_len() + 1)
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return Session_label(Cstring(full));
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unsigned prefix_len;
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for (prefix_len = 0; prefix_len < length() - 1; prefix_len++)
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if (!strcmp(_separator(), full + prefix_len, _separator_len()))
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break;
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return Session_label(Cstring(full, prefix_len));
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}
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/**
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* Return part of the label without first element
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*/
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Session_label suffix() const
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{
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if (length() < _separator_len() + 1)
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return Session_label();
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char const * const full = string();
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for (unsigned prefix_len = 0; prefix_len < length() - 1; prefix_len++)
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if (!strcmp(_separator(), full + prefix_len, _separator_len()))
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return full + prefix_len + _separator_len();
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return Session_label();
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}
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};
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#endif /* _SESSION_LABEL_H_ */
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