78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
/*
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* \brief Utilities for string handling
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* \author Norman Feske
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* \date 2019-03-01
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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 _STRING_H_
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#define _STRING_H_
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/* Genode includes */
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#include <util/string.h>
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#include <base/output.h>
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/* local includes */
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#include "types.h"
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namespace Sculpt {
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class Subst;
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class Pretty;
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}
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class Sculpt::Subst
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{
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private:
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char const * const _pattern;
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size_t const _pattern_len = strlen(_pattern);
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char const * const _replacement;
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char const * const _input;
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public:
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/*
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* This utility is currently limited to strings. It should better
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* act as a filter that accepts any printable type as 'input'
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* argument. However the automatic deduction of class template
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* arguments from a constuctor calls is not suppored before C++17.
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*/
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Subst(char const *pattern, char const *replacement, char const *input)
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: _pattern(pattern), _replacement(replacement), _input(input) { }
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template <size_t N>
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Subst(char const *pattern, char const *replacement, String<N> const &input)
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: Subst(pattern, replacement, input.string()) { }
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void print(Output &out) const
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{
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for (char const *curr = _input; *curr; ) {
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if (_pattern_len && strcmp(curr, _pattern, _pattern_len) == 0) {
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Genode::print(out, _replacement);
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curr += _pattern_len;
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} else {
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Genode::print(out, Char(*curr));
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curr++;
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}
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}
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}
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};
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struct Sculpt::Pretty : Subst
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{
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template <size_t N>
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Pretty(String<N> const &input) : Subst("_", " ", input) { }
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};
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#endif /* _XML_H_ */
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