93 lines
1.6 KiB
C++
93 lines
1.6 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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#include "StringStrip.hxx"
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#include "CharUtil.hxx"
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#include <algorithm>
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#include <cstring>
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const char *
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StripLeft(const char *p) noexcept
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{
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while (IsWhitespaceNotNull(*p))
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++p;
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return p;
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}
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const char *
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StripLeft(const char *p, const char *end) noexcept
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{
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while (p < end && IsWhitespaceOrNull(*p))
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++p;
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return p;
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}
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std::string_view
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StripLeft(const std::string_view s) noexcept
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{
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auto i = std::find_if_not(s.begin(), s.end(),
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[](auto ch){ return IsWhitespaceOrNull(ch); });
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#ifdef __clang__
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// libc++ doesn't yet support the C++20 constructor
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return s.substr(std::distance(s.begin(), i));
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#else
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return {
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i,
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s.end(),
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};
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#endif
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}
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const char *
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StripRight(const char *p, const char *end) noexcept
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{
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while (end > p && IsWhitespaceOrNull(end[-1]))
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--end;
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return end;
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}
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std::size_t
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StripRight(const char *p, std::size_t length) noexcept
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{
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while (length > 0 && IsWhitespaceOrNull(p[length - 1]))
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--length;
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return length;
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}
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void
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StripRight(char *p) noexcept
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{
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std::size_t old_length = std::strlen(p);
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std::size_t new_length = StripRight(p, old_length);
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p[new_length] = 0;
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}
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std::string_view
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StripRight(std::string_view s) noexcept
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{
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auto i = std::find_if_not(s.rbegin(), s.rend(),
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[](auto ch){ return IsWhitespaceOrNull(ch); });
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return s.substr(0, std::distance(i, s.rend()));
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}
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char *
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Strip(char *p) noexcept
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{
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p = StripLeft(p);
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StripRight(p);
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return p;
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}
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std::string_view
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Strip(std::string_view s) noexcept
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{
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return StripRight(StripLeft(s));
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}
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