71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
/*
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* String Functions
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*
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* Copyright (C) 2009-2011 Udo Steinberg <udo@hypervisor.org>
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* Economic rights: Technische Universitaet Dresden (Germany)
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*
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* Copyright (C) 2019-2025 Udo Steinberg, BlueRock Security, Inc.
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*
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* This file is part of the NOVA microhypervisor.
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*
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* NOVA is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* NOVA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*/
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#pragma once
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#include "compiler.hpp"
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#include "types.hpp"
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extern "C" NONNULL
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inline void *memcpy (void *d, void const *s, size_t n)
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{
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auto dst { static_cast<char *>(d) };
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auto src { static_cast<char const *>(s) };
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while (n--)
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*dst++ = *src++;
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return d;
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}
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extern "C" NONNULL
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inline void *memset (void *d, int c, size_t n)
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{
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auto dst { static_cast<char *>(d) };
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while (n--)
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*dst++ = static_cast<char>(c);
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return d;
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}
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extern "C" NONNULL
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inline int strcmp (char const *s1, char const *s2)
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{
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while (*s1 && *s1 == *s2)
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s1++, s2++;
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// String comparison must be done using unsigned characters
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return static_cast<unsigned char>(*s1) - static_cast<unsigned char>(*s2);
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}
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extern "C" NONNULL
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inline int strncmp (char const *s1, char const *s2, size_t n)
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{
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if (!n)
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return 0;
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while (--n && *s1 && *s1 == *s2)
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s1++, s2++;
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// String comparison must be done using unsigned characters
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return static_cast<unsigned char>(*s1) - static_cast<unsigned char>(*s2);
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}
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