zydis/include/Zydis/Internal/LibC.h

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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Joel Höner
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
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#ifndef ZYDIS_INTERNAL_LIBC_H
#define ZYDIS_INTERNAL_LIBC_H
#include <Zydis/Defines.h>
#ifndef ZYDIS_NO_LIBC
/* ============================================================================================== */
/* LibC is available */
/* ============================================================================================== */
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# include <string.h>
# define ZydisMemoryCopy memcpy
# define ZydisMemorySet memset
# define ZydisStrLen strlen
#else
/* ============================================================================================== */
/* No LibC available, use our own functions */
/* ============================================================================================== */
/*
* These implementations are by no means optimized and will be outperformed by pretty much any
* libc implementation out there. We do not aim towards providing competetive implementations here,
* but towards providing a last resort fallback for environments without a working libc.
*/
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ZYDIS_INLINE void* ZydisMemorySet(void* ptr, int value, ZydisUSize num)
{
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ZydisU8 c = value & 0xff;
for (ZydisUSize i = 0; i < num; ++i) ((ZydisU8*)ptr)[i] = c;
return ptr;
}
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ZYDIS_INLINE void* ZydisMemoryCopy(void* dst, const void* src, ZydisUSize num)
{
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for (ZydisUSize i = 0; i < num; ++i)
{
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((ZydisU8*)dst)[i] = ((const ZydisU8*)src)[i];
}
return dst;
}
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ZYDIS_INLINE ZydisUSize ZydisStrLen(const char* str)
{
const char *s;
for (s = str; *s; ++s);
return s - str;
}
/* ============================================================================================== */
#endif
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#endif /* ZYDIS_INTERNAL_LIBC_H */