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Location: cpp/openttd-patchpack/source/src/core/mem_func.hpp
r23607:36c15679007d
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text/x-c++hdr
Codechange: Use null pointer literal instead of the NULL macro
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | /* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file mem_func.hpp Functions related to memory operations. */
#ifndef MEM_FUNC_HPP
#define MEM_FUNC_HPP
#include "math_func.hpp"
/**
* Type-safe version of memcpy().
*
* @param destination Pointer to the destination buffer
* @param source Pointer to the source buffer
* @param num number of items to be copied. (!not number of bytes!)
*/
template <typename T>
static inline void MemCpyT(T *destination, const T *source, size_t num = 1)
{
memcpy(destination, source, num * sizeof(T));
}
/**
* Type-safe version of memmove().
*
* @param destination Pointer to the destination buffer
* @param source Pointer to the source buffer
* @param num number of items to be copied. (!not number of bytes!)
*/
template <typename T>
static inline void MemMoveT(T *destination, const T *source, size_t num = 1)
{
memmove(destination, source, num * sizeof(T));
}
/**
* Type-safe version of memset().
*
* @param ptr Pointer to the destination buffer
* @param value Value to be set
* @param num number of items to be set (!not number of bytes!)
*/
template <typename T>
static inline void MemSetT(T *ptr, byte value, size_t num = 1)
{
memset(ptr, value, num * sizeof(T));
}
/**
* Type-safe version of memcmp().
*
* @param ptr1 Pointer to the first buffer
* @param ptr2 Pointer to the second buffer
* @param num Number of items to compare. (!not number of bytes!)
* @return an int value indicating the relationship between the content of the two buffers
*/
template <typename T>
static inline int MemCmpT(const T *ptr1, const T *ptr2, size_t num = 1)
{
return memcmp(ptr1, ptr2, num * sizeof(T));
}
/**
* Type safe memory reverse operation.
* Reverse a block of memory in steps given by the
* type of the pointers.
*
* @param ptr1 Start-pointer to the block of memory.
* @param ptr2 End-pointer to the block of memory.
*/
template <typename T>
static inline void MemReverseT(T *ptr1, T *ptr2)
{
assert(ptr1 != nullptr && ptr2 != nullptr);
assert(ptr1 < ptr2);
do {
Swap(*ptr1, *ptr2);
} while (++ptr1 < --ptr2);
}
/**
* Type safe memory reverse operation (overloaded)
*
* @param ptr Pointer to the block of memory.
* @param num The number of items we want to reverse.
*/
template <typename T>
static inline void MemReverseT(T *ptr, size_t num)
{
assert(ptr != nullptr);
MemReverseT(ptr, ptr + (num - 1));
}
#endif /* MEM_FUNC_HPP */
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