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Location: cpp/openttd-patchpack/source/src/core/mem_func.hpp - annotation
r9583:b6e25a00b908
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(svn r13621) -Fix: building roadbits in the wrong direction on bridges or building roadbits from underneath the bridge to the bridgehead is impossible, so don't silently ignore that error when building over houses and industries is not ignored.
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/** @file mem_func.hpp Functions related to memory operations. */
#ifndef MEM_FUNC_HPP
#define MEM_FUNC_HPP
#include <string.h>
#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 FORCEINLINE void MemCpyT(T *destination, const T *source, uint 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 FORCEINLINE void MemMoveT(T *destination, const T *source, uint 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 FORCEINLINE void MemSetT(T *ptr, int value, uint 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 FORCEINLINE int MemCmpT(const T *ptr1, const T *ptr2, uint 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 FORCEINLINE void MemReverseT(T *ptr1, T *ptr2)
{
assert(ptr1 != NULL && ptr2 != NULL);
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 FORCEINLINE void MemReverseT(T *ptr, uint num)
{
assert(ptr != NULL);
MemReverseT(ptr, ptr + (num - 1));
}
#endif /* MEM_FUNC_HPP */
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